Merge remote-tracking branch 'origin/main' into feat/memhub-mode-projection

Co-authored-by: Cursor <cursoragent@cursor.com>

# Conflicts:
#	memhub/apps/core/src/one_memory/api.py
#	memhub/apps/core/src/one_memory/sdk_write_processor.py
#	memhub/apps/core/tests/test_memory_mode_and_evolve.py
#	memhub/apps/web/src/ApplicationsHome.tsx
#	memhub/apps/web/src/MemorySpace.tsx

CHANGELOG.md

@@ -4,8 +4,168 @@ Hy Memory and MemHub are versioned and released independently.
 
 ## Unreleased
 
+- MemHub App now exposes the complete memory-mode lifecycle. New installs
+  explicitly choose lite or pro during onboarding; pro completes only after a
+  generation model is active, while ultra remains an advanced Settings choice.
+  Settings shows mode effects, graph backfill, the default 03:00 evolve
+  schedule and manual evolve. The memory page shows original conversations in
+  lite and advanced memories in pro/ultra. Existing installs remain pro unless
+  the user changes them, and embedding maintenance blocks mode/evolve changes.
+
+## Hy Memory 2.0.13 — 2026-11-02
+
+- A model failure during a write now reports failure and stores
+  nothing. **Behaviour change for direct SDK users:** writes that used to
+  return `success: true` in a degraded state now return `success: false`;
+  retry them with a new `request_id` once the model is back.
+  - Reconcile (pro / ultra `add` and `add_extracted`): when the reconcile model
+    call fails, returns HTTP 200 with empty content, or returns a reply that
+    cannot be parsed, or reconcile raises before anything is stored, the write
+    used to fall back to adding every extracted memory as-is (no dedup or
+    evolution) and report success. That fallback is removed, with its
+    `degraded` / `degraded_reason` result fields. The write now returns
+    `success: false`, `error_code: 502`,
+    `agent_error_code: "RECONCILE_FAILED"`, and the cause in the new
+    `reconcile_error_code` (`LLM_UNAVAILABLE`, `EMPTY_RESPONSE`,
+    `JSON_PARSE_FAILED`, `RECONCILE_EXCEPTION`). None of the new memories are
+    stored, the episode counter does not advance, and `add` rolls back its
+    raw turn the same way as an extraction failure
+    (`l1_rollback.retry_safe: true`). An empty 200 reply was previously
+    counted as "no changes" and reported success with 0 memories; only a
+    literal `[]` reply still means that. `RECONCILE_ENABLED=false` is a
+    configuration choice and still writes directly.
+  - Working / coding path: an extraction model failure used to return
+    success with 0 operations. It now returns `success: false` with
+    `agent_error_code` `LLM_ERROR`, `EMPTY_RESPONSE` or `JSON_PARSE_FAILED`.
+    A model that answers with nothing worth remembering is still a success.
+    An embedding failure used to store the experience or fact without a
+    vector, where search never finds it, and report success; it now returns
+    `EMBEDDING_FAILED` and the node is not stored. A fact embedding is checked
+    before any older fact is superseded. A failed write no longer appends its
+    turns to the recent trace and records no `chain_rounds`.
+    With `MEMORY_CODING_VERBATIM_FALLBACK_ENABLED` turned on, extraction
+    failures keep the verbatim fallback.
+  - Working / coding reconcile: when the experience reconcile or the fact
+    reconcile model call fails, returns empty content, or returns a reply that
+    is not a JSON object with an `ops` list, the write returns
+    `success: false`, `agent_error_code: "RECONCILE_FAILED"` and the cause in
+    `reconcile_error_code` (`LLM_UNAVAILABLE`, `EMPTY_RESPONSE`,
+    `JSON_PARSE_FAILED`), the same as chat. Before, experience reconcile fell
+    back to adding every draft, and fact reconcile inserted the new fact
+    without superseding older ones. Both model decisions now run before
+    anything is stored, so a failure in either leaves no experience or fact
+    from the write and supersedes no older fact. An experience reply of
+    `{"ops": []}` is a valid "no changes" decision: the write succeeds and no
+    experience is stored. A non-empty `ops` list with no recognizable op is a
+    parse failure. A fact reply of `{"ops": []}` inserts the new fact without
+    superseding anything. Fact reconcile still makes no model call when there
+    are no candidates.
+
+## Hy Memory 2.0.12 — 2026-11-02
+
+- Intention dedup is now configurable per client
+  (`MemoryConfig.recall.intention_dedup_enabled`, default `true`;
+  `recall.intention_dedup_threshold`, default `MEMORY_DEDUP_THRESHOLD` or
+  `0.95`). Env defaults: `MEMORY_INTENTION_DEDUP_ENABLED`,
+  `MEMORY_INTENTION_DEDUP_THRESHOLD`. When on, behaviour is unchanged
+  (duplicates found at read time are still deleted); when off, no intention
+  dedup runs, at read time or within a write batch, and nothing is hidden,
+  dropped or deleted. The threshold applies to read-time dedup only. Refs #241.
+
+- MemHub pins `hy-memory==2.0.12` and exposes that intention dedup switch in
+  its memory-features setting (`GET`/`PUT /api/v1/settings/memory-features`,
+  `memhub settings features`): the feature `intention_dedup` (default on) and
+  the numeric `intention_dedup_threshold` (default 0.95, accepted 0.8–1.0,
+  anything else is 422 or a CLI usage error). Unset, both keep the SDK
+  default, so nothing changes for the App; a change rebuilds the SDK clients
+  like the other feature switches. The API answer gains `parameters`, and
+  `pipeline.features` can now carry the threshold as a number. Refs #241.
+
+## MemHub 1.0.6 — 2026-11-02
+
+Build 39, on `hy-memory==2.0.13`. Linux x64/arm64 Runtime and macOS arm64
+App and Runtime.
+
+- Interfaces in 11 languages: English, Simplified and Traditional Chinese,
+  Japanese, Spanish, German, Portuguese, French, Korean, Russian and
+  Indonesian. Every interface language, Simplified Chinese included, sets the
+  SDK prompt language (#270). **User-visible:** zh-Hans users now get Chinese
+  prompts and Chinese memory text for every conversation, English ones
+  included; the App sends the language it displays, also when it follows the
+  system. Only an unset language (CLI/API installs, `memhub settings language
+  system`) keeps the SDK's zh/en detection.
+- Memory modes: lite (no LLM, keeps raw conversations), pro (LLM extraction)
+  and ultra (pro plus the knowledge graph and a nightly evolve run). Set with
+  `GET`/`PUT /api/v1/settings/memory-mode` or `memhub settings mode`. Raw
+  conversations are now kept permanently. `POST /api/v2/evolve` and
+  `memhub evolve` run System 2 on demand.
+- Safe embedding-model switching: an embedding-space registry, a switch that
+  pauses writes, re-embeds every user's vectors and the graph, verifies and
+  commits atomically, and resumes after a crash or an App update. Every start
+  scans the vector store and merges data left in other spaces. When the
+  embedding service is unavailable, search returns `embedding_unavailable`.
+- Multi-user Runtime: memory APIs and the CLI take `user_id` (default
+  `local`); records are isolated per user; Hermes profiles can be connected as
+  separate users. The App keeps using `local`. Hardening (#280): read
+  responses echo `user_id`; deleting another user's memory, or one that does
+  not exist, is 404 `memory_not_found` (the App and `memhub memories delete`
+  treat it as already gone); Hermes never reads a `profiles/` directory, and
+  a root that is the `profiles` container or overlaps another user's grant is
+  refused (`hermes_root_is_profiles_container`,
+  `hermes_root_overlaps_other_user`).
+- Configurable SDK features through the CLI and API (`memhub settings
+  features`): graph rerank, episode recall, session episodes, episode
+  summaries, intention and few-shot, and the intention dedup switch with its
+  threshold (`intention_dedup`, `intention_dedup_threshold`, #277). Defaults
+  are unchanged.
+- Memory writes retry themselves (#278), each time under a new SDK request
+  id after checking whether the previous one landed; interrupted writes
+  re-run automatically. A model provider failure (401/403, 404, 408, 429,
+  5xx, timeout, unreachable) keeps the job pending in place without spending
+  a retry, and a per-profile circuit breaker paces the queue (5 s doubling to
+  180 s, one probe job at a time). Any other failure is retried after 30, 60
+  and 120 s, then `failed`. With `hy-memory==2.0.13` a model failure is no
+  longer a silent success, and a failed job's `error_code` names the SDK's
+  cause (`hy_sdk_reconcile_empty_response`, `hy_sdk_llm_error`, ...) rather
+  than `hy_sdk_write_failed`. **User-visible:** the manual 重新整理 button,
+  the "整理结果不确定" display and
+  `POST /api/v1/memory-processing/retry-unknown` are gone; a banner
+  ("模型配置有问题……记忆暂停处理，已有 N 条在排队") with a button to the model
+  settings shows while a model problem pauses processing, and clears on
+  recovery.
+- Queue, WAL and recall (#278): the WAL stays bounded (64 MiB journal limit,
+  idle `TRUNCATE` checkpoints); a disabled or revoked source's jobs are
+  `suspended` and resume when it is turned back on; SDK writes and recall
+  reads use separate thread pools, and recall has a total budget (504
+  `recall_timeout`, `broker_timeout` in clients) instead of starving behind
+  stuck writes.
+- One Runtime per data dir (#273). App quit asks the service manager at quit
+  time: an enabled background service is never stopped, a disabled one has
+  every Runtime of the data dir stopped (only after an authenticated identity
+  check), and an unknown state stops nothing. At start the App adopts a
+  Runtime of the same build, replaces an older one, and silently adopts a
+  newer one. The tray quit label follows the current state.
+- DeepSeek Harness: the app page's one switch installs and grants recall for
+  every detected profile, and keeps new profiles granted without a restart
+  (#230); versioned session files (`session.v3.jsonl.zstd`,
+  `session.v4.jsonl.zstd`) are imported, and v4 tool output goes through the
+  same clipping and scrubbing (#175).
+- The packaged Runtime accepts only a full 40-character commit, lowercased; a
+  malformed `ONE_MEMORY_COMMIT` fails the build (#235, #236).
+- Search and recall pass through the SDK's search parameters with server-side
+  score floors; the memory library filters by layer; `/api/v2/raw` returns
+  data again; v2 source and import routes; profile version history.
+- Upgrade fixes: migration no longer stops without a model profile (#234) or
+  on a pre-existing readback mismatch (#229, #240); source grants work after
+  the cutover (#233); reads use the active embedding (#242); the embedding
+  endpoint no longer follows the generation `base_url`.
+- Hermes import drops gateway notices and probes and unwraps relayed
+  messages; `memhub logs` no longer reports valid older records as damaged.
+
 ## Hy Memory 2.0.11 — 2026-11-01
 
+- Published
+  [`hy-memory==2.0.11`](https://pypi.org/project/hy-memory/2.0.11/).
 - LLM prompts now ship in 11 languages: `en`, `zh-Hans`,
   `zh-Hant`, `ja`, `es`, `de`, `pt`, `fr`, `ko`, `ru` and `id`. They live in
   one registry, `hy_memory/prompts/`, with one module per language. Call

README.md

@@ -33,6 +33,7 @@ English | [中文](README.zh.md)
 ## Latest News
 
 * *<mark>[new]</mark>* 🔥🔥🔥 **[2026-10]**: 🚀 **Open-sourced** quantized **FP8** (**[Hy-Memory-30B-A3B-FP8](https://huggingface.co/tencent/Hy-Memory-30B-A3B-FP8)**) and **GGUF** (**[Hy-Memory-30B-A3B-GGUF](https://huggingface.co/tencent/Hy-Memory-30B-A3B-GGUF)**) versions of **Hy-Memory-30B-A3B** on Hugging Face!
+* *<mark>[new]</mark>* 🔥🔥🔥 **[2026-11]**: 📦 **Released [MemHub v1.0.6](https://github.com/Tencent-Hunyuan/Hy-Memory/releases/tag/v1.0.6)** with interfaces in 11 languages, memory modes (lite / pro / ultra with nightly evolve), safe embedding-model switching, multi-user support for the CLI and API, memory writes that retry themselves and pause while the model provider is down, and more reliable upgrades, on **`hy-memory==2.0.13`**. See the release notes for details.
 * *<mark>[new]</mark>* 🔥🔥🔥 **[2026-10]**: 📦 **Released [MemHub v1.0.5](https://github.com/Tencent-Hunyuan/Hy-Memory/releases/tag/v1.0.5)** with Chinese, English and Spanish interfaces, one-time pairing codes for more custom Harnesses, and smoother browsing, search, startup and recovery, on **`hy-memory==2.0.8`**. See the release notes for details.
 * *<mark>[new]</mark>* 🔥🔥🔥 **[2026-10]**: 📦 **Released [MemHub v1.0.4](https://github.com/Tencent-Hunyuan/Hy-Memory/releases/tag/v1.0.4)** and **[memhub-cli 1.0.5](https://www.npmjs.com/package/memhub-cli/v/1.0.5)**, with a signed macOS desktop app and verified macOS/Linux Runtimes!
 * *<mark>[new]</mark>* 🔥🔥🔥 **[2026-10]**: 🚀 **Released** **Hy Memory 2.0 (`hy-memory==2.0.4`)** on [PyPI](https://pypi.org/project/hy-memory/2.0.4/) and open-sourced the **Hy-Memory** monorepo together with **[MemHub](memhub/README.md)**!

README.zh.md

@@ -33,6 +33,7 @@
 ## 最新动态
 
 * *<mark>[new]</mark>* 🔥🔥🔥 **[2026-10]**: 🚀 **模型开源** 在 Hugging Face 发布 **Hy-Memory-30B-A3B** 的 **FP8**（**[Hy-Memory-30B-A3B-FP8](https://huggingface.co/tencent/Hy-Memory-30B-A3B-FP8)**）与 **GGUF**（**[Hy-Memory-30B-A3B-GGUF](https://huggingface.co/tencent/Hy-Memory-30B-A3B-GGUF)**）量化版本模型！
+* *<mark>[new]</mark>* 🔥🔥🔥 **[2026-11]**: 📦 **正式发布 [MemHub v1.0.6](https://github.com/Tencent-Hunyuan/Hy-Memory/releases/tag/v1.0.6)**：界面支持 11 种语言，新增记忆模式（lite / pro / ultra，ultra 每晚自动整理），可安全切换嵌入模型，CLI 和 API 支持多用户，记忆写入自动重试、模型服务异常时暂停排队，升级更可靠；底层使用 **`hy-memory==2.0.13`**。详见发布说明。
 * *<mark>[new]</mark>* 🔥🔥🔥 **[2026-10]**: 📦 **正式发布 [MemHub v1.0.5](https://github.com/Tencent-Hunyuan/Hy-Memory/releases/tag/v1.0.5)**：支持中文、英文和西班牙语界面，可通过一次性配对码连接更多自定义 Harness，并优化了记忆浏览、搜索、启动和异常恢复；底层使用 **`hy-memory==2.0.8`**。详见发布说明。
 * *<mark>[new]</mark>* 🔥🔥🔥 **[2026-10]**: 📦 **正式发布 [MemHub v1.0.4](https://github.com/Tencent-Hunyuan/Hy-Memory/releases/tag/v1.0.4)** 与 **[memhub-cli 1.0.5](https://www.npmjs.com/package/memhub-cli/v/1.0.5)**，提供已签名的 macOS 桌面应用及经过验证的 macOS/Linux Runtime！
 * *<mark>[new]</mark>* 🔥🔥🔥 **[2026-10]**: 🚀 **正式发布** **Hy Memory 2.0 (`hy-memory==2.0.4`)**（已上线 [PyPI](https://pypi.org/project/hy-memory/2.0.4/)），并开源 **Hy-Memory** monorepo 与 **[MemHub](memhub/README.md)**！

docs/env_reference.md

@@ -182,9 +182,29 @@ SDK 不设置 Rerank Search 并发上限。开启后模型在 `HyMemoryClient`
 | `MEMORY_RECALL_STRENGTH_TAU` | `180` | 衰减时间常数，天 |
 | `MEMORY_RECALL_ACCESS_TRACKING` | `true` | Strength 开启时是否回写访问信息 |
 | `MEMORY_ENTITY_STORE_ENABLED` | `false` | 是否维护独立 entity collection；当前 Reader 不直接读取 |
+| `MEMORY_INTENTION_DEDUP_ENABLED` | `true` | 是否对 L7 Intention 判重（读侧和写入侧批内）；见下文 |
+| `MEMORY_INTENTION_DEDUP_THRESHOLD` | `MEMORY_DEDUP_THRESHOLD`，再缺省为 `0.95` | Intention 读侧判重的 cosine 阈值 |
 
 旧数据可调用当前公开方法 `client.build_entity_store(user_id)` 补建 Entity Store。
 
+Intention 判重：开启时（默认，与以往行为一致），Search 召回的 L7 Intention 中，
+同 `user_id` + 同 `agent_id` + `memory_at` 同一天 + `valid_until` 相同、且 cosine ≥ 阈值的
+条目视为复本，只返回最早写入的一条，其余在后台从向量库**删除**。判重不区分内容中的项目、
+对象等语义差异，内容高度相似但对象不同的意图可能被误删；写入时同一批抽取结果也会做一次
+批内判重。关闭后这两处都不判重，不隐藏、不丢弃、也不删除意图。两项对应
+`MemoryConfig.recall.intention_dedup_enabled` /
+`recall.intention_dedup_threshold`，按 client 生效，环境变量只提供默认值：
+
+```python
+client = HyMemoryClient.from_config({
+    "recall": {"intention_dedup_enabled": False},
+})
+```
+
+`MEMORY_DEDUP_THRESHOLD` 同时被写入侧批内意图判重和 dedup 内核使用；
+`MEMORY_INTENTION_DEDUP_THRESHOLD` 只影响读侧 Intention 判重，写入侧批内判重的阈值
+仍取 `MEMORY_DEDUP_THRESHOLD`。
+
 ## 日志、Trace 与历史
 
 | 变量 | 默认值 | 说明 |

docs/multi_speaker_design.md

@@ -107,5 +107,5 @@ L1_RAW 保存的内容使用上述渲染格式。历史回读时：
 ```bash
 python -m pytest -q \
   tests/test_multi_speaker_format.py \
-  tests/test_reconcile_fallback.py
+  tests/test_reconcile_failure.py
 ```

docs/scene_coding_usage.md

@@ -150,7 +150,23 @@ working/coding 写入返回双层结果：
 }
 ```
 
-`scene="coding"` 还会返回 `chain_rounds`。出于历史兼容，该字段当前统计本次识别并处理
+抽取 LLM 调用失败、返回空 content 或回复解析不出 JSON，以及经验 / 事实向量化失败时，
+写入返回 `success=False`、`error_code=502`，`agent_error_code` 依次为 `LLM_ERROR`、
+`EMPTY_RESPONSE`、`JSON_PARSE_FAILED`、`EMBEDDING_FAILED`，`error_message` 以
+`[CODE]` 开头；没有向量的经验 / 事实不会落库，失败的写入也不追加对话 trace，换一个
+`request_id` 重跑即可。模型正常作答但没有值得记的内容仍是 `success=True`、0 条。
+显式开启 `MEMORY_CODING_VERBATIM_FALLBACK_ENABLED` 时抽取失败沿用原文兜底。
+
+经验层 / 事实层 reconcile 的模型决策同样不再兜底：LLM 调用失败、返回空 content 或回复
+不是带 `ops` 列表的 JSON 对象时，写入返回 `success=False`、
+`agent_error_code="RECONCILE_FAILED"`，原因在 `reconcile_error_code`（`LLM_UNAVAILABLE` /
+`EMPTY_RESPONSE` / `JSON_PARSE_FAILED`，与 chat 链路一致）。两层的模型决策都在落库之前
+完成，任何一层失败时本次一条经验 / 事实都不存，旧事实也不会被覆盖。经验层回复
+`{"ops": []}` 表示「无需任何操作」，写入成功、经验层不存；`ops` 非空却没有一条可识别的
+op 视为解析失败。事实层回复 `{"ops": []}` 表示都不覆盖、照常插入新事实；没有候选时不
+调用 LLM。
+
+`scene="coding"` 还会返回 `chain_rounds`（写入失败时不记录演进链，也不返回该字段）。出于历史兼容，该字段当前统计本次识别并处理
 的 diff hunk 数，而不保证等于最终合并后的唯一演进 round 数。`0` 表示没有识别到可记录
 的代码修改，不代表双层 memory 写入失败。
 

docs/usage.md

@@ -128,6 +128,14 @@ result = client.add(
 双层 reconcile 操作、`experience_ids`、`fact_ids` 等字段，完整结构见
 [scene_coding_usage.md](scene_coding_usage.md#4-返回结构)。
 
+写入失败时 `success=False`，`error_code` 为 HTTP 风格的整数，`agent_error_code` 给出稳定
+失败码。pro / ultra 的 reconcile（新事实与已有记忆判重、合并）模型调用失败、返回空
+content 或回复解析不出时，`add` 与 `add_extracted` 都报 `agent_error_code="RECONCILE_FAILED"`，
+具体原因在 `reconcile_error_code`（`LLM_UNAVAILABLE` / `EMPTY_RESPONSE` /
+`JSON_PARSE_FAILED` / `RECONCILE_EXCEPTION`）。此时本次一条新记忆都不落库，`add` 已写入
+的原始对话按抽取失败同样回滚（`l1_rollback.retry_safe=True`）；模型恢复后换一个
+`request_id` 重跑即可。`RECONCILE_ENABLED=false` 时不调用 reconcile，直接写入。
+
 `mode="lite"` 不执行 LLM 抽取，写入内容直接以 `L1_RAW` 形式保存。lite 的 Search 是
 严格的 raw-only 向量检索：无论调用方传入什么 `layers`、`scene` 或 `search_mode`，都只
 召回 `L1_RAW`，不会进入 working/coding、Schema 或 Intention 链路，也不会调用场景判断

hy_memory/agent/reconciler.py

@@ -136,10 +136,10 @@ class ReconcileResult:
     ops: List[ReconcileOp] = field(default_factory=list)
     success: bool = True
     error: Optional[str] = None
-    # True = reconcile 失败后走了「全部 ADD」兜底（见 _fallback_add_ops）。
-    # 结果仍然可用（success=True），但没有做过去重/演化判定，可能引入重复。
-    degraded: bool = False
-    degraded_reason: Optional[str] = None
+    # success=False 时的稳定失败码：LLM_UNAVAILABLE / EMPTY_RESPONSE /
+    # JSON_PARSE_FAILED / RECONCILE_EXCEPTION。失败时 ops 恒为空：writer 什么都
+    # 不落库，整次写入报失败，调用方换个 request_id 重跑即可（reconcile 会判重）。
+    error_code: Optional[str] = None
     # reconcile 链路 LLM token 消耗（search-query + reconcile 两次 LLM 调用之和）
     prompt_tokens: int = 0
     completion_tokens: int = 0
@@ -151,7 +151,7 @@ class ReconcileResult:
     # 用 content 作 key 而不是 node_id：新记忆此刻还没入库、没有 id。
     candidate_scores: Dict[str, List[Tuple[str, float]]] = field(default_factory=dict)
     # reconcile 候选检索已经为每条新 memory 算过 embedding。把原始文本对应向量交回
-    # writer，ADD-all / degraded ADD 可直接落库，避免同一事实再次请求 embedding。
+    # writer，原文不变的 ADD 可直接落库，避免同一事实再次请求 embedding。
     # 仅按完全相同 content 复用；LLM 改写后的 UPDATE/SUPERSEDE 会重新计算，防止错配。
     new_memory_embeddings: Dict[str, List[float]] = field(default_factory=dict)
 
@@ -394,49 +394,6 @@ class MemoryReconciler:
 
         return [], None
 
-    @staticmethod
-    def _fallback_add_ops(
-        new_memories: List[str],
-        new_memories_with_meta: Optional[List[Dict]] = None,
-    ) -> List[ReconcileOp]:
-        """reconcile 彻底失败时的兜底：把抽取结果**原样全部 ADD**。
-
-        为什么必须有这个兜底：reconcile 只是决定「新事实和旧记忆怎么合」。它挂了（网关 500、
-        JSON 解析不出）不代表抽取结果没价值 —— 此前的行为是把一整批完好的事实**全部丢弃**，
-        线上实测因此丢掉过整块内容（含评测题的正确答案）。宁可留重复也不要丢内容：
-        重复还能被后续 dedup / reconcile 收拾，丢了就永远找不回来。
-        """
-        metas = new_memories_with_meta or []
-        by_content = {
-            (m.get("content") or ""): m for m in metas if isinstance(m, dict)
-        }
-        ops: List[ReconcileOp] = []
-        for text in new_memories:
-            if not text:
-                continue
-            meta = by_content.get(text) or {}
-            ops.append(ReconcileOp(
-                op="ADD",
-                content=text,
-                layer=meta.get("layer"),
-                tags=meta.get("tags") or [],
-                owner=meta.get("owner"),
-                topic_paths=meta.get("topic_paths") or [],
-                event_facet=meta.get("event_facet") or {},
-                topic_assignments=meta.get("topic_assignments") or [],
-                topic_paths_provided=bool(
-                    meta.get("topic_paths_provided", "topic_paths" in meta)
-                ),
-                event_facet_provided=bool(
-                    meta.get("event_facet_provided", "event_facet" in meta)
-                ),
-                topic_assignments_provided=bool(meta.get(
-                    "topic_assignments_provided", "topic_assignments" in meta,
-                )),
-                reason="reconcile unavailable → stored as-is (degraded)",
-            ))
-        return ops
-
     async def reconcile(
         self,
         new_memories: List[str],
@@ -1088,8 +1045,8 @@ class MemoryReconciler:
                     )
                 except Exception as e:
                     # LLM 彻底不可用（provider 已按 max_retries 重试过，网关 500 /
-                    # 连接错误等）。**不能让它冒泡** —— 冒泡会让整批抽取结果连带丢弃。
-                    # 交给下面的 ADD-all 兜底。
+                    # 连接错误等）。不冒泡：下面统一记 RECONCILE 失败日志，再返回
+                    # success=False —— writer 不落任何新记忆，整次写入报失败。
                     _llm_error = f"{type(e).__name__}: {e}"
                     logger.warning(f"[reconciler] RECONCILE LLM unavailable: {_llm_error}")
                     break
@@ -1097,7 +1054,7 @@ class MemoryReconciler:
                 _tok_pt += response.prompt_tokens
                 _tok_ct += response.completion_tokens
                 _tok_total += response.tokens_used
-                raw_response = response.content
+                raw_response = response.content or ""
                 ops = self._parse_ops(raw_response)
                 ops = enforce_time_order(ops, current_time, candidate_map)
                 ops = self._inherit_exact_input_structure(
@@ -1106,7 +1063,9 @@ class MemoryReconciler:
                 if _structure_metadata_on:
                     ops = self._resolve_structure_references(ops, candidate_map)
 
-                _is_empty_array = self._strip_code_fence(raw_response) in ("[]", "")
+                # 只有字面量 "[]" 才是「模型判定无需任何操作」。HTTP 200 但 content
+                # 为空不是决策，是失败：按 EMPTY_RESPONSE 处理，不能当成 0 条成功。
+                _is_empty_array = self._strip_code_fence(raw_response) == "[]"
                 if ops or _is_empty_array:
                     _parse_ok = True
                     break
@@ -1136,7 +1095,7 @@ class MemoryReconciler:
                     error_msg = (
                         f"RECONCILE LLM returned empty response after {_n_attempts} attempts"
                     )
-                    error_code = "EMPTY_RESPONSE" 
+                    error_code = "EMPTY_RESPONSE"
                 logger.warning(f"[reconciler] {error_msg}")
 
                 if cache and request_id:
@@ -1153,14 +1112,13 @@ class MemoryReconciler:
                                 {
                                     "error": error_code,
                                     "message": error_msg,
-                                    "fallback": "ADD_ALL",
-                                    "fallback_count": len(new_memories or []),
+                                    "stored": 0,
                                 },
                                 ensure_ascii=False,
                             ),
                             elapsed_ms=recon_elapsed,
-                            # LLM 彻底不可用时 response 是 None —— 这行本身会抛
-                            # AttributeError，而它正好在兜底路径上，会把兜底也一起废掉
+                            # LLM 彻底不可用时 response 是 None —— 直接取属性会抛
+                            # AttributeError，把失败日志本身也废掉
                             prompt_tokens=getattr(response, "prompt_tokens", 0) or 0,
                             completion_tokens=getattr(response, "completion_tokens", 0) or 0,
                             total_tokens=getattr(response, "tokens_used", 0) or 0,
@@ -1170,22 +1128,16 @@ class MemoryReconciler:
                             f"[reconciler] store failed RECONCILE log failed: {e}"
                         )
 
-                # 兜底：JSON 解析不出来不等于抽取结果没价值 —— 全部 ADD，别丢内容。
-                _fb = self._fallback_add_ops(new_memories, new_memories_with_meta)
-                logger.warning(
-                    f"[reconciler] falling back to ADD-all: {len(_fb)} memories "
-                    f"({error_code})"
-                )
+                # 不做 ADD-all 兜底：没经过判重 / 演化的整批 ADD 会在重跑时产生重复，
+                # 而且调用方看到 success 就不会重试。这里报失败、不落库，由调用方重跑。
                 return ReconcileResult(
-                    ops=_fb,
-                    success=bool(_fb),
-                    error=None if _fb else error_msg,
-                    degraded=bool(_fb),
-                    degraded_reason=error_code,
+                    ops=[],
+                    success=False,
+                    error=error_msg,
+                    error_code=error_code,
                     prompt_tokens=_tok_pt,
                     completion_tokens=_tok_ct,
                     total_tokens=_tok_total,
-                    new_memory_embeddings=new_memory_embeddings,
                 )
 
             # 写 RECONCILE pipeline log
@@ -1250,20 +1202,14 @@ class MemoryReconciler:
 
         except Exception as e:
             logger.error(f"[reconciler] failed: {e}", exc_info=True)
-            # 兜底同样适用于「reconcile 链路任意环节炸了」（候选检索、embed、
-            # prompt 组装…）。此前这里返回 ops=[] → writer 直接丢弃整批抽取结果。
-            _fb = self._fallback_add_ops(new_memories, new_memories_with_meta)
-            if _fb:
-                logger.warning(
-                    f"[reconciler] falling back to ADD-all after unexpected error: "
-                    f"{len(_fb)} memories"
-                )
-                return ReconcileResult(
-                    ops=_fb, success=True,
-                    degraded=True, degraded_reason=f"EXCEPTION:{type(e).__name__}",
-                    new_memory_embeddings=dict(new_memory_embeddings or {}),
-                )
-            return ReconcileResult(ops=[], success=False, error=str(e))
+            # reconcile 链路任意环节炸了（候选检索、embed、prompt 组装…）：此时还
+            # 没有任何新记忆落库，报失败让整次写入可以干净地重跑。
+            return ReconcileResult(
+                ops=[],
+                success=False,
+                error=f"{type(e).__name__}: {e}",
+                error_code="RECONCILE_EXCEPTION",
+            )
 
     @staticmethod
     def _inherit_exact_input_structure(

hy_memory/client.py

@@ -134,6 +134,7 @@ _WRITE_DIAGNOSTIC_KEYS = (
     "agent_status",
     "agent_error_code",
     "agent_error",
+    "reconcile_error_code",
     "l1_rollback",
     "l1_rollback_failed",
     "partial_agent_persist",
@@ -3032,7 +3033,9 @@ class HyMemoryClient:
                 # 版本演进链层（scene="coding" 独有）。放在 writer.write 之后、返回
                 # 之前，因为它只依赖对话原文，与向量层写入结果无关。
                 # best-effort：这层挂不上不影响本次 add 的向量层产出。
-                if scene_variant == "coding":
+                # 向量层写入失败（success=False）时跳过：调用方会重跑整段，失败的
+                # 那次不该先把改动记进演进链。
+                if scene_variant == "coding" and resp.get("success"):
                     resp["chain_rounds"] = self._observe_chain(
                         chat_messages, user_id=uid,
                         workspace_id=workspace_id, branch=branch,

hy_memory/coding/__init__.py

@@ -12,6 +12,7 @@ HY Memory - Coding Memory 模块
 
 from .types import (
     CodingMemory,
+    CodingWriteError,
     CodingMemoryDraft,
     ReconcileOp,
     WorkingFact,
@@ -26,6 +27,7 @@ from .types import (
 
 __all__ = [
     "CodingMemory",
+    "CodingWriteError",
     "CodingMemoryDraft",
     "ReconcileOp",
     "WorkingFact",

hy_memory/coding/extractor.py

@@ -33,7 +33,7 @@ from .preproc import (
     prepare_extractor_messages,
 )
 from .judge import _store_coding_log
-from .types import CodingMemoryDraft, WorkingFactDraft
+from .types import CodingMemoryDraft, CodingWriteError, WorkingFactDraft
 
 
 
@@ -217,6 +217,10 @@ class CodingMemoryExtractor:
         Returns:
             (经验草稿, 事实草稿)。两层都可能为空。只有显式启用
             verbatim_fallback_enabled 时，模型没产出 fact 才调用 _verbatim_fact。
+
+        Raises:
+            CodingWriteError: 未开启原文兜底时，LLM 调用失败（LLM_ERROR）、返回空
+                content（EMPTY_RESPONSE）或回复解析不出 JSON 对象（JSON_PARSE_FAILED）。
         """
         if not messages:
             return [], []
@@ -268,8 +272,9 @@ class CodingMemoryExtractor:
             )
         except Exception as e:
             logger.warning(f"[coding-extract] LLM call failed: {e}")
-            # 经验层不兜底。事实层原文兜底也默认关闭，避免 assistant/tool 轨迹被
-            # 当作 statement 直接展示；仅在配置显式开启时保留旧行为。
+            # 经验层不兜底。事实层原文兜底默认关闭，避免 assistant/tool 轨迹被
+            # 当作 statement 直接展示；关闭时 LLM 失败抛 CodingWriteError(LLM_ERROR)，
+            # 整次写入报失败，而不是「成功、0 条」。仅在配置显式开启时保留旧行为。
             verbatim = (
                 self._verbatim_fact(messages)
                 if self.verbatim_fallback_enabled else None
@@ -296,9 +301,33 @@ class CodingMemoryExtractor:
                 ),
                 elapsed_ms=round((time.perf_counter() - _t0) * 1000, 2),
             )
+            if not self.verbatim_fallback_enabled:
+                raise CodingWriteError(
+                    "LLM_ERROR",
+                    f"coding extract LLM call failed: {type(e).__name__}: {e}",
+                ) from e
             return [], ([verbatim] if verbatim else [])
         _elapsed = round((time.perf_counter() - _t0) * 1000, 2)
 
+        # 模型答了且没有可记的内容（如 {"experiences": [], "fact": null}）是正常的空
+        # 抽取；200 但 content 为空、或回复解析不出 JSON 对象，是模型失败，不能当成
+        # 「成功、0 条」。原文兜底显式开启时沿用旧行为（交给下面的 verbatim 兜底）。
+        failure = self._output_failure(resp.content)
+        if failure is not None and not self.verbatim_fallback_enabled:
+            code, message = failure
+            await _store_coding_log(
+                self.cache, request_id=request_id, user_id=user_id, agent_id=agent_id,
+                session_id=session_id or "", step="CODING_EXTRACT", prompt=prompt,
+                response=resp.content or "",
+                parsed=json.dumps(
+                    {"drafts": 0, "error": code, "message": message},
+                    ensure_ascii=False,
+                ),
+                elapsed_ms=_elapsed, prompt_tokens=resp.prompt_tokens,
+                completion_tokens=resp.completion_tokens, total_tokens=resp.tokens_used,
+            )
+            raise CodingWriteError(code, message)
+
         raw_experiences, raw_facts = self._parse_output(resp.content)
 
         # 经验层的 files 走规则抽取（整段轨迹碰过的文件）；事实层的 files 由 LLM
@@ -478,12 +507,22 @@ class CodingMemoryExtractor:
         return "\n".join(rows)
 
     @classmethod
-    def _parse_output(
-        cls, text: str
-    ) -> Tuple[List[Dict[str, Any]], List[Dict[str, Any]]]:
-        """宽松解析 LLM 输出 JSON，返回 (experiences, facts) 两个原始列表。"""
+    def _output_failure(cls, text: Optional[str]) -> Optional[Tuple[str, str]]:
+        """回复本身是失败时返回 (error_code, message)；正常（含空抽取）返回 None。"""
+        if not (text or "").strip():
+            return "EMPTY_RESPONSE", "coding extract LLM returned empty response"
+        if cls._load_output_object(text) is None:
+            return (
+                "JSON_PARSE_FAILED",
+                f"coding extract output is not a JSON object ({len(text)} chars)",
+            )
+        return None
+
+    @staticmethod
+    def _load_output_object(text: Optional[str]) -> Optional[Dict[str, Any]]:
+        """宽松解析 LLM 输出，返回顶层 JSON 对象；解析不出返回 None。"""
         if not text:
-            return [], []
+            return None
         s = text.strip()
         # 去 markdown fence
         if s.startswith("```"):
@@ -509,8 +548,17 @@ class CodingMemoryExtractor:
                     obj = json.loads(s[start: end + 1])
                 except Exception:
                     obj = None
+        return obj if isinstance(obj, dict) else None
 
-        if not isinstance(obj, dict):
+    @classmethod
+    def _parse_output(
+        cls, text: str
+    ) -> Tuple[List[Dict[str, Any]], List[Dict[str, Any]]]:
+        """宽松解析 LLM 输出 JSON，返回 (experiences, facts) 两个原始列表。"""
+        if not text:
+            return [], []
+        obj = cls._load_output_object(text)
+        if obj is None:
             logger.warning(
                 f"[coding-extract] failed to parse output ({len(text or '')} chars)"
             )

hy_memory/coding/fact_reconciler.py

@@ -18,6 +18,7 @@ import json
 import logging
 import os
 import uuid
+from dataclasses import dataclass, field
 from datetime import datetime
 from typing import Any, Dict, List, Optional, Tuple
 
@@ -34,6 +35,7 @@ from .types import (
 
 
     MAX_FACT_CHAIN_ENTRIES,
+    CodingWriteError,
     FactReconcileOp,
     WorkingFact,
     WorkingFactDraft,
@@ -259,6 +261,16 @@ def build_chain_summary_prompt(
     return with_output_language(prompt, code, explicit=explicit is not None), code
 
 
+@dataclass
+class FactReconcilePlan:
+    """plan() 的产物：覆盖判定已完成、尚未落库。apply() 才执行 store 操作。"""
+
+    drafts: List[WorkingFactDraft]
+    candidates: List[List[WorkingFact]] = field(default_factory=list)
+    supersedes: Dict[int, List[str]] = field(default_factory=dict)
+    context: Dict[str, Any] = field(default_factory=dict)
+
+
 # ================================================================
 # WorkingFactReconciler
 # ================================================================
@@ -327,15 +339,63 @@ class WorkingFactReconciler:
         language: Optional[str] = None,
     ) -> Tuple[List[WorkingFact], List[FactReconcileOp]]:
         """
-        执行 reconcile + 持久化。memory_at 是这段对话的时间，记到新事实上。
-        language 为显式 prompt 语言码（None → zh/en 自动检测），同时用于演变总结。
+        执行 reconcile + 持久化（plan() 后紧接 apply()）。memory_at 是这段对话的
+        时间，记到新事实上。language 为显式 prompt 语言码（None → zh/en 自动检测），
+        同时用于演变总结。
 
         Returns:
-            (真正落库的新事实, 执行过的 ops)。LLM 挂掉时退化为全 INSERT 不覆盖，
-            宁可多留一条过期事实，也不因为一次调用失败丢结论。
+            (真正落库的新事实, 执行过的 ops)。
+
+        Raises:
+            CodingWriteError(RECONCILE_FAILED)：覆盖判定的 LLM 失败 / 空回复 /
+                解析不出。此时既不插入新事实，也不覆盖任何旧事实。
         """
+        plan = await self.plan(
+            drafts,
+            user_id=user_id,
+            agent_id=agent_id,
+            session_id=session_id,
+            workspace_id=workspace_id,
+            branch=branch,
+            source=source,
+            memory_at=memory_at,
+            language=language,
+        )
+        return await self.apply(plan)
+
+    async def plan(
+        self,
+        drafts: List[WorkingFactDraft],
+        *,
+        user_id: str,
+        agent_id: str = "default_agent",
+        session_id: Optional[str] = None,
+        workspace_id: Optional[str] = None,
+        branch: Optional[str] = None,
+        source: str = "default",
+        memory_at: Optional[datetime] = None,
+        language: Optional[str] = None,
+    ) -> FactReconcilePlan:
+        """检索 candidates + 覆盖判定，不落库。
+
+        没有任何候选时不调 LLM（全部 INSERT 是确定的结论，不是兜底）。调了 LLM 时，
+        有效回复 = JSON 对象且 "ops" 是列表（空列表 = 都不覆盖、只插入）。LLM 调用
+        失败（LLM_UNAVAILABLE）、200 但 content 为空（EMPTY_RESPONSE）、回复不是
+        上述形状（JSON_PARSE_FAILED）时抛 CodingWriteError(RECONCILE_FAILED)。
+        此前 LLM 失败会退化为全 INSERT 不覆盖，留下本该被接续的旧事实。
+        """
+        context = dict(
+            user_id=user_id,
+            agent_id=agent_id,
+            session_id=session_id,
+            workspace_id=workspace_id,
+            branch=branch,
+            source=source,
+            memory_at=memory_at,
+            language=language,
+        )
         if not drafts:
-            return [], []
+            return FactReconcilePlan(drafts=[], context=context)
 
         candidates = await self._retrieve_candidates(
             drafts,
@@ -349,27 +409,37 @@ class WorkingFactReconciler:
 
         try:
             supersedes = await self._llm_decide(drafts, candidates, language=language)
+        except CodingWriteError:
+            raise
         except Exception as e:
-            logger.warning(
-                f"[fact-reconcile] LLM decide failed, insert without supersede: {e}"
-            )
-            supersedes = {}
+            logger.warning(f"[fact-reconcile] LLM decide failed: {e}")
+            raise CodingWriteError(
+                "RECONCILE_FAILED",
+                f"working fact reconcile LLM call failed: {type(e).__name__}: {e}",
+                cause="LLM_UNAVAILABLE",
+            ) from e
 
+        return FactReconcilePlan(
+            drafts=list(drafts),
+            candidates=candidates,
+            supersedes=supersedes,
+            context=context,
+        )
+
+    async def apply(
+        self, plan: FactReconcilePlan,
+    ) -> Tuple[List[WorkingFact], List[FactReconcileOp]]:
+        """执行 plan() 的决策（覆盖旧事实 + 插入新事实）。"""
+        if not plan.drafts:
+            return [], []
         facts, ops = await self._execute(
-            drafts,
-            candidates,
-            supersedes,
-            user_id=user_id,
-            agent_id=agent_id,
-            session_id=session_id,
-            workspace_id=workspace_id,
-            branch=branch,
-            source=source,
-            memory_at=memory_at,
-            language=language,
+            plan.drafts,
+            plan.candidates,
+            plan.supersedes,
+            **plan.context,
         )
         logger.info(
-            f"[fact-reconcile] drafts={len(drafts)} inserted={len(facts)} "
+            f"[fact-reconcile] drafts={len(plan.drafts)} inserted={len(facts)} "
             f"superseded={sum(1 for o in ops if o.action == 'SUPERSEDE')}"
         )
         return facts, ops
@@ -473,6 +543,11 @@ class WorkingFactReconciler:
             max_tokens=self.max_tokens,
             audit_stage="coding_fact_reconcile",
         )
+        failure = self._reply_failure(resp.content)
+        if failure is not None:
+            code, message = failure
+            logger.warning(f"[fact-reconcile] {code}: {message}")
+            raise CodingWriteError("RECONCILE_FAILED", message, cause=code)
         return self._parse_ops(resp.content)
 
     # ------------------------------------------------------------
@@ -599,11 +674,24 @@ class WorkingFactReconciler:
             rows.append(f"for draft[{i}]:\n" + "\n".join(cand_rows))
         return "\n\n".join(rows) if rows else "(none)"
 
+    @classmethod
+    def _reply_failure(cls, text: Optional[str]) -> Optional[Tuple[str, str]]:
+        """回复本身是失败时返回 (cause, message)；有效回复（含 {"ops": []}）返回 None。"""
+        if not (text or "").strip():
+            return "EMPTY_RESPONSE", "working fact reconcile LLM returned empty response"
+        obj = cls._load_object(text)
+        if not isinstance(obj, dict) or not isinstance(obj.get("ops"), list):
+            return (
+                "JSON_PARSE_FAILED",
+                f"working fact reconcile output has no ops list ({len(text)} chars)",
+            )
+        return None
+
     @staticmethod
-    def _parse_ops(text: str) -> Dict[int, List[str]]:
-        """宽松解析 ops，返回 {draft_idx: [fact_id...]}。"""
+    def _load_object(text: Optional[str]) -> Optional[Dict[str, Any]]:
+        """宽松解析出顶层 JSON 对象；解析不出返回 None。"""
         if not text:
-            return {}
+            return None
         s = text.strip()
         # 去 markdown fence
         if s.startswith("```"):
@@ -621,7 +709,14 @@ class WorkingFactReconciler:
                     obj = json.loads(s[start: end + 1])
                 except Exception:
                     obj = None
+        return obj if isinstance(obj, dict) else None
 
+    @classmethod
+    def _parse_ops(cls, text: str) -> Dict[int, List[str]]:
+        """宽松解析 ops，返回 {draft_idx: [fact_id...]}。"""
+        if not text:
+            return {}
+        obj = cls._load_object(text)
         if not isinstance(obj, dict):
             logger.warning(
                 f"[fact-reconcile] failed to parse ops output ({len(text or '')} chars)"
@@ -689,6 +784,11 @@ class WorkingFactReconciler:
                 memory_at=memory_at,
             )
 
+            # 先确认新事实能向量化，再去覆盖旧事实：否则 embedding 挂掉时旧事实
+            # 已被软删、新事实又落不了库，这条结论就凭空没了。失败抛
+            # CodingWriteError(EMBEDDING_FAILED)，整次写入报失败。
+            new_embedding = await self.store.embed_fact(new_fact)
+
             allowed = {c.fact_id for c in (candidates[idx] if idx < len(candidates) else [])}
             targets = [
                 fid for fid in supersedes.get(idx, [])
@@ -769,7 +869,9 @@ class WorkingFactReconciler:
                         )
 
             try:
-                await self.store.insert_fact(new_fact)
+                await self.store.insert_fact(new_fact, embedding=new_embedding)
+            except CodingWriteError:
+                raise
             except Exception as e:
                 logger.warning(f"[fact-reconcile] INSERT failed: {e}")
                 continue

hy_memory/coding/reconciler.py

@@ -7,6 +7,9 @@ Coding Memory Reconciler
         （DELETE 由 LLM 在 draft 与 candidate 关系中观察到"明确否定/作废"时附带产出）
 
 执行端：reconcile() 调用 store 完成实际 ADD / UPDATE / DELETE 持久化操作。
+CodingWriter 分两步用：先 plan()（检索 + LLM 决策，不落库），等经验层与事实层的
+模型决策都成功后再 apply()（落库）。LLM 失败 / 空回复 / 解析不出时 plan() 抛
+CodingWriteError(RECONCILE_FAILED)，本次写入什么都不存。
 
 复用 LLMConfig.model（与 chat reconciler 共用）。
 
@@ -17,6 +20,7 @@ import json
 import logging
 import time
 import uuid
+from dataclasses import dataclass, field
 from typing import Any, Dict, List, Optional, Tuple
 
 from ..agent.llm_provider import LLMProvider
@@ -29,7 +33,7 @@ from ..prompts import (
 )
 from .judge import _store_coding_log
 from .store import CodingMemoryStore
-from .types import CodingMemory, CodingMemoryDraft, ReconcileOp
+from .types import CodingMemory, CodingMemoryDraft, CodingWriteError, ReconcileOp
 
 
 
@@ -93,6 +97,15 @@ def build_experience_reconcile_prompt(
     return with_output_language(prompt, code, explicit=explicit is not None), code
 
 
+@dataclass
+class ExperienceReconcilePlan:
+    """plan() 的产物：模型已决策、尚未落库。apply() 才执行 store 操作。"""
+
+    drafts: List[CodingMemoryDraft]
+    candidates_per_draft: List[List[CodingMemory]] = field(default_factory=list)
+    ops: List[ReconcileOp] = field(default_factory=list)
+
+
 # ================================================================
 # CodingMemoryReconciler
 # ================================================================
@@ -143,21 +156,52 @@ class CodingMemoryReconciler:
         language: Optional[str] = None,
     ) -> List[ReconcileOp]:
         """
-        执行 reconcile + 持久化。返回执行的 ReconcileOp[]（含成功执行的 ADD/UPDATE/DELETE/SKIP）。
+        执行 reconcile + 持久化（plan() 后紧接 apply()）。返回执行的 ReconcileOp[]
+        （含成功执行的 ADD/UPDATE/DELETE/SKIP）。
 
-        执行错误（如 LLM 失败）会 fail-safe 回退到对每个 draft 直接 ADD。
+        LLM 失败、空回复或解析不出时抛 CodingWriteError(RECONCILE_FAILED)，什么都
+        不落库——不再回退成「全部 ADD」。
+        """
+        plan = await self.plan(
+            drafts,
+            request_id=request_id,
+            user_id=user_id,
+            agent_id=agent_id,
+            session_id=session_id,
+            language=language,
+        )
+        return await self.apply(plan)
 
-        cache 非空时落 CODING_RECONCILE pipeline log——在 LLM 决策后、执行入库前打点，
-        这样即使 store 入库崩溃，reconcile 决策仍已可见（crash 不丢）。
+    async def plan(
+        self,
+        drafts: List[CodingMemoryDraft],
+        *,
+        request_id: str = "",
+        user_id: str = "",
+        agent_id: str = "default_agent",
+        session_id: str = "",
+        language: Optional[str] = None,
+    ) -> ExperienceReconcilePlan:
+        """检索 candidates + LLM 决策，不落库。
+
+        有效回复 = 一个 JSON 对象，其 "ops" 是列表：
+          - {"ops": []}：模型判定「无需任何操作」（与 chat reconcile 的 [] 同义），
+            成功、本层什么都不存；
+          - 非空列表：至少要有一条可识别的 op（ADD/UPDATE/DELETE/SKIP），否则视为
+            解析失败。漏掉的 draft 仍按原规则补 ADD（那是对有效回复的校验兜底，
+            不是模型失败兜底）。
+        LLM 调用失败（LLM_UNAVAILABLE）、200 但 content 为空（EMPTY_RESPONSE）、
+        回复不是上述形状（JSON_PARSE_FAILED）时抛 CodingWriteError(RECONCILE_FAILED)。
+
+        cache 非空时落 CODING_RECONCILE pipeline log（成功、失败都落）。
         """
         if not drafts:
-            return []
+            return ExperienceReconcilePlan(drafts=[])
 
         # 从 draft 回填 trace 身份（writer 通常显式传，这里兜底）
-        if drafts:
-            user_id = user_id or drafts[0].user_id
-            agent_id = agent_id or drafts[0].agent_id
-            session_id = session_id or (drafts[0].session_id or "")
+        user_id = user_id or drafts[0].user_id
+        agent_id = agent_id or drafts[0].agent_id
+        session_id = session_id or (drafts[0].session_id or "")
 
         # 1. 检索 candidates
         candidates_per_draft: List[List[CodingMemory]] = await self._retrieve_candidates(drafts)
@@ -167,19 +211,20 @@ class CodingMemoryReconciler:
         _decide_prompt = ""
         _decide_raw = ""
         _decide_resp = None
+        failure: Optional[Tuple[str, str]] = None
+        ops: List[ReconcileOp] = []
         try:
             ops, _decide_prompt, _decide_raw, _decide_resp = await self._llm_decide(
                 drafts, candidates_per_draft, language=language,
             )
+            failure = self._reply_failure(_decide_raw)
         except Exception as e:
-            logger.warning(f"[coding-reconcile] LLM decide failed, fallback to ADD-all: {e}")
-            ops = [ReconcileOp(action="ADD", draft_idx=i) for i in range(len(drafts))]
+            logger.warning(f"[coding-reconcile] LLM decide failed: {e}")
             _decide_raw = f"[LLM error] {type(e).__name__}: {str(e)[:300]}"
-
-        if not ops:
-            # LLM 输出无 ops，但有 drafts → fallback ADD-all
-            logger.info("[coding-reconcile] LLM returned no ops, fallback to ADD-all")
-            ops = [ReconcileOp(action="ADD", draft_idx=i) for i in range(len(drafts))]
+            failure = (
+                "LLM_UNAVAILABLE",
+                f"coding reconcile LLM call failed: {type(e).__name__}: {e}",
+            )
 
         _decide_elapsed = round((time.perf_counter() - _t0) * 1000, 2)
         # CODING_RECONCILE：LLM 决策完成即打点（执行入库之前，crash 不丢）
@@ -187,17 +232,42 @@ class CodingMemoryReconciler:
             self.cache, request_id=request_id, user_id=user_id, agent_id=agent_id,
             session_id=session_id, step="CODING_RECONCILE",
             prompt=_decide_prompt, response=_decide_raw,
-            parsed=json.dumps({"ops": [o.to_dict() for o in ops]}, ensure_ascii=False, default=str),
+            parsed=json.dumps(
+                {"error": failure[0], "message": failure[1], "stored": 0}
+                if failure else {"ops": [o.to_dict() for o in ops]},
+                ensure_ascii=False, default=str,
+            ),
             elapsed_ms=_decide_elapsed,
             prompt_tokens=getattr(_decide_resp, "prompt_tokens", 0) if _decide_resp else 0,
             completion_tokens=getattr(_decide_resp, "completion_tokens", 0) if _decide_resp else 0,
             total_tokens=getattr(_decide_resp, "tokens_used", 0) if _decide_resp else 0,
         )
+        if failure is not None:
+            code, message = failure
+            logger.warning(f"[coding-reconcile] {code}: {message}")
+            raise CodingWriteError("RECONCILE_FAILED", message, cause=code)
 
-        # 3. 校验 + 执行
-        executed = await self._execute(ops, drafts, candidates_per_draft)
+        return ExperienceReconcilePlan(
+            drafts=list(drafts),
+            candidates_per_draft=candidates_per_draft,
+            ops=ops,
+        )
+
+    async def apply(self, plan: ExperienceReconcilePlan) -> List[ReconcileOp]:
+        """执行 plan() 的决策（store ADD / UPDATE / DELETE）。"""
+        if not plan.drafts:
+            return []
+        if not plan.ops:
+            # 有效的 {"ops": []}：模型判定无需任何操作，本层什么都不存。
+            logger.info(
+                f"[coding-reconcile] drafts={len(plan.drafts)} LLM decided no ops"
+            )
+            return []
+        executed = await self._execute(
+            plan.ops, plan.drafts, plan.candidates_per_draft,
+        )
         logger.info(
-            f"[coding-reconcile] drafts={len(drafts)} ops={len(executed)} "
+            f"[coding-reconcile] drafts={len(plan.drafts)} ops={len(executed)} "
             + ", ".join(f"{a}={sum(1 for o in executed if o.action == a)}"
                         for a in ("ADD", "UPDATE", "DELETE", "SKIP"))
         )
@@ -316,11 +386,30 @@ class CodingMemoryReconciler:
             rows.append(f"for draft[{i}]:\n" + "\n".join(cand_rows))
         return "\n\n".join(rows) if rows else "(none)"
 
+    @classmethod
+    def _reply_failure(cls, text: Optional[str]) -> Optional[Tuple[str, str]]:
+        """回复本身是失败时返回 (cause, message)；有效回复（含 {"ops": []}）返回 None。"""
+        if not (text or "").strip():
+            return "EMPTY_RESPONSE", "coding reconcile LLM returned empty response"
+        obj = cls._load_object(text)
+        ops_raw = obj.get("ops") if isinstance(obj, dict) else None
+        if not isinstance(ops_raw, list):
+            return (
+                "JSON_PARSE_FAILED",
+                f"coding reconcile output has no ops list ({len(text)} chars)",
+            )
+        if ops_raw and not cls._parse_ops(text):
+            return (
+                "JSON_PARSE_FAILED",
+                f"coding reconcile output has no recognizable op ({len(text)} chars)",
+            )
+        return None
+
     @staticmethod
-    def _parse_ops(text: str) -> List[ReconcileOp]:
-        """宽松解析 ops 列表。"""
+    def _load_object(text: Optional[str]) -> Optional[Dict[str, Any]]:
+        """宽松解析出顶层 JSON 对象；解析不出返回 None。"""
         if not text:
-            return []
+            return None
         s = text.strip()
         # 去 markdown fence
         if s.startswith("```"):
@@ -344,8 +433,15 @@ class CodingMemoryReconciler:
                     obj = json.loads(s[start: end + 1])
                 except Exception:
                     obj = None
+        return obj if isinstance(obj, dict) else None
 
-        if not obj or not isinstance(obj, dict):
+    @classmethod
+    def _parse_ops(cls, text: str) -> List[ReconcileOp]:
+        """宽松解析 ops 列表。"""
+        if not text:
+            return []
+        obj = cls._load_object(text)
+        if not obj:
             logger.warning(
                 f"[coding-reconcile] failed to parse ops output ({len(text or '')} chars)"
             )
@@ -394,6 +490,9 @@ class CodingMemoryReconciler:
         - UPDATE  需 draft_idx 合法 + target_experience_id 非空
         - DELETE  需 target_experience_id 非空
         - SKIP    不执行任何 store 操作
+
+        向量化失败（CodingWriteError(EMBEDDING_FAILED)）不吞成「少执行一条」，
+        原样抛给 CodingWriter，整次写入报失败。
         """
         executed: List[ReconcileOp] = []
         # 已被 UPDATE 占用的 draft_idx → 防止同 draft 被重复 ADD/UPDATE
@@ -414,6 +513,8 @@ class CodingMemoryReconciler:
                     op.target_experience_id = memory.experience_id  # 回写 id 供 caller 读
                     executed.append(op)
                     consumed.add(op.draft_idx)
+                except CodingWriteError:
+                    raise
                 except Exception as e:
                     logger.warning(f"[coding-reconcile] ADD failed: {e}")
 
@@ -444,6 +545,8 @@ class CodingMemoryReconciler:
                     await self.store.update(memory)
                     executed.append(op)
                     consumed.add(op.draft_idx)
+                except CodingWriteError:
+                    raise
                 except Exception as e:
                     logger.warning(f"[coding-reconcile] UPDATE failed: {e}")
 
@@ -487,6 +590,8 @@ class CodingMemoryReconciler:
                     target_experience_id=memory.experience_id,
                     reason="fallback ADD (no LLM op)",
                 ))
+            except CodingWriteError:
+                raise
             except Exception as e:
                 logger.warning(f"[coding-reconcile] fallback ADD failed: {e}")
 

hy_memory/coding/store.py

@@ -44,7 +44,7 @@ from ..data.vector_store import create_vector_store
 from ..data.vector_store_base import VectorStoreBase
 from ..models.memory import MemoryLayer, MemoryNode, MemoryStatus
 from ..utils.async_executor import run_in_executor_guarded
-from .types import CodingMemory, WorkingFact
+from .types import CodingMemory, CodingWriteError, WorkingFact
 
 logger = logging.getLogger(__name__)
 
@@ -599,10 +599,15 @@ class CodingMemoryStore:
     # ------------------------------------------------------------
 
     async def insert(self, memory: CodingMemory) -> None:
-        """新增一条 coding memory（SQLite + VDB 全套）"""
+        """新增一条 coding memory（SQLite + VDB 全套）。
+
+        先向量化再落 SQLite：向量化失败抛 CodingWriteError(EMBEDDING_FAILED)，
+        什么都不写，不留一条没有向量、永远检索不到的经验。
+        """
         self._fill_timestamps(memory)
+        embeddings = await self._embed_vec_keys(memory)
         await _run_in_pool(self._upsert_sql_sync, memory)
-        await self._upsert_vec_keys(memory)
+        await self._upsert_vec_keys(memory, embeddings=embeddings)
         logger.info(
             f"[coding-store] inserted experience_id={memory.experience_id} "
             f"keys={1 + len(memory.search_keys)}"
@@ -627,6 +632,8 @@ class CodingMemoryStore:
         ):
             raise ValueError("coding_memory_update_authority_mismatch")
         prev_key_count = 1 + len(prev.search_keys)
+        # 先向量化：失败时旧经验（SQLite 与向量行）原样保留，不改一个字。
+        embeddings = await self._embed_vec_keys(memory)
 
         memory.updated_at = datetime.utcnow()
         if memory.created_at is None:
@@ -637,7 +644,7 @@ class CodingMemoryStore:
         # 删旧 VDB
         await self._delete_vec_keys_by_count(memory.experience_id, prev_key_count)
         # 写新 VDB
-        await self._upsert_vec_keys(memory)
+        await self._upsert_vec_keys(memory, embeddings=embeddings)
         logger.info(
             f"[coding-store] updated experience_id={memory.experience_id} "
             f"old_keys={prev_key_count} new_keys={1 + len(memory.search_keys)}"
@@ -1000,12 +1007,22 @@ class CodingMemoryStore:
     # 事实层
     # ------------------------------------------------------------
 
-    async def insert_fact(self, fact: WorkingFact) -> None:
-        """新增一条事实（SQLite + 事实 collection 各一行）。"""
+    async def insert_fact(
+        self, fact: WorkingFact, embedding: Optional[List[float]] = None,
+    ) -> None:
+        """新增一条事实（SQLite + 事实 collection 各一行）。
+
+        embedding 可由调用方预先用 embed_fact() 算好（fact reconcile 要在覆盖旧
+        事实之前确认新事实能向量化）；不传时这里算。向量化失败抛
+        CodingWriteError(EMBEDDING_FAILED)，什么都不写。
+        """
         if fact.created_at is None:
             fact.created_at = datetime.utcnow()
+        # 先向量化再落 SQLite，理由同 insert()：不落没有向量的事实。
+        if embedding is None:
+            embedding = await self.embed_fact(fact)
         await _run_in_pool(self._upsert_fact_sql_sync, fact)
-        await self._upsert_fact_vec(fact)
+        await self._upsert_fact_vec(fact, embedding=embedding)
         logger.info(f"[coding-store] inserted fact_id={fact.fact_id}")
         logger.debug(
             f"[coding-store] inserted fact_id={fact.fact_id} "
@@ -1574,25 +1591,64 @@ class CodingMemoryStore:
     # VDB 实现
     # ------------------------------------------------------------
 
-    async def _upsert_vec_keys(self, memory: CodingMemory) -> None:
-        """把 task + search_keys 写入 VDB（每行一个 MemoryNode）。"""
-        if self._vec is None:
-            return
-
+    @staticmethod
+    def _vec_key_texts(memory: CodingMemory) -> List[Tuple[str, str]]:
         all_keys: List[Tuple[str, str]] = [("task", memory.task)]
         for k in memory.search_keys:
             if k:
                 all_keys.append(("aspect", k))
+        return all_keys
+
+    async def _embed_vec_keys(
+        self, memory: CodingMemory
+    ) -> Optional[List[List[float]]]:
+        """写入链路用：向量化 task + search_keys，失败抛 CodingWriteError。
+
+        无 VDB 时返回 None（不需要向量）。
+        """
+        if self._vec is None:
+            return None
+        texts = [t for _, t in self._vec_key_texts(memory)]
+        try:
+            embeddings = await self.embed_service.embed_batch(texts)
+        except Exception as e:
+            logger.warning(f"[coding-store] embed_batch failed: {e}")
+            raise CodingWriteError(
+                "EMBEDDING_FAILED",
+                f"coding experience embedding failed: {type(e).__name__}: {e}",
+            ) from e
+        if len(embeddings or []) != len(texts) or not all(embeddings):
+            raise CodingWriteError(
+                "EMBEDDING_FAILED",
+                "coding experience embedding returned no vector",
+            )
+        return embeddings
+
+    async def _upsert_vec_keys(
+        self,
+        memory: CodingMemory,
+        embeddings: Optional[List[List[float]]] = None,
+    ) -> None:
+        """把 task + search_keys 写入 VDB（每行一个 MemoryNode）。
+
+        embeddings 由写入链路预先算好（见 _embed_vec_keys）；不传时现算，
+        失败只记 warning（edit_experience 的手动编辑路径沿用这一行为）。
+        """
+        if self._vec is None:
+            return
+
+        all_keys = self._vec_key_texts(memory)
         if not all_keys:
             return
 
         # batch embed
         texts = [t for _, t in all_keys]
-        try:
-            embeddings = await self.embed_service.embed_batch(texts)
-        except Exception as e:
-            logger.warning(f"[coding-store] embed_batch failed: {e}")
-            return
+        if embeddings is None:
+            try:
+                embeddings = await self.embed_service.embed_batch(texts)
+            except Exception as e:
+                logger.warning(f"[coding-store] embed_batch failed: {e}")
+                return
 
         nodes: List[MemoryNode] = []
         for i, ((kind, text), emb) in enumerate(zip(all_keys, embeddings)):
@@ -1623,7 +1679,34 @@ class CodingMemoryStore:
         except Exception as e:
             logger.warning(f"[coding-store] vdb upsert_batch failed: {e}")
 
-    async def _upsert_fact_vec(self, fact: WorkingFact) -> None:
+    @staticmethod
+    def _fact_vector_text(fact: WorkingFact) -> str:
+        return f"{fact.subject}: {fact.statement}" if fact.subject else fact.statement
+
+    async def embed_fact(self, fact: WorkingFact) -> Optional[List[float]]:
+        """写入链路用：向量化事实检索文本，失败抛 CodingWriteError。
+
+        无事实 VDB 或 statement 为空时返回 None（不需要向量）。
+        """
+        if self._fact_vec is None or not fact.statement:
+            return None
+        try:
+            embedding = await self.embed_service.embed(self._fact_vector_text(fact))
+        except Exception as e:
+            logger.warning(f"[coding-store] fact embed failed: {e}")
+            raise CodingWriteError(
+                "EMBEDDING_FAILED",
+                f"working fact embedding failed: {type(e).__name__}: {e}",
+            ) from e
+        if not embedding:
+            raise CodingWriteError(
+                "EMBEDDING_FAILED", "working fact embedding returned no vector",
+            )
+        return embedding
+
+    async def _upsert_fact_vec(
+        self, fact: WorkingFact, embedding: Optional[List[float]] = None,
+    ) -> None:
         """事实入向量库。一条事实一行，node_id 就是 fact_id。
 
         检索文本是 statement，前面缀上 subject（有的话）。subject 通常已经在
@@ -1634,14 +1717,14 @@ class CodingMemoryStore:
         """
         if self._fact_vec is None or not fact.statement:
             return
-        vector_text = (
-            f"{fact.subject}: {fact.statement}" if fact.subject else fact.statement
-        )
-        try:
-            embedding = await self.embed_service.embed(vector_text)
-        except Exception as e:
-            logger.warning(f"[coding-store] fact embed failed: {e}")
-            return
+        vector_text = self._fact_vector_text(fact)
+        if embedding is None:
+            # edit_fact 的手动编辑路径：现算，失败只记 warning。
+            try:
+                embedding = await self.embed_service.embed(vector_text)
+            except Exception as e:
+                logger.warning(f"[coding-store] fact embed failed: {e}")
+                return
 
         node = MemoryNode(
             node_id=fact.fact_id,

hy_memory/coding/types.py

@@ -25,6 +25,25 @@ FactStatus = Literal["active", "superseded"]
 MAX_FACT_CHAIN_ENTRIES = 8
 
 
+class CodingWriteError(RuntimeError):
+    """working / coding 写入链路里让整次写入失败的模型错误。
+
+    error_code 是稳定失败码，CodingWriter 原样透传为 agent_error_code：
+    - LLM_ERROR          抽取 LLM 调用失败
+    - EMPTY_RESPONSE     抽取 LLM 返回 200 但 content 为空
+    - JSON_PARSE_FAILED  抽取 LLM 的回复解析不出 JSON 对象
+    - EMBEDDING_FAILED   经验 / 事实向量化失败（不落没有向量的节点）
+    - RECONCILE_FAILED   经验 / 事实 reconcile 的模型决策失败；具体原因在 cause
+                         （LLM_UNAVAILABLE / EMPTY_RESPONSE / JSON_PARSE_FAILED），
+                         透传为 reconcile_error_code，与 chat 链路一致
+    """
+
+    def __init__(self, error_code: str, message: str, cause: Optional[str] = None):
+        super().__init__(message)
+        self.error_code = error_code
+        self.cause = cause
+
+
 def _epoch(value: Optional[datetime]) -> Optional[int]:
     """memory_at 对外是秒级 epoch，与 chat 一致。"""
     return int(value.timestamp()) if isinstance(value, datetime) else None

hy_memory/coding/writer.py

@@ -10,8 +10,9 @@ CodingWriter - 写入端协调器
              ├── recent history: 最近 K 个 user-turn（只作上下文）
              ├── new messages: 本次全部 turn（只做单条限长）
              ├── extractor.extract(...)            ← 一次 LLM 产出双层草稿
-             ├── reconciler.reconcile(经验草稿)     ← ADD/UPDATE/DELETE/SKIP
-             ├── fact_reconciler.reconcile(事实草稿) ← INSERT/SUPERSEDE
+             ├── reconciler.plan(经验草稿)          ← ADD/UPDATE/DELETE/SKIP 决策
+             ├── fact_reconciler.plan(事实草稿)      ← INSERT/SUPERSEDE 决策
+             ├── reconciler.apply / fact_reconciler.apply ← 两层决策都成功后才落库
              └── _crosslink(...)                   ← 同批全互链回填
 """
 
@@ -30,7 +31,7 @@ from .judge import classify_messages_is_coding
 from .preproc import has_any_tool_message, prepare_extractor_messages
 from .reconciler import CodingMemoryReconciler
 from .store import CodingMemoryStore
-from .types import FactReconcileOp, ReconcileOp, WorkingFact
+from .types import CodingWriteError, FactReconcileOp, ReconcileOp, WorkingFact
 
 logger = logging.getLogger(__name__)
 
@@ -104,6 +105,13 @@ class CodingWriter:
                 ],
                 "fact_ids": ["..."],         # 这趟真正落库的 fact_id
             }
+
+        模型失败（抽取 LLM 调用失败 / 空回复 / 解析不出）或向量化失败时返回
+        success=False，agent_error_code 为 LLM_ERROR / EMPTY_RESPONSE /
+        JSON_PARSE_FAILED / EMBEDDING_FAILED，error_code=502。经验层 / 事实层
+        reconcile 的模型决策失败时 agent_error_code=RECONCILE_FAILED，原因在
+        reconcile_error_code（LLM_UNAVAILABLE / EMPTY_RESPONSE / JSON_PARSE_FAILED），
+        本次什么都不落库。模型答了但没有值得记的内容仍是 success=True、0 条。
         """
         request_id = request_id or str(uuid.uuid4())
         t0 = time.perf_counter()
@@ -143,6 +151,10 @@ class CodingWriter:
         # 跟库里已有的什么关系是 reconcile 的事。把已有 task 摆到它面前，它会把
         # 一个其实不同的任务往清单里某个措辞上靠，reconciler 随后判成 UPDATE 合并
         # 掉，那个区别就没了——措辞对不上顶多多存一条，措辞被带偏是直接写错。
+        #
+        # 模型失败（LLM 调用失败 / 空回复 / 解析不出）抛 CodingWriteError：整次写入
+        # 报失败、什么都不存，连 trace 也不追加——调用方换个 request_id 重跑时，
+        # 历史窗口里不会多出这段本该是「新消息」的对话。
         try:
             drafts, fact_drafts = await self.extractor.extract(
                 messages,
@@ -156,26 +168,26 @@ class CodingWriter:
                 request_id=request_id,
                 language=language,
             )
-        finally:
-            # 历史服务于下一次 write；即使本次没跨过价值门槛，也不能丢掉上下文。
-            try:
-                await self.store.append_trace(
-                    current_messages,
-                    request_id=request_id,
-                    user_id=user_id,
-                    agent_id=agent_id or "default_agent",
-                    session_id=session_id,
-                    workspace_id=workspace_id,
-                    branch=branch,
-                    source=source,
-                )
-            except Exception as e:
-                logger.warning(f"[coding-write] append trace failed: {e}")
+        except CodingWriteError as e:
+            return self._failure_response(request_id, t0, e)
+
+        trace_kwargs = dict(
+            request_id=request_id,
+            user_id=user_id,
+            agent_id=agent_id or "default_agent",
+            session_id=session_id,
+            workspace_id=workspace_id,
+            branch=branch,
+            source=source,
+        )
 
         if not drafts and not fact_drafts:
+            # 模型答了、只是没有值得记的：正常的空抽取，仍算成功。历史服务于下一次
+            # write；即使本次没跨过价值门槛，也不能丢掉上下文。
             logger.info(
                 f"[coding-write] no drafts produced (value bar); request_id={request_id}"
             )
+            await self._append_trace(current_messages, **trace_kwargs)
             return self._empty_response(request_id, t0)
 
         # extractor 只负责内容；调用来源由 SDK 入口注入，不能交给 LLM 生成。
@@ -183,34 +195,51 @@ class CodingWriter:
             draft.source = source
             draft.memory_at = memory_at
 
-        # 3. 经验层 reconcile + 持久化
-        ops: List[ReconcileOp] = (
-            await self.reconciler.reconcile(
-                drafts,
-                request_id=request_id,
-                user_id=user_id,
-                agent_id=agent_id,
-                session_id=session_id or "",
-                language=language,
-            )
-            if drafts else []
-        )
-
-        # 4. 事实层 reconcile + 持久化（独立链路，不受经验层结果影响）
+        # 3. 两层 reconcile 的模型决策（只检索 + 调 LLM，不落库）
+        # 4. 两层决策都成功后才落库：经验层 apply → 事实层 apply
+        #
+        # 先把所有模型决策做完再写库，任何一层的决策失败（LLM 失败 / 空回复 /
+        # 解析不出 → CodingWriteError(RECONCILE_FAILED)）都发生在落库之前，本次
+        # 写入一条经验 / 事实都没存、也没覆盖旧事实，换个 request_id 重跑即干净。
+        # 两层决策互不依赖（各自检索各自的候选），提前做不改变结果。
+        #
+        # 向量化失败抛 CodingWriteError(EMBEDDING_FAILED)：不落没有向量的节点，
+        # 整次写入报失败。
         facts: List[WorkingFact] = []
         fact_ops: List[FactReconcileOp] = []
-        if fact_drafts:
-            facts, fact_ops = await self.fact_reconciler.reconcile(
-                fact_drafts,
-                user_id=user_id,
-                agent_id=agent_id,
-                session_id=session_id,
-                workspace_id=workspace_id,
-                branch=branch,
-                source=source,
-                memory_at=memory_at,
-                language=language,
+        ops: List[ReconcileOp] = []
+        try:
+            experience_plan = (
+                await self.reconciler.plan(
+                    drafts,
+                    request_id=request_id,
+                    user_id=user_id,
+                    agent_id=agent_id,
+                    session_id=session_id or "",
+                    language=language,
+                )
+                if drafts else None
             )
+            fact_plan = (
+                await self.fact_reconciler.plan(
+                    fact_drafts,
+                    user_id=user_id,
+                    agent_id=agent_id,
+                    session_id=session_id,
+                    workspace_id=workspace_id,
+                    branch=branch,
+                    source=source,
+                    memory_at=memory_at,
+                    language=language,
+                )
+                if fact_drafts else None
+            )
+            if experience_plan is not None:
+                ops = await self.reconciler.apply(experience_plan)
+            if fact_plan is not None:
+                facts, fact_ops = await self.fact_reconciler.apply(fact_plan)
+        except CodingWriteError as e:
+            return self._failure_response(request_id, t0, e)
 
         experience_ids = [op.target_experience_id for op in ops
                           if op.action in ("ADD", "UPDATE") and op.target_experience_id]
@@ -218,6 +247,7 @@ class CodingWriter:
 
         # 5. 同批全互链
         await self._crosslink(experience_ids, facts, user_id=user_id)
+        await self._append_trace(current_messages, **trace_kwargs)
 
         add_cnt = sum(1 for op in ops if op.action == "ADD")
         update_cnt = sum(1 for op in ops if op.action == "UPDATE")
@@ -298,6 +328,41 @@ class CodingWriter:
                         f"[coding-write] crosslink fact {f.fact_id} failed: {e}"
                     )
 
+    async def _append_trace(self, current_messages: List[ChatMessage], **kwargs) -> None:
+        """把本次对话追加进 recent trace（下一次 write 的历史上下文），best-effort。"""
+        try:
+            await self.store.append_trace(current_messages, **kwargs)
+        except Exception as e:
+            logger.warning(f"[coding-write] append trace failed: {e}")
+
+    def _failure_response(
+        self, request_id: str, t0: float, error: CodingWriteError,
+    ) -> Dict[str, Any]:
+        """模型 / 向量化失败：success=False，稳定失败码在 agent_error_code。
+
+        形状与 chat 链路的失败回执一致（error_code=502，error_message 带
+        「[CODE] 」前缀），调用方据 success 判定并重跑。
+        """
+        code = error.error_code
+        cause = getattr(error, "cause", None)
+        message = f"{cause}: {error}" if cause else str(error)
+        logger.warning(
+            f"[coding-write] failed: code={code} request_id={request_id}: {message}"
+        )
+        resp = self._empty_response(request_id, t0)
+        resp.update({
+            "success": False,
+            "error_code": 502,
+            "error_message": f"[{code}] {message}",
+            "agent_status": "failed",
+            "agent_error_code": code,
+            "agent_error": message,
+        })
+        if cause:
+            # 与 chat 链路一致：reconcile 失败的具体原因
+            resp["reconcile_error_code"] = cause
+        return resp
+
     def _empty_response(self, request_id: str, t0: float) -> Dict[str, Any]:
         return {
             "success": True,

hy_memory/config.py

@@ -432,6 +432,14 @@ class RecallConfig:
     retrieval_clauses_require_keyword: bool = None  # env: MEMORY_RETRIEVAL_CLAUSES_REQUIRE_KEYWORD
     retrieval_clauses_min_keyword_score: float = None  # normalized BM25 floor
     supplemental_propositions_enabled: bool = None  # env: MEMORY_SUPPLEMENTAL_PROPOSITIONS_ENABLED
+    # ── Intention（L7）判重 ──
+    # 开启（默认）：召回时同 user+agent+同天 memory_at+同 valid_until 且
+    # cosine≥阈值 的意图视为复本，只返回最早一条，其余异步从 VDB 删除（历史行为）。
+    # 关闭：读侧与写入侧批内都不判重——不隐藏、不丢弃、不删除任何意图。
+    intention_dedup_enabled: bool = None       # env: MEMORY_INTENTION_DEDUP_ENABLED
+    # 读侧意图判重 cosine 阈值。env: MEMORY_INTENTION_DEDUP_THRESHOLD，
+    # 未设置时回退到共享的 MEMORY_DEDUP_THRESHOLD（兼容旧部署），默认 0.95。
+    intention_dedup_threshold: float = None
 
     # 最小分数阈值
     min_score_threshold: float = 0.0
@@ -750,6 +758,15 @@ class RecallConfig:
             self.supplemental_propositions_enabled = _get_env_bool(
                 "MEMORY_SUPPLEMENTAL_PROPOSITIONS_ENABLED", False
             )
+        if self.intention_dedup_enabled is None:
+            self.intention_dedup_enabled = _get_env_bool(
+                "MEMORY_INTENTION_DEDUP_ENABLED", True
+            )
+        if self.intention_dedup_threshold is None:
+            self.intention_dedup_threshold = _get_env_float(
+                "MEMORY_INTENTION_DEDUP_THRESHOLD",
+                _get_env_float("MEMORY_DEDUP_THRESHOLD", 0.95),
+            )
 
 
 @dataclass
@@ -1384,6 +1401,8 @@ class MemoryConfig:
                 "supplemental_propositions_enabled": (
                     self.recall.supplemental_propositions_enabled
                 ),
+                "intention_dedup_enabled": self.recall.intention_dedup_enabled,
+                "intention_dedup_threshold": self.recall.intention_dedup_threshold,
             },
             "pipeline": {
                 "default_version": self.pipeline.default_version,

hy_memory/pipelines/_retrieval/intention.py

@@ -15,6 +15,9 @@ HY Memory - Intention (L7) 召回 + 惰性过期转换 + 复本判定
     → 视为同一个意图的复本（extractor 复读机 / 多 session 重复表达）。
     保留组里 `gmt_created` 最早的（老的先来先得，稳定 id）；
   - **异步删库**：其余复本 fire-and-forget 从 VDB 删除，不影响本次调用 RT。
+  - **开关**：判重受 `MemoryConfig.recall.intention_dedup_enabled`（默认开）与
+    `recall.intention_dedup_threshold` 控制，由 reader 按 client 配置传入。
+    关闭时完全跳过判重：不隐藏、不删除任何意图（写入侧批内判重同样跳过）。
 
 Q: 为什么要看 memory_at 和 valid_until？
 A: 意图是 point-in-time 信号。同一句"我周五要开会"，如果一条 memory_at 在
@@ -38,8 +41,14 @@ from ...models.memory import MemoryLayer, MemoryStatus
 logger = logging.getLogger(__name__)
 
 
-def _get_dedup_threshold() -> float:
-    """去重 cosine 阈值：沿用 dedup 内核的 MEMORY_DEDUP_THRESHOLD，默认 0.95。"""
+def _get_dedup_threshold(configured: Optional[float] = None) -> float:
+    """去重 cosine 阈值：优先用 client 配置；否则（或配置非法）沿用 dedup 内核的
+    MEMORY_DEDUP_THRESHOLD，默认 0.95。"""
+    try:
+        if configured is not None:
+            return float(configured)
+    except (TypeError, ValueError):
+        logger.warning(f"[intention] invalid dedup threshold: {configured!r}")
     try:
         return float(os.environ.get("MEMORY_DEDUP_THRESHOLD", 0.95))
     except (TypeError, ValueError):
@@ -244,6 +253,8 @@ async def recall_intentions(
     stats_out: Optional[Dict[str, Any]] = None,
     include_sources: Optional[List[str]] = None,
     exclude_sources: Optional[List[str]] = None,
+    dedup_enabled: bool = True,
+    dedup_threshold: Optional[float] = None,
 ) -> List[Dict[str, Any]]:
     """
     召回未过期的 L7_INTENTION 节点（VDB），惰性过期转 L2_FACT，判重并异步删复本。
@@ -260,6 +271,11 @@ async def recall_intentions(
         now: 当前时间（默认 datetime.now()，测试可注入）
         stats_out: 可选 dict，本函数把分段耗时与数量**原地回填**进去，供调用方落
             READ_INTENTION pipeline log。传 None 则完全不统计（零开销）。
+        dedup_enabled: 是否执行读侧判重（及复本异步删库）。False 时跳过判重，
+            所有未过期意图原样返回，不删除任何节点。默认 True（历史行为）。
+        dedup_threshold: 判重 cosine 阈值。None 时回退到 env
+            MEMORY_DEDUP_THRESHOLD（默认 0.95），兼容直接调用本函数的旧代码；
+            reader 总是传入 `recall.intention_dedup_threshold`。
 
     Returns:
         [{"node_id", "score", "node", "layer": "l7_intention", "source": "vdb_intention"}, ...]
@@ -272,7 +288,7 @@ async def recall_intentions(
     埋点字段（回填进 stats_out）:
       耗时(ms): vdb_search_ms / expire_ms / backfill_embed_ms / dedup_ms / total_ms
       数量: fetched / expired / survivors / dedup_dropped / returned
-      配置: fetch_limit / out_limit / dedup_threshold
+      配置: fetch_limit / out_limit / dedup_enabled / dedup_threshold
       说明: expire_ms、backfill_embed_ms 只有真的发生了对应操作才非 0，
             借此可判断慢在 VDB 检索、逐条过期转换、补拉向量还是判重计算。
     """
@@ -358,7 +374,7 @@ async def recall_intentions(
     _t = time.perf_counter()
     _backfilled = 0
     _missing_cnt = 0
-    if survivors:
+    if survivors and dedup_enabled:  # 补拉只为判重；关闭时无需这次 VDB 读
         missing_ids = [
             h.get("node_id") for h in survivors
             if h.get("node_id") and not getattr(h.get("node"), "embedding", None)
@@ -391,18 +407,23 @@ async def recall_intentions(
     )
 
     # 2. 判重：同 user + 同天 memory_at + valid_until 同日 + cosine≥threshold
+    #    dedup_enabled=False → 完全跳过：不隐藏、不删除。
     _t = time.perf_counter()
-    threshold = _get_dedup_threshold()
-    try:
-        kept, delete_ids = _partition_duplicates(survivors, threshold)
-    except Exception as e:
-        # 任何 dedup 异常 → 降级为不去重（返回全部 survivors 截断 limit）
-        logger.warning(f"[intention] dedup partition failed, degrade to raw: {e}")
+    threshold = _get_dedup_threshold(dedup_threshold)
+    if dedup_enabled:
+        try:
+            kept, delete_ids = _partition_duplicates(survivors, threshold)
+        except Exception as e:
+            # 任何 dedup 异常 → 降级为不去重（返回全部 survivors 截断 limit）
+            logger.warning(f"[intention] dedup partition failed, degrade to raw: {e}")
+            kept, delete_ids = survivors, []
+    else:
         kept, delete_ids = survivors, []
     # 纯 CPU（cosine 两两比较）；survivors 多时可能显著
     _stat(
         dedup_ms=round((time.perf_counter() - _t) * 1000, 2),
         dedup_dropped=len(delete_ids),
+        dedup_enabled=bool(dedup_enabled),
         dedup_threshold=threshold,
     )
 

hy_memory/pipelines/reader_base.py

@@ -1856,6 +1856,12 @@ class BaseReadPipeline(ReadPipeline):
                     stats_out=_intent_stats,
                     include_sources=request.include_sources,
                     exclude_sources=request.exclude_sources,
+                    dedup_enabled=bool(getattr(
+                        self.config.recall, "intention_dedup_enabled", True
+                    )),
+                    dedup_threshold=getattr(
+                        self.config.recall, "intention_dedup_threshold", None
+                    ),
                 )
                 await trace_log.log_intention(
                     stats=_intent_stats,

hy_memory/pipelines/writer.py

@@ -73,6 +73,19 @@ def _write_apply_verify_enabled() -> bool:
 _RECONCILE_LOOP_USER_LOCKS = weakref.WeakKeyDictionary()
 
 
+class ReconcileFailure(str):
+    """reconcile 失败时 `_reconcile_and_store` 返回的 error：仍是错误信息字符串，
+    另带稳定的失败码 `code`（LLM_UNAVAILABLE / EMPTY_RESPONSE / JSON_PARSE_FAILED /
+    RECONCILE_EXCEPTION），供 writer 透传给调用方。"""
+
+    code: str = "RECONCILE_FAILED"
+
+    def __new__(cls, message: str, code: str = "RECONCILE_FAILED"):
+        obj = super().__new__(cls, message)
+        obj.code = code
+        return obj
+
+
 def _reconcile_user_lock(user_id: str) -> asyncio.Lock:
     loop = asyncio.get_running_loop()
     locks = _RECONCILE_LOOP_USER_LOCKS.get(loop)
@@ -635,6 +648,7 @@ class MemoryWriter(WritePipeline):
         不查 VDB、不做"新写入 vs 库里已有"的对比，避免给 VDB 增加读压力。
         库内存量污染由 recall 侧异步删除逐步清理。best-effort：任何异常都
         回退到"不判重、全写入"，绝不影响 upsert 主流程。
+        `recall.intention_dedup_enabled=False` 时跳过批内判重，全部写入。
         """
         if not intentions:
             return []
@@ -660,7 +674,11 @@ class MemoryWriter(WritePipeline):
         # ============ 批内 dedup（不查 VDB，只对本批 intentions 互斥判重） ============
         keep_mask: List[bool] = [True] * len(intentions)
         try:
-            dropped = self._intention_batch_dedup(intentions, embeddings)
+            dropped = (
+                self._intention_batch_dedup(intentions, embeddings)
+                if getattr(self.config.recall, "intention_dedup_enabled", True)
+                else []
+            )
             for i in dropped:
                 if 0 <= i < len(keep_mask):
                     keep_mask[i] = False
@@ -1257,15 +1275,6 @@ class MemoryWriter(WritePipeline):
             recon_tokens 含 prompt/completion/total（reconcile 链路 LLM 消耗）
         """
         stored_ids: List[str] = []
-        # Episode：本次写入归属的内部会话 id（跨 write 把"一件事"归到一起）。
-        # 只数 user 侧记忆（与 rolling summary 只数 pending_user_count 一致）——
-        # agent 侧记忆若参与计数会把 episode 提前撑到上限、切得过碎，白付摘要的 token。
-        episode_id = await self._resolve_episode_id(
-            request, _count_user_owned(new_memories_meta)
-        )
-        session_episode_id = self._session_episode_id(request)
-        if session_episode_id:
-            episode_id = session_episode_id
         # 关系图用：收集本次落库的 (node, op)，供 graph 投影建边。
         # 收 op 是为了拿 op.related（LLM 标注的 typed 关系）。
         graph_payload: List[Tuple[Any, Any]] = []
@@ -1292,7 +1301,32 @@ class MemoryWriter(WritePipeline):
         )
 
         if not recon_result.success:
-            return [], recon_result.error, {"add": 0, "supersede": 0, "update": 0, "total": 0}, {"prompt": 0, "completion": 0, "total": 0}
+            # reconcile 失败：本次一条新记忆都不落库（不做 ADD-all 兜底），由调用方重跑。
+            # episode 状态也还没推进，重跑不会把同一批记忆重复计数。
+            error = ReconcileFailure(
+                recon_result.error or "reconcile failed",
+                code=recon_result.error_code or "RECONCILE_FAILED",
+            )
+            logger.warning(
+                f"TRACE_PERF [{req_id}] S1_RECONCILE_FAILED "
+                f"code={error.code} candidates={len(new_memory_texts)} stored=0"
+            )
+            return [], error, {"add": 0, "supersede": 0, "update": 0, "total": 0}, {
+                "prompt": recon_result.prompt_tokens,
+                "completion": recon_result.completion_tokens,
+                "total": recon_result.total_tokens,
+            }
+
+        # Episode：本次写入归属的内部会话 id（跨 write 把"一件事"归到一起）。
+        # 只数 user 侧记忆（与 rolling summary 只数 pending_user_count 一致）——
+        # agent 侧记忆若参与计数会把 episode 提前撑到上限、切得过碎，白付摘要的 token。
+        # 放在 reconcile 成功之后：失败的写入不能推进 episode 计数。
+        episode_id = await self._resolve_episode_id(
+            request, _count_user_owned(new_memories_meta)
+        )
+        session_episode_id = self._session_episode_id(request)
+        if session_episode_id:
+            episode_id = session_episode_id
 
         # 分类统计
         _op_counts = {}
@@ -1303,16 +1337,7 @@ class MemoryWriter(WritePipeline):
         logger.info(
             f"TRACE_PERF [{req_id}] S1_RECONCILE_DONE "
             f"ops={len(recon_result.ops)} candidates={len(new_memory_texts)} | {_op_counts_str}"
-            + (f" | DEGRADED({recon_result.degraded_reason})"
-               if getattr(recon_result, "degraded", False) else "")
         )
-        if getattr(recon_result, "degraded", False):
-            # 走了 ADD-all 兜底：内容保住了，但没做去重/演化判定。必须可观测，
-            # 否则线上只会看到"记忆变多了"而不知道为什么。
-            logger.warning(
-                f"[write] reconcile degraded → ADD-all "
-                f"({recon_result.degraded_reason}), {len(recon_result.ops)} memories stored as-is"
-            )
         # 逐条 op 详情由 reconciler 的 "[reconciler] ops detail" 单条 JSON list 输出，
         # 这里不再逐条打印（避免重复刷屏）。
 
@@ -2502,12 +2527,10 @@ class MemoryWriter(WritePipeline):
             response.extra["extract_tokens"] = {"prompt": 0, "completion": 0, "total": 0}
 
             if recon_error is not None:
-                response.success = False
-                response.error_code = 502
-                response.error_message = f"[RECONCILE_FAILED] {recon_error}"
-                response.extra["agent_status"] = "failed"
-                response.extra["agent_error"] = recon_error
-                response.extra["agent_nodes"] = 0
+                # 与 write() 一致：reconcile 失败不落任何记忆，报失败供调用方重跑。
+                self._mark_reconcile_failure(response, recon_error)
+                response.extra["agent_mode"] = "extracted"
+                logger.warning(f"[write_extracted] reconcile failed: {recon_error}")
                 return response
 
             response.success = True
@@ -3526,12 +3549,11 @@ class MemoryWriter(WritePipeline):
                 response.extra["reconcile_ops"] = ops_counts
                 response.extra["reconcile_tokens"] = recon_tokens
                 if recon_error is not None:
+                    # stored_ids 为空：reconcile 失败时一条新记忆都不落库，write()
+                    # 随后回滚 L1_RAW（retry_safe=True），换个 request_id 重跑即可。
                     response.extra["agent_stored_ids"] = stored_ids
-                    self._mark_agent_failure(
-                        response,
-                        error_code="RECONCILE_FAILED",
-                        error_message=recon_error,
-                        agent_nodes=len(stored_ids),
+                    self._mark_reconcile_failure(
+                        response, recon_error, agent_nodes=len(stored_ids),
                     )
                     logger.warning(f"[write] reconcile failed: {recon_error}")
                     return
@@ -3654,6 +3676,29 @@ class MemoryWriter(WritePipeline):
         response.error_code = 502
         response.error_message = f"[{code}] {message}"
 
+    @classmethod
+    def _mark_reconcile_failure(
+        cls,
+        response: WriteResponse,
+        recon_error: str,
+        *,
+        agent_nodes: int = 0,
+    ) -> None:
+        """reconcile 失败：agent_error_code 恒为 RECONCILE_FAILED，具体原因
+        （LLM_UNAVAILABLE / EMPTY_RESPONSE / JSON_PARSE_FAILED / RECONCILE_EXCEPTION）
+        放在 reconcile_error_code。"""
+        reason = getattr(recon_error, "code", "") or "RECONCILE_FAILED"
+        response.extra["reconcile_error_code"] = reason
+        cls._mark_agent_failure(
+            response,
+            error_code="RECONCILE_FAILED",
+            error_message=(
+                f"{reason}: {recon_error}"
+                if reason != "RECONCILE_FAILED" else str(recon_error)
+            ),
+            agent_nodes=agent_nodes,
+        )
+
     async def _handle_agent_failure(self, request, response, agent_result, tracer_span, extract_timing: Optional[Dict[str, Any]] = None) -> None:
         """处理 agent extract 失败的情况。"""
         if agent_result is None:

memhub/MEMORY.md

@@ -137,6 +137,15 @@ memhub profile
 `user-profile` / `memhub profile` 调用 SDK `get_user_profile()`，返回组装后的
 用户长期画像，不通过普通 Search 拼装。
 
+读接口都回显 `user_id`（实际读的用户，未指定时为 `local`）：
+`GET /api/v2/memory-library`、`/memory-library/layers`、`/user-profile`、
+`/user-profile/versions`、`/home-summary`、`/memories/graph`、`/raw`，
+`POST /api/v2/context/search`、`/api/v1/recall`、`/api/v2/memories/ask`；
+`/memories/ask/stream` 写在第一个 `recall` 事件上。
+`DELETE /api/v2/memories/{id}` 只在删掉调用者自己的记忆时回 204；另一个用户的
+记忆和不存在的 ID 一律回 404 `memory_not_found`（不暴露是否存在），调用方按
+「已不存在」处理。
+
 返回值：
 
 ```python

memhub/README.md

@@ -18,13 +18,13 @@ If you run into a problem, please open an Issue with the version, platform,repro
 
 ## 发行与平台合同
 
-源码当前固定使用公开 PyPI 正式版 `hy-memory==2.0.10`。MemHub 源码版本为 `1.0.5`
-（build 36），GitHub 仓库为
+源码当前固定使用公开 PyPI 正式版 `hy-memory==2.0.13`。MemHub 源码版本为 `1.0.6`
+（build 39），GitHub 仓库为
 [`Tencent-Hunyuan/Hy-Memory`](https://github.com/Tencent-Hunyuan/Hy-Memory)，npm 包名为
 `memhub-cli`。当前代码架构见
 [`docs/ARCHITECTURE.md`](docs/ARCHITECTURE.md)。
 
-`v1.0.5` 的发行目标是 Linux x64/arm64 Runtime 与 macOS arm64 App 和 Runtime。
+`v1.0.6` 的发行目标是 Linux x64/arm64 Runtime 与 macOS arm64 App 和 Runtime。
 Linux 制品由 GitHub Actions 在原生架构 runner 上构建并完成生命周期验收；macOS
 制品由发行流水线完成 Developer ID 签名、公证和验收后手动上传。Windows 不支持。
 只有同时出现在 GitHub Release 与 `release-manifest.json` 中、且通过公开校验的制品才属于
@@ -118,7 +118,7 @@ MemHub 的 SQLite 数据默认位于 `~/.one-memory`，不在 npm 包或 Runtime
 
 ## Hy Memory
 
-SDK 依赖固定为公开 PyPI 正式版 `hy-memory==2.0.10`。SDK 配置、权限边界及 search
+SDK 依赖固定为公开 PyPI 正式版 `hy-memory==2.0.13`。SDK 配置、权限边界及 search
 返回格式见 [`MEMORY.md`](MEMORY.md)。HY search 返回的 `content` 已包含 SDK 统一生成的
 逻辑时间和演化上下文；调用方不应再次转换时间戳或重复拼接 `When`。
 

memhub/SBOM.spdx.json

@@ -2352,7 +2352,7 @@
     {
       "SPDXID": "SPDXRef-Package-hy-memory",
       "name": "hy-memory",
-      "versionInfo": "2.0.10",
+      "versionInfo": "2.0.13",
       "downloadLocation": "NOASSERTION",
       "filesAnalyzed": false,
       "licenseConcluded": "Apache-2.0",

memhub/THIRD_PARTY_NOTICES.md

@@ -9,7 +9,7 @@ Per-package license texts are not reproduced here yet; the license
 column is filled in as part of release review, and the SBOM records
 `NOASSERTION` until then rather than guessing.
 
-## hy-memory 2.0.10
+## hy-memory 2.0.13
 
 License: Apache-2.0
 

memhub/apps/cli/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@one-memory/cli",
-  "version": "1.0.5",
+  "version": "1.0.6",
   "description": "MemHub bootstrap CLI for installing and managing the local-first shared memory runtime",
   "license": "Apache-2.0",
   "repository": {

memhub/apps/cli/src/cli.ts

@@ -203,6 +203,13 @@ import {
   renderFeaturesText,
   runFeaturesCommand,
 } from "./memory-features-flow.js";
+import {
+  type LanguageDocument,
+  languageExitCode,
+  parseLanguageCommand,
+  renderLanguageText,
+  runLanguageCommand,
+} from "./memory-language-flow.js";
 import {
   type EvolveDocument,
   evolveExitCode,
@@ -1931,7 +1938,7 @@ async function runCommand(
       return reject(
         descriptor,
         asJson,
-        "--user-id 和 --root 只能用于接入单个 hermes 来源（Hermes profile），用户 ID 只能是 1–64 位字母、数字、点、下划线或连字符。",
+        "--user-id 和 --root 只能用于接入单个 hermes 来源（Hermes profile），用户 ID 只能是 1–64 位字母、数字、点、下划线或连字符。用户 ID 不必等于 Hermes profile 名，例如 --user-id wife-work --root ~/.hermes/profiles/wife:work。",
       );
     }
     if (!parsed) return usage();
@@ -2321,29 +2328,41 @@ async function runCommand(
               ...userIdParameters(userId),
             }),
           );
+    // A delete answered 404 `memory_not_found` is already gone (deleted
+    // before, or never this user's): what was asked for holds, so it exits 0
+    // as committed and says so, instead of failing a retry or a double run.
+    const alreadyGone =
+      parsed.kind === "delete" &&
+      outcome.state === "rejected" &&
+      outcome.code === "memory_not_found";
+    const state = alreadyGone ? "committed" : outcome.state;
     const document = {
       schema_version: 2,
       product: PRODUCT,
       command: `memories ${parsed.kind}`,
-      state: outcome.state,
+      state,
       operation: parsed.kind,
       memory_id: parsed.memoryId,
-      ...(outcome.state === "committed"
-        ? parsed.kind === "update"
-          ? { result: outcome.data }
-          : {}
-        : { code: outcome.code }),
+      ...(alreadyGone
+        ? { already_gone: true }
+        : outcome.state === "committed"
+          ? parsed.kind === "update"
+            ? { result: outcome.data }
+            : {}
+          : { code: outcome.code }),
     };
     emit(
       asJson
         ? `${JSON.stringify(document)}\n`
-        : outcome.state === "committed"
-          ? `已${parsed.kind === "update" ? "更新" : "删除"}记忆 ${parsed.memoryId}\n`
-          : outcome.code === "memory_id_ambiguous"
-            ? "这个 ID 同时存在于多个场景；请加 --kind（以及 --variant）指明是哪一条。\n"
-            : `操作失败：${outcome.code}\n`,
+        : alreadyGone
+          ? `未找到记忆 ${parsed.memoryId}（可能已删除），无需再删。\n`
+          : outcome.state === "committed"
+            ? `已${parsed.kind === "update" ? "更新" : "删除"}记忆 ${parsed.memoryId}\n`
+            : outcome.code === "memory_id_ambiguous"
+              ? "这个 ID 同时存在于多个场景；请加 --kind（以及 --variant）指明是哪一条。\n"
+              : `操作失败：${outcome.code}\n`,
     );
-    return outcome.state === "committed" ? EXIT_OK : EXIT_FAILED;
+    return state === "committed" ? EXIT_OK : EXIT_FAILED;
   }
   if (
     named === "settings" &&
@@ -2379,6 +2398,40 @@ async function runCommand(
     );
     return featuresExitCode(document);
   }
+  if (
+    named === "settings" &&
+    arguments_.slice(1).find((value) => value !== "--json") === "language"
+  ) {
+    const parsed = parseLanguageCommand(
+      arguments_
+        .slice(1)
+        .filter((value, index, all) => index !== all.indexOf("language")),
+    );
+    if (!parsed) return usage();
+    const connected = await connectRuntime(environment);
+    if (!connected.ok) {
+      const document: LanguageDocument = {
+        schema_version: 1,
+        product: PRODUCT,
+        command: "settings language",
+        state: "unavailable",
+        code: connected.code,
+      };
+      emit(
+        asJson ? `${JSON.stringify(document)}\n` : renderLanguageText(document),
+      );
+      return connected.exitCode;
+    }
+    const document = await runLanguageCommand(
+      parsed,
+      connected.reader,
+      connected.operations,
+    );
+    emit(
+      asJson ? `${JSON.stringify(document)}\n` : renderLanguageText(document),
+    );
+    return languageExitCode(document);
+  }
   if (named === "settings") {
     const parsed = parseSettingsCommand(arguments_.slice(1));
     if (!parsed) return usage();
@@ -4330,6 +4383,10 @@ function renderWriteReceiptText(receipt: MemoryWriteReceipt): string {
     ...(receipt.memory_ids && receipt.memory_ids.length > 0
       ? [`memory_ids: ${receipt.memory_ids.join(",")}`]
       : []),
+    ...(receipt.error_code ? [`error_code: ${receipt.error_code}`] : []),
+    ...(receipt.next_retry_at
+      ? [`next_retry_at: ${receipt.next_retry_at}`]
+      : []),
     "",
   ].join("\n");
 }

memhub/apps/cli/src/command-catalog.ts

@@ -258,7 +258,7 @@ export const COMMANDS: readonly CommandDescriptor[] = [
   {
     name: "sources",
     summary:
-      "列出来源，直接接入来源，或按 request id 查接入回执。connect 不加 --import 只授权（处理保持冻结：不导入历史、不扫描新会话）；加 --import 同时导入历史并开启持续同步，返回 request id。目录来自环境变量覆盖的来源必须加 --confirm-overrides。Hermes 的每个 profile 是一个独立用户：用 --user-id 和 --root 接入，授权并导入历史（会自动排除 ~/.hermes/profiles/**，各用户互不读取）。",
+      "列出来源，直接接入来源，或按 request id 查接入回执。connect 不加 --import 只授权（处理保持冻结：不导入历史、不扫描新会话）；加 --import 同时导入历史并开启持续同步，返回 request id。目录来自环境变量覆盖的来源必须加 --confirm-overrides。Hermes 的每个 profile 是一个独立用户：用 --user-id 和 --root 接入，授权并导入历史（任何层级的 profiles/ 目录都会被排除，各用户互不读取）。--root 不能是 profiles 目录本身，也不能与另一个用户的 Hermes 目录相同或互相包含（~/.hermes 与 ~/.hermes/profiles/<name> 除外）。",
     usage:
       "memhub sources list [--json]\n            memhub sources connect <id> [<id> ...] [--import] [--confirm-overrides] [--request-id <uuid>] [--json]\n            memhub sources connect hermes --user-id <id> --root <path> [--import] [--request-id <uuid>] [--json]\n            memhub sources connect --all-detected [--import] [--confirm-overrides] [--json]\n            memhub sources receipt <request-id> [--json]",
     options: [
@@ -270,7 +270,7 @@ export const COMMANDS: readonly CommandDescriptor[] = [
       {
         flag: "--user-id <id>",
         summary:
-          "只用于 hermes：这条接入属于哪个用户（默认 local）。和 --root 一起接入一个 Hermes profile，例如 --user-id wife --root ~/.hermes/profiles/wife；其他来源只能是 local。",
+          "只用于 hermes：这条接入属于哪个用户（默认 local）。和 --root 一起接入一个 Hermes profile，例如 --user-id wife --root ~/.hermes/profiles/wife；用户 ID 不必等于 profile 名，例如 --user-id wife-work --root ~/.hermes/profiles/wife:work。其他来源只能是 local。",
       },
       {
         flag: "--root <path>",
@@ -397,7 +397,7 @@ export const COMMANDS: readonly CommandDescriptor[] = [
   {
     name: "memories",
     summary:
-      "列出、搜索、查看、添加、修改或物理删除记忆（对话、工作、编码三个场景）。add 和 App 的「添加记忆」是同一个入口；delete 不可逆，需 --yes。",
+      "列出、搜索、查看、添加、修改或物理删除记忆（对话、工作、编码三个场景）。add 和 App 的「添加记忆」是同一个入口；delete 不可逆，需 --yes；要删的记忆已不存在（或不属于该用户）时提示未找到，按已删除处理并退出 0。",
     usage:
       "memhub memories list [--scene <all|chat|working|coding>] [--source <id>] [--query <text>] [--status <state>] [--offset <n>] [--limit <n>] [--user-id <id>] [--json]\n            memhub memories show <memory-id> [--kind <kind>] [--variant <variant>] [--user-id <id>] [--json]\n            memhub memories add <text> [--request-id <uuid>] [--user-id <id>] [--json]\n            memhub memories add --content-file <path> [--request-id <uuid>] [--user-id <id>] [--json]\n            memhub memories add-status <request-id> [--user-id <id>] [--json]\n            memhub memories update <memory-id> --content-file <path> [--kind <kind>] [--variant <variant>] [--task <text>] [--user-id <id>] [--json]\n            memhub memories delete <memory-id> [--kind <kind>] [--variant <variant>] [--yes] [--user-id <id>] [--json]",
     options: [
@@ -461,12 +461,14 @@ export const COMMANDS: readonly CommandDescriptor[] = [
   {
     name: "settings",
     summary:
-      "查看或切换记忆模式（lite / pro / ultra）。lite 不调用模型，只在原始对话里检索；pro 由模型提取记忆（System 1）；ultra 在 pro 之上每晚自动进化（System 2，使用知识图谱）。任何模式都保留全部原始对话。切换不迁移数据：已处理的不会重做，排队中的和新的按新模式处理；需 --yes，不加时只显示计划。环境变量 ONE_MEMORY_GRAPH_STORE 会强制 ultra。settings features 查看或开关 SDK 的可选检索与提取功能（全局设置，默认全部保持 SDK 默认值）：graph_rerank 图谱重排（仅 ultra）、same_series_timeline 同系列时间线（需 graph_rerank）、episode_recall 片段召回（pro / ultra，需先开 session_episodes 写入片段）、session_episodes 片段写入、episode_summary 片段摘要（每个片段一次模型调用）、intention 意图提取（默认开）、few_shot 提取示例；set 需 --yes，不加时只显示计划；reset 恢复默认值。",
+      "查看或切换记忆模式（lite / pro / ultra）。lite 不调用模型，只在原始对话里检索；pro 由模型提取记忆（System 1）；ultra 在 pro 之上每晚自动进化（System 2，使用知识图谱）。任何模式都保留全部原始对话。切换不迁移数据：已处理的不会重做，排队中的和新的按新模式处理；需 --yes，不加时只显示计划。环境变量 ONE_MEMORY_GRAPH_STORE 会强制 ultra。settings features 查看或开关 SDK 的可选检索与提取功能（全局设置，默认全部保持 SDK 默认值）：graph_rerank 图谱重排（仅 ultra）、same_series_timeline 同系列时间线（需 graph_rerank）、episode_recall 片段召回（pro / ultra，需先开 session_episodes 写入片段）、session_episodes 片段写入、episode_summary 片段摘要（每个片段一次模型调用）、intention 意图提取（默认开）、intention_dedup 意图判重（默认开；关闭则检索与写入都不判重、不删除意图）、few_shot 提取示例，以及数值 intention_dedup_threshold 意图判重阈值（默认 0.95，可设 0.8–1.0）；set 需 --yes，不加时只显示计划；reset 恢复默认值。settings language 查看或设置界面语言（App 切换语言时会自动设置）：简体中文（zh-Hans）和 system 不指定 SDK 语言，SDK 照旧自动识别中文或英文；其余语言（en、zh-Hant、ja、es、de、pt、fr、ko、ru、id）会让提取等 SDK 提示使用该语言，立即生效。",
     usage:
       "memhub settings mode [lite|pro|ultra] [--yes] [--json]\n" +
       "            memhub settings features [--json]\n" +
       "            memhub settings features set <name>=<true|false> [...] [--yes] [--json]\n" +
-      "            memhub settings features reset [<name> ...] [--json]",
+      "            memhub settings features set intention_dedup_threshold=<0.8-1.0> [--yes] [--json]\n" +
+      "            memhub settings features reset [<name> ...] [--json]\n" +
+      "            memhub settings language [<code>|system] [--json]",
     options: [
       {
         flag: "mode [lite|pro|ultra]",
@@ -475,12 +477,17 @@ export const COMMANDS: readonly CommandDescriptor[] = [
       {
         flag: "features set <name>=<true|false>",
         summary:
-          "开关一个或多个 SDK 功能；功能在当前模式下不生效时会注明原因（例如 graph_rerank 需要 ultra）。",
+          "开关一个或多个 SDK 功能；功能在当前模式下不生效时会注明原因（例如 graph_rerank 需要 ultra）。intention_dedup_threshold 取 0.8–1.0 的数值。",
       },
       {
         flag: "features reset [<name> ...]",
         summary: "把指定功能（不写则全部）恢复为 SDK 默认值。",
       },
+      {
+        flag: "language [<code>|system]",
+        summary:
+          "不带参数显示界面语言和 SDK 提示语言；带语言代码（en、zh-Hans、zh-Hant、ja、es、de、pt、fr、ko、ru、id）或 system 时设置。",
+      },
       CONFIRM_OPTION,
       JSON_OPTION,
     ],

memhub/apps/cli/src/core-client.ts

@@ -17,12 +17,16 @@ const READ_ONLY_PATHS = [
   "/api/v1/model-profiles",
   "/api/v1/source-grants",
   "/api/v1/sources",
+  "/api/v2/home-projection",
   "/api/v2/home-summary",
+  "/api/v2/raw",
   "/api/v2/memory-library",
   "/api/v2/user-profile",
   "/api/v2/user-profile/versions",
   "/api/v1/settings/memory-mode",
+  "/api/v1/settings/memory-mode/plan",
   "/api/v1/settings/memory-features",
+  "/api/v1/settings/ui-language",
   "/api/v2/evolve",
 ] as const;
 /** One evolve run's receipt (`memhub evolve --wait`). */
@@ -267,6 +271,11 @@ export interface MemoryWriteReceipt {
   detail?: string;
   raw_ids?: string[];
   memory_ids?: string[];
+  /** Stable code of the last failure while the write still waits; null when
+   * none. Optional so older Runtimes stay readable. */
+  error_code?: string | null;
+  /** When Core will try this write again (ISO); null when not scheduled. */
+  next_retry_at?: string | null;
 }
 
 export interface OpenAIMessage {

memhub/apps/cli/src/core-operations.ts

@@ -31,6 +31,8 @@ const EVOLVE_PATH = "/api/v2/evolve";
 const MEMORY_MODE_PATH = "/api/v1/settings/memory-mode";
 /** `memhub settings features set|reset` sets the SDK features. */
 const MEMORY_FEATURES_PATH = "/api/v1/settings/memory-features";
+/** `memhub settings language <code>` sets the display language Core uses. */
+const UI_LANGUAGE_PATH = "/api/v1/settings/ui-language";
 const ONBOARDING_COMPLETE_PATH = "/api/v1/onboarding/complete";
 const EMBEDDING_SWITCH_PATHS = [
   "/api/v1/embedding-switches",
@@ -165,6 +167,7 @@ export function createCoreOperations(attachment: {
       if (
         path !== MEMORY_MODE_PATH &&
         path !== MEMORY_FEATURES_PATH &&
+        path !== UI_LANGUAGE_PATH &&
         (!SDK_MEMORY_PATH.test(path) || path.includes("?"))
       ) {
         throw new Error("core_operation_path_not_allowed");

memhub/apps/cli/src/core-responses.ts

@@ -1,4 +1,5 @@
 import type {
+  HomeProjectionV1,
   ImportIssue,
   ImportJob,
   LiveSyncHealth,
@@ -26,6 +27,9 @@ export const MEMORY_STATUSES = [
 const ID_MAX = 128;
 const LABEL_MAX = 256;
 const LIST_MAX = 500;
+const USER_ID = /^[A-Za-z0-9._-]{1,64}$/;
+const ISO_TIME =
+  /^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}(?:\.\d+)?(?:Z|[+-]\d{2}:\d{2})$/;
 const LIVE_SYNC_STATES = [
   "idle",
   "running",
@@ -406,6 +410,153 @@ export function validateHomeSummary(value: unknown): SdkHomeSummary | null {
   return summary as unknown as SdkHomeSummary;
 }
 
+/** `GET /api/v2/home-projection`: the mode-aware home content plane. */
+export function validateHomeProjection(
+  value: unknown,
+): HomeProjectionV1 | null {
+  const projection = exactRecord(value, [
+    "projection_version",
+    "user_id",
+    "effective_mode",
+    "capabilities",
+    "visible_count",
+    "display_state",
+    "latest",
+    "observed_at",
+  ]);
+  if (!projection) return null;
+  const mode = projection.effective_mode;
+  const capabilities = exactRecord(projection.capabilities, [
+    "content_plane",
+    "generation_required",
+    "graph_enabled",
+    "evolve_available",
+  ]);
+  if (
+    projection.projection_version !== 1 ||
+    typeof projection.user_id !== "string" ||
+    !USER_ID.test(projection.user_id) ||
+    !oneOf(mode, ["lite", "pro", "ultra"] as const) ||
+    !capabilities ||
+    capabilities.content_plane !== (mode === "lite" ? "raw" : "memory") ||
+    capabilities.generation_required !== (mode !== "lite") ||
+    capabilities.graph_enabled !== (mode === "ultra") ||
+    capabilities.evolve_available !== (mode === "ultra") ||
+    count(projection.visible_count) === null ||
+    !oneOf(projection.display_state, [
+      "empty",
+      "excerpt",
+      "no_user_excerpt",
+      "no_displayable_memory",
+    ] as const) ||
+    !isoTime(projection.observed_at) ||
+    !validProjectionLatest(projection.latest, mode)
+  ) {
+    return null;
+  }
+  const visible = projection.visible_count as number;
+  const latest = projection.latest as Record<string, unknown> | null;
+  if (
+    (visible === 0 &&
+      (latest !== null || projection.display_state !== "empty")) ||
+    (visible > 0 && projection.display_state === "empty") ||
+    (latest === null &&
+      ["excerpt", "no_user_excerpt"].includes(
+        projection.display_state as string,
+      )) ||
+    (latest?.type === "raw" &&
+      projection.display_state !== latest.display_state) ||
+    (latest?.type === "memory" && projection.display_state !== "excerpt")
+  ) {
+    return null;
+  }
+  return projection as unknown as HomeProjectionV1;
+}
+
+function validProjectionLatest(
+  value: unknown,
+  mode: "lite" | "pro" | "ultra",
+): boolean {
+  if (value === null) return true;
+  const base = [
+    "type",
+    "time",
+    "time_basis",
+    "excerpt",
+    "truncated",
+    "source_id",
+  ];
+  const candidate = record(value);
+  if (!candidate) return false;
+  const keys =
+    candidate.type === "raw"
+      ? [...base, "raw_id", "session_id", "display_state"]
+      : [...base, "memory_id", "scene", "kind", "variant"];
+  const latest = exactRecord(value, keys);
+  if (
+    !latest ||
+    !(latest.time === null || isoTime(latest.time)) ||
+    ![null, "conversation", "import", "write", "update"].includes(
+      latest.time_basis as null | string,
+    ) ||
+    text(latest.excerpt, 200) === null ||
+    typeof latest.truncated !== "boolean" ||
+    text(latest.source_id, ID_MAX) === null
+  ) {
+    return false;
+  }
+  if (latest.type === "raw") {
+    return (
+      mode === "lite" &&
+      nonemptyText(latest.raw_id, ID_MAX) &&
+      nonemptyText(latest.session_id, LABEL_MAX) &&
+      oneOf(latest.display_state, ["excerpt", "no_user_excerpt"] as const) &&
+      (latest.display_state !== "no_user_excerpt" ||
+        (latest.excerpt === "" && latest.truncated === false))
+    );
+  }
+  return (
+    latest.type === "memory" &&
+    mode !== "lite" &&
+    nonemptyText(latest.memory_id, ID_MAX) &&
+    oneOf(latest.scene, ["chat", "working", "coding"] as const) &&
+    oneOf(latest.kind, ["chat", "experience"] as const) &&
+    [null, "working", "coding"].includes(latest.variant as null | string) &&
+    ((latest.kind === "chat" &&
+      latest.scene === "chat" &&
+      latest.variant === null) ||
+      (latest.kind === "experience" &&
+        latest.scene === latest.variant &&
+        oneOf(latest.scene, ["working", "coding"] as const)))
+  );
+}
+
+/** The bounded `/api/v2/raw?limit=1` envelope used only for its real total. */
+export function validateRawTotal(value: unknown): number | null {
+  const page = exactRecord(value, [
+    "user_id",
+    "items",
+    "total",
+    "offset",
+    "limit",
+    "time_filtered",
+  ]);
+  if (
+    !page ||
+    typeof page.user_id !== "string" ||
+    !USER_ID.test(page.user_id) ||
+    !Array.isArray(page.items) ||
+    page.items.length > 1 ||
+    count(page.total) === null ||
+    page.offset !== 0 ||
+    page.limit !== 1 ||
+    page.time_filtered !== false
+  ) {
+    return null;
+  }
+  return page.total as number;
+}
+
 function identifiers(value: unknown): string[] | null {
   return list(value ?? [], (item) => text(item, ID_MAX));
 }
@@ -430,6 +581,30 @@ function record(value: unknown): Record<string, unknown> | null {
     : null;
 }
 
+function exactRecord(
+  value: unknown,
+  keys: readonly string[],
+): Record<string, unknown> | null {
+  const item = record(value);
+  return item &&
+    Object.keys(item).length === keys.length &&
+    keys.every((key) => Object.hasOwn(item, key))
+    ? item
+    : null;
+}
+
+function isoTime(value: unknown): value is string {
+  return (
+    typeof value === "string" &&
+    ISO_TIME.test(value) &&
+    Number.isFinite(Date.parse(value))
+  );
+}
+
+function nonemptyText(value: unknown, max: number): value is string {
+  return typeof value === "string" && value.length > 0 && value.length <= max;
+}
+
 function text(value: unknown, max: number): string | null {
   return typeof value === "string" && value.length <= max ? value : null;
 }

memhub/apps/cli/src/embedding-switch-cli.test.ts

@@ -250,6 +250,20 @@ describe("models activate with an embedding change", () => {
       code: "embedding_switch_required",
     });
   });
+
+  it("does not treat a domain 404 as an old-Core route miss", async () => {
+    transport.post.mockResolvedValue({
+      status: 404,
+      data: { detail: "embedding_switch_not_found" },
+    });
+    const result = await capturedRun(["models", "activate", PROFILE, "--json"]);
+    expect(result.code).toBe(1);
+    expect(
+      transport.post.mock.calls.some(([url]) =>
+        String(url).endsWith("/activate"),
+      ),
+    ).toBe(false);
+  });
 });
 
 describe("models switch and spaces", () => {

memhub/apps/cli/src/embedding-switch-flow.ts

@@ -9,6 +9,7 @@
  * makes it live. The CLI shows the plan, asks, starts the job and follows it.
  */
 
+import { isBareNotFound } from "@one-memory/operations";
 import type { CoreReader } from "./core-client.js";
 import type {
   CoreDeleteOperations,
@@ -387,7 +388,11 @@ async function requestPlan(
   }
   if (outcome.state === "rejected") {
     // A Core before the registry has no plan route: activation as before.
-    if (outcome.http_status === 404 && outcome.code === "http_404") {
+    if (
+      outcome.http_status === 404 &&
+      outcome.code === "http_404" &&
+      isBareNotFound(outcome.body)
+    ) {
       return { state: "unsupported" };
     }
     const plan = parsePlan(record(outcome.body)?.plan);

memhub/apps/cli/src/headless-flows.ts

@@ -348,12 +348,25 @@ export function parseApiKey(bytes: Buffer | null): string | undefined {
   return value;
 }
 
+/** What to do about a refusal whose code alone does not say. */
+const FLOW_CODE_HINTS: Record<string, string> = {
+  hermes_root_is_profiles_container:
+    "--root 指向的是 profiles 目录本身；请指向其中一个 profile，例如 ~/.hermes/profiles/wife。",
+  hermes_root_overlaps_other_user:
+    "--root 与另一个用户已接入的 Hermes 目录相同或互相包含，会读到对方的记录；请换一个目录，或先撤销对方的接入。~/.hermes 与 ~/.hermes/profiles/<name> 可以分属两个用户。",
+};
+
 export function renderFlowText(document: FlowDocument): string {
   const lines = [
     `操作状态：${document.state}`,
     `操作 ID：${document.operation_id ?? "无"}`,
     "code" in document ? `代码：${document.code}` : "已返回有界回执。",
   ];
+  const hint =
+    "code" in document && typeof document.code === "string"
+      ? FLOW_CODE_HINTS[document.code]
+      : undefined;
+  if (hint) lines.push(hint);
   // A partial success or an all-rejected batch must name each source that was
   // not accepted; a bare "partial" leaves the user with nothing to act on.
   if (

memhub/apps/cli/src/memories-cli.test.ts

@@ -233,6 +233,31 @@ describe("memories add-status", () => {
     });
   });
 
+  it("passes the retry code and time of an addition still waiting", async () => {
+    transport.get.mockResolvedValue({
+      status: 200,
+      data: {
+        ...addReceipt("pending"),
+        error_code: "model_auth_failed",
+        next_retry_at: "2026-11-02T10:00:00+00:00",
+      },
+    });
+    const json = await capturedRun([
+      "memories",
+      "add-status",
+      REQUEST,
+      "--json",
+    ]);
+    expect(JSON.parse(json.stdout).receipt).toMatchObject({
+      state: "pending",
+      error_code: "model_auth_failed",
+      next_retry_at: "2026-11-02T10:00:00+00:00",
+    });
+    const text = await capturedRun(["memories", "add-status", REQUEST]);
+    expect(text.stdout).toContain("error_code: model_auth_failed");
+    expect(text.stdout).toContain("next_retry_at: 2026-11-02T10:00:00+00:00");
+  });
+
   it("reports an unknown request id as not_found, exit 1", async () => {
     transport.get.mockResolvedValue({
       status: 404,
@@ -366,6 +391,33 @@ describe("memories update / delete pass the namespace", () => {
     );
   });
 
+  it("reports a delete answered 404 as already gone and exits 0", async () => {
+    transport.delete.mockResolvedValue({
+      status: 404,
+      data: { detail: "memory_not_found" },
+    });
+    const json = await capturedRun([
+      "memories",
+      "delete",
+      "gone-1",
+      "--yes",
+      "--json",
+    ]);
+    expect(json.code).toBe(0);
+    expect(JSON.parse(json.stdout)).toEqual({
+      schema_version: 2,
+      product: expect.any(String),
+      command: "memories delete",
+      state: "committed",
+      operation: "delete",
+      memory_id: "gone-1",
+      already_gone: true,
+    });
+    const text = await capturedRun(["memories", "delete", "gone-1", "--yes"]);
+    expect(text.code).toBe(0);
+    expect(text.stdout).toContain("未找到记忆 gone-1");
+  });
+
   it("explains an ambiguous id instead of a bare code", async () => {
     transport.delete.mockResolvedValue({
       status: 409,

memhub/apps/cli/src/memory-features-cli.test.ts

@@ -36,15 +36,17 @@ const DEFAULTS: Record<string, boolean> = {
   session_episodes: false,
   episode_summary: false,
   intention: true,
+  intention_dedup: true,
   few_shot: false,
 };
+const THRESHOLD_DEFAULT = 0.95;
 
 function featuresState(
-  configured: Record<string, boolean> = {},
+  configured: Record<string, boolean | number> = {},
   mode = "pro",
   extra: Record<string, unknown> = {},
 ) {
-  const nonDefault: Record<string, boolean> = {};
+  const nonDefault: Record<string, boolean | number> = {};
   const features = Object.entries(DEFAULTS).map(([name, fallback]) => {
     const enabled = configured[name] ?? fallback;
     if (enabled !== fallback) nonDefault[name] = enabled;
@@ -70,7 +72,34 @@ function featuresState(
       description: name,
     };
   });
-  return { mode, features, non_default: nonDefault, ...extra };
+  const threshold =
+    (configured.intention_dedup_threshold as number | undefined) ??
+    THRESHOLD_DEFAULT;
+  if (threshold !== THRESHOLD_DEFAULT)
+    nonDefault.intention_dedup_threshold = threshold;
+  const dedupOn =
+    (configured.intention_dedup as boolean | undefined) ??
+    DEFAULTS.intention_dedup;
+  const parameters = [
+    {
+      name: "intention_dedup_threshold",
+      value: threshold,
+      configured:
+        "intention_dedup_threshold" in configured
+          ? configured.intention_dedup_threshold
+          : null,
+      default: THRESHOLD_DEFAULT,
+      minimum: 0.8,
+      maximum: 1,
+      active: dedupOn,
+      reason: dedupOn ? null : "requires_intention_dedup",
+      requires_feature: "intention_dedup",
+      sdk_field: "recall.intention_dedup_threshold",
+      env: "MEMORY_INTENTION_DEDUP_THRESHOLD",
+      description: "threshold",
+    },
+  ];
+  return { mode, features, parameters, non_default: nonDefault, ...extra };
 }
 
 beforeEach(() => {
@@ -110,11 +139,16 @@ describe("memhub settings features", () => {
     expect(result.code).toBe(0);
     const json = JSON.parse(result.stdout);
     expect(json.state).toBe("ok");
-    expect(json.features.features).toHaveLength(7);
+    expect(json.features.features).toHaveLength(8);
+    expect(json.features.parameters[0].name).toBe("intention_dedup_threshold");
     expect(transport.put).not.toHaveBeenCalled();
     const text = (await capturedRun(["settings", "features"])).stdout;
     expect(text).toContain("graph_rerank：关（默认）");
     expect(text).toContain("intention：开（默认）");
+    expect(text).toContain("intention_dedup：开（默认）");
+    expect(text).toContain(
+      "intention_dedup_threshold：0.95（默认，可设 0.8–1）",
+    );
     expect(text).toContain("先开启 session_episodes");
   });
 
@@ -160,6 +194,130 @@ describe("memhub settings features", () => {
     );
   });
 
+  it("turns intention dedup off and sets its threshold, round trip", async () => {
+    transport.put.mockResolvedValueOnce({
+      status: 200,
+      data: featuresState({ intention_dedup: false }, "pro", {
+        changed: ["intention_dedup"],
+      }),
+    });
+    const off = await capturedRun([
+      "settings",
+      "features",
+      "set",
+      "intention_dedup=false",
+      "--yes",
+      "--json",
+    ]);
+    expect(off.code).toBe(0);
+    expect(transport.put).toHaveBeenLastCalledWith(
+      "/api/v1/settings/memory-features",
+      { intention_dedup: false },
+      undefined,
+    );
+    const offJson = JSON.parse(off.stdout);
+    expect(offJson.state).toBe("committed");
+    expect(offJson.changed).toEqual(["intention_dedup"]);
+    expect(offJson.features.parameters[0].reason).toBe(
+      "requires_intention_dedup",
+    );
+
+    transport.get.mockResolvedValue({
+      status: 200,
+      data: featuresState({ intention_dedup: false }),
+    });
+    transport.put.mockResolvedValueOnce({
+      status: 200,
+      data: featuresState(
+        { intention_dedup: true, intention_dedup_threshold: 0.9 },
+        "pro",
+        { changed: ["intention_dedup", "intention_dedup_threshold"] },
+      ),
+    });
+    const on = await capturedRun([
+      "settings",
+      "features",
+      "set",
+      "intention_dedup=true",
+      "intention_dedup_threshold=0.9",
+      "--yes",
+    ]);
+    expect(on.code).toBe(0);
+    expect(transport.put).toHaveBeenLastCalledWith(
+      "/api/v1/settings/memory-features",
+      { intention_dedup: true, intention_dedup_threshold: 0.9 },
+      undefined,
+    );
+    expect(on.stdout).toContain(
+      "已更新：intention_dedup、intention_dedup_threshold",
+    );
+    expect(on.stdout).toContain("intention_dedup_threshold：0.9（已设置");
+
+    transport.get.mockResolvedValue({
+      status: 200,
+      data: featuresState({ intention_dedup_threshold: 0.9 }),
+    });
+    transport.put.mockResolvedValueOnce({
+      status: 200,
+      data: featuresState({}, "pro", {
+        changed: ["intention_dedup_threshold"],
+      }),
+    });
+    const reset = await capturedRun([
+      "settings",
+      "features",
+      "reset",
+      "intention_dedup_threshold",
+    ]);
+    expect(reset.code).toBe(0);
+    expect(transport.put).toHaveBeenLastCalledWith(
+      "/api/v1/settings/memory-features",
+      { intention_dedup_threshold: null },
+      undefined,
+    );
+  });
+
+  it("previews a threshold without --yes and refuses one out of range", async () => {
+    const preview = await capturedRun([
+      "settings",
+      "features",
+      "set",
+      "intention_dedup_threshold=0.85",
+    ]);
+    expect(preview.code).toBe(0);
+    expect(preview.stdout).toContain("- intention_dedup_threshold = 0.85");
+    for (const value of ["0.5", "0.79", "1.01", "2", "-0.9", "abc", "1e0"]) {
+      const result = await capturedRun([
+        "settings",
+        "features",
+        "set",
+        `intention_dedup_threshold=${value}`,
+        "--yes",
+      ]);
+      expect(result.code, value).toBe(2);
+    }
+    expect(transport.put).not.toHaveBeenCalled();
+  });
+
+  it("does not send a threshold to a Runtime that does not list it", async () => {
+    const { parameters: _unused, ...older } = featuresState();
+    transport.get.mockResolvedValue({ status: 200, data: older });
+    const result = await capturedRun([
+      "settings",
+      "features",
+      "set",
+      "intention_dedup_threshold=0.9",
+      "--yes",
+      "--json",
+    ]);
+    expect(result.code).toBe(1);
+    expect(JSON.parse(result.stdout)).toMatchObject({
+      state: "rejected",
+      code: "memory_feature_unsupported",
+    });
+    expect(transport.put).not.toHaveBeenCalled();
+  });
+
   it("does nothing when the values are already set", async () => {
     transport.get.mockResolvedValue({
       status: 200,
@@ -210,6 +368,8 @@ describe("memhub settings features", () => {
       ["settings", "features", "set", "graph_rerank=yes"],
       ["settings", "features", "set", "graph_rerank"],
       ["settings", "features", "set", "few_shot=true", "few_shot=false"],
+      ["settings", "features", "set", "intention_dedup=0.9"],
+      ["settings", "features", "set", "intention_dedup_threshold=true"],
       ["settings", "features", "reset", "nope"],
       ["settings", "features", "toggle"],
     ]) {
@@ -269,7 +429,11 @@ describe("status pipeline features", () => {
         last_evolve_at: null,
         graph_build: { state: "idle", users: {} },
         evolve: { mode: "pro", schedule: null, running: [], users: {} },
-        features: { episode_recall: true, intention: false },
+        features: {
+          episode_recall: true,
+          intention: false,
+          intention_dedup_threshold: 0.9,
+        },
       },
     };
     const report = await composeStatusReport({
@@ -284,9 +448,12 @@ describe("status pipeline features", () => {
     expect(report.pipeline?.features).toEqual({
       episode_recall: true,
       intention: false,
+      intention_dedup_threshold: 0.9,
     });
     const text = renderStatusText(report, "MemHub");
-    expect(text).toContain("SDK 功能：episode_recall=开、intention=关");
+    expect(text).toContain(
+      "SDK 功能：episode_recall=开、intention=关、intention_dedup_threshold=0.9",
+    );
   });
 });
 

memhub/apps/cli/src/memory-features-flow.ts

@@ -2,7 +2,8 @@
  * `memhub settings features [set <name>=<true|false> ... | reset [<name> ...]]`.
  *
  * The SDK's optional retrieval and extraction features (graph rerank, episode
- * recall, the episode write side, intention, few-shot). One global setting in
+ * recall, the episode write side, intention and its dedup, few-shot), plus the
+ * intention dedup threshold, the one numeric setting. One global setting in
  * the Runtime; an unset feature keeps the SDK default, so an install nobody
  * touched behaves as before. `set` prints its plan first and needs `--yes`,
  * like `settings mode`, because some features spend model calls; `reset`
@@ -20,10 +21,19 @@ export const MEMORY_FEATURES = [
   "session_episodes",
   "episode_summary",
   "intention",
+  "intention_dedup",
   "few_shot",
 ] as const;
 export type MemoryFeature = (typeof MEMORY_FEATURES)[number];
 
+/** Numeric settings, with the range the Runtime accepts (inclusive). */
+export const MEMORY_PARAMETERS = {
+  intention_dedup_threshold: { minimum: 0.8, maximum: 1 },
+} as const;
+export type MemoryParameter = keyof typeof MEMORY_PARAMETERS;
+export type MemorySetting = MemoryFeature | MemoryParameter;
+type SettingValues = Partial<Record<MemorySetting, boolean | number>>;
+
 const FEATURE_LABEL: Record<MemoryFeature, string> = {
   graph_rerank: "图谱重排（沿知识图谱的边传播支持度；仅 ultra）",
   same_series_timeline:
@@ -33,6 +43,8 @@ const FEATURE_LABEL: Record<MemoryFeature, string> = {
   session_episodes: "片段写入（同一会话提取的记忆归入同一片段）",
   episode_summary: "片段摘要（片段结束时总结一次；每个片段一次模型调用）",
   intention: "意图提取（随事实一起提取用户的计划与意图）",
+  intention_dedup:
+    "意图判重（检索时把同一天、相似度达到阈值的意图视为重复，只返回最早一条并删除其余；关闭则不判重、不删除）",
   few_shot: "提取示例（在提取提示里附上示例；不加调用，输入更长）",
 };
 
@@ -41,21 +53,42 @@ const REASON_TEXT: Record<string, string> = {
   requires_pro: "lite 模式下不生效（需要 pro 或 ultra）",
   requires_ultra: "当前模式下不生效（需要 ultra）",
   requires_graph_rerank: "需要先开启并生效 graph_rerank",
+  requires_intention_dedup: "intention_dedup 已关闭，阈值不起作用",
+};
+
+const PARAMETER_LABEL: Record<MemoryParameter, string> = {
+  intention_dedup_threshold: "意图判重阈值（余弦相似度，越高保留越多）",
 };
 
 export type FeaturesCommand =
   | { kind: "show" }
   | {
       kind: "set";
-      values: Partial<Record<MemoryFeature, boolean>>;
+      values: SettingValues;
       confirmed: boolean;
     }
-  | { kind: "reset"; names: MemoryFeature[] };
+  | { kind: "reset"; names: MemorySetting[] };
 
 function isFeature(value: string): value is MemoryFeature {
   return (MEMORY_FEATURES as readonly string[]).includes(value);
 }
 
+function isParameter(value: string): value is MemoryParameter {
+  return Object.hasOwn(MEMORY_PARAMETERS, value);
+}
+
+function isSetting(value: string): value is MemorySetting {
+  return isFeature(value) || isParameter(value);
+}
+
+/** A parameter's value: a plain decimal in its range; null = usage. */
+function parameterValue(name: MemoryParameter, raw: string): number | null {
+  if (!/^\d+(\.\d+)?$/.test(raw)) return null;
+  const value = Number(raw);
+  const { minimum, maximum } = MEMORY_PARAMETERS[name];
+  return value >= minimum && value <= maximum ? value : null;
+}
+
 /** Arguments after `settings features`; null = usage. */
 export function parseFeaturesCommand(
   values: readonly string[],
@@ -68,18 +101,28 @@ export function parseFeaturesCommand(
   const positional = tail.filter((value) => value !== "--yes");
   if (verb === "set") {
     if (positional.length === 0) return null;
-    const parsed: Partial<Record<MemoryFeature, boolean>> = {};
+    const parsed: SettingValues = {};
     for (const item of positional) {
-      const match = /^([a-z_]+)=(true|false)$/.exec(item);
-      if (!match || !isFeature(match[1]) || match[1] in parsed) return null;
-      parsed[match[1]] = match[2] === "true";
+      const match = /^([a-z_]+)=(.+)$/.exec(item);
+      if (!match || match[1] in parsed) return null;
+      const [, name, raw] = match;
+      if (isFeature(name)) {
+        if (raw !== "true" && raw !== "false") return null;
+        parsed[name] = raw === "true";
+      } else if (isParameter(name)) {
+        const value = parameterValue(name, raw);
+        if (value === null) return null;
+        parsed[name] = value;
+      } else {
+        return null;
+      }
     }
     return { kind: "set", values: parsed, confirmed: yes === 1 };
   }
   if (verb === "reset") {
     if (new Set(positional).size !== positional.length) return null;
-    if (!positional.every(isFeature)) return null;
-    return { kind: "reset", names: positional as MemoryFeature[] };
+    if (!positional.every(isSetting)) return null;
+    return { kind: "reset", names: positional as MemorySetting[] };
   }
   return null;
 }
@@ -96,11 +139,26 @@ export interface FeatureState {
   description: string;
 }
 
+export interface ParameterState {
+  name: MemoryParameter;
+  value: number;
+  configured: number | null;
+  default: number;
+  minimum: number;
+  maximum: number;
+  active: boolean;
+  reason: string | null;
+  requires_feature: string;
+  description: string;
+}
+
 export interface FeaturesState {
   mode: string;
   features: FeatureState[];
-  non_default: Partial<Record<MemoryFeature, boolean>>;
-  changed?: MemoryFeature[];
+  /** Absent from a Runtime older than the intention dedup threshold. */
+  parameters?: ParameterState[];
+  non_default: SettingValues;
+  changed?: MemorySetting[];
 }
 
 function featuresState(value: unknown): FeaturesState | null {
@@ -125,6 +183,20 @@ function featuresState(value: unknown): FeaturesState | null {
       return null;
     }
   }
+  if (item.parameters !== undefined) {
+    if (!Array.isArray(item.parameters)) return null;
+    for (const parameter of item.parameters) {
+      if (
+        !parameter ||
+        typeof parameter !== "object" ||
+        typeof (parameter as ParameterState).name !== "string" ||
+        typeof (parameter as ParameterState).value !== "number" ||
+        typeof (parameter as ParameterState).active !== "boolean"
+      ) {
+        return null;
+      }
+    }
+  }
   return item as unknown as FeaturesState;
 }
 
@@ -137,12 +209,12 @@ export type FeaturesDocument = {
   | {
       state: "preview";
       features: FeaturesState;
-      target: Partial<Record<MemoryFeature, boolean>>;
+      target: SettingValues;
       applied: false;
       next_step: string;
     }
   | { state: "unchanged"; features: FeaturesState }
-  | { state: "committed"; features: FeaturesState; changed: MemoryFeature[] }
+  | { state: "committed"; features: FeaturesState; changed: MemorySetting[] }
   | { state: "rejected" | "unknown" | "unavailable"; code: string }
 );
 
@@ -170,13 +242,23 @@ export async function runFeaturesCommand(
   if (command.kind === "show") {
     return { ...BASE, state: "ok", features: current };
   }
+  // What a person set, per name this Runtime lists; null = the default.
+  const configured = new Map<string, boolean | number | null>([
+    ...current.features.map(
+      (feature) => [feature.name, feature.configured] as const,
+    ),
+    ...(current.parameters ?? []).map(
+      (parameter) => [parameter.name, parameter.configured] as const,
+    ),
+  ]);
   let body: Record<string, unknown>;
   if (command.kind === "set") {
-    const configured = new Map(
-      current.features.map((feature) => [feature.name, feature.configured]),
-    );
+    if (Object.keys(command.values).some((name) => !configured.has(name))) {
+      // An older Runtime does not know the name; it would answer 422.
+      return { ...BASE, state: "rejected", code: "memory_feature_unsupported" };
+    }
     const differs = Object.entries(command.values).some(
-      ([name, value]) => configured.get(name as MemoryFeature) !== value,
+      ([name, value]) => configured.get(name) !== value,
     );
     if (!differs) return { ...BASE, state: "unchanged", features: current };
     if (!command.confirmed) {
@@ -197,16 +279,10 @@ export async function runFeaturesCommand(
     const names =
       command.names.length > 0
         ? command.names
-        : current.features
-            .filter((feature) => feature.configured !== null)
-            .map((feature) => feature.name);
-    if (
-      names.every(
-        (name) =>
-          current.features.find((feature) => feature.name === name)
-            ?.configured === null,
-      )
-    ) {
+        : [...configured]
+            .filter(([, value]) => value !== null)
+            .map(([name]) => name as MemorySetting);
+    if (names.every((name) => (configured.get(name) ?? null) === null)) {
       return { ...BASE, state: "unchanged", features: current };
     }
     body = Object.fromEntries(names.map((name) => [name, null]));
@@ -233,6 +309,16 @@ export function featuresExitCode(document: FeaturesDocument): number {
     : 1;
 }
 
+function parameterLine(parameter: ParameterState): string {
+  const label = PARAMETER_LABEL[parameter.name] ?? parameter.name;
+  const origin = parameter.configured === null ? "默认" : "已设置";
+  const activity =
+    !parameter.active && parameter.reason
+      ? `，${REASON_TEXT[parameter.reason] ?? parameter.reason}`
+      : "";
+  return `${parameter.name}：${parameter.value}（${origin}${activity}，可设 ${parameter.minimum}–${parameter.maximum}）— ${label}`;
+}
+
 function featureLine(feature: FeatureState): string {
   const label = FEATURE_LABEL[feature.name] ?? feature.name;
   const value = feature.enabled ? "开" : "关";
@@ -251,6 +337,8 @@ export function renderFeaturesText(document: FeaturesDocument): string {
   const state = document.features;
   const lines = [`当前模式：${state.mode}`];
   for (const feature of state.features) lines.push(featureLine(feature));
+  for (const parameter of state.parameters ?? [])
+    lines.push(parameterLine(parameter));
   lines.push(
     "片段召回（episode_recall）只对带片段的记忆有用：先开启 session_episodes，之后提取的记忆才会带片段。",
   );
@@ -258,7 +346,9 @@ export function renderFeaturesText(document: FeaturesDocument): string {
   if (document.state === "preview") {
     lines.push("将设置：");
     for (const [name, value] of Object.entries(document.target)) {
-      lines.push(`- ${name} = ${value ? "开" : "关"}`);
+      lines.push(
+        `- ${name} = ${typeof value === "number" ? value : value ? "开" : "关"}`,
+      );
     }
     lines.push(`未执行任何改动。确认后运行：${document.next_step}`);
   }

memhub/apps/cli/src/memory-language-cli.test.ts

@@ -0,0 +1,273 @@
+import { beforeEach, describe, expect, it, vi } from "vitest";
+
+import { run } from "./cli.js";
+import { parseLanguageCommand } from "./memory-language-flow.js";
+import { composeStatusReport, renderStatusText } from "./status-report.js";
+
+const transport = vi.hoisted(() => ({
+  get: vi.fn(),
+  post: vi.fn(),
+  put: vi.fn(),
+  patch: vi.fn(),
+  delete: vi.fn(),
+}));
+vi.mock("axios", () => ({
+  default: {
+    create: vi.fn(() => transport),
+    get: vi.fn(),
+    post: vi.fn(),
+    isAxiosError: () => false,
+  },
+}));
+
+const runtime = vi.hoisted(() => ({
+  inspectRuntimeStatus: vi.fn(),
+  discoverRuntimeAttachment: vi.fn(),
+}));
+vi.mock("@one-memory/runtime-control", async (importOriginal) => ({
+  ...(await importOriginal<typeof import("@one-memory/runtime-control")>()),
+  ...runtime,
+}));
+
+function languageState(uiLanguage: string | null, extra = {}) {
+  const sdk = uiLanguage === null ? "auto" : uiLanguage;
+  return {
+    ui_language: uiLanguage,
+    sdk_language: sdk,
+    languages: [
+      "en",
+      "zh-Hans",
+      "zh-Hant",
+      "ja",
+      "es",
+      "de",
+      "pt",
+      "fr",
+      "ko",
+      "ru",
+      "id",
+    ],
+    ...extra,
+  };
+}
+
+beforeEach(() => {
+  vi.clearAllMocks();
+  for (const method of Object.values(transport)) method.mockReset();
+  runtime.inspectRuntimeStatus.mockResolvedValue({
+    state: "running",
+    code: "runtime_verified",
+    instanceId: "instance-1",
+    host: "127.0.0.1",
+    port: 8765,
+    version: "1.2.3",
+  });
+  runtime.discoverRuntimeAttachment.mockResolvedValue({
+    instanceId: "instance-1",
+    apiToken: "synthetic-runtime-token",
+    host: "127.0.0.1",
+    port: 8765,
+    servicePid: 4242,
+    health: {
+      status: "ok",
+      service: "one-memory-core",
+      version: "1.2.3",
+      instance_id: "instance-1",
+    },
+  });
+  transport.get.mockImplementation(async (url: string) =>
+    url === "/api/v1/settings/ui-language"
+      ? { status: 200, data: languageState(null) }
+      : { status: 404, data: {} },
+  );
+});
+
+describe("memhub settings language", () => {
+  it("shows the display language and the SDK prompt language", async () => {
+    const result = await capturedRun(["settings", "language", "--json"]);
+    expect(result.code).toBe(0);
+    const json = JSON.parse(result.stdout);
+    expect(json).toMatchObject({
+      command: "settings language",
+      state: "ok",
+      language: { ui_language: null, sdk_language: "auto" },
+    });
+    expect(transport.put).not.toHaveBeenCalled();
+    const text = (await capturedRun(["settings", "language"])).stdout;
+    expect(text).toContain("界面语言：未设置（SDK 自动识别）");
+    expect(text).toContain("SDK 提示语言：auto");
+  });
+
+  it("sets a language at once and reports the SDK language", async () => {
+    transport.put.mockResolvedValue({
+      status: 200,
+      data: languageState("ja", { rebuilt: true }),
+    });
+    const result = await capturedRun(["settings", "language", "ja", "--json"]);
+    expect(result.code).toBe(0);
+    expect(transport.put).toHaveBeenCalledWith(
+      "/api/v1/settings/ui-language",
+      { ui_language: "ja" },
+      undefined,
+    );
+    expect(JSON.parse(result.stdout)).toMatchObject({
+      state: "committed",
+      rebuilt: true,
+      language: { ui_language: "ja", sdk_language: "ja" },
+    });
+    const text = (await capturedRun(["settings", "language", "ja"])).stdout;
+    expect(text).toContain("界面语言：ja（日本語）");
+  });
+
+  it("sends null for system and maps the legacy zh-CN code", async () => {
+    transport.put.mockResolvedValue({
+      status: 200,
+      data: languageState("zh-Hans", { rebuilt: false }),
+    });
+    await capturedRun(["settings", "language", "zh-CN"]);
+    expect(transport.put).toHaveBeenLastCalledWith(
+      "/api/v1/settings/ui-language",
+      { ui_language: "zh-Hans" },
+      undefined,
+    );
+    transport.get.mockResolvedValue({
+      status: 200,
+      data: languageState("en"),
+    });
+    transport.put.mockResolvedValue({
+      status: 200,
+      data: languageState(null, { rebuilt: true }),
+    });
+    await capturedRun(["settings", "language", "system"]);
+    expect(transport.put).toHaveBeenLastCalledWith(
+      "/api/v1/settings/ui-language",
+      { ui_language: null },
+      undefined,
+    );
+  });
+
+  it("does not write a language Core already has", async () => {
+    const result = await capturedRun(["settings", "language", "system"]);
+    expect(result.code).toBe(0);
+    expect(
+      JSON.parse(
+        (await capturedRun(["settings", "language", "system", "--json"]))
+          .stdout,
+      ).state,
+    ).toBe("unchanged");
+    expect(transport.put).not.toHaveBeenCalled();
+  });
+
+  it("refuses unknown codes before the Runtime", async () => {
+    for (const bad of [
+      ["settings", "language", "it"],
+      ["settings", "language", "EN"],
+      ["settings", "language", "ja", "ko"],
+    ]) {
+      expect((await capturedRun(bad)).code, bad.join(" ")).toBe(2);
+    }
+    expect(transport.put).not.toHaveBeenCalled();
+  });
+
+  it("parses the forms the help shows", () => {
+    expect(parseLanguageCommand([])).toEqual({ kind: "show" });
+    expect(parseLanguageCommand(["system"])).toEqual({
+      kind: "set",
+      language: null,
+    });
+    expect(parseLanguageCommand(["zh-Hant", "--json"])).toEqual({
+      kind: "set",
+      language: "zh-Hant",
+    });
+  });
+});
+
+describe("status language", () => {
+  it.each([
+    [null, "auto", "跟随系统", "auto（自动识别中/英）"],
+    ["ja", "ja", "ja", "SDK 提示语言 ja"],
+  ])(
+    "shows the UI language %s and the SDK language %s",
+    async (uiLanguage, sdkLanguage, uiText, sdkText) => {
+      const processing = {
+        pending: 0,
+        completed: 0,
+        failed: 0,
+        blocked_stages: [],
+        pipeline: {
+          mode: "pro",
+          configured_mode: "pro",
+          forced_by_env: false,
+          last_evolve_at: null,
+          graph_build: { state: "idle", users: {} },
+          evolve: { mode: "pro", schedule: null, running: [], users: {} },
+          features: {},
+          ui_language: uiLanguage,
+          sdk_language: sdkLanguage,
+        },
+      };
+      const report = await composeStatusReport({
+        dataDir: "/tmp/isolated",
+        runtime: { state: "running", code: "ok", host: "127.0.0.1", port: 1 },
+        background: null,
+        reader: (async (path: string) =>
+          path === "/api/v1/memory-processing"
+            ? { state: "ok", data: processing }
+            : { state: "unavailable", code: "x" }) as never,
+      });
+      expect(report.pipeline?.ui_language).toBe(uiLanguage);
+      expect(report.pipeline?.sdk_language).toBe(sdkLanguage);
+      const text = renderStatusText(report, "MemHub");
+      expect(text).toContain(uiText);
+      expect(text).toContain(sdkText);
+    },
+  );
+
+  it("reads an older Runtime without the setting as auto", async () => {
+    const report = await composeStatusReport({
+      dataDir: "/tmp/isolated",
+      runtime: { state: "running", code: "ok", host: "127.0.0.1", port: 1 },
+      background: null,
+      reader: (async () => ({
+        state: "ok",
+        data: {
+          pipeline: {
+            mode: "pro",
+            configured_mode: "pro",
+            evolve: {},
+            graph_build: {},
+          },
+        },
+      })) as never,
+    });
+    expect(report.pipeline?.sdk_language).toBe("auto");
+    expect(report.pipeline?.ui_language).toBeNull();
+  });
+});
+
+async function capturedRun(arguments_: string[]) {
+  let stdout = "";
+  let stderr = "";
+  const stdoutSpy = vi
+    .spyOn(process.stdout, "write")
+    .mockImplementation((chunk) => {
+      stdout += String(chunk);
+      return true;
+    });
+  const stderrSpy = vi
+    .spyOn(process.stderr, "write")
+    .mockImplementation((chunk) => {
+      stderr += String(chunk);
+      return true;
+    });
+  try {
+    return {
+      code: await run(arguments_, { ONE_MEMORY_DATA_DIR: "/synthetic/data" }),
+      stdout,
+      stderr,
+    };
+  } finally {
+    stdoutSpy.mockRestore();
+    stderrSpy.mockRestore();
+  }
+}

memhub/apps/cli/src/memory-language-flow.ts

@@ -0,0 +1,185 @@
+/**
+ * `memhub settings language [<code>|system]`.
+ *
+ * The display language the App reports to the Runtime (`ui_language`), and
+ * the SDK prompt language it implies. Every code, zh-Hans and en included,
+ * makes extraction and the other SDK prompts use that language; "system"
+ * (no language set) passes none, so the SDK keeps detecting Chinese or
+ * English as before. The App sends the language it shows, so it is only
+ * unset on an install without the App. A change applies at once: a write in flight
+ * finishes in the old language, the next ones use the new one. The App sends
+ * its own choice again whenever it changes there.
+ */
+
+import type { CoreReader } from "./core-client.js";
+import type { CorePutOperations } from "./core-operations.js";
+import { PRODUCT } from "./version.js";
+
+export const UI_LANGUAGES = [
+  "en",
+  "zh-Hans",
+  "zh-Hant",
+  "ja",
+  "es",
+  "de",
+  "pt",
+  "fr",
+  "ko",
+  "ru",
+  "id",
+] as const;
+export type UiLanguage = (typeof UI_LANGUAGES)[number];
+
+/** Codes earlier builds used, and the code each one is now. */
+const LEGACY: Record<string, UiLanguage> = { "zh-CN": "zh-Hans" };
+
+const NAMES: Record<UiLanguage, string> = {
+  en: "English",
+  "zh-Hans": "简体中文",
+  "zh-Hant": "繁體中文",
+  ja: "日本語",
+  es: "Español",
+  de: "Deutsch",
+  pt: "Português",
+  fr: "Français",
+  ko: "한국어",
+  ru: "Русский",
+  id: "Bahasa Indonesia",
+};
+
+export type LanguageCommand =
+  | { kind: "show" }
+  | { kind: "set"; language: UiLanguage | null };
+
+function isUiLanguage(value: string): value is UiLanguage {
+  return (UI_LANGUAGES as readonly string[]).includes(value);
+}
+
+/** Arguments after `settings language`; null = usage. */
+export function parseLanguageCommand(
+  values: readonly string[],
+): LanguageCommand | null {
+  const rest = values.filter((value) => value !== "--json");
+  if (rest.length === 0) return { kind: "show" };
+  if (rest.length !== 1) return null;
+  const raw = rest[0] ?? "";
+  const value: string = Object.hasOwn(LEGACY, raw) ? LEGACY[raw] : raw;
+  if (value === "system") return { kind: "set", language: null };
+  return isUiLanguage(value) ? { kind: "set", language: value } : null;
+}
+
+export interface LanguageState {
+  ui_language: UiLanguage | null;
+  sdk_language: string;
+  rebuilt?: boolean;
+}
+
+function languageState(value: unknown): LanguageState | null {
+  if (!value || typeof value !== "object") return null;
+  const item = value as Record<string, unknown>;
+  if (
+    !(item.ui_language === null || isUiLanguage(String(item.ui_language))) ||
+    typeof item.sdk_language !== "string"
+  ) {
+    return null;
+  }
+  return {
+    ui_language: item.ui_language as UiLanguage | null,
+    sdk_language: item.sdk_language,
+    ...(typeof item.rebuilt === "boolean" ? { rebuilt: item.rebuilt } : {}),
+  };
+}
+
+export type LanguageDocument = {
+  schema_version: 1;
+  product: string;
+  command: "settings language";
+} & (
+  | { state: "ok" | "unchanged"; language: LanguageState }
+  | { state: "committed"; language: LanguageState; rebuilt: boolean }
+  | { state: "rejected" | "unknown" | "unavailable"; code: string }
+);
+
+const BASE = {
+  schema_version: 1 as const,
+  product: PRODUCT,
+  command: "settings language" as const,
+};
+
+const PATH = "/api/v1/settings/ui-language";
+
+export async function runLanguageCommand(
+  command: LanguageCommand,
+  reader: CoreReader,
+  operations: CorePutOperations,
+): Promise<LanguageDocument> {
+  const read = await reader<unknown>(PATH);
+  if (read.state !== "ok") {
+    return { ...BASE, state: "unavailable", code: read.code };
+  }
+  const current = languageState(read.data);
+  if (current === null) {
+    return { ...BASE, state: "unavailable", code: "response_invalid" };
+  }
+  if (command.kind === "show") {
+    return { ...BASE, state: "ok", language: current };
+  }
+  if (current.ui_language === command.language) {
+    return { ...BASE, state: "unchanged", language: current };
+  }
+  const result = await operations.put<unknown>(PATH, {
+    ui_language: command.language,
+  });
+  if (result.state !== "committed") {
+    return { ...BASE, state: result.state, code: result.code };
+  }
+  const changed = languageState(result.data);
+  if (changed === null) {
+    return { ...BASE, state: "unknown", code: "response_invalid" };
+  }
+  return {
+    ...BASE,
+    state: "committed",
+    language: changed,
+    rebuilt: changed.rebuilt === true,
+  };
+}
+
+export function languageExitCode(document: LanguageDocument): number {
+  return ["ok", "unchanged", "committed"].includes(document.state) ? 0 : 1;
+}
+
+function sdkText(sdkLanguage: string): string {
+  return sdkLanguage === "auto"
+    ? "auto（SDK 自动识别中文或英文）"
+    : `${sdkLanguage}（提取等 SDK 提示使用该语言）`;
+}
+
+export function renderLanguageText(document: LanguageDocument): string {
+  if ("code" in document) {
+    return `界面语言未能${document.state === "unavailable" ? "读取" : "修改"}：${document.code}\n`;
+  }
+  const state = document.language;
+  const lines = [
+    `界面语言：${
+      state.ui_language === null
+        ? "未设置（SDK 自动识别）"
+        : `${state.ui_language}（${NAMES[state.ui_language]}）`
+    }`,
+    `SDK 提示语言：${sdkText(state.sdk_language)}`,
+  ];
+  if (document.state === "ok") {
+    lines.push(
+      `可选：${UI_LANGUAGES.join("、")}、system。任一语言（包括 zh-Hans、en）都会让 SDK 使用该语言；system 不指定语言，SDK 自动识别中文或英文。`,
+    );
+  }
+  if (document.state === "unchanged") lines.push("没有需要改动的设置。");
+  if (document.state === "committed") {
+    lines.push(
+      document.rebuilt
+        ? "已更新。正在进行的写入按原语言完成，之后的写入和检索使用新语言。"
+        : "已保存，SDK 提示语言没有变化。",
+    );
+  }
+  return `${lines.join("\n")}\n`;
+}

memhub/apps/cli/src/memory-mode-cli.test.ts

@@ -142,7 +142,7 @@ describe("memhub settings mode", () => {
       ["settings", "mode", "max"],
       ["settings", "mode", "--yes"],
       ["settings", "mode", "lite", "pro"],
-      ["settings", "language", "en"],
+      ["settings", "theme", "dark"],
     ]) {
       expect((await capturedRun(bad)).code, bad.join(" ")).toBe(2);
     }

memhub/apps/cli/src/memory-report.ts

@@ -248,6 +248,10 @@ function addReceipt(receipt: MemoryAddReceipt): Record<string, unknown> {
     task_id: receipt.task_id,
     memory_ids: receipt.memory_ids,
     error: receipt.error,
+    error_code:
+      typeof receipt.error_code === "string" ? receipt.error_code : null,
+    next_retry_at:
+      typeof receipt.next_retry_at === "string" ? receipt.next_retry_at : null,
   };
 }
 
@@ -347,6 +351,12 @@ export function renderMemoryAddText(document: MemoryAddDocument): string {
       ...((document.receipt.memory_ids as string[]).length > 0
         ? [`memory_ids: ${(document.receipt.memory_ids as string[]).join(",")}`]
         : []),
+      ...(document.receipt.error_code
+        ? [`error_code: ${document.receipt.error_code}`]
+        : []),
+      ...(document.receipt.next_retry_at
+        ? [`next_retry_at: ${document.receipt.next_retry_at}`]
+        : []),
       document.command === "memories add"
         ? `查询进度：memhub memories add-status ${document.request_id}；重试请带上同一个 --request-id，不会重复添加。`
         : "",

memhub/apps/cli/src/read-only-queries.test.ts

@@ -161,6 +161,7 @@ const CORE = new Map<string, { status: number; data: unknown }>([
         blocked_stages: [
           { kind: "extract", reason: "model_missing", count: 2 },
         ],
+        pipeline: { mode: "pro", configured_mode: "pro" },
       },
     },
   ],
@@ -202,7 +203,9 @@ const READ_ONLY_PATHS = [
   "/api/v1/live-sync",
   "/api/v1/memory-processing",
   "/api/v1/model-profiles",
+  "/api/v2/home-projection",
   "/api/v2/home-summary",
+  "/api/v2/raw",
   "/api/v2/memory-library",
   "/api/v2/memories/",
   "/api/v2/user-profile",
@@ -257,6 +260,9 @@ describe("CLI-20 status summary", () => {
     expect(report.sections.model).toMatchObject({ state: "ok", profiles: 1 });
     expect(report.sections.memories).toMatchObject({
       state: "ok",
+      content_plane: "memory",
+      visible_count: 42,
+      effective_mode: "pro",
       memory_count: 42,
     });
     expect(report.summary.state).toBe("ok");
@@ -903,7 +909,10 @@ describe("CLI-21 memory reads", () => {
     expect(isReadOnlyPath("/api/v2/memories/ask")).toBe(false);
     expect(isReadOnlyPath("/api/v2/memories/m1")).toBe(true);
     expect(isReadOnlyPath("/api/v2/memory-library")).toBe(true);
+    expect(isReadOnlyPath("/api/v2/home-projection")).toBe(true);
     expect(isReadOnlyPath("/api/v2/home-summary")).toBe(true);
+    expect(isReadOnlyPath("/api/v2/raw")).toBe(true);
+    expect(isReadOnlyPath("/api/v1/settings/memory-mode/plan")).toBe(true);
     // The retired v1 data plane is no longer a CLI read.
     expect(isReadOnlyPath("/api/v1/memories/m1")).toBe(false);
     expect(isReadOnlyPath("/api/v1/home-summary")).toBe(false);
@@ -1085,7 +1094,8 @@ describe("malformed success responses", () => {
 
   it("refuses a model profile whose string fields are not strings", async () => {
     transport.get.mockImplementation(async (url: string) => {
-      if (url !== "/api/v1/model-profiles") return CORE.get(url);
+      if (url !== "/api/v1/model-profiles")
+        return CORE.get(url) ?? { status: 404, data: { detail: "not_found" } };
       return {
         status: 200,
         data: [

memhub/apps/cli/src/status-report.test.ts

@@ -1,5 +1,6 @@
 import { describe, expect, it } from "vitest";
 
+import type { CoreReader, ReadOutcome } from "./core-client.js";
 import { composeDoctorReport, renderDoctorText } from "./doctor-report.js";
 import {
   composeStatusReport,
@@ -41,6 +42,75 @@ describe("status default output", () => {
   });
 });
 
+describe("status on a paused model", () => {
+  const processing = (backoff: {
+    llm_backoff_until: string | null;
+    llm_backoff_error: string | null;
+  }) => ({
+    pending: 4,
+    fresh_pending: 4,
+    backlog_pending: 0,
+    outside_window_pending: 0,
+    running: 0,
+    waiting_for_model: 0,
+    completed: 1,
+    failed: 0,
+    blocked_stages: [],
+    suspended: 2,
+    ...backoff,
+  });
+  const reader =
+    (summary: unknown): CoreReader =>
+    async <T>(path: string) =>
+      (path === "/api/v1/memory-processing"
+        ? { state: "ok", data: summary }
+        : { state: "unavailable", code: "x" }) as ReadOutcome<T>;
+  const compose = (summary: unknown) =>
+    composeStatusReport({
+      dataDir: "/tmp/isolated/.one-memory",
+      runtime: {
+        state: "running",
+        code: "runtime_verified",
+        host: "127.0.0.1",
+        port: 30001,
+      },
+      background: null,
+      reader: reader(summary),
+    });
+
+  it("names the code and the retry time while the breaker pauses", async () => {
+    const report = await compose(
+      processing({
+        llm_backoff_until: "2026-11-02T10:00:00+00:00",
+        llm_backoff_error: "model_auth_failed",
+      }),
+    );
+    expect(report.sections.processing).toMatchObject({
+      state: "ok",
+      pending: 4,
+      suspended: 2,
+      llm_backoff_until: "2026-11-02T10:00:00+00:00",
+      llm_backoff_error: "model_auth_failed",
+    });
+    const text = renderStatusText(report, "MemHub");
+    expect(text).toContain(
+      "模型暂停：model_auth_failed，将于 2026-11-02T10:00:00+00:00 自动重试",
+    );
+    expect(text).not.toContain("llm_backoff");
+  });
+
+  it("prints no pause line and null fields when nothing is paused", async () => {
+    const report = await compose(
+      processing({ llm_backoff_until: null, llm_backoff_error: null }),
+    );
+    expect(report.sections.processing).toMatchObject({
+      llm_backoff_until: null,
+      llm_backoff_error: null,
+    });
+    expect(renderStatusText(report, "MemHub")).not.toContain("模型暂停");
+  });
+});
+
 describe("status and doctor on an unfinished upgrade migration", () => {
   it("names the migration log and the issues page", async () => {
     const report = await composeStatusReport({
@@ -77,3 +147,140 @@ describe("status and doctor on an unfinished upgrade migration", () => {
     expect(report.runtime.log_file).toBeUndefined();
   });
 });
+
+describe("mode-aware status content projection", () => {
+  const runtime = {
+    state: "running" as const,
+    code: "runtime_verified",
+    host: "127.0.0.1",
+    port: 30001,
+  };
+  const processing = (mode: "lite" | "pro" | "ultra") => ({
+    pending: 0,
+    fresh_pending: 0,
+    backlog_pending: 0,
+    outside_window_pending: 0,
+    running: 0,
+    waiting_for_model: 0,
+    completed: 0,
+    failed: 0,
+    pipeline: { mode, configured_mode: mode },
+  });
+  const projection = {
+    projection_version: 1,
+    user_id: "local",
+    effective_mode: "lite",
+    capabilities: {
+      content_plane: "raw",
+      generation_required: false,
+      graph_enabled: false,
+      evolve_available: false,
+    },
+    visible_count: 7,
+    display_state: "excerpt",
+    latest: {
+      type: "raw",
+      raw_id: "raw-1",
+      session_id: "session-1",
+      display_state: "excerpt",
+      time: null,
+      time_basis: null,
+      excerpt: "hello",
+      truncated: false,
+      source_id: "cursor",
+    },
+    observed_at: "2026-11-04T00:00:00Z",
+  };
+
+  it("uses the projection without reading either legacy count endpoint", async () => {
+    const calls: string[] = [];
+    const reader: CoreReader = async <T>(path: string) => {
+      calls.push(path);
+      const data =
+        path === "/api/v2/home-projection"
+          ? projection
+          : path === "/api/v1/memory-processing"
+            ? processing("lite")
+            : null;
+      return { state: "ok", data } as ReadOutcome<T>;
+    };
+    const report = await composeStatusReport({
+      dataDir: "/tmp/isolated",
+      runtime,
+      background: null,
+      reader,
+    });
+    expect(report.sections.memories).toEqual({
+      state: "ok",
+      content_plane: "raw",
+      visible_count: 7,
+      effective_mode: "lite",
+      raw_count: 7,
+    });
+    expect(calls).not.toContain("/api/v2/raw");
+    expect(calls).not.toContain("/api/v2/home-summary");
+    expect(renderStatusText(report, "MemHub")).toContain(
+      "原始对话：原始对话 7",
+    );
+  });
+
+  it("falls back to the real raw total only for an old Lite Core", async () => {
+    const reader: CoreReader = async <T>(path: string) => {
+      if (path === "/api/v2/home-projection")
+        return { state: "not_found", code: "http_404" } as ReadOutcome<T>;
+      if (path === "/api/v1/memory-processing")
+        return {
+          state: "ok",
+          data: processing("lite"),
+        } as ReadOutcome<T>;
+      if (path === "/api/v2/raw")
+        return {
+          state: "ok",
+          data: {
+            user_id: "local",
+            items: [],
+            total: 9,
+            offset: 0,
+            limit: 1,
+            time_filtered: false,
+          },
+        } as ReadOutcome<T>;
+      return { state: "unavailable", code: "x" } as ReadOutcome<T>;
+    };
+    const report = await composeStatusReport({
+      dataDir: "/tmp/isolated",
+      runtime,
+      background: null,
+      reader,
+    });
+    expect(report.sections.memories).toMatchObject({
+      state: "ok",
+      content_plane: "raw",
+      visible_count: 9,
+      raw_count: 9,
+    });
+    expect(report.sections.memories).not.toHaveProperty("memory_count");
+  });
+
+  it("rejects extra projection fields instead of falling back or leaking them", async () => {
+    const reader: CoreReader = async <T>(path: string) =>
+      ({
+        state: "ok",
+        data:
+          path === "/api/v2/home-projection"
+            ? { ...projection, secret: "must-not-leak" }
+            : processing("lite"),
+      }) as ReadOutcome<T>;
+    const report = await composeStatusReport({
+      dataDir: "/tmp/isolated",
+      runtime,
+      background: null,
+      reader,
+    });
+    expect(report.sections.memories).toEqual({
+      state: "invalid",
+      code: "response_invalid",
+    });
+    expect(JSON.stringify(report)).not.toContain("must-not-leak");
+  });
+});

memhub/apps/cli/src/status-report.ts

@@ -1,4 +1,5 @@
 import type {
+  HomeProjectionV1,
   LiveSyncHealth,
   MemoryProcessingSummary,
   ModelProfile,
@@ -12,10 +13,12 @@ import { sdkMigrationLogPath } from "@one-memory/runtime-control";
 import type { CoreReader, ReadOutcome } from "./core-client.js";
 import {
   type SdkHomeSummary,
+  validateHomeProjection,
   validateHomeSummary,
   validateLiveSync,
   validateModelProfiles,
   validateProcessing,
+  validateRawTotal,
   validateSources,
 } from "./core-responses.js";
 import { describeEmbeddingSwitchSummary } from "./embedding-switch-flow.js";
@@ -85,7 +88,11 @@ export interface PipelineSummary {
   >;
   graph_build: string | null;
   /** SDK features (`memory_features`) whose value differs from the default. */
-  features: Record<string, boolean>;
+  features: Record<string, boolean | number>;
+  /** The App's display language; null = never chosen or "follow the system". */
+  ui_language: string | null;
+  /** The SDK prompt language: `auto` (zh/en detection) or the code passed. */
+  sdk_language: string;
 }
 
 const MODES = new Set(["lite", "pro", "ultra"]);
@@ -130,12 +137,13 @@ export function describePipeline(value: unknown): PipelineSummary | null {
       };
     }
   }
-  const features: Record<string, boolean> = {};
+  const features: Record<string, boolean | number> = {};
   if (item.features && typeof item.features === "object") {
     for (const [name, value] of Object.entries(
       item.features as Record<string, unknown>,
     )) {
-      if (typeof value === "boolean") features[name] = value;
+      if (typeof value === "boolean" || typeof value === "number")
+        features[name] = value;
     }
   }
   const graph =
@@ -158,6 +166,10 @@ export function describePipeline(value: unknown): PipelineSummary | null {
     evolve_users: users,
     graph_build: typeof graph.state === "string" ? graph.state : null,
     features,
+    ui_language: typeof item.ui_language === "string" ? item.ui_language : null,
+    // An older Runtime has no setting: it always left the SDK on auto.
+    sdk_language:
+      typeof item.sdk_language === "string" ? item.sdk_language : "auto",
   };
 }
 
@@ -202,12 +214,12 @@ export async function composeStatusReport(options: {
     for (const name of SECTION_NAMES) sections[name] = { state, code };
   } else {
     const reader = options.reader;
-    const [sources, sync, processing, model, memories] = await Promise.all([
+    const [sources, sync, processing, model, projection] = await Promise.all([
       reader<unknown>("/api/v1/sources"),
       reader<unknown>("/api/v1/live-sync"),
       reader<unknown>("/api/v1/memory-processing"),
       reader<unknown>("/api/v1/model-profiles"),
-      reader<unknown>("/api/v2/home-summary"),
+      reader<unknown>("/api/v2/home-projection"),
     ]);
     sections.sources = section(sources, validateSources, describeSources);
     sections.sync = section(sync, validateLiveSync, describeSync);
@@ -219,11 +231,7 @@ export async function composeStatusReport(options: {
     pipeline =
       processing.state === "ok" ? describePipeline(processing.data) : null;
     sections.model = section(model, validateModelProfiles, describeModel);
-    sections.memories = section(
-      memories,
-      validateHomeSummary,
-      describeMemories,
-    );
+    sections.memories = await memorySection(reader, projection, pipeline);
   }
   // A bridge we could not inspect is unknown, not broken and not fine.
   const bridge: StatusDocument["bridge"] =
@@ -303,7 +311,9 @@ export function renderStatusText(
   ];
   for (const name of SECTION_NAMES) {
     lines.push(
-      `${SECTION_LABELS[name]}：${sectionLine(report.sections[name])}`,
+      `${sectionLabel(name, report.sections[name])}：${sectionLine(
+        report.sections[name],
+      )}`,
     );
   }
   if (report.pipeline) lines.push(`记忆模式：${pipelineLine(report.pipeline)}`);
@@ -311,6 +321,8 @@ export function renderStatusText(
     report.sections.processing?.embedding_switch,
   );
   if (embeddingSwitch !== null) lines.push(`向量模型：${embeddingSwitch}`);
+  const backoff = modelBackoffLine(report.sections.processing);
+  if (backoff !== null) lines.push(backoff);
   if (report.summary.state === "partial") {
     const notes = [
       report.summary.degraded.length > 0
@@ -326,6 +338,21 @@ export function renderStatusText(
   return lines.join("\n");
 }
 
+/** "Model paused" while Core's circuit breaker holds model work back; null
+ * otherwise. Nothing to do here: the queue resumes by itself once the model
+ * answers again (or after the model is fixed). */
+function modelBackoffLine(section: Section | undefined): string | null {
+  if (section?.state !== "ok") return null;
+  const error = section.llm_backoff_error;
+  if (typeof error !== "string" || error.length === 0) return null;
+  const until = section.llm_backoff_until;
+  return `模型暂停：${error}，${
+    typeof until === "string" && until.length > 0
+      ? `将于 ${until} 自动重试`
+      : "稍后自动重试"
+  }`;
+}
+
 export function pipelineLine(pipeline: PipelineSummary): string {
   const parts: string[] = [pipeline.mode];
   if (pipeline.forced_by_env)
@@ -349,10 +376,20 @@ export function pipelineLine(pipeline: PipelineSummary): string {
   if (changed.length > 0) {
     parts.push(
       `；SDK 功能：${changed
-        .map(([name, value]) => `${name}=${value ? "开" : "关"}`)
+        .map(
+          ([name, value]) =>
+            `${name}=${typeof value === "number" ? value : value ? "开" : "关"}`,
+        )
         .join("、")}`,
     );
   }
+  parts.push(
+    `；界面语言 ${pipeline.ui_language ?? "跟随系统"}，SDK 提示语言 ${
+      pipeline.sdk_language === "auto"
+        ? "auto（自动识别中/英）"
+        : pipeline.sdk_language
+    }`,
+  );
   return parts.join("");
 }
 
@@ -365,15 +402,31 @@ function runtimeLine(report: StatusDocument): string {
   }）`;
 }
 
+/** Fields that have their own line (or none) instead of a place in the
+ * section's one-line summary. */
+const SECTION_LINE_OMITTED = new Set([
+  "state",
+  "code",
+  "embedding_switch",
+  "llm_backoff_until",
+  "llm_backoff_error",
+  "content_plane",
+  "visible_count",
+  "effective_mode",
+]);
+
+function sectionLabel(name: string, section: Section | undefined): string {
+  return name === "memories" && section?.content_plane === "raw"
+    ? "原始对话"
+    : SECTION_LABELS[name];
+}
+
 function sectionLine(section: Section | undefined): string {
   if (!section) return "未检查";
   if (section.state === "not_checked") return "未检查";
   if (section.state !== "ok") return "暂时不可用，请稍后重试";
   return Object.entries(section)
-    .filter(
-      ([key]) =>
-        key !== "state" && key !== "code" && key !== "embedding_switch",
-    )
+    .filter(([key]) => !SECTION_LINE_OMITTED.has(key))
     .map(([key, value]) => `${fieldLabel(key)} ${formatValue(value)}`)
     .join(" ");
 }
@@ -409,6 +462,7 @@ function fieldLabel(key: string): string {
     backlog_pending: "历史待处理",
     outside_window_pending: "稍后处理",
     waiting_for_model: "等待模型",
+    suspended: "来源已暂停",
     completed: "已完成",
     failed: "失败",
     blocked: "卡住",
@@ -418,6 +472,10 @@ function fieldLabel(key: string): string {
     profiles: "配置",
     active: "当前",
     memory_count: "记忆",
+    raw_count: "原始对话",
+    visible_count: "可见",
+    content_plane: "内容层",
+    effective_mode: "模式",
   };
   return labels[key] ?? key;
 }
@@ -489,10 +547,28 @@ function describeProcessing(
       reason: block.reason,
       count: block.count,
     })),
+    suspended: typeof summary.suspended === "number" ? summary.suspended : 0,
+    ...llmBackoffFields(summary),
     ...embeddingSwitchField(summary),
   };
 }
 
+/** The model circuit breaker: set only while Core pauses model work because
+ * the provider keeps failing. Both null when nothing is paused. */
+function llmBackoffFields(summary: MemoryProcessingSummary): {
+  llm_backoff_until: string | null;
+  llm_backoff_error: string | null;
+} {
+  const until = summary.llm_backoff_until;
+  const error = summary.llm_backoff_error;
+  return {
+    llm_backoff_until:
+      typeof until === "string" && until.length <= 64 ? until : null,
+    llm_backoff_error:
+      typeof error === "string" && /^[a-z_]{1,64}$/.test(error) ? error : null,
+  };
+}
+
 /** The running switch or merge, projected; absent when none runs. */
 function embeddingSwitchField(
   summary: MemoryProcessingSummary,
@@ -533,6 +609,70 @@ function describeMemories(summary: SdkHomeSummary): Record<string, unknown> {
   };
 }
 
+async function memorySection(
+  reader: CoreReader,
+  projection: ReadOutcome<unknown>,
+  pipeline: PipelineSummary | null,
+): Promise<Section> {
+  if (projection.state === "ok") {
+    const parsed = validateHomeProjection(projection.data);
+    return parsed === null
+      ? { state: "invalid", code: "response_invalid" }
+      : { state: "ok", ...describeProjection(parsed) };
+  }
+  if (projection.state !== "not_found") {
+    return {
+      state: projection.state === "denied" ? "denied" : "unavailable",
+      code: projection.code,
+    };
+  }
+  if (pipeline === null) {
+    return { state: "unavailable", code: "effective_mode_unavailable" };
+  }
+  if (pipeline.mode === "lite") {
+    const raw = await reader<unknown>("/api/v2/raw", {
+      limit: 1,
+      offset: 0,
+    });
+    if (raw.state !== "ok") {
+      return {
+        state: raw.state === "denied" ? "denied" : "unavailable",
+        code: raw.code,
+      };
+    }
+    const total = validateRawTotal(raw.data);
+    return total === null
+      ? { state: "invalid", code: "response_invalid" }
+      : {
+          state: "ok",
+          content_plane: "raw",
+          visible_count: total,
+          effective_mode: "lite",
+          raw_count: total,
+        };
+  }
+  const legacy = await reader<unknown>("/api/v2/home-summary");
+  return section(legacy, validateHomeSummary, (summary) => ({
+    content_plane: "memory",
+    visible_count: summary.memory_count,
+    effective_mode: pipeline.mode,
+    ...describeMemories(summary),
+  }));
+}
+
+function describeProjection(
+  projection: HomeProjectionV1,
+): Record<string, unknown> {
+  return {
+    content_plane: projection.capabilities.content_plane,
+    visible_count: projection.visible_count,
+    effective_mode: projection.effective_mode,
+    ...(projection.capabilities.content_plane === "raw"
+      ? { raw_count: projection.visible_count }
+      : { memory_count: projection.visible_count }),
+  };
+}
+
 function sum(
   sources: SourceResponse[],
   key: "imported_conversations" | "imported_messages",

memhub/apps/cli/src/user-id-cli.test.ts

@@ -208,6 +208,27 @@ describe("--user-id on the memory commands", () => {
     expect(direct.get.mock.calls[0][1].params).toEqual({ user_id: "wife" });
   });
 
+  it("prints the retry code and time of a write still waiting", async () => {
+    direct.get.mockResolvedValue({
+      data: {
+        request_id: REQUEST,
+        state: "accepted",
+        created_at: "T1",
+        updated_at: "T2",
+        error_code: "model_timeout",
+        next_retry_at: "2026-11-02T10:00:00+00:00",
+      },
+    });
+    const text = await capturedRun(["write", "status", REQUEST]);
+    expect(text.stdout).toContain("error_code: model_timeout");
+    expect(text.stdout).toContain("next_retry_at: 2026-11-02T10:00:00+00:00");
+    const json = await capturedRun(["write", "status", REQUEST, "--json"]);
+    expect(JSON.parse(json.stdout).write).toMatchObject({
+      error_code: "model_timeout",
+      next_retry_at: "2026-11-02T10:00:00+00:00",
+    });
+  });
+
   it("passes the user in the body of memory writes and searches", async () => {
     await capturedRun(["memories", "add", "Prefers tea", "--user-id", "wife"]);
     expect(transport.post.mock.calls[0][0]).toBe("/api/v2/memories");
@@ -373,6 +394,48 @@ describe("sources connect for a Hermes profile", () => {
     }
     expect(transport.post).not.toHaveBeenCalled();
   });
+
+  it("says the user id need not equal the Hermes profile name", async () => {
+    const result = await capturedRun([
+      "sources",
+      "connect",
+      "hermes",
+      "--user-id",
+      "wife:work",
+      "--root",
+      "~/.hermes/profiles/wife:work",
+    ]);
+    expect(result.code).toBe(2);
+    expect(result.stderr).toContain("用户 ID 不必等于 Hermes profile 名");
+    expect(result.stderr).toContain(
+      "--user-id wife-work --root ~/.hermes/profiles/wife:work",
+    );
+    expect(transport.post).not.toHaveBeenCalled();
+  });
+
+  it("explains a refused overlapping or profiles-container root", async () => {
+    for (const code of [
+      "hermes_root_is_profiles_container",
+      "hermes_root_overlaps_other_user",
+    ]) {
+      transport.post.mockResolvedValueOnce({
+        status: code.endsWith("container") ? 422 : 409,
+        data: { detail: code },
+      });
+      const result = await capturedRun([
+        "sources",
+        "connect",
+        "hermes",
+        "--user-id",
+        "kid",
+        "--root",
+        "/profiles",
+      ]);
+      expect(result.code).toBe(1);
+      expect(result.stdout).toContain(code);
+      expect(result.stdout).toContain("--root");
+    }
+  });
 });
 
 async function capturedRun(arguments_: string[]) {

memhub/apps/core/pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "uv_build"
 
 [project]
 name = "one-memory"
-version = "1.0.5"
+version = "1.0.6"
 description = "MemHub local-first memory core"
 readme = "README.md"
 requires-python = ">=3.12"
@@ -12,7 +12,7 @@ dependencies = [
     "fastapi>=0.141.1",
     "filelock>=3.32.4",
     # Public SDK version validated against MemHub's permission and recall contracts.
-    "hy-memory==2.0.10",
+    "hy-memory==2.0.13",
     # chromadb arrives through the HY SDK; locked here so an unrelated upgrade
     # cannot move the SDK's store. Built-in embedding consumes numpy directly.
     "chromadb==1.5.9",

memhub/apps/core/src/one_memory/background_work.py

@@ -15,6 +15,11 @@ BULK_WORKERS = 3
 SNAPSHOT_WORKERS = 8
 INTERACTIVE_READ_WORKERS = 4
 SOURCE_READER_WORKERS = 4
+# One per source the drain runs side by side (`max_concurrent_sources`), and
+# two over for the outcome inquiries that follow them.
+SDK_WRITE_WORKERS = 12
+# Recall's SDK reads: one search and the `get`s behind it (`_SDK_GET_CONCURRENCY`).
+SDK_READ_WORKERS = 8
 
 _pool: ThreadPoolExecutor | None = None
 _snapshot_pool: ThreadPoolExecutor | None = None
@@ -22,6 +27,7 @@ _interactive_pool: ThreadPoolExecutor | None = None
 _raw_read_pool: ThreadPoolExecutor | None = None
 _memory_read_pool: ThreadPoolExecutor | None = None
 _source_reader_pool: ThreadPoolExecutor | None = None
+_sdk_write_pool: ThreadPoolExecutor | None = None
 _warmed_readers: weakref.WeakSet[ThreadPoolExecutor] = weakref.WeakSet()
 _reader_warm_lock = threading.Lock()
 _interactive_reads = 0
@@ -71,15 +77,38 @@ def raw_read_pool() -> ThreadPoolExecutor:
 
 
 def memory_read_pool() -> ThreadPoolExecutor:
+    """Recall's own threads: SDK searches, gets, and what decides between them.
+
+    Recall used to hand these to the default pool, which SDK writes share. A
+    write that times out keeps its thread until the SDK returns (#231), so a
+    few stuck writes left recall waiting for a thread while `/health`, which
+    needs none, still answered.
+    """
     global _memory_read_pool
     if _memory_read_pool is None:
         _memory_read_pool = ThreadPoolExecutor(
-            max_workers=INTERACTIVE_READ_WORKERS,
+            max_workers=SDK_READ_WORKERS,
             thread_name_prefix="one-memory-memory-read",
         )
     return _memory_read_pool
 
 
+def sdk_write_pool() -> ThreadPoolExecutor:
+    """SDK writes, bounded and apart from everything else.
+
+    Each thread here only waits for the SDK's own loop thread to answer
+    (`_LoopThread.run`), so any thread outside that loop may make the call; a
+    stuck write therefore costs a thread of this pool and nobody else's.
+    """
+    global _sdk_write_pool
+    if _sdk_write_pool is None:
+        _sdk_write_pool = ThreadPoolExecutor(
+            max_workers=SDK_WRITE_WORKERS,
+            thread_name_prefix="one-memory-sdk-write",
+        )
+    return _sdk_write_pool
+
+
 def source_reader_pool() -> ThreadPoolExecutor:
     """Bounded process-wide pool for source iteration and parsing."""
     global _source_reader_pool
@@ -175,6 +204,30 @@ async def in_interactive_read[T](
     return await in_read_pool(interactive_read_pool(), work, *args, **kwargs)
 
 
+async def in_sdk_read[T](
+    work: Callable[..., T],
+    /,
+    *args: object,
+    **kwargs: object,
+) -> T:
+    """A recall-path read, in recall's own pool (`memory_read_pool`)."""
+    return await in_read_pool(memory_read_pool(), work, *args, **kwargs)
+
+
+async def in_sdk_write[T](
+    work: Callable[..., T],
+    /,
+    *args: object,
+    **kwargs: object,
+) -> T:
+    """One SDK write call, in the write pool (`sdk_write_pool`)."""
+    return await asyncio.get_running_loop().run_in_executor(
+        sdk_write_pool(),
+        copy_context().run,
+        partial(work, *args, **kwargs),
+    )
+
+
 def _retrieve[T](future: "asyncio.Future[T]") -> None:
     """Mark a shielded read's outcome as seen.
 
@@ -261,7 +314,10 @@ def _warm_reader_pool(reader: ThreadPoolExecutor) -> None:
 
 def shutdown_bulk_pool() -> None:
     global _pool, _snapshot_pool, _interactive_pool, _raw_read_pool, _memory_read_pool
-    global _source_reader_pool
+    global _source_reader_pool, _sdk_write_pool
+    if _sdk_write_pool is not None:
+        _sdk_write_pool.shutdown(wait=False, cancel_futures=True)
+        _sdk_write_pool = None
     if _pool is not None:
         _pool.shutdown(wait=False, cancel_futures=True)
         _pool = None

memhub/apps/core/src/one_memory/context_models.py

@@ -155,6 +155,8 @@ class SdkContextSearchResponse(BaseModel):
     used_characters: int = Field(ge=0, le=20000)
     truncated: bool
     total_ms: float = Field(ge=0)
+    #: Whose memories were searched: the request's `user_id`, else `local`.
+    user_id: str = Field(min_length=1, max_length=64)
 
 
 class ContextLaneResult(BaseModel):

memhub/apps/core/src/one_memory/context_routes.py

@@ -261,6 +261,7 @@ def sdk_context_router(dependencies: Sequence[Depends]) -> APIRouter:
                 used_characters=0,
                 truncated=True,
                 total_ms=(time.monotonic() - started) * 1000,
+                user_id=value.user_id,
             )
             await record(final, timed_out=True)
             return final
@@ -306,6 +307,7 @@ def sdk_context_router(dependencies: Sequence[Depends]) -> APIRouter:
             used_characters=used,
             truncated=truncated,
             total_ms=(time.monotonic() - started) * 1000,
+            user_id=value.user_id,
         )
         await record(final, timed_out=False)
         return final

memhub/apps/core/src/one_memory/database_access.py

@@ -111,10 +111,26 @@ MAIN_DATABASE_CHECKPOINT_WRITE_INTERVAL = 64
 MAIN_DATABASE_CHECKPOINT_SECONDS = 30.0
 
 # Advisory only: PASSIVE cannot force a frame past a long reader. Crossing this
-# threshold is a signal that the WAL is not converging and that read snapshots
-# or write volume need investigation.
+# threshold with frames still waiting to be copied back is a signal that the
+# WAL is not converging and that read snapshots or write volume need
+# investigation. A large file whose frames are all checkpointed is not: the
+# idle TRUNCATE below gives that space back.
 MAIN_DATABASE_WAL_WARN_BYTES = 512 * 1024 * 1024
 
+# What a WAL file is cut back to once a checkpoint has copied every frame and
+# the writer starts it over. Without a limit SQLite reuses the file in place
+# and never shrinks it, so one import peak left a 639 MB WAL behind for good
+# (#245). 64 MiB is about sixteen times what the default autocheckpoint (1000
+# pages) lets build up between checkpoints, so ordinary write bursts reuse the
+# file without growing and shrinking it each time, and it is still a tenth of
+# what that user's disk was left holding.
+MAIN_DATABASE_JOURNAL_SIZE_LIMIT_BYTES = 64 * 1024 * 1024
+
+# How long an idle TRUNCATE may wait for the writer or for a reader to leave.
+# It runs only when nothing holds the database; anyone arriving in the
+# meantime wins, and the checkpoint is tried again on the next pass.
+MAIN_DATABASE_IDLE_CHECKPOINT_WAIT_MS = 50
+
 
 def checkpoint_write_interval() -> int:
     raw = os.environ.get(
@@ -276,6 +292,8 @@ class MainDatabase:
         self._writes_since_checkpoint = 0
         self._last_checkpoint_at = time.monotonic()
         self._wal_warned_at = 0.0
+        #: Learned from the first checkpoint; turns WAL frames into bytes.
+        self._page_size = 4096
         self._reader_started_at: dict[int, float] = {}
 
     @contextmanager
@@ -542,16 +560,59 @@ class MainDatabase:
     def _checkpoint_from_maintenance(self, mode: str) -> tuple[int, int, int]:
         return self._checkpoint(mode, maintenance=True)
 
-    def _checkpoint(self, mode: str, *, maintenance: bool) -> tuple[int, int, int]:
+    def _checkpoint(
+        self,
+        mode: str,
+        *,
+        maintenance: bool,
+        busy_timeout_ms: int = WRITE_LOCK_WAIT_MS,
+    ) -> tuple[int, int, int]:
         normalized = mode.strip().upper()
         if normalized not in {"PASSIVE", "FULL", "RESTART", "TRUNCATE"}:
             raise ValueError("unsupported WAL checkpoint mode")
-        with self.write(autocommit=True, maintenance=maintenance) as connection:
+        with self.write(
+            autocommit=True, maintenance=maintenance, busy_timeout_ms=busy_timeout_ms
+        ) as connection:
             row = connection.execute(f"PRAGMA wal_checkpoint({normalized})").fetchone()
+            page_size = connection.execute("PRAGMA page_size").fetchone()
         if row is None or len(row) != 3:
             raise sqlite3.DatabaseError("SQLite returned an invalid checkpoint result")
+        if page_size is not None:
+            self._page_size = int(page_size[0])
         return int(row[0]), int(row[1]), int(row[2])
 
+    def idle(self) -> bool:
+        """Nobody holds or waits for a connection to this database right now."""
+        with self._state:
+            return (
+                self._writer_owner is None
+                and not self._reader_holders
+                and not len(self._write_line)
+                and not len(self._read_line)
+            )
+
+    def checkpoint_if_idle(self) -> tuple[int, int, int] | None:
+        """Give the WAL file back to the disk while nothing is using the database.
+
+        PASSIVE copies frames back but leaves the file its size; only TRUNCATE
+        empties it, and TRUNCATE has to wait for every reader to finish, so it
+        is attempted only when this process holds no checkout at all, and with
+        a wait of a few milliseconds. A busy result, or someone arriving in
+        between, is not a failure: the next idle pass tries again. Returns the
+        checkpoint result, or None when it was not attempted or not admitted.
+        """
+        if not self.idle() or self._wal_bytes() == 0:
+            return None
+        try:
+            return self._checkpoint(
+                "TRUNCATE",
+                maintenance=True,
+                busy_timeout_ms=MAIN_DATABASE_IDLE_CHECKPOINT_WAIT_MS,
+            )
+        except sqlite3.Error:
+            logger.debug("main_database_idle_checkpoint_skipped file=%s", self.path.name)
+            return None
+
     def _maybe_checkpoint_after_write(self) -> None:
         """Checkpoint on a write cadence without opening another connection.
 
@@ -579,17 +640,23 @@ class MainDatabase:
             logger.warning("main_database_checkpoint_failed file=%s", self.path.name, exc_info=True)
             return
         wal_bytes = self._wal_bytes()
-        if wal_bytes >= MAIN_DATABASE_WAL_WARN_BYTES:
+        # Frames the checkpoint could not copy back yet: what a reader is
+        # holding up. The file size alone also counts space already
+        # checkpointed and only waiting to be reused or truncated, which is
+        # not the WAL failing to converge.
+        pending_bytes = max(0, log_frames - checkpointed) * self._page_size
+        if pending_bytes >= MAIN_DATABASE_WAL_WARN_BYTES:
             with self._state:
                 should_warn = now - self._wal_warned_at >= MAIN_DATABASE_REPORT_SECONDS
                 if should_warn:
                     self._wal_warned_at = now
             if should_warn:
                 logger.warning(
-                    "main_database_wal_high file=%s wal_bytes=%d busy=%d "
+                    "main_database_wal_high file=%s wal_bytes=%d pending_bytes=%d busy=%d "
                     "log_frames=%d checkpointed=%d readers_in_use=%d",
                     self.path.name,
                     wal_bytes,
+                    pending_bytes,
                     busy,
                     log_frames,
                     checkpointed,
@@ -784,6 +851,10 @@ class MainDatabase:
         try:
             if wal:
                 enable_write_ahead_log(connection, wait_ms=busy_timeout_ms)
+            # Only the writer restarts the WAL, so only the writer needs the cap.
+            connection.execute(
+                f"PRAGMA journal_size_limit = {int(MAIN_DATABASE_JOURNAL_SIZE_LIMIT_BYTES)}"
+            )
             _seal(connection)
             if busy_timeout_ms != WRITE_LOCK_WAIT_MS:
                 # Opened at the caller's wait; every checkout starts at the default.
@@ -1027,6 +1098,18 @@ def main_database_transaction(
         yield connection
 
 
+def checkpoint_idle_main_databases() -> int:
+    """TRUNCATE the WAL of every database nobody is using; how many were emptied."""
+    with _databases_lock:
+        databases = list(_alive.values())
+    emptied = 0
+    for database in databases:
+        result = database.checkpoint_if_idle()
+        if result is not None and result[0] == 0:
+            emptied += 1
+    return emptied
+
+
 def close_main_databases() -> None:
     """Close every connection this process holds; used when the Core stops."""
     with _databases_lock:
@@ -1050,6 +1133,9 @@ async def report_main_database(seconds: float) -> None:
     while True:
         await asyncio.sleep(seconds)
         log_main_database_stats("periodic")
+        # The idle signal is this process's own checkouts: none held, none
+        # waiting. Off the loop, since a checkpoint is disk work however short.
+        await asyncio.to_thread(checkpoint_idle_main_databases)
 
 
 def main_database_stats() -> dict[str, float | int]:

memhub/apps/core/src/one_memory/embedding_switch_routes.py

@@ -126,15 +126,23 @@ def embedding_switch_router(dependencies: Sequence[Depends]) -> APIRouter:
 
     @router.post("/api/v1/embedding-switches", status_code=202, response_model=None)
     async def start_embedding_switch(value: EmbeddingSwitchStartRequest, request: Request) -> Any:
-        try:
-            job = await _service(request).start_switch(
-                value.profile_id,
-                expected_revision=value.expected_revision,
-                plan_token=value.plan_token,
-                requested_by=value.requested_by,
-            )
-        except EmbeddingSwitchError as error:
-            return refusal(error.code, plan=error.plan)
+        # One lifecycle lock orders mode/evolve/backfill and embedding
+        # maintenance. Without it each endpoint could pass its own preflight
+        # and then begin concurrently.
+        async with request.app.state.memory_mode_lock:
+            evolve = request.app.state.evolve_service
+            backfill = request.app.state.memory_graph_backfill
+            if evolve.running() or backfill.running:
+                return refusal("memory_lifecycle_busy")
+            try:
+                job = await _service(request).start_switch(
+                    value.profile_id,
+                    expected_revision=value.expected_revision,
+                    plan_token=value.plan_token,
+                    requested_by=value.requested_by,
+                )
+            except EmbeddingSwitchError as error:
+                return refusal(error.code, plan=error.plan)
         return job.model_dump(mode="json")
 
     @router.get("/api/v1/embedding-switches/current")

memhub/apps/core/src/one_memory/hy_runtime_config.py

@@ -14,7 +14,7 @@ from pathlib import Path
 from typing import Literal, cast
 
 HY_MEMORY_DISTRIBUTION = "hy-memory"
-HY_MEMORY_VERSION = "2.0.10"
+HY_MEMORY_VERSION = "2.0.13"
 HY_MEMORY_NAMESPACE = "governed-v2"
 DiagnosticLogLevel = Literal["error", "warning", "info", "debug"]
 

memhub/apps/core/src/one_memory/hy_sdk_migration.py

@@ -503,7 +503,7 @@ def _ensure_coding_schema(path: Path) -> None:
         CodingMemoryStore,
     )
 
-    # Relies on the pinned SDK's internals (hy-memory==2.0.10 is pinned exactly).
+    # Relies on the pinned SDK's internals (hy-memory==2.0.13 is pinned exactly).
     store = CodingMemoryStore.__new__(CodingMemoryStore)
     store._db_path = str(path)
     store._conn = None

memhub/apps/core/src/one_memory/hy_sdk_runtime.py

@@ -15,7 +15,7 @@ from collections.abc import Callable, Coroutine, Iterable, Iterator, Mapping
 from contextlib import contextmanager
 from dataclasses import dataclass
 from pathlib import Path
-from typing import Any, ClassVar, Literal, cast
+from typing import Any, ClassVar, Literal, TypedDict, cast
 
 from hy_memory import (  # type: ignore[import-untyped]
     AmbiguousMemoryIdError as AmbiguousMemoryIdError,  # re-export for api.py
@@ -47,8 +47,10 @@ from one_memory.local_embedding import LocalEmbedder
 from one_memory.log_file import confine_hy_sdk_logging
 from one_memory.memory_features import (
     FEATURES,
-    FEATURES_BY_NAME,
+    PARAMETERS,
+    SETTINGS_BY_NAME,
     FeatureOverrides,
+    SettingValue,
     feature_overrides,
 )
 from one_memory.model_profiles import (
@@ -191,6 +193,7 @@ class SdkClientHandle:
         space: EmbeddingSpace | None = None,
         mode: str | None = None,
         features: FeatureOverrides = (),
+        language: str | None = None,
     ) -> None:
         self._profile = profile
         self._api_key = api_key
@@ -201,6 +204,8 @@ class SdkClientHandle:
         self.mode = mode or effective_memory_mode()
         #: The SDK features set on its config (`memory_features`), fixed likewise.
         self.features = features
+        #: The SDK prompt language (`ui_language`); None = SDK auto-detect.
+        self.language = language
         self._lease: ClientLease | None = None
         self._constructing: asyncio.Future[ClientLease] | None = None
         self._lock = asyncio.Lock()
@@ -232,6 +237,7 @@ class SdkClientHandle:
                         http_transport_factory=self._http_transport_factory,
                         mode=self.mode,
                         features=self.features,
+                        **language_kwargs(self.language),
                     )
                 )
                 self._constructing = constructing
@@ -317,21 +323,27 @@ def sdk_relevance_floor() -> float:
     return min(1.0, max(0.0, value))
 
 
-def sdk_feature_defaults() -> dict[str, bool]:
-    """Each `memory_features` feature's SDK default, as a fresh config has it.
+def sdk_feature_defaults() -> dict[str, SettingValue]:
+    """Each `memory_features` setting's SDK default, as a fresh config has it.
 
     That is the SDK's code default unless the process environment sets the
     SDK's own variable (`FeatureSpec.env`), exactly what an unset feature
     leaves on a client.
     """
     config = MemoryConfig()
-    return {
+    defaults: dict[str, SettingValue] = {
         spec.name: bool(getattr(getattr(config, spec.section), spec.field)) for spec in FEATURES
     }
+    for parameter in PARAMETERS:
+        defaults[parameter.name] = float(
+            getattr(getattr(config, parameter.section), parameter.field)
+        )
+    return defaults
 
 
 def apply_sdk_features(
-    config: MemoryConfig, features: Mapping[str, bool] | Iterable[tuple[str, bool]]
+    config: MemoryConfig,
+    features: Mapping[str, SettingValue] | Iterable[tuple[str, SettingValue]],
 ) -> MemoryConfig:
     """Set each feature a person chose on its `MemoryConfig` field.
 
@@ -342,11 +354,36 @@ def apply_sdk_features(
     """
     values = dict(features.items() if isinstance(features, Mapping) else features)
     for name, value in feature_overrides(values):
-        spec = FEATURES_BY_NAME[name]
+        spec = SETTINGS_BY_NAME[name]
         setattr(getattr(config, spec.section), spec.field, value)
     return config
 
 
+class LanguageKwargs(TypedDict, total=False):
+    language: str
+
+
+def language_kwargs(language: str | None) -> LanguageKwargs:
+    """`language=` for a client constructor, only when there is one.
+
+    Without a language every call is the one it was before the setting
+    existed, so stand-ins written for that call keep working.
+    """
+    return {"language": language} if language is not None else {}
+
+
+def apply_sdk_language(config: MemoryConfig, language: str | None) -> MemoryConfig:
+    """Set the SDK prompt language (`MemoryConfig.language`), when there is one.
+
+    None (no language set) sets nothing: the SDK detects zh/en as it always
+    did. Every display language, zh-Hans included, is set explicitly. Like a feature, the language never touches `vector_store`, so
+    the collection identity never depends on it.
+    """
+    if language is not None:
+        config.language = language
+    return config
+
+
 def build_sdk_config(
     profile: ModelProfileSnapshot,
     space: EmbeddingSpace | None = None,
@@ -354,7 +391,8 @@ def build_sdk_config(
     *,
     api_key: str | None,
     data_dir: Path,
-    features: Mapping[str, bool] | Iterable[tuple[str, bool]] = (),
+    features: Mapping[str, SettingValue] | Iterable[tuple[str, SettingValue]] = (),
+    language: str | None = None,
 ) -> MemoryConfig:
     """Map a model snapshot and its embedding space to an SDK configuration.
 
@@ -365,7 +403,8 @@ def build_sdk_config(
     the registry existed is used: offline tools on a home with no registry.
     `mode` never changes a name, and neither do `features`
     (`memory_features`), which are set on top; with none the config is
-    exactly what it was before the setting existed.
+    exactly what it was before the setting existed. So is `language`
+    (`apply_sdk_language`); None leaves the SDK's own zh/en detection.
     """
     if mode is not None and mode not in {"lite", "pro", "ultra"}:
         raise HySdkRuntimeError("hy_sdk_memory_mode_invalid")
@@ -453,7 +492,7 @@ def build_sdk_config(
             "coding": {"db_path": str(root / "coding.sqlite3")},
         }
     )
-    return apply_sdk_features(config, features)
+    return apply_sdk_language(apply_sdk_features(config, features), language)
 
 
 def _acquire_for_handle(
@@ -465,6 +504,7 @@ def _acquire_for_handle(
     http_transport_factory: Callable[[], Any] | None,
     mode: str | None,
     features: FeatureOverrides = (),
+    language: str | None = None,
 ) -> ClientLease:
     # `acquire_client` is looked up at call time, so a stand-in replaces every
     # construction. A handle without a space keeps the call it always made.
@@ -477,6 +517,7 @@ def _acquire_for_handle(
         mode=mode,
         features=features,
         **named,
+        **language_kwargs(language),
     )
 
 
@@ -489,6 +530,7 @@ def acquire_client(
     http_transport_factory: Callable[[], Any] | None = None,
     mode: str | None = None,
     features: FeatureOverrides = (),
+    language: str | None = None,
 ) -> ClientLease:
     """Construct a public SDK client and return its explicit runtime lease.
 
@@ -496,7 +538,8 @@ def acquire_client(
     pipeline mode (lite / pro / ultra) and never changes a name; None keeps
     the pre-setting default (ultra when `ONE_MEMORY_GRAPH_STORE` is set, else
     pro). `features` are the `memory_features` set on its config; none keeps
-    every SDK default. Waits while `hold_stores_offline` holds this home's stores.
+    every SDK default. `language` is the SDK prompt language; None
+    auto-detects. Waits while `hold_stores_offline` holds this home's stores.
     """
     key = data_dir.resolve()
     with _STORE_GATE:
@@ -513,6 +556,7 @@ def acquire_client(
             mode=mode or effective_memory_mode(),
             features=features,
             **named,
+            **language_kwargs(language),
         )
     finally:
         with _STORE_GATE:
@@ -568,6 +612,7 @@ def _acquire_client(
     http_transport_factory: Callable[[], Any] | None,
     mode: str = "pro",
     features: FeatureOverrides = (),
+    language: str | None = None,
 ) -> ClientLease:
     config = build_sdk_config(
         profile,
@@ -576,6 +621,7 @@ def _acquire_client(
         api_key=api_key,
         data_dir=data_dir,
         features=features,
+        language=language,
     )
     config.http_transport_factory = http_transport_factory
     mismatch = inspect_graph_width_mismatch(config)

memhub/apps/core/src/one_memory/hy_sdk_types.py

@@ -75,6 +75,9 @@ class HySdkMemoryRecord(BaseModel):
     # Epoch seconds. `updated_at` falls back to `created_at`.
     created_at: int | None = None
     updated_at: int | None = None
+    # Actual scene=all ordering timestamp before the public fallback above.
+    # Internal-only: callers keep the existing SdkMemoryRecord wire shape.
+    sort_updated_at: int | None = Field(default=None, exclude=True, repr=False)
 
     @classmethod
     def from_sdk(cls, raw: object) -> HySdkMemoryRecord:
@@ -95,6 +98,10 @@ class HySdkMemoryRecord(BaseModel):
             if created_at is None:
                 created_at = gmt_created
             updated_at = _epoch(raw.get("updated_at"))
+            modified_at = _epoch(raw.get("gmt_modified"))
+            sort_updated_at = (
+                modified_at if modified_at is not None else updated_at
+            )
             return cls(
                 memory_id=str(raw["memory_id"]),
                 content=str(raw["content"]),
@@ -116,6 +123,7 @@ class HySdkMemoryRecord(BaseModel):
                 gmt_created=gmt_created,
                 created_at=created_at,
                 updated_at=updated_at if updated_at is not None else created_at,
+                sort_updated_at=sort_updated_at,
             )
         except (KeyError, TypeError, ValueError) as error:
             raise HySdkReadError("hy_memory_record_shape_unknown") from error
@@ -180,6 +188,7 @@ class HySdkMemoryRecord(BaseModel):
                 solution=solution,
                 created_at=created_at,
                 updated_at=updated_at if updated_at is not None else created_at,
+                sort_updated_at=updated_at,
             )
         except (KeyError, TypeError, ValueError) as error:
             raise HySdkReadError("hy_memory_record_shape_unknown") from error

memhub/apps/core/src/one_memory/imports/access.py

@@ -436,6 +436,11 @@ def root_identity_matches(root: Path, expected: str) -> bool:
     return _root_identity_matches_details(resolved, details, expected)
 
 
+def resolved_source_root(root: Path) -> Path:
+    """The real directory a root names (symlinks followed), as a grant records it."""
+    return _root_details(root)[0]
+
+
 def _check_root_identity(root: Path, expected: str | None) -> None:
     if expected is not None and not root_identity_matches(root, expected):
         raise SourceAccessError(SourceAccessErrorCode.SOURCE_IDENTITY_CHANGED)

memhub/apps/core/src/one_memory/imports/discovery.py

@@ -27,7 +27,7 @@ def discovered_off_loop(
     *,
     suffixes: frozenset[str],
     max_targets: int,
-    excluded_top_directories: frozenset[str] = frozenset(),
+    excluded_directory_names: frozenset[str] = frozenset(),
 ) -> AsyncIterator[SourceFileDiscoveryEvent]:
     """The same walk, for callers that have an event loop to keep free.
 
@@ -42,7 +42,7 @@ def discovered_off_loop(
             grant,
             suffixes=suffixes,
             max_targets=max_targets,
-            excluded_top_directories=excluded_top_directories,
+            excluded_directory_names=excluded_directory_names,
         ),
         scope_key=grant.source_id,
     )
@@ -53,15 +53,17 @@ def discover_source_files(
     *,
     suffixes: frozenset[str],
     max_targets: int,
-    excluded_top_directories: frozenset[str] = frozenset(),
+    excluded_directory_names: frozenset[str] = frozenset(),
 ) -> Iterator[SourceFileDiscoveryEvent]:
     """Metadata only: one lstat per candidate, no open and no per-file grant lookup.
 
     The grant and root identity are checked once before the walk. Each listed
     file keeps the grant's check, which runs again when that file is opened;
     the open itself refuses symlinks and any inode other than the one listed.
-    `excluded_top_directories` are directories directly under the root that
-    are never entered, such as another user's Hermes profiles.
+    `excluded_directory_names` are directory names never entered, at any
+    depth under the root, such as the `profiles` container that holds other
+    users' Hermes profiles. Any depth, because the granted root may sit above
+    the Hermes home (`~/.hermes` inside it is then `.hermes/profiles`).
     """
     grant.check_root()
     inspected = 0
@@ -69,12 +71,10 @@ def discover_source_files(
         grant.root,
         followlinks=False,
     ):
-        at_root = Path(directory) == grant.root
         child_directories[:] = sorted(
             child
             for child in child_directories
-            if not (Path(directory) / child).is_symlink()
-            and not (at_root and child in excluded_top_directories)
+            if not (Path(directory) / child).is_symlink() and child not in excluded_directory_names
         )
         for filename in sorted(filenames):
             if Path(filename).suffix.lower() not in suffixes:

memhub/apps/core/src/one_memory/imports/sources/common.py

@@ -209,6 +209,7 @@ class JsonlSourceAdapter:
         file_predicate: Callable[[AuthorizedSourceFile], bool] | None = None,
         suffixes: frozenset[str] = frozenset({".jsonl"}),
         header_selector: Callable[[dict[str, JsonValue]], bool] | None = None,
+        header_gate: Callable[[dict[str, JsonValue] | None], bool] | None = None,
     ) -> None:
         if descriptor.source_id != grant.source_id:
             raise ValueError("Descriptor and authorized root source IDs must match")
@@ -219,6 +220,10 @@ class JsonlSourceAdapter:
         self.file_predicate = file_predicate or (lambda _: True)
         self.suffixes = suffixes
         self.header_selector = header_selector
+        # False refuses the whole file before any record is read. It reports
+        # and leaves no cursor, so a release that learns the format reads the
+        # file from the top instead of finding it already behind a checkpoint.
+        self.header_gate = header_gate
         self._header_cache: dict[str, tuple[str, dict[str, JsonValue] | None]] = {}
         self._history_listing_cache: SourceListing | None = None
 
@@ -371,6 +376,9 @@ class JsonlSourceAdapter:
                 source_file, checkpoint, header = await asyncio.to_thread(
                     self._prepare, listed, options
                 )
+                if self.header_gate is not None and not self.header_gate(header):
+                    yield ScanFailure(reason_code=ScanIssueCode.UNSUPPORTED_SCHEMA)
+                    continue
                 _log.debug(
                     "import_file_read source=%s file=%d/%d file_bytes=%d planned_bytes=%d",
                     self.descriptor.source_id,
@@ -574,6 +582,9 @@ class JsonlSourceAdapter:
             # resumed scan starts past the header, and the records after it need
             # it just as much as the first batch did.
             header = await _read_header(reader, source_file, self.header_selector)
+            if self.header_gate is not None and not self.header_gate(header):
+                yield ScanFailure(reason_code=ScanIssueCode.UNSUPPORTED_SCHEMA)
+                continue
             last: SourceCursor = _start_cursor(source_file, options, checkpoint)
             async for raw in iterate_in_worker(
                 partial(reader, source_file, checkpoint=checkpoint),

memhub/apps/core/src/one_memory/imports/sources/deepseek_harness.py

@@ -1,3 +1,4 @@
+import re
 from pathlib import PurePosixPath
 
 from pydantic import JsonValue
@@ -37,6 +38,19 @@ DEEPSEEK_HARNESS_DESCRIPTOR = SourceDescriptor(
     ),
 )
 
+#: One session is one file, and the name carries the format generation it was
+#: written in: `session.jsonl[.zstd]` for the first format, then
+#: `session.v3.jsonl.zstd` and `session.v4.jsonl.zstd`. The version segment is
+#: part of the published on-disk contract, so discovery must accept it — the
+#: earlier exact-name match imported none of the versioned files.
+SESSION_FILE = re.compile(r"^session(?:\.v[0-9]+)?\.jsonl(?:\.zstd)?$")
+
+#: Session generations this parser has been verified against: the first format
+#: (header `version: 0`), v3 and v4. Discovery is intentionally wider than
+#: parsing: a future generation is found by pattern and then skipped from its
+#: header, so it is reported as unsupported instead of silently vanishing.
+SUPPORTED_SESSION_VERSIONS = frozenset({0, 3, 4})
+
 
 def create_deepseek_harness_adapter(
     grant: AuthorizedSourceRoot,
@@ -49,25 +63,43 @@ def create_deepseek_harness_adapter(
         grant=grant,
         parser=parse_deepseek_harness_record,
         source_version=source_version,
-        file_predicate=lambda source_file: (
-            source_file.relative_path.name in {"session.jsonl", "session.jsonl.zstd"}
-        ),
+        file_predicate=lambda source_file: bool(SESSION_FILE.match(source_file.relative_path.name)),
         suffixes=frozenset({".jsonl", ".zstd"}),
         header_selector=_is_session_header,
+        header_gate=_supported_session,
     )
 
 
 def _is_session_header(record: dict[str, JsonValue]) -> bool:
     """Harness writes the session's `cwd` once, in the first line only.
 
-    Verified against a session this machine produced: the header is
-    `{"type":"session","version":0,"id":...,"cwd":"/private/tmp/dsh-verify"}`
-    and no later record repeats it. Read per-record, `cwd` is therefore always
-    absent and every turn imports with no workspace.
+    Verified against sessions this machine produced: the header is
+    `{"type":"session","version":0|4,"id":...,"cwd":...}` and no later record
+    repeats it. Read per-record, `cwd` is therefore always absent and every turn
+    imports with no workspace.
     """
     return record.get("type") == "session"
 
 
+def _supported_session(header: dict[str, JsonValue] | None) -> bool:
+    """Whether the session's declared format generation is one we can read.
+
+    A missing header, or a header without `version`, is the first format — the
+    earliest files this adapter already read. Any declared version outside
+    `SUPPORTED_SESSION_VERSIONS` is refused rather than interpreted with today's
+    field rules: a future format may change field semantics, and importing it
+    wrongly is harder to undo than not importing it yet.
+    """
+    if header is None:
+        return True
+    version = header.get("version")
+    if version is None:
+        return True
+    if not isinstance(version, int) or isinstance(version, bool):
+        return False
+    return version in SUPPORTED_SESSION_VERSIONS
+
+
 def parse_deepseek_harness_record(
     record: dict[str, JsonValue],
     context: SourceRecordContext,
@@ -80,6 +112,11 @@ def parse_deepseek_harness_record(
     )
     event_type = record.get("type")
     data = as_record(record.get("data"))
+    if not _supported_session(context.header):
+        return ParsedSkip(
+            reason_code=ScanIssueCode.UNSUPPORTED_SCHEMA,
+            conversation_id=conversation_id,
+        )
     if event_type == "session":
         return ParsedSkip(reason_code=ScanIssueCode.UNKNOWN_RECORD)
     if data is None:
@@ -148,11 +185,18 @@ def _tool_message(
     """`tool/call` carries name and arguments; `tool/result` a user-role message.
 
     The same call also appears as a `tool-call` block in `assistant/message`;
-    only the event is read, so it is stored once.
+    only the event is read, so it is stored once. The first format and v3 wrap
+    the result in `tool-result` blocks; v4 writes plain `text` blocks, so both
+    shapes are read through the same clipping and credential-scrubbing path.
     """
     message = as_record(data.get("message"))
     if record.get("type") == "tool/result" and message is not None:
         text = tool_blocks_evidence(message.get("content"), block_types=frozenset({"tool-result"}))
+        if text is None:
+            text = tool_blocks_evidence(
+                [{"type": "tool-result", "content": message.get("content")}],
+                block_types=frozenset({"tool-result"}),
+            )
         message_id = first_string(message.get("id"), data.get("callId"))
     else:
         text = tool_evidence_text(data)

memhub/apps/core/src/one_memory/imports/sources/hermes.py

@@ -1,9 +1,9 @@
 import json
 import re
 import sqlite3
-from collections.abc import AsyncIterator, Iterator
+from collections.abc import AsyncIterator, Iterable, Iterator
 from functools import partial
-from pathlib import PurePosixPath
+from pathlib import Path, PurePosixPath
 
 from pydantic import JsonValue
 
@@ -88,7 +88,7 @@ class HermesSourceAdapter:
             self.grant,
             suffixes=frozenset({".jsonl", ".db"}),
             max_targets=10_000,
-            excluded_top_directories=frozenset({HERMES_PROFILES_DIRECTORY}),
+            excluded_directory_names=frozenset({HERMES_PROFILES_DIRECTORY}),
         ):
             if isinstance(item, AuthorizedSourceFile) and _is_hermes_target(
                 item.relative_path.as_posix()
@@ -102,7 +102,7 @@ class HermesSourceAdapter:
             self.grant,
             suffixes=frozenset({".jsonl", ".db"}),
             max_targets=options.max_scan_targets or 100_000,
-            excluded_top_directories=frozenset({HERMES_PROFILES_DIRECTORY}),
+            excluded_directory_names=frozenset({HERMES_PROFILES_DIRECTORY}),
         ):
             yield ScanProgressEvent(
                 phase=ScanPhase.DISCOVER,
@@ -253,16 +253,62 @@ def parse_hermes_rollout_record(
 #: own `state.db` and sessions. A profile is another person's history: it is
 #: read only through its own grant (its own MemHub user), never as part of the
 #: root above it. Hermes' own export skips this directory for the same reason.
+#:
+#: Skipped at any depth, not only directly under the root: a root granted
+#: above the Hermes home holds `.hermes/profiles/`. Hermes keeps nothing of
+#: its own under a directory of that name (its history is `state.db` and
+#: `sessions/`), so nothing real is lost.
 HERMES_PROFILES_DIRECTORY = "profiles"
 
 
 def _is_hermes_target(relative_path: str) -> bool:
     path = PurePosixPath(relative_path)
-    if path.parts and path.parts[0] == HERMES_PROFILES_DIRECTORY:
+    if HERMES_PROFILES_DIRECTORY in path.parts[:-1]:
         return False
     return path.name == "state.db" or (path.suffix == ".jsonl" and "sessions" in path.parts)
 
 
+def hermes_root_is_profiles_container(root: Path) -> bool:
+    """`profiles` itself holds everyone's profiles; it is never one person's history."""
+    return root.name == HERMES_PROFILES_DIRECTORY
+
+
+def hermes_root_conflict(mine: Path, other_users_roots: Iterable[Path]) -> str | None:
+    """Why the resolved root `mine` may not be granted beside other users' Hermes roots.
+
+    Paths are compared resolved (symlinks followed; the other users' roots are
+    resolved here). Two roots that are equal or nest would read the same files
+    for two users, except when one is exactly the other's `profiles/<name>`:
+    the scan above never enters `profiles/`, so the two stay apart (`local` on
+    `~/.hermes`, a user on `~/.hermes/profiles/<name>`). None when it may.
+    """
+    if hermes_root_is_profiles_container(mine):
+        return HERMES_ROOT_IS_PROFILES_CONTAINER
+    for other in other_users_roots:
+        theirs = _real(other)
+        if mine == theirs:
+            return HERMES_ROOT_OVERLAPS_OTHER_USER
+        for parent, child in ((mine, theirs), (theirs, mine)):
+            if parent in child.parents:
+                relative = child.relative_to(parent).parts
+                if len(relative) != 2 or relative[0] != HERMES_PROFILES_DIRECTORY:
+                    return HERMES_ROOT_OVERLAPS_OTHER_USER
+    return None
+
+
+#: 422: the root is the `profiles` container, not a profile.
+HERMES_ROOT_IS_PROFILES_CONTAINER = "hermes_root_is_profiles_container"
+#: 409: the root is, holds or sits inside another user's Hermes root.
+HERMES_ROOT_OVERLAPS_OTHER_USER = "hermes_root_overlaps_other_user"
+
+
+def _real(path: Path) -> Path:
+    try:
+        return path.expanduser().resolve(strict=False)
+    except (OSError, RuntimeError):
+        return path.expanduser().absolute()
+
+
 def _read_rollout(
     source_file: AuthorizedSourceFile,
     options: ScanOptions,

memhub/apps/core/src/one_memory/imports/sources/parsing.py

@@ -10,7 +10,10 @@ from pydantic import JsonValue
 from one_memory.input_sanitization import sanitize_model_input
 
 _REMINDER_TAGS = r"additional_data|system[-_]reminder|working_memory_reminder"
-_CONTEXT_TAGS = r"user_info|rules|agent_transcripts|system[-_]notification|pipeline_log"
+_CONTEXT_TAGS = (
+    r"user_info|rules|agent_transcripts|attached_files|image_local_path|"
+    r"system[-_]notification|pipeline_log"
+)
 _TAG_ATTRIBUTES = r"""(?:\s+[\w:-]+\s*=\s*(?:"[^"<>]*"|'[^'<>]*'))*\s*"""
 _HOST_PREFIX = re.compile(rf"<(?P<tag>{_REMINDER_TAGS}|{_CONTEXT_TAGS}){_TAG_ATTRIBUTES}>")
 _REMINDER_START = re.compile(rf"<(?P<tag>{_REMINDER_TAGS}){_TAG_ATTRIBUTES}>")

memhub/apps/core/src/one_memory/memory_additions.py

@@ -34,6 +34,7 @@ from one_memory.memory_governance import MemoryGovernanceStore, MemoryStatus
 from one_memory.memory_server.durable_queue import DurableWriteQueue
 from one_memory.memory_server.unified_entry import UnifiedWriteIntake
 from one_memory.memory_tasks import MemoryTaskStatus, MemoryTaskStore
+from one_memory.model_backoff import next_retry_at
 from one_memory.secrets import SecretStoreUnavailableError
 from one_memory.user_scope import DEFAULT_USER_ID, USER_ID_PATTERN, UserId
 
@@ -77,6 +78,12 @@ class MemoryAddReceipt(BaseModel):
     task_id: str | None = None
     memory_ids: list[str] = Field(default_factory=list)
     error: str | None = None
+    #: Why a note still being worked on last failed (`model_auth_failed`, ...),
+    #: or why a failed one failed. A provider failure keeps it `pending`.
+    error_code: str | None = None
+    #: When a pending note is next tried: its own retry wait, or the model
+    #: provider's pause while the provider is failing.
+    next_retry_at: str | None = None
 
 
 class LegacyMemoryAdditionReader:
@@ -258,6 +265,8 @@ class MemoryAdditionStore:
             durable_state = durable.state if durable is not None else "failed"
             mapped: MemoryAddState = {
                 "pending": "pending",
+                # Re-run automatically within seconds (`recover_unknown`).
+                "unknown": "pending",
                 "running": "running",
                 "waiting_for_model": "waiting_for_model",
                 "waiting_for_permission": "waiting_for_permission",
@@ -272,6 +281,12 @@ class MemoryAdditionStore:
                 state=mapped,
                 memory_ids=(list(durable.sdk_memory_ids) if durable is not None else []),
                 error=durable.detail if durable is not None else "write_missing",
+                error_code=(
+                    durable.error_code
+                    if durable is not None and durable.state != "completed"
+                    else None
+                ),
+                next_retry_at=durable.retry_at if durable is not None else None,
             )
         if self.processor is None:
             raise RuntimeError("legacy_memory_add_processor_unavailable")
@@ -402,10 +417,15 @@ def memory_add_router(dependencies: Sequence[Depends]) -> APIRouter:
         user_id: str = Query(default=DEFAULT_USER_ID, pattern=USER_ID_PATTERN),
     ) -> MemoryAddReceipt:
         try:
-            return store(request).receipt_for_request(request_id, user_id=user_id)
+            receipt = store(request).receipt_for_request(request_id, user_id=user_id)
         except KeyError as error:
             raise HTTPException(404, "memory_add_not_found") from error
         except ValueError as error:
             raise HTTPException(409, str(error)) from error
+        return receipt.model_copy(
+            update={
+                "next_retry_at": next_retry_at(request.app, receipt.state, receipt.next_retry_at)
+            }
+        )
 
     return router

memhub/apps/core/src/one_memory/memory_evolution.py

@@ -465,12 +465,16 @@ class EvolveScheduler:
         service: EvolveService,
         schedule: Callable[[], EvolveSchedule],
         users_with_memories: Callable[[], Awaitable[Iterable[str]]],
+        lifecycle_lock: asyncio.Lock | None = None,
+        lifecycle_open: Callable[[], bool] = lambda: True,
         now: Callable[[], datetime] = lambda: datetime.now().astimezone(),
         check_seconds: float = SCHEDULE_CHECK_SECONDS,
     ) -> None:
         self.service = service
         self.schedule = schedule
         self.users_with_memories = users_with_memories
+        self.lifecycle_lock = lifecycle_lock
+        self.lifecycle_open = lifecycle_open
         self._now = now
         self.check_seconds = check_seconds
         self._task: asyncio.Task[None] | None = None
@@ -492,7 +496,15 @@ class EvolveScheduler:
             if not evolve_due(now, schedule, last, anchor):
                 continue
             try:
-                receipt = self.service.start(user_id, trigger="scheduled")
+                if self.lifecycle_lock is None:
+                    if not self.lifecycle_open():
+                        break
+                    receipt = self.service.start(user_id, trigger="scheduled")
+                else:
+                    async with self.lifecycle_lock:
+                        if not self.lifecycle_open():
+                            break
+                        receipt = self.service.start(user_id, trigger="scheduled")
             except EvolveModeError:
                 break
             await self.service.wait(receipt.run_id)
@@ -533,10 +545,12 @@ class MemoryGraphBackfill:
         *,
         coordinator: EvolveCoordinator,
         state: EvolveStateStore,
+        lifecycle_open: Callable[[], bool] = lambda: True,
         now: Callable[[], datetime] = lambda: datetime.now(UTC),
     ) -> None:
         self.coordinator = coordinator
         self.state = state
+        self.lifecycle_open = lifecycle_open
         self._now = now
         self._task: asyncio.Task[None] | None = None
 
@@ -557,6 +571,35 @@ class MemoryGraphBackfill:
         self._task = asyncio.create_task(self._run(users), name="one-memory-graph-backfill")
         return state
 
+    def recover(self, user_ids: Iterable[str]) -> GraphBuildState:
+        """Resume an interrupted backfill without repeating completed users."""
+        if self.running:
+            return self.state.graph_build()
+        saved = self.state.graph_build()
+        if saved.state != "running":
+            return saved
+        users = tuple(dict.fromkeys((*saved.users.keys(), *user_ids)))
+        pending = tuple(
+            user_id
+            for user_id in users
+            if saved.users.get(user_id, GraphBuildUser()).state != "succeeded"
+        )
+        resumed = saved.model_copy(deep=True)
+        for user_id in pending:
+            resumed.users[user_id] = GraphBuildUser()
+        if not pending:
+            resumed.state = "succeeded"
+            resumed.finished_at = self._now()
+            self.state.set_graph_build(resumed)
+            return resumed
+        resumed.state = "running"
+        resumed.finished_at = None
+        self.state.set_graph_build(resumed)
+        self._task = asyncio.create_task(
+            self._run(pending), name="one-memory-graph-backfill-recovery"
+        )
+        return resumed
+
     async def wait(self) -> None:
         if self._task is not None:
             await asyncio.shield(self._task)
@@ -564,6 +607,8 @@ class MemoryGraphBackfill:
     async def _run(self, users: tuple[str, ...]) -> None:
         state = self.state.graph_build()
         for user_id in users:
+            while not self.lifecycle_open():
+                await asyncio.sleep(0.2)
             state.users[user_id] = GraphBuildUser(state="running")
             await asyncio.to_thread(self.state.set_graph_build, state.model_copy(deep=True))
             try:

memhub/apps/core/src/one_memory/memory_features.py

@@ -21,6 +21,11 @@ exercises (query rewrite needs `queries=[...]`, session narratives need
 cross-encoder download, access write-back); and everything MemHub already
 controls elsewhere (pipeline log, trace, memory operations, telemetry, mode).
 
+Beside the on/off features there is one numeric parameter,
+`intention_dedup_threshold` (`PARAMETERS`): the cosine similarity at which the
+read-time intention dedup treats two intentions as copies. It is set, stored,
+reset and keyed exactly like a feature.
+
 No SDK import here: only `hy_sdk_runtime` and `hy_sdk_migration` import it.
 `config_state` imports this module, so it imports nothing from there.
 """
@@ -31,7 +36,7 @@ from collections.abc import Mapping
 from dataclasses import dataclass
 from typing import Literal
 
-from pydantic import BaseModel, ConfigDict, StrictBool
+from pydantic import BaseModel, ConfigDict, Field, StrictBool
 
 MemoryFeatureName = Literal[
     "graph_rerank",
@@ -40,8 +45,13 @@ MemoryFeatureName = Literal[
     "session_episodes",
     "episode_summary",
     "intention",
+    "intention_dedup",
     "few_shot",
 ]
+#: Numeric settings beside the on/off features.
+MemoryParameterName = Literal["intention_dedup_threshold"]
+#: Every key of the setting: a feature or a parameter.
+MemorySettingName = MemoryFeatureName | MemoryParameterName
 #: Read features change search; write features change what extraction stores.
 FeatureSide = Literal["read", "write"]
 #: none: no extra call. extra_query: one more store query per search.
@@ -49,9 +59,25 @@ FeatureSide = Literal["read", "write"]
 #: a longer extraction prompt.
 FeatureCost = Literal["none", "extra_query", "llm_call", "prompt_tokens"]
 #: Why an enabled feature does nothing right now (`active: false`).
-FeatureReason = Literal["disabled", "requires_pro", "requires_ultra", "requires_graph_rerank"]
+FeatureReason = Literal[
+    "disabled",
+    "requires_pro",
+    "requires_ultra",
+    "requires_graph_rerank",
+    "requires_intention_dedup",
+]
+#: A feature is on or off; a parameter is a number.
+type SettingValue = bool | float
 #: A client's features as a hashable key: sorted (name, value) pairs, set ones only.
-type FeatureOverrides = tuple[tuple[str, bool], ...]
+type FeatureOverrides = tuple[tuple[str, SettingValue], ...]
+
+#: The range a person may set `intention_dedup_threshold` to. With dedup on,
+#: the SDK deletes every intention at or above it from the store at read time,
+#: which cannot be undone; below 0.8 the embedding models MemHub uses score
+#: different plans on one topic as that close, so a lower value would delete
+#: intentions that are not copies. 1.0 keeps only exact copies' dedup.
+INTENTION_DEDUP_THRESHOLD_MIN = 0.8
+INTENTION_DEDUP_THRESHOLD_MAX = 1.0
 
 _MODE_RANK: dict[str, int] = {"lite": 0, "pro": 1, "ultra": 2}
 
@@ -169,6 +195,23 @@ FEATURES: tuple[FeatureSpec, ...] = (
             "No extra call."
         ),
     ),
+    FeatureSpec(
+        name="intention_dedup",
+        section="recall",
+        field="intention_dedup_enabled",
+        env="MEMORY_INTENTION_DEDUP_ENABLED",
+        side="read",
+        requires_mode="pro",
+        requires_feature=None,
+        cost="none",
+        description=(
+            "Treat same-day intentions (L7) with the same expiry and a cosine "
+            "similarity at or above intention_dedup_threshold as copies: a "
+            "search returns the earliest and deletes the others from the store. "
+            "On by default; off hides, drops and deletes no intention, at read "
+            "time or in a write batch. No extra call."
+        ),
+    ),
     FeatureSpec(
         name="few_shot",
         section="llm",
@@ -189,12 +232,57 @@ FEATURE_NAMES: tuple[MemoryFeatureName, ...] = tuple(spec.name for spec in FEATU
 FEATURES_BY_NAME: dict[str, FeatureSpec] = {spec.name: spec for spec in FEATURES}
 
 
+@dataclass(frozen=True)
+class ParameterSpec:
+    """A numeric setting; it acts only while `requires_feature` acts."""
+
+    name: MemoryParameterName
+    section: Literal["recall"]
+    field: str
+    env: str
+    minimum: float
+    maximum: float
+    requires_feature: MemoryFeatureName
+    description: str
+
+    @property
+    def sdk_field(self) -> str:
+        return f"{self.section}.{self.field}"
+
+
+PARAMETERS: tuple[ParameterSpec, ...] = (
+    ParameterSpec(
+        name="intention_dedup_threshold",
+        section="recall",
+        field="intention_dedup_threshold",
+        env="MEMORY_INTENTION_DEDUP_THRESHOLD",
+        minimum=INTENTION_DEDUP_THRESHOLD_MIN,
+        maximum=INTENTION_DEDUP_THRESHOLD_MAX,
+        requires_feature="intention_dedup",
+        description=(
+            "Cosine similarity at or above which intention_dedup treats two "
+            "intentions as copies. Higher keeps more. The SDK default is 0.95 "
+            "(MEMORY_DEDUP_THRESHOLD also sets it when its own env var is unset)."
+        ),
+    ),
+)
+PARAMETER_NAMES: tuple[MemoryParameterName, ...] = tuple(spec.name for spec in PARAMETERS)
+PARAMETERS_BY_NAME: dict[str, ParameterSpec] = {spec.name: spec for spec in PARAMETERS}
+#: Every key of the setting, features first, each in its catalog order.
+SETTING_NAMES: tuple[MemorySettingName, ...] = (*FEATURE_NAMES, *PARAMETER_NAMES)
+SETTINGS_BY_NAME: dict[str, FeatureSpec | ParameterSpec] = {
+    **FEATURES_BY_NAME,
+    **PARAMETERS_BY_NAME,
+}
+
+
 class MemoryFeatures(BaseModel):
     """`config.json` `memory_features`, and the `PUT` body.
 
     Every key is optional; absent (or null) means the SDK default. In a `PUT`
-    an absent key is left as it is and null resets it. Unknown keys and
-    non-boolean values are refused (422).
+    an absent key is left as it is and null resets it. Unknown keys,
+    non-boolean feature values and a threshold that is not a number in its
+    range are refused (422).
     """
 
     model_config = ConfigDict(frozen=True, extra="forbid", strict=True)
@@ -205,7 +293,14 @@ class MemoryFeatures(BaseModel):
     session_episodes: StrictBool | None = None
     episode_summary: StrictBool | None = None
     intention: StrictBool | None = None
+    intention_dedup: StrictBool | None = None
     few_shot: StrictBool | None = None
+    intention_dedup_threshold: float | None = Field(
+        default=None,
+        ge=INTENTION_DEDUP_THRESHOLD_MIN,
+        le=INTENTION_DEDUP_THRESHOLD_MAX,
+        allow_inf_nan=False,
+    )
 
     def overrides(self) -> FeatureOverrides:
         """The features a person set, as the client key."""
@@ -221,24 +316,47 @@ class MemoryFeatures(BaseModel):
         return MemoryFeatures(**{key: value for key, value in values.items() if value is not None})
 
 
-def feature_overrides(values: Mapping[str, bool]) -> FeatureOverrides:
-    unknown = set(values) - set(FEATURES_BY_NAME)
+def feature_overrides(values: Mapping[str, SettingValue]) -> FeatureOverrides:
+    unknown = set(values) - set(SETTINGS_BY_NAME)
     if unknown:
         raise ValueError("unknown_memory_feature")
-    return tuple(sorted((name, bool(value)) for name, value in values.items()))
+    return tuple(sorted((name, _setting_value(name, value)) for name, value in values.items()))
+
+
+def _setting_value(name: str, value: SettingValue) -> SettingValue:
+    parameter = PARAMETERS_BY_NAME.get(name)
+    if parameter is None:
+        return bool(value)
+    if isinstance(value, bool) or not parameter.minimum <= float(value) <= parameter.maximum:
+        raise ValueError("invalid_memory_feature_value")
+    return float(value)
 
 
 def effective_features(
-    overrides: FeatureOverrides, defaults: Mapping[str, bool]
-) -> dict[str, bool]:
-    """Every feature's value: what a person set, else the SDK default."""
-    values: dict[str, bool] = {spec.name: bool(defaults.get(spec.name, False)) for spec in FEATURES}
+    overrides: FeatureOverrides, defaults: Mapping[str, SettingValue]
+) -> dict[str, SettingValue]:
+    """Every setting's value: what a person set, else the SDK default."""
+    values: dict[str, SettingValue] = {
+        spec.name: bool(defaults.get(spec.name, False)) for spec in FEATURES
+    }
+    for parameter in PARAMETERS:
+        if parameter.name in defaults:
+            values[parameter.name] = float(defaults[parameter.name])
     values.update(dict(overrides))
     return values
 
 
-def feature_activity(name: str, effective: Mapping[str, bool], mode: str) -> FeatureReason | None:
-    """None when the feature acts in this mode; else why it does not."""
+def feature_activity(
+    name: str, effective: Mapping[str, SettingValue], mode: str
+) -> FeatureReason | None:
+    """None when the feature acts in this mode; else why it does not.
+
+    A parameter acts exactly when the feature it tunes acts.
+    """
+    parameter = PARAMETERS_BY_NAME.get(name)
+    if parameter is not None:
+        reason = feature_activity(parameter.requires_feature, effective, mode)
+        return "requires_intention_dedup" if reason == "disabled" else reason
     spec = FEATURES_BY_NAME[name]
     if not effective.get(name, False):
         return "disabled"
@@ -252,11 +370,12 @@ def feature_activity(name: str, effective: Mapping[str, bool], mode: str) -> Fea
 
 
 def non_default_features(
-    overrides: FeatureOverrides, defaults: Mapping[str, bool]
-) -> dict[str, bool]:
-    """The features whose value differs from the SDK default, for status."""
+    overrides: FeatureOverrides, defaults: Mapping[str, SettingValue]
+) -> dict[str, SettingValue]:
+    """The settings whose value differs from the SDK default, for status."""
+    baseline = effective_features((), defaults)
     return {
         name: value
         for name, value in effective_features(overrides, defaults).items()
-        if value != bool(defaults.get(name, False))
+        if value != baseline.get(name)
     }

memhub/apps/core/src/one_memory/memory_server/config_state.py

@@ -19,6 +19,7 @@ from pydantic import BaseModel, ConfigDict, Field, StrictBool, field_validator
 
 from one_memory.memory_features import MemoryFeatures
 from one_memory.memory_queue import ExtractionWindowPreset
+from one_memory.ui_language import UI_LANGUAGES, UiLanguage
 
 _SOURCE_ID = re.compile(r"^[a-z0-9][a-z0-9-]{0,127}$")
 
@@ -73,6 +74,10 @@ class ConfigDocument(BaseModel):
     #: SDK retrieval and extraction features a person set; an unset one keeps
     #: the SDK default. See `one_memory.memory_features`.
     memory_features: MemoryFeatures = Field(default_factory=MemoryFeatures)
+    #: The display language the App shows (its choice, or the system language
+    #: it follows); None = none set. See `one_memory.ui_language` for what it
+    #: does to the SDK.
+    ui_language: UiLanguage | None = None
 
     @field_validator("sources")
     @classmethod
@@ -95,7 +100,7 @@ class ConfigFileError(RuntimeError):
     pass
 
 
-_WRITTEN_WHEN_SET = frozenset({"memory_mode", "evolve_schedule", "memory_features"})
+_WRITTEN_WHEN_SET = frozenset({"memory_mode", "evolve_schedule", "memory_features", "ui_language"})
 
 
 class ConfigStore:
@@ -148,6 +153,11 @@ class ConfigStore:
         with self._lock:
             return self._document.memory_mode
 
+    def memory_mode_explicitly_configured(self) -> bool:
+        """Whether a person chose the mode, including choosing the default."""
+        with self._lock:
+            return "memory_mode" in self._document.model_fields_set
+
     def set_memory_mode(self, mode: MemoryMode) -> ConfigDocument:
         if mode not in MEMORY_MODES:
             raise ValueError("invalid_memory_mode")
@@ -183,6 +193,19 @@ class ConfigStore:
             self._document = updated
             return updated
 
+    def ui_language(self) -> UiLanguage | None:
+        with self._lock:
+            return self._document.ui_language
+
+    def set_ui_language(self, language: UiLanguage | None) -> ConfigDocument:
+        if language is not None and language not in UI_LANGUAGES:
+            raise ValueError("invalid_ui_language")
+        with self._lock:
+            updated = self._document.model_copy(update={"ui_language": language})
+            self._write(updated)
+            self._document = updated
+            return updated
+
     def migrate_extraction_window_preset(self, preset: ExtractionWindowPreset) -> ConfigDocument:
         """Adopt the legacy SQL value only when config.json has no value."""
         if not isinstance(preset, ExtractionWindowPreset):

memhub/apps/core/src/one_memory/memory_server/durable_queue.py

@@ -21,6 +21,7 @@ import shutil
 import sqlite3
 import time as _time
 from collections.abc import Awaitable, Callable
+from contextlib import AbstractContextManager, nullcontext
 from dataclasses import dataclass
 from datetime import UTC, datetime, timedelta
 from pathlib import Path
@@ -52,6 +53,7 @@ from one_memory.memory_tasks import (
 from one_memory.memory_tasks import (
     POLICY_STOPPED_CODES as _TASK_POLICY_STOPPED_CODES,
 )
+from one_memory.model_backoff import ModelAttempt
 from one_memory.sdk_migration_log import error_chain_text
 from one_memory.service_levels import ServiceLevel, service_level_context
 from one_memory.user_scope import DEFAULT_USER_ID, lane_key, other_user_lane_prefix
@@ -107,6 +109,43 @@ PARKED_STATES = (WAITING_FOR_PERMISSION, WAITING_FOR_MODEL)
 #: re-admitted on a timer. The gap keeps a still-down model from spinning.
 DEFAULT_MODEL_READMIT_AFTER = timedelta(minutes=1)
 
+#: How long a job the execute gate handed back (`release_unstarted`) is left
+#: alone before it can be claimed again.
+RELEASE_HOLD = timedelta(seconds=5)
+
+#: Automatic retries of a job whose attempt failed for a reason other than the
+#: model provider: content the model or the SDK refused, a parse error, a
+#: crash or an interruption mid-write. After the last one the job is `failed`,
+#: shown with its code, and the queue moves on. A provider failure (a broken
+#: key, a model that is gone, a provider that is down) never counts: the job
+#: waits in `pending` for as long as the provider is broken, paced by
+#: `model_backoff`.
+JOB_RETRY_LIMIT = 3
+JOB_RETRY_FIRST_BACKOFF = timedelta(seconds=30)
+JOB_RETRY_BACKOFF_CAP = timedelta(minutes=3)
+
+#: The code a job interrupted mid-write carries when it has no better one.
+INTERRUPTED_ERROR_CODE = "durable_write_interrupted"
+
+
+def job_retry_backoff(retry: int) -> timedelta:
+    """The wait before automatic retry number `retry` (1-based)."""
+    wait: timedelta = JOB_RETRY_FIRST_BACKOFF * (2 ** min(max(retry - 1, 0), 16))
+    return min(wait, JOB_RETRY_BACKOFF_CAP)
+
+
+def sdk_request_id(idempotency_key: str, attempt: int) -> str:
+    """The SDK request id of a job's `attempt`-th write.
+
+    The SDK keeps one outcome per request id and replays it: a write that
+    failed under an id fails under it forever, without calling the model.
+    Every re-run therefore gets an id of its own. Attempt 0 is the job's own
+    key, so every job written before this existed keeps the id its outcome
+    was recorded under.
+    """
+    return idempotency_key if attempt <= 0 else f"{idempotency_key}#r{attempt}"
+
+
 #: Production drain-budget defaults. These are the single source consumed by
 #: the composition root; callers must not invent a second formula or copy a
 #: test probe's numbers into the product path.
@@ -337,6 +376,10 @@ LEGACY_MEMORY_WRITE_JOB_COLUMNS = (
     ("time_quality", "TEXT NOT NULL DEFAULT 'approximate'"),
     ("sdk_raw_ids_json", "TEXT NOT NULL DEFAULT '[]'"),
     ("sdk_memory_ids_json", "TEXT NOT NULL DEFAULT '[]'"),
+    #: Which SDK request id the next write uses (`sdk_request_id`).
+    ("sdk_attempt", "INTEGER NOT NULL DEFAULT 0"),
+    #: Automatic retries spent (`JOB_RETRY_LIMIT`); provider failures spend none.
+    ("retries", "INTEGER NOT NULL DEFAULT 0"),
 )
 
 _FIFO_BLOCKING_STATES = (PENDING, RUNNING, WAITING_FOR_PERMISSION, WAITING_FOR_MODEL)
@@ -381,6 +424,10 @@ class DurableWriteRecord:
     detail: str = ""
     sdk_raw_ids: tuple[str, ...] = ()
     sdk_memory_ids: tuple[str, ...] = ()
+    #: The stable code of the last failure, if the row carries one.
+    error_code: str | None = None
+    #: When a waiting row may next be claimed, if a retry wait holds it.
+    retry_at: str | None = None
 
 
 @dataclass(frozen=True)
@@ -746,10 +793,10 @@ class DurableWriteQueue:
         """Recover expired leases on the only engine D56 permits.
 
         A lease whose owner died before HY was invoked is safe to retry. Once
-        `hy_invoked` is recorded, the outcome may already exist in HY and its
-        requests have no idempotency key, so that row becomes `unknown`
-        instead of `pending`. Unknown is intentionally sticky: a later reclaim
-        pass cannot turn it back into retryable work.
+        `hy_invoked` is recorded the write may already have landed, so that
+        row becomes `unknown` instead of `pending`. `unknown` is only a stop
+        on the way: `recover_unknown` re-runs it under a new SDK request id,
+        after asking the SDK whether the old one succeeded.
         """
         now = datetime.now(UTC).isoformat()
         changed = 0
@@ -1509,13 +1556,15 @@ class DurableWriteQueue:
         with main_database(self.database_path).read(row_factory=sqlite3.Row) as connection:
             _require_queue_schema(connection)
             row = connection.execute(
-                "SELECT job_id, state, created_at, updated_at, last_error, "
+                "SELECT job_id, state, created_at, updated_at, last_error, lease_expires_at, "
                 "sdk_raw_ids_json,sdk_memory_ids_json "
                 "FROM memory_write_jobs WHERE idempotency_key=?",
                 (request_id,),
             ).fetchone()
         if row is None:
             return None
+        last_error = str(row["last_error"] or "")
+        retry_at = row["lease_expires_at"]
         return DurableWriteRecord(
             job_id=str(row["job_id"]),
             request_id=request_id,
@@ -1526,6 +1575,14 @@ class DurableWriteQueue:
             detail=str(row["last_error"] or ""),
             sdk_raw_ids=tuple(json.loads(str(row["sdk_raw_ids_json"]))),
             sdk_memory_ids=tuple(json.loads(str(row["sdk_memory_ids_json"]))),
+            error_code=last_error if _ERROR_CODE.fullmatch(last_error) else None,
+            retry_at=(
+                str(retry_at)
+                if str(row["state"]) == PENDING
+                and retry_at is not None
+                and str(retry_at) > datetime.now(UTC).isoformat()
+                else None
+            ),
         )
 
     def payload_for(self, job_id: str) -> WriteRequest | None:
@@ -1726,9 +1783,23 @@ class DurableWriteQueue:
                 )
         return updated.rowcount == 1
 
-    def release_unstarted(self, job_id: str, *, owner: str | None = None) -> bool:
-        """Return a claimed job to pending when its source was paused pre-HY."""
-        now = datetime.now(UTC).isoformat()
+    def release_unstarted(
+        self,
+        job_id: str,
+        *,
+        owner: str | None = None,
+        hold: timedelta = RELEASE_HOLD,
+    ) -> bool:
+        """Return a claimed job to pending when its source was paused pre-HY.
+
+        The row comes back with its lease still set `hold` into the future.
+        Claim only takes a pending row whose lease has expired, so a job the
+        execute gate just refused is not claimed again on the very next tick:
+        when the claim gate and the execute gate disagree for good (a
+        pre-upgrade payload whose Evidence belongs to another user than its
+        lane), the job is retried every few seconds instead of in a tight loop.
+        """
+        now = datetime.now(UTC)
         where = "job_id=? AND state=? AND hy_invoked=0"
         params: tuple[Any, ...] = (job_id, RUNNING)
         if owner is not None:
@@ -1738,11 +1809,175 @@ class DurableWriteQueue:
             updated = connection.execute(
                 "UPDATE memory_write_jobs SET state=?,lease_owner=NULL,"
                 "attempts=CASE WHEN attempts>0 THEN attempts-1 ELSE 0 END,"
-                "lease_expires_at=NULL,updated_at=? WHERE " + where,
-                (PENDING, now, *params),
+                "lease_expires_at=?,updated_at=? WHERE " + where,
+                (PENDING, (now + hold).isoformat(), now.isoformat(), *params),
             )
         return updated.rowcount == 1
 
+    def sdk_attempt(self, job_id: str) -> int:
+        """Which SDK request id this job's next write uses (`sdk_request_id`)."""
+        with main_database(self.database_path).read() as connection:
+            row = connection.execute(
+                "SELECT sdk_attempt FROM memory_write_jobs WHERE job_id=?", (job_id,)
+            ).fetchone()
+        return int(row[0]) if row is not None else 0
+
+    def requeue_for_model(
+        self,
+        job_id: str,
+        *,
+        error_code: str,
+        owner: str | None = None,
+    ) -> bool:
+        """Put a job the model provider failed back in line, as it was.
+
+        The provider is broken, not the job: it keeps its place in the queue
+        (`event_at`, `queue_seq`), spends no attempt and no retry, and is
+        claimed again once `model_backoff` lets a probe through. Whatever the
+        SDK may have kept of the failed write stays under that write's request
+        id; the next one gets an id of its own (`sdk_attempt`), so the SDK
+        does not replay the failure instead of calling the model.
+        """
+        now = datetime.now(UTC).isoformat()
+        where = "job_id=? AND state=?"
+        params: tuple[Any, ...] = (job_id, RUNNING)
+        if owner is not None:
+            where += " AND lease_owner=?"
+            params += (owner,)
+        with main_database(self.database_path).write() as connection, connection:
+            updated = connection.execute(
+                "UPDATE memory_write_jobs SET state=?,lease_owner=NULL,lease_expires_at=NULL,"
+                "attempts=CASE WHEN attempts>0 THEN attempts-1 ELSE 0 END,"
+                "sdk_attempt=sdk_attempt+hy_invoked,hy_invoked=0,"
+                "last_error=?,updated_at=? WHERE " + where,
+                (PENDING, error_code, now, *params),
+            )
+        return updated.rowcount == 1
+
+    def retry_or_fail(
+        self,
+        job_id: str,
+        *,
+        error_code: str,
+        owner: str | None = None,
+        now: datetime | None = None,
+    ) -> str:
+        """Retry a job that failed for a reason of its own, or give up on it.
+
+        Up to `JOB_RETRY_LIMIT` retries, each after a longer wait
+        (`job_retry_backoff`), held by the lease so the claim skips the job
+        until then. After the last one the job is `failed`: shown with its
+        code, out of the queue's way. A write that reached the SDK is re-run
+        under a new request id. Returns the state written, or "" when the row
+        is no longer this owner's.
+        """
+        now = now or datetime.now(UTC)
+        with (
+            main_database(self.database_path).write(row_factory=sqlite3.Row) as connection,
+            connection,
+        ):
+            row = connection.execute(
+                "SELECT state,lease_owner,retries FROM memory_write_jobs WHERE job_id=?",
+                (job_id,),
+            ).fetchone()
+            if (
+                row is None
+                or str(row["state"]) != RUNNING
+                or (owner is not None and row["lease_owner"] != owner)
+            ):
+                return ""
+            retry = int(row["retries"]) + 1
+            if retry > JOB_RETRY_LIMIT:
+                connection.execute(
+                    "UPDATE memory_write_jobs SET state=?,lease_owner=NULL,lease_expires_at=NULL,"
+                    "last_error=?,updated_at=? WHERE job_id=? AND state=?",
+                    (FAILED, error_code, now.isoformat(), job_id, RUNNING),
+                )
+                return FAILED
+            connection.execute(
+                "UPDATE memory_write_jobs SET state=?,lease_owner=NULL,lease_expires_at=?,"
+                "attempts=CASE WHEN attempts>0 THEN attempts-1 ELSE 0 END,"
+                "sdk_attempt=sdk_attempt+hy_invoked,hy_invoked=0,retries=?,"
+                "last_error=?,updated_at=? WHERE job_id=? AND state=?",
+                (
+                    PENDING,
+                    (now + job_retry_backoff(retry)).isoformat(),
+                    retry,
+                    error_code,
+                    now.isoformat(),
+                    job_id,
+                    RUNNING,
+                ),
+            )
+        return PENDING
+
+    def recover_unknown(
+        self,
+        *,
+        in_flight: Callable[[str], bool] = lambda _request_id: False,
+        limit: int = 128,
+        now: datetime | None = None,
+    ) -> int:
+        """Move every `unknown` job back into the queue, or out of it.
+
+        A job is `unknown` when its write may have reached the SDK and its
+        worker never learned how it ended: the process stopped, the lease
+        lapsed, or the work ceiling gave up on it. It is re-run, counted as a
+        retry so a crash loop ends in `failed`. The re-run gets a new SDK
+        request id and, before it starts, asks the SDK how the previous id
+        ended (`execute_job`): a write that did succeed is completed from its
+        receipt instead of being made twice.
+
+        Jobs from before this existed (upgrade) are handled the same way,
+        once: from then on they follow the normal rules. A write whose SDK
+        call is still running in this process (`in_flight`) is left until it
+        ends. A legacy row whose write is known to have landed against an
+        authority Core could not verify (`NON_RETRYABLE_POST_WRITE_CODES`) is
+        never re-run: it is `failed`, which says so.
+        """
+        now = now or datetime.now(UTC)
+        changed = 0
+        with (
+            main_database(self.database_path).write(row_factory=sqlite3.Row) as connection,
+            connection,
+        ):
+            rows = connection.execute(
+                "SELECT job_id,idempotency_key,sdk_attempt,retries,last_error "
+                "FROM memory_write_jobs WHERE state=? ORDER BY queue_seq LIMIT ?",
+                (UNKNOWN, limit),
+            ).fetchall()
+            for row in rows:
+                if in_flight(sdk_request_id(str(row["idempotency_key"]), int(row["sdk_attempt"]))):
+                    continue
+                last_error = str(row["last_error"] or "")
+                code = last_error if _ERROR_CODE.fullmatch(last_error) else INTERRUPTED_ERROR_CODE
+                retry = int(row["retries"]) + 1
+                if last_error in NON_RETRYABLE_POST_WRITE_CODES or retry > JOB_RETRY_LIMIT:
+                    changed += connection.execute(
+                        "UPDATE memory_write_jobs SET state=?,lease_owner=NULL,"
+                        "lease_expires_at=NULL,last_error=?,updated_at=? "
+                        "WHERE job_id=? AND state=?",
+                        (FAILED, code, now.isoformat(), str(row["job_id"]), UNKNOWN),
+                    ).rowcount
+                    continue
+                changed += connection.execute(
+                    "UPDATE memory_write_jobs SET state=?,lease_owner=NULL,lease_expires_at=?,"
+                    "attempts=0,sdk_attempt=sdk_attempt+1,hy_invoked=0,retries=?,"
+                    "last_error=?,updated_at=? WHERE job_id=? AND state=?",
+                    (
+                        PENDING,
+                        (now + job_retry_backoff(retry)).isoformat(),
+                        retry,
+                        code,
+                        now.isoformat(),
+                        str(row["job_id"]),
+                        UNKNOWN,
+                    ),
+                ).rowcount
+        if changed:
+            logger.info("durable_write_unknown_recovered count=%d", changed)
+        return changed
+
     def settle_worker_error(self, job_id: str, *, error_code: str, owner: str | None = None) -> str:
         """Fallback settlement when the injected executor raises past its guard.
 
@@ -2008,60 +2243,6 @@ class DurableWriteQueue:
             )
         return str(target)
 
-    def retry_unknown_confirmed(self, job_id: str) -> int:
-        """Requeue one unknown write only after an explicit user decision.
-
-        Automatic workers may never move ``unknown`` back to pending because
-        HY may already contain the result. This separate command boundary is
-        intentionally named for the confirmation it requires. The durable
-        job and any task rows created from the same Evidence are reset in one
-        short transaction, so the unified queue remains the only execution
-        entry and a half-reset attempt cannot become permanently stranded.
-        """
-        now = datetime.now(UTC).isoformat()
-        with (
-            main_database(self.database_path).write(row_factory=sqlite3.Row) as connection,
-            connection,
-        ):
-            row = connection.execute(
-                "SELECT state,last_error FROM memory_write_jobs WHERE job_id=?", (job_id,)
-            ).fetchone()
-            if (
-                row is None
-                or str(row["state"]) != UNKNOWN
-                or str(row["last_error"]) in NON_RETRYABLE_POST_WRITE_CODES
-            ):
-                return 0
-            # After the SDK cutover the legacy task tables are gone and the
-            # job is the only row to reset.
-            if not self.sdk_authority and _legacy_task_links_present(connection):
-                connection.execute(
-                    """
-                    UPDATE memory_tasks
-                    SET status='pending', runner_token=NULL, attempts=0,
-                        last_error_code='model_content_manual_retry_requested', updated_at=?
-                    WHERE status='unknown' AND task_id IN (
-                        SELECT inputs.task_id
-                        FROM memory_task_inputs AS inputs, json_each(inputs.refs_json) AS ref
-                        JOIN memory_write_job_evidence AS linked
-                          ON linked.evidence_id=json_extract(ref.value, '$.evidence_id')
-                        WHERE linked.job_id=?
-                    )
-                    """,
-                    (now, job_id),
-                )
-            changed = connection.execute(
-                """
-                UPDATE memory_write_jobs
-                SET state='pending', attempts=0, lease_owner=NULL,
-                    lease_expires_at=NULL, hy_invoked=0,
-                    last_error='model_content_manual_retry_requested', updated_at=?
-                WHERE job_id=? AND state='unknown'
-                """,
-                (now, job_id),
-            ).rowcount
-        return changed
-
     def readmit_cancelled_permission_confirmed(self, job_id: str, request: WriteRequest) -> int:
         """Requeue one unsent permission cancellation after explicit consent.
 
@@ -2114,115 +2295,6 @@ class DurableWriteQueue:
             ).rowcount
         return changed
 
-    def retry_timed_out_unknown_after_reconcile(
-        self,
-        *,
-        older_than: datetime,
-        limit: int = 32,
-    ) -> int:
-        """Requeue bounded timeout unknowns only after the caller queried HY.
-
-        This is not the general unknown retry path. Only a timed-out write with
-        attempts remaining is eligible, and attempts are preserved so repeated
-        timeouts stop at the durable ceiling instead of looping forever.
-        """
-        if type(limit) is not int or limit < 1:
-            raise ValueError("limit must be positive")
-        now = datetime.now(UTC).isoformat()
-        with (
-            main_database(self.database_path).write(row_factory=sqlite3.Row) as connection,
-            connection,
-        ):
-            rows = connection.execute(
-                "SELECT job_id FROM memory_write_jobs "
-                "WHERE state=? AND last_error='hy_memory_timeout' "
-                "AND attempts < max_attempts AND updated_at <= ? "
-                "ORDER BY updated_at, job_id LIMIT ?",
-                (UNKNOWN, older_than.isoformat(), limit),
-            ).fetchall()
-            job_ids = tuple(str(row["job_id"]) for row in rows)
-            if not job_ids:
-                return 0
-            placeholders = ",".join("?" for _ in job_ids)
-            connection.execute(
-                f"UPDATE memory_write_jobs SET state=?, lease_owner=NULL, "
-                f"lease_expires_at=NULL, hy_invoked=0, "
-                f"last_error='model_content_reconciled_absent_retry', updated_at=? "
-                f"WHERE state=? AND job_id IN ({placeholders})",
-                (PENDING, now, UNKNOWN, *job_ids),
-            )
-            if _legacy_task_links_present(connection):
-                connection.execute(
-                    f"UPDATE memory_tasks SET status=?, runner_token=NULL, "
-                    f"last_error_code='model_content_reconciled_absent_retry', updated_at=? "
-                    f"WHERE status=? AND task_id IN ("
-                    f"SELECT inputs.task_id FROM memory_task_inputs AS inputs "
-                    f"JOIN memory_write_job_evidence AS linked ON EXISTS ("
-                    f"SELECT 1 FROM json_each(inputs.refs_json) AS ref "
-                    f"WHERE json_extract(ref.value, '$.evidence_id')=linked.evidence_id) "
-                    f"WHERE linked.job_id IN ({placeholders}))",
-                    (MemoryTaskStatus.PENDING, now, MemoryTaskStatus.UNKNOWN, *job_ids),
-                )
-        return len(job_ids)
-
-    def retry_first_unknown_after_reconcile(
-        self,
-        *,
-        older_than: datetime,
-        limit: int = 32,
-    ) -> int:
-        """Retry one unresolved unknown outcome once, after reconciliation.
-
-        The caller first asks HY and checks linked governed output. Rows still
-        unknown may have lost the response after the SDK call, so one bounded
-        retry is useful. `attempts=1` is the guard: the retry claim increments
-        it to two, and a second unknown is left for explicit user recovery.
-        """
-        if type(limit) is not int or limit < 1:
-            raise ValueError("limit must be positive")
-        now = datetime.now(UTC).isoformat()
-        with (
-            main_database(self.database_path).write(row_factory=sqlite3.Row) as connection,
-            connection,
-        ):
-            rows = connection.execute(
-                "SELECT job_id FROM memory_write_jobs "
-                "WHERE state=? AND attempts=1 AND attempts < max_attempts "
-                f"AND COALESCE(last_error, '') NOT IN "
-                f"({','.join('?' for _ in NON_RETRYABLE_POST_WRITE_CODES)}) "
-                "AND updated_at <= ? ORDER BY updated_at, job_id LIMIT ?",
-                (
-                    UNKNOWN,
-                    *NON_RETRYABLE_POST_WRITE_CODES,
-                    older_than.isoformat(),
-                    limit,
-                ),
-            ).fetchall()
-            job_ids = tuple(str(row["job_id"]) for row in rows)
-            if not job_ids:
-                return 0
-            placeholders = ",".join("?" for _ in job_ids)
-            connection.execute(
-                f"UPDATE memory_write_jobs SET state=?, lease_owner=NULL, "
-                f"lease_expires_at=NULL, hy_invoked=0, "
-                f"last_error='model_content_unknown_auto_retry', updated_at=? "
-                f"WHERE state=? AND attempts=1 AND job_id IN ({placeholders})",
-                (PENDING, now, UNKNOWN, *job_ids),
-            )
-            if _legacy_task_links_present(connection):
-                connection.execute(
-                    f"UPDATE memory_tasks SET status=?, runner_token=NULL, "
-                    f"last_error_code='model_content_unknown_auto_retry', updated_at=? "
-                    f"WHERE status=? AND task_id IN ("
-                    f"SELECT inputs.task_id FROM memory_task_inputs AS inputs "
-                    f"JOIN memory_write_job_evidence AS linked ON EXISTS ("
-                    f"SELECT 1 FROM json_each(inputs.refs_json) AS ref "
-                    f"WHERE json_extract(ref.value, '$.evidence_id')=linked.evidence_id) "
-                    f"WHERE linked.job_id IN ({placeholders}))",
-                    (MemoryTaskStatus.PENDING, now, MemoryTaskStatus.UNKNOWN, *job_ids),
-                )
-        return len(job_ids)
-
     def resolve_unknown_from_linked_output(self, job_id: str) -> bool:
         """Close an unknown durable row when local governance output proves success."""
         with main_database(self.database_path).read(row_factory=sqlite3.Row) as connection:
@@ -2361,7 +2433,9 @@ class DurableWriteRegistry:
         # distinguishing detail. Parked and cancelled states keep their own
         # names — collapsing an authorization stop into `failed` is exactly the
         # pollution the task layer already rejects.
-        if record.state in (PENDING, RUNNING):
+        if record.state in (PENDING, RUNNING, UNKNOWN):
+            # `unknown` no longer waits for anyone: the drain re-runs it
+            # within seconds (`recover_unknown`), so to a caller it is queued.
             state = "accepted"
         elif record.state == DEAD:
             state = "failed"
@@ -2385,6 +2459,8 @@ class DurableWriteRegistry:
             detail=detail,
             raw_ids=record.sdk_raw_ids,
             memory_ids=record.sdk_memory_ids,
+            error_code=record.error_code if record.state != COMPLETED else None,
+            next_retry_at=record.retry_at,
         )
 
     def submit(
@@ -2464,14 +2540,24 @@ async def execute_job(
     evidence: EvidenceStore,
     owner: str | None = None,
     source_writes_permitted: Callable[[str], bool] | None = None,
-    admit_hy_invocation: Callable[[str, Callable[[], Awaitable[bool]]], Awaitable[bool]]
+    admit_hy_invocation: Callable[[str, bool, Callable[[], Awaitable[bool]]], Awaitable[bool]]
     | None = None,
+    model_failures: Callable[[], AbstractContextManager[ModelAttempt | None]] | None = None,
 ) -> None:
     """Run one durable job through the SDK-authority processor.
 
     ``process_sdk_job`` owns the one public SDK write. ``hy_invoked`` is
     recorded immediately before that call, so a crash mid-write is later
-    reclaimed to ``unknown`` instead of being retried blindly.
+    reclaimed to ``unknown`` and re-run (`recover_unknown`).
+
+    Each write uses the SDK request id of the job's current attempt
+    (`sdk_request_id`). A re-run first asks the SDK how the previous id
+    ended, and completes from its receipt if it succeeded.
+
+    ``model_failures`` (`ModelBackoff.attempt`) says whether the provider
+    failed while this write was in flight: such a job goes back to `pending`
+    as it was and waits for the provider. Any other failure is retried
+    `JOB_RETRY_LIMIT` times and then `failed`.
     """
     # Every store call here is synchronous SQLite work on the single writer or
     # a reader; made from the loop it would block health checks and the API for
@@ -2507,7 +2593,7 @@ async def execute_job(
 
     hy_invoked = False
 
-    async def mark_hy_invocation() -> None:
+    async def mark_hy_invocation(requires_generation: bool) -> None:
         """Persist the durable boundary immediately before the real HY call."""
         nonlocal hy_invoked
         if hy_invoked:
@@ -2535,7 +2621,7 @@ async def execute_job(
             return await in_the_background(queue.mark_invoked, job_id, owner=owner)
 
         if admit_hy_invocation is not None:
-            admitted = await admit_hy_invocation(source_id, mark)
+            admitted = await admit_hy_invocation(source_id, requires_generation, mark)
         else:
             if source_writes_permitted is not None and not source_writes_permitted(source_id):
                 raise RuntimeError("model_content_source_disabled")
@@ -2547,16 +2633,31 @@ async def execute_job(
             raise RuntimeError("durable_write_lease_lost_before_invocation")
         hy_invoked = True
 
+    attempt = await in_the_background(queue.sdk_attempt, job_id)
+    window = model_failures() if model_failures is not None else nullcontext(None)
+    provider: ModelAttempt | None = None
     try:
         level = ServiceLevel.REALTIME if request.priority == "live" else ServiceLevel.BACKGROUND
-        with service_level_context(level):
-            sdk_result = await supervisor.process_sdk_job(
-                records,
-                request_id=request.idempotency_key,
-                before_hy_invocation=mark_hy_invocation,
+        with service_level_context(level), window as provider:
+            previous = (
+                await _previous_write_receipt(
+                    supervisor, sdk_request_id(request.idempotency_key, attempt - 1)
+                )
+                if attempt > 0
+                else None
             )
-            raw_ids = sdk_result.raw_ids
-            memory_ids = sdk_result.memory_ids
+            if previous is not None:
+                # The write before this one did land: its worker only never
+                # learned so. Complete from its receipt rather than write twice.
+                raw_ids, memory_ids = previous.raw_ids, previous.memory_ids
+            else:
+                sdk_result = await supervisor.process_sdk_job(
+                    records,
+                    request_id=sdk_request_id(request.idempotency_key, attempt),
+                    before_hy_invocation=mark_hy_invocation,
+                )
+                raw_ids = sdk_result.raw_ids
+                memory_ids = sdk_result.memory_ids
     except Exception as error:  # noqa: BLE001 - classified below
         # Never persist the raw message: it may be a provider response or the
         # user's own text, and `last_error` is shown over HTTP as `detail`.
@@ -2576,51 +2677,56 @@ async def execute_job(
         ):
             await in_the_background(queue.release_unstarted, job_id, owner=owner)
             return
-        # The write coordinator classifies these before any SDK client is leased, so HY
-        # was provably not called. They must not read as `failed`:
+        provider_failure = provider.failure if provider is not None else None
+        if hy_invoked and provider_failure is not None:
+            # The provider failed this write (a broken key, a model that is
+            # gone, a provider that is down): the job is fine and waits for
+            # the provider, in its place, without spending a retry. The
+            # breaker paces when it is tried again.
+            await in_the_background(
+                queue.requeue_for_model, job_id, error_code=provider_failure, owner=owner
+            )
+            logger.info(
+                "durable_write_job_waiting_for_provider job_id=%s error_code=%s sdk_error=%s",
+                job_id,
+                provider_failure,
+                code,
+            )
+            return
+        # Refusals made before the SDK was called. They prove nothing was
+        # sent, and are states, not failures:
         # - authorization stop -> cancelled (the user turned it off);
-        # - no permission yet -> waiting_for_permission (parked, re-admitted
-        #   when a snapshot admits it);
-        # - transient model/provider trouble -> waiting_for_model (parked).
-        # Everything else may have crossed into HY, and HY has no idempotency
-        # key, so it is `unknown` rather than a blind retry.
+        # - no permission yet -> waiting_for_permission (re-admitted when a
+        #   snapshot admits it);
+        # - no usable model yet -> waiting_for_model (re-admitted when one is).
+        state: str | None = None
         if code in PRE_SEND_REFUSAL_CODES:
-            # The frozen input window is checked before the payload reaches
-            # HY. This one refusal therefore has a proven pre-send boundary.
-            state, invoked_marker = FAILED, False
-        elif hy_invoked:
-            # Error names do not prove execution phase: permission and
-            # evidence rechecks also run after HY returns. Once the durable
-            # marker is set, every failure is possibly-sent and must stay out
-            # of the automatic retry path.
-            state, invoked_marker = UNKNOWN, True
-        elif code in POLICY_STOPPED_CODES:
-            state, invoked_marker = CANCELLED, False
-        elif code in PERMISSION_REQUIRED_CODES or code.startswith("model_content_policy"):
-            state, invoked_marker = WAITING_FOR_PERMISSION, False
-        elif code in MODEL_NOT_READY_CODES:
-            state, invoked_marker = WAITING_FOR_MODEL, False
-        elif code == "model_content_transport_request_failed":
-            # The generation or embedding HTTP exchange can fail after HY has
-            # already persisted a node. Treating that as a pre-send failure
-            # permits a blind duplicate; the confirmed unknown flow first
-            # reconciles by request identity and only then requeues absence.
-            state, invoked_marker = UNKNOWN, True
-        elif code.startswith("model_content_") and code != "model_content_outcome_unknown":
-            state, invoked_marker = FAILED, False
+            # Deterministic: the same input exceeds the same window again.
+            state = FAILED
+        elif not hy_invoked and code in POLICY_STOPPED_CODES:
+            state = CANCELLED
+        elif not hy_invoked and (
+            code in PERMISSION_REQUIRED_CODES or code.startswith("model_content_policy")
+        ):
+            state = WAITING_FOR_PERMISSION
+        elif not hy_invoked and code in MODEL_NOT_READY_CODES:
+            state = WAITING_FOR_MODEL
+        if state is not None:
+            await in_the_background(
+                queue.settle,
+                job_id,
+                state=state,
+                error_code=code,
+                hy_invoked=hy_invoked,
+                owner=owner,
+            )
         else:
-            # Force the marker even if this row was not claimed first (a direct
-            # call): the outcome is only `unknown` because HY may have been
-            # reached, and reclaim must treat it as possibly-sent.
-            state, invoked_marker = UNKNOWN, True
-        await in_the_background(
-            queue.settle,
-            job_id,
-            state=state,
-            error_code=code,
-            hy_invoked=invoked_marker,
-            owner=owner,
-        )
+            # Anything else is this job's own trouble: content the model or
+            # the SDK refused, a reply that did not parse, a check that failed
+            # after the write. Retried a few times, then `failed`.
+            state = await in_the_background(
+                queue.retry_or_fail, job_id, error_code=code, owner=owner
+            )
         # Never `logger.exception` here: it prints the exception's message,
         # which may be a provider response or the user's own text. Log the
         # already-sanitised code instead, matching `hy-failure-classification`.
@@ -2638,9 +2744,10 @@ async def execute_job(
             # chain, never its message: `error_code=AttributeError` alone
             # named no location.
             logger.error(
-                "durable_write_job_failed job_id=%s error_code=%s chain=%s",
+                "durable_write_job_failed job_id=%s error_code=%s state=%s chain=%s",
                 job_id,
                 code,
+                state or "stale",
                 error_chain_text(error),
             )
         return
@@ -2665,6 +2772,14 @@ async def execute_job(
         )
 
 
+async def _previous_write_receipt(supervisor: Any, request_id: str) -> Any | None:
+    """The receipt of an earlier write of this job, if the SDK says it succeeded."""
+    inquire = getattr(supervisor, "inquire_write_outcome", None)
+    if inquire is None:
+        return None
+    return await inquire(request_id)
+
+
 class DurableWriteDrain:
     """Run SQLite durable jobs with lease, periodic renewal and no blind retry.
 
@@ -2694,6 +2809,7 @@ class DurableWriteDrain:
         reconcile_unknown: Callable[[], Awaitable[None]] | None = None,
         source_writes_permitted: Callable[[str], bool] | None = None,
         source_claim_enabled: Callable[[str], bool] | None = None,
+        model_claim_allowance: Callable[[], int | None] | None = None,
     ) -> None:
         self.queue = queue
         self.execute = execute
@@ -2769,6 +2885,11 @@ class DurableWriteDrain:
         self.reconcile_unknown = reconcile_unknown
         self.source_writes_permitted = source_writes_permitted
         self.source_claim_enabled = source_claim_enabled or source_writes_permitted
+        #: How many jobs may be claimed now while the model provider is being
+        #: given a rest (`model_backoff`): None for no limit, 0 to claim none.
+        #: Without it a backlog failing in 50ms each was hundreds of requests
+        #: a minute against a provider that refused every one (#245).
+        self.model_claim_allowance = model_claim_allowance
         self._last_unknown_reconcile: datetime | None = None
 
     def claim(
@@ -2812,6 +2933,14 @@ class DurableWriteDrain:
                 return ()
         except sqlite3.Error:
             pass
+        if self.model_claim_allowance is not None:
+            # Asked only once there is work to claim: while the provider is
+            # paused nothing is, and after the pause one job probes it.
+            allowance = self.model_claim_allowance()
+            if allowance is not None:
+                if allowance < 1:
+                    return ()
+                limit = min(limit, allowance)
         enabled_sources: set[str] | None = None
         if self.source_writes_permitted is not None:
             with main_database(self.queue.database_path).read() as connection:

memhub/apps/core/src/one_memory/memory_server/migrations.py

@@ -3163,6 +3163,33 @@ async def _060_memory_note_requests(cursor: Any) -> None:
         await cursor.execute(statement)
 
 
+def write_job_retries_ddl(dialect: str = "mysql") -> str:
+    """Per-job retry state: which SDK request id is next, and retries spent.
+
+    The SDK replays a request id's first outcome forever, so every re-run of
+    a job needs an id of its own (`sdk_attempt`). `retries` counts automatic
+    retries after failures of the job itself; provider failures spend none.
+    """
+    if dialect == "sqlite":
+        return """
+ALTER TABLE memory_write_jobs
+ADD COLUMN sdk_attempt INTEGER NOT NULL DEFAULT 0;
+ALTER TABLE memory_write_jobs
+ADD COLUMN retries INTEGER NOT NULL DEFAULT 0;
+"""
+    return """
+ALTER TABLE memory_write_jobs
+ADD COLUMN sdk_attempt INT NOT NULL DEFAULT 0;
+ALTER TABLE memory_write_jobs
+ADD COLUMN retries INT NOT NULL DEFAULT 0;
+"""
+
+
+async def _061_write_job_retries(cursor: Any) -> None:
+    for statement in _split_statements(write_job_retries_ddl(_dialect(cursor))):
+        await cursor.execute(statement)
+
+
 def _split_statements(sql: str) -> list[str]:
     """Split a multi-statement script, dropping blanks, PRAGMA and comments.
 
@@ -3462,4 +3489,5 @@ MIGRATIONS: tuple[Migration, ...] = (
         _060_memory_note_requests,
         ("memory_note_requests",),
     ),
+    Migration(61, "write_job_retries", _061_write_job_retries),
 )

memhub/apps/core/src/one_memory/memory_server/registry.py

@@ -57,6 +57,11 @@ class WriteRecord:
     detail: str = ""
     raw_ids: tuple[str, ...] = ()
     memory_ids: tuple[str, ...] = ()
+    #: The stable code of the last failure of a job still being worked on
+    #: (or of a failed one).
+    error_code: str | None = None
+    #: When a waiting job is next tried, if a retry wait holds it.
+    next_retry_at: str | None = None
 
 
 def _now() -> str:

memhub/apps/core/src/one_memory/memory_server/routes.py

@@ -44,6 +44,7 @@ from one_memory.memory_server.durable_queue import (
 )
 from one_memory.memory_server.registry import WriteRegistry, WriteState
 from one_memory.memory_server.submit import WriteConflictError
+from one_memory.model_backoff import next_retry_at
 from one_memory.user_scope import DEFAULT_USER_ID, USER_ID_PATTERN, UserId
 
 #: Durable keys of another user's writes start with this. A `local` request
@@ -72,6 +73,12 @@ class MemoryWriteReceipt(BaseModel):
     detail: str = ""
     raw_ids: tuple[str, ...] = ()
     memory_ids: tuple[str, ...] = ()
+    #: Why a job still being worked on last failed (`model_auth_failed`, ...),
+    #: or why a failed one failed. A provider failure keeps `state` queued.
+    error_code: str | None = None
+    #: When it is next tried: the job's own retry wait, or the model
+    #: provider's pause (`model_backoff`) while the provider is failing.
+    next_retry_at: str | None = None
 
 
 class OpenAIMessage(BaseModel):
@@ -235,6 +242,8 @@ def sdk_router(dependencies: list[Any] | None = None) -> APIRouter:
             detail=record.detail,
             raw_ids=record.raw_ids,
             memory_ids=record.memory_ids,
+            error_code=record.error_code,
+            next_retry_at=next_retry_at(request.app, record.state, record.next_retry_at),
         )
 
     return instance

memhub/apps/core/src/one_memory/model_backoff.py

@@ -0,0 +1,330 @@
+"""One pause for every model request while the provider keeps failing (#245).
+
+A broken model configuration (a revoked key, a wrong base URL, a model that
+does not exist, a provider that is down) used to fail each queued job on its
+own: the drain claimed the next job the moment the last one failed, so a
+backlog of hundreds of jobs turned into requests as fast as the provider could
+refuse them. The pause is global, not per job: a failure says something about
+the provider, not about the conversation that happened to hit it.
+
+After the first failure no further model work is claimed for 5 seconds; each
+failed probe after that doubles the pause, up to 3 minutes. A pause admits one
+probe job at a time. The first success, or any change the user makes to the
+model configuration, ends it at once. Jobs not yet sent stay `pending`.
+"""
+
+from __future__ import annotations
+
+import logging
+import threading
+import time
+from collections.abc import Callable, Iterator
+from contextlib import contextmanager
+from dataclasses import dataclass
+from datetime import UTC, datetime, timedelta
+from typing import Any
+
+import httpx
+
+logger = logging.getLogger(__name__)
+
+BACKOFF_FIRST_SECONDS = 5.0
+BACKOFF_CAP_SECONDS = 180.0
+#: How long one probe may hold the pause open before another is admitted. A
+#: probe job that never reaches the provider (nothing to remember, a refusal
+#: before the SDK) reports nothing, and the queue must not wait on it forever.
+PROBE_HOLD_SECONDS = 30.0
+#: Requests already in flight when the pause began are refused without going
+#: out once this many failures in a row confirm it is not a one-off.
+REFUSE_IN_FLIGHT_AFTER = 2
+
+#: Statuses that say the configuration or the provider is wrong, not the one
+#: request: authentication, a missing model or route, throttling, a timeout
+#: and the provider's own failures. A 400/413/422 is about the request's
+#: content and is left to that job.
+_PROVIDER_STATUSES = {401: "model_auth_failed", 403: "model_auth_failed", 404: "model_not_found"}
+
+#: Every code a provider failure is recorded under: a job that failed with one
+#: of these waits for the provider instead of spending a retry.
+MODEL_FAILURE_CODES = frozenset(
+    {
+        "model_auth_failed",
+        "model_not_found",
+        "model_timeout",
+        "model_rate_limited",
+        "model_server_error",
+        "model_unreachable",
+        "model_transport_failed",
+    }
+)
+
+
+def backoff_seconds(level: int) -> float:
+    """The pause after the `level`-th failed attempt in a row (1-based)."""
+    if level < 1:
+        return 0.0
+    return min(BACKOFF_FIRST_SECONDS * float(2 ** min(level - 1, 16)), BACKOFF_CAP_SECONDS)
+
+
+def failure_code(status: int) -> str | None:
+    """The stable code for a provider HTTP status, or None if it is no provider failure."""
+    if status in _PROVIDER_STATUSES:
+        return _PROVIDER_STATUSES[status]
+    if status in {408, 504}:
+        return "model_timeout"
+    if status == 429:
+        return "model_rate_limited"
+    if status >= 500:
+        return "model_server_error"
+    return None
+
+
+def transport_failure_code(error: BaseException) -> str:
+    if isinstance(error, httpx.TimeoutException):
+        return "model_timeout"
+    if isinstance(error, httpx.ConnectError | httpx.NetworkError):
+        return "model_unreachable"
+    return "model_transport_failed"
+
+
+def request_kind(request: httpx.Request) -> str:
+    """`embedding` for the embeddings route, `chat` for everything else."""
+    return "embedding" if request.url.path.rstrip("/").endswith("/embeddings") else "chat"
+
+
+@dataclass(frozen=True)
+class ModelBackoffState:
+    #: When the pause ends; None when no pause is in force.
+    until: datetime | None
+    #: Failed attempts in a row.
+    failures: int
+    #: The last failure's stable code (`model_auth_failed`, ...).
+    last_error: str | None
+    profile_id: str | None
+
+
+class ModelBackoffRefusal(httpx.TransportError):
+    """A request refused locally because the provider is being given a rest."""
+
+
+@dataclass(eq=False)
+class ModelAttempt:
+    """One job's write, as the provider saw it.
+
+    `failure` is the code of the first provider failure (or local refusal)
+    that happened while this write was in flight, None if there was none.
+    """
+
+    failure: str | None = None
+
+
+class ModelBackoff:
+    """Process-wide circuit breaker for the active model profile.
+
+    Thread-safe: the transport records from the SDK's own loop thread, the
+    drain asks from its claim thread, and status reads from the event loop.
+    """
+
+    def __init__(
+        self,
+        *,
+        clock: Callable[[], float] = time.monotonic,
+        wall_clock: Callable[[], datetime] = lambda: datetime.now(UTC),
+    ) -> None:
+        self._clock = clock
+        self._wall_clock = wall_clock
+        self._lock = threading.Lock()
+        #: Writes in flight (`attempt`); never cleared by a reset.
+        self._attempts: set[ModelAttempt] = set()
+        self._reset_locked()
+
+    def _reset_locked(self) -> None:
+        #: Which kinds of request are failing (`chat`, `embedding`): a working
+        #: embedding endpoint says nothing about a chat model that is gone.
+        self._failing: set[str] = set()
+        self._level = 0
+        self._failures = 0
+        self._until = 0.0
+        self._probe_until = 0.0
+        self._last_error: str | None = None
+        self._profile_id: str | None = None
+
+    def reset(self, reason: str = "model_configuration_changed") -> None:
+        """Forget every failure: the user changed what is being called."""
+        with self._lock:
+            was_paused = self._failures > 0
+            self._reset_locked()
+        if was_paused:
+            logger.info("model_backoff_reset reason=%s", reason)
+
+    def record_success(self, profile_id: str | None = None, kind: str = "model") -> None:
+        with self._lock:
+            if self._failures == 0:
+                return
+            if profile_id is not None and self._profile_id not in {None, profile_id}:
+                return
+            self._failing.discard(kind)
+            if self._failing:
+                return
+            self._reset_locked()
+        logger.info("model_backoff_cleared profile_id=%s", profile_id)
+
+    def record_failure(self, code: str, profile_id: str | None = None, kind: str = "model") -> None:
+        now = self._clock()
+        with self._lock:
+            if profile_id is not None and self._profile_id not in {None, profile_id}:
+                # Another profile's history says nothing about this one.
+                self._reset_locked()
+            self._profile_id = profile_id
+            self._failing.add(kind)
+            self._mark_attempts_locked(code)
+            self._failures += 1
+            self._last_error = code
+            self._probe_until = 0.0
+            # Requests that were already out when the pause began fail too;
+            # they are the same outage, not a reason to wait longer.
+            if now >= self._until:
+                self._level += 1
+                self._until = now + backoff_seconds(self._level)
+            level, pause = self._level, self._until - now
+        logger.warning(
+            "model_backoff_failure error_code=%s level=%d pause_s=%.0f profile_id=%s",
+            code,
+            level,
+            pause,
+            profile_id,
+        )
+
+    @contextmanager
+    def attempt(self) -> Iterator[ModelAttempt]:
+        """Hold one job's write open, and learn whether the provider failed it.
+
+        Every provider failure and every local refusal while the write is in
+        flight is charged to it. A request cannot be traced to the job that
+        made it: the SDK sends embeddings from one shared batching worker, so
+        neither the calling thread nor a context variable identifies the job.
+        Charging every write then in flight can name a write the provider did
+        not fail (another job's request failed beside it); that write waits
+        for the provider and is retried with the rest. It can never miss the
+        write the provider did fail, which would spend that job's retries on
+        an outage.
+        """
+        record = ModelAttempt()
+        with self._lock:
+            self._attempts.add(record)
+        try:
+            yield record
+        finally:
+            with self._lock:
+                self._attempts.discard(record)
+
+    def record_refusal(self) -> str:
+        """A request refused locally; charged to the writes in flight like a failure."""
+        with self._lock:
+            code = self._last_error or "model_transport_failed"
+            self._mark_attempts_locked(code)
+        return code
+
+    def _mark_attempts_locked(self, code: str) -> None:
+        for record in self._attempts:
+            if record.failure is None:
+                record.failure = code
+
+    def paused(self) -> bool:
+        with self._lock:
+            return self._failures > 0 and self._clock() < self._until
+
+    def refuses_requests(self, kind: str = "model") -> bool:
+        """Whether a request of this kind should not go out at all right now.
+
+        Only the failing kind is refused: a chat model that is gone must not
+        take recall's embedding calls down with it.
+        """
+        with self._lock:
+            return (
+                kind in self._failing
+                and self._failures >= REFUSE_IN_FLIGHT_AFTER
+                and self._clock() < self._until
+            )
+
+    def allowance(self, *, kind: str | None = None) -> int | None:
+        """How many matching provider jobs may be claimed now.
+
+        0 while paused; once the pause is over, one probe at a time until it
+        reports or `PROBE_HOLD_SECONDS` pass. ``kind`` keeps a failed chat
+        model from pausing raw-only work that needs embeddings, while an
+        embedding outage still paces that work.
+        """
+        now = self._clock()
+        with self._lock:
+            if self._failures == 0 or (kind is not None and kind not in self._failing):
+                return None
+            if now < self._until or now < self._probe_until:
+                return 0
+            self._probe_until = now + PROBE_HOLD_SECONDS
+            return 1
+
+    def state(self) -> ModelBackoffState:
+        now = self._clock()
+        with self._lock:
+            remaining = self._until - now if self._failures else 0.0
+            return ModelBackoffState(
+                until=(
+                    self._wall_clock() + timedelta(seconds=remaining) if remaining > 0 else None
+                ),
+                failures=self._failures,
+                last_error=self._last_error,
+                profile_id=self._profile_id,
+            )
+
+
+def next_retry_at(app: Any, state: str, own: str | None) -> str | None:
+    """When a queued job is tried next: its own retry wait, or the provider's pause.
+
+    While the breaker pauses, nothing is claimed at all, so the pause holds
+    every queued job, whatever it last failed with.
+    """
+    if state not in {"accepted", "pending"}:
+        return None
+    backoff = getattr(getattr(app, "state", None), "model_backoff", None)
+    until = backoff.state().until if isinstance(backoff, ModelBackoff) else None
+    paused = until.isoformat() if until is not None else None
+    candidates = [value for value in (own, paused) if value]
+    return max(candidates) if candidates else None
+
+
+class BackedOffModelTransport(httpx.AsyncBaseTransport):
+    """Report each provider exchange to the breaker; refuse while it confirms a pause."""
+
+    def __init__(
+        self,
+        backoff: ModelBackoff,
+        *,
+        profile_id: str,
+        inner: httpx.AsyncBaseTransport | None = None,
+    ) -> None:
+        self.backoff = backoff
+        self.profile_id = profile_id
+        self.inner = inner or httpx.AsyncHTTPTransport(retries=0, trust_env=False)
+
+    async def handle_async_request(self, request: httpx.Request) -> httpx.Response:
+        kind = request_kind(request)
+        if self.backoff.refuses_requests(kind):
+            self.backoff.record_refusal()
+            raise ModelBackoffRefusal("model_backoff_active", request=request)
+        try:
+            response = await self.inner.handle_async_request(request)
+        except ModelBackoffRefusal:
+            raise
+        except httpx.TransportError as error:
+            self.backoff.record_failure(transport_failure_code(error), self.profile_id, kind)
+            raise
+        code = failure_code(response.status_code)
+        if code is not None:
+            self.backoff.record_failure(code, self.profile_id, kind)
+        elif response.status_code < 400:
+            self.backoff.record_success(self.profile_id, kind)
+        return response
+
+    async def aclose(self) -> None:
+        await self.inner.aclose()

memhub/apps/core/src/one_memory/recall.py

@@ -135,6 +135,8 @@ class RecallReceipt(BaseModel):
     #: exists yet (`fallback_reason`). Raw hits are excerpts, not memories.
     mode: Literal["memory", "raw"] = "memory"
     fallback_reason: Literal["model_unavailable", "no_memories"] | None = None
+    #: Whose memories were searched: the request's `user_id`, else `local`.
+    user_id: str = DEFAULT_USER_ID
 
 
 class RecallTarget(Protocol):

memhub/apps/core/src/one_memory/recall_fallback.py

@@ -32,6 +32,19 @@ FallbackReason = Literal["model_unavailable", "no_memories"]
 #: caller). An empty set means the caller may read no raw conversation.
 RawSources = frozenset[str] | None
 
+#: What the whole recall request may take beyond the caller's own
+#: `timeout_ms`: the search keeps to that budget, but the checks around it
+#: (is a model configured, is the library empty, which raw sources) and the
+#: raw fallback need a little room of their own. Well under the broker's 15 s
+#: wait on Core, so a slow Core answers 504 before the broker gives up.
+RECALL_TOTAL_GRACE_SECONDS = 3.0
+RECALL_TOTAL_CEILING_SECONDS = 12.0
+
+
+def recall_total_timeout_seconds(timeout_ms: int) -> float:
+    """The most one recall request may take from start to answer."""
+    return min(timeout_ms / 1_000 + RECALL_TOTAL_GRACE_SECONDS, RECALL_TOTAL_CEILING_SECONDS)
+
 
 async def recall_with_fallback(
     request: RecallRequest,

memhub/apps/core/src/one_memory/sdk_memory_qa.py

@@ -33,7 +33,7 @@ from one_memory.model_profiles import (
 )
 from one_memory.sdk_search_options import SdkSearchFilters, SearchLane
 from one_memory.secrets import SecretStore, SecretStoreUnavailableError
-from one_memory.user_scope import owns
+from one_memory.user_scope import DEFAULT_USER_ID, owns
 
 _NO_GROUNDING = "现有记忆不足以回答这个问题。"
 _GROUNDING_LIMIT = 6
@@ -62,6 +62,8 @@ class SdkMemoryAnswer(BaseModel):
     answer: str
     memories: tuple[SdkAskMemory, ...]
     mode: Literal["generated", "extractive", "empty"]
+    #: Whose memories answered: the request's `user_id`, else `local`.
+    user_id: str = DEFAULT_USER_ID
 
 
 class _PromptMemory:

memhub/apps/core/src/one_memory/sdk_memory_runtime.py

@@ -25,7 +25,7 @@ from one_memory.hy_runtime_config import HY_MEMORY_READER
 from one_memory.hy_sdk_runtime import SdkClientHandle, sdk_relevance_floor
 from one_memory.hy_sdk_types import HySdkError, parse_sdk_search
 from one_memory.memory_queue import ExtractionWindowPreset, QueueDepths
-from one_memory.memory_server.durable_queue import COMPLETED, DurableWriteQueue
+from one_memory.memory_server.durable_queue import WAITING_FOR_MODEL, DurableWriteQueue
 from one_memory.sdk_write_processor import SdkWriteCoordinator
 from one_memory.semantic_deadline import SemanticMemoryHit
 
@@ -34,6 +34,10 @@ _STABLE_CODE = re.compile(r"[a-z][a-z0-9_]{0,95}")
 
 logger = logging.getLogger(__name__)
 
+#: Jobs not yet run that a suspended source holds back.
+_WAITING_STATES = frozenset({"pending", "waiting_for_model", "waiting_for_permission"})
+_WAITING_SQL = ",".join(f"'{state}'" for state in sorted(_WAITING_STATES))
+
 
 class SdkMemoryRuntime:
     """Product services that remain after legacy task/governance writes retire."""
@@ -48,12 +52,19 @@ class SdkMemoryRuntime:
         data_dir: Path,
         memory_mode: Callable[[], str] = lambda: "pro",
         writes_open: Callable[[], bool] = lambda: True,
+        source_active: Callable[[str], bool] = lambda _source_key: True,
     ) -> None:
         self.coordinator = coordinator
         #: The SDK mode, for the graph store's path (`hy_graph_admin`).
         self.memory_mode = memory_mode
         #: False while an embedding switch pauses model writes.
         self.writes_open = writes_open
+        #: Whether a queue lane's source may still become memories: the same
+        #: question the drain's claim asks of it. A lane that is off (the
+        #: user turned the source off, or its grant was revoked) has its
+        #: waiting jobs suspended: kept, never claimed, and not counted as
+        #: pending until the source is on again.
+        self.source_active = source_active
         self.read_handle = read_handle
         self.write_queue = write_queue
         self.extraction_settings = extraction_settings
@@ -241,22 +252,11 @@ class SdkMemoryRuntime:
         now = datetime.now(UTC)
         fresh_since = (now - timedelta(days=7)).isoformat()
         with main_database(self.write_queue.database_path).read() as database:
-            fresh = int(
-                database.execute(
-                    "SELECT COUNT(*) FROM memory_write_jobs "
-                    "WHERE state IN ('pending','waiting_for_model','waiting_for_permission') "
-                    "AND event_at>=?",
-                    (fresh_since,),
-                ).fetchone()[0]
-            )
-            backlog = int(
-                database.execute(
-                    "SELECT COUNT(*) FROM memory_write_jobs "
-                    "WHERE state IN ('pending','waiting_for_model','waiting_for_permission') "
-                    "AND event_at<?",
-                    (fresh_since,),
-                ).fetchone()[0]
-            )
+            rows = database.execute(
+                "SELECT source_key,event_at>=? AS fresh,COUNT(*) FROM memory_write_jobs "
+                f"WHERE state IN ({_WAITING_SQL}) GROUP BY source_key,fresh",
+                (fresh_since,),
+            ).fetchall()
             recent = tuple(
                 datetime.fromisoformat(str(row[0]))
                 for row in database.execute(
@@ -264,6 +264,9 @@ class SdkMemoryRuntime:
                     "ORDER BY updated_at DESC LIMIT 8"
                 )
             )
+        active = self._active_lanes({str(row[0]) for row in rows})
+        fresh = sum(int(row[2]) for row in rows if str(row[0]) in active and row[1])
+        backlog = sum(int(row[2]) for row in rows if str(row[0]) in active and not row[1])
         return QueueDepths(fresh=fresh, backlog=backlog, recent_completions=recent)
 
     def active_depths(self) -> tuple[int, int]:
@@ -276,13 +279,27 @@ class SdkMemoryRuntime:
         return running, running
 
     def status_counts(self) -> dict[str, int]:
+        """Jobs per state, with a suspended source's waiting jobs as `suspended`.
+
+        Those jobs keep their state in the table: suspension is the source's
+        switch, not the row's, so turning the source back on is all it takes
+        for the drain to claim them again, and nothing is moved or deleted.
+        """
         with main_database(self.write_queue.database_path).read() as database:
-            return {
-                str(row[0]): int(row[1])
-                for row in database.execute(
-                    "SELECT state,COUNT(*) FROM memory_write_jobs GROUP BY state"
-                )
-            }
+            rows = database.execute(
+                "SELECT source_key,state,COUNT(*) FROM memory_write_jobs GROUP BY source_key,state"
+            ).fetchall()
+        active = self._active_lanes({str(row[0]) for row in rows if str(row[1]) in _WAITING_STATES})
+        counts: dict[str, int] = {}
+        for source_key, state, count in rows:
+            name = str(state)
+            if name in _WAITING_STATES and str(source_key) not in active:
+                name = "suspended"
+            counts[name] = counts.get(name, 0) + int(count)
+        return counts
+
+    def _active_lanes(self, lanes: set[str]) -> set[str]:
+        return {lane for lane in lanes if self.source_active(lane)}
 
     def manual_batch_progress(self) -> tuple[int, int]:
         return 0, 0
@@ -291,33 +308,11 @@ class SdkMemoryRuntime:
         del task_ids
         return []
 
-    async def reconcile_unknown_outputs(
-        self,
-        *,
-        limit: int = 128,
-        exclude_error_codes: tuple[str, ...] = (),
-    ) -> int:
-        reconciled = 0
-        for job in await asyncio.to_thread(
-            self.write_queue.unknown_jobs,
-            limit=limit,
-            exclude_error_codes=exclude_error_codes,
-        ):
-            receipt = await self.coordinator.inquire_write_outcome(job.request_id)
-            if receipt is None:
-                continue
-            await asyncio.to_thread(
-                self.write_queue.settle,
-                job.job_id,
-                state=COMPLETED,
-                sdk_raw_ids=receipt.raw_ids,
-                sdk_memory_ids=receipt.memory_ids,
-            )
-            reconciled += 1
-        return reconciled
-
     async def resume_allowed(self) -> None:
-        await asyncio.to_thread(self.write_queue.readmit_parked)
+        await asyncio.to_thread(
+            self.write_queue.readmit_parked,
+            states=(WAITING_FOR_MODEL,),
+        )
 
     def accepted_backfill_status(self) -> None:
         return None

memhub/apps/core/src/one_memory/sdk_read_handle.py

@@ -17,9 +17,9 @@ task (one HTTP request, one retention pass).
 
 The memory mode (lite / pro / ultra) is fixed per SDK client, so a mode change
 rebuilds and retires the same way, and so do the SDK features
-(`memory_features`): handles are keyed by (space, profile, mode, features).
-Neither mode nor features names a collection; both are separate client
-parameters.
+(`memory_features`) and the SDK prompt language (`ui_language`): handles are
+keyed by (space, profile, mode, features, language). None of mode, features
+or language names a collection; each is a separate client parameter.
 """
 
 from __future__ import annotations
@@ -29,6 +29,7 @@ from collections.abc import Callable
 from pathlib import Path
 from typing import Any
 
+from one_memory.background_work import in_sdk_read
 from one_memory.embedding_health import EmbeddingGuardedClient, EmbeddingHealth
 from one_memory.embedding_spaces import (
     EmbeddingSpace,
@@ -42,6 +43,7 @@ from one_memory.hy_sdk_runtime import (
     SdkClientHandle,
     builtin_retrieval_snapshot,
     embedding_endpoint,
+    language_kwargs,
     retrieval_view,
 )
 from one_memory.hy_sdk_types import HySdkRuntimeError
@@ -50,8 +52,8 @@ from one_memory.model_profiles import ModelProfileSnapshot, ModelProfileStore, P
 from one_memory.secrets import SecretStore, SecretStoreUnavailableError
 
 _BUILTIN = (BUILTIN_RETRIEVAL_PROFILE_ID, 0)
-#: (space id, profile id, revision, memory mode, features)
-_HandleKey = tuple[str, str, int, str, FeatureOverrides]
+#: (space id, profile id, revision, memory mode, features, SDK language)
+_HandleKey = tuple[str, str, int, str, FeatureOverrides, str | None]
 
 
 class ActiveProfileReadHandle(SdkClientHandle):
@@ -67,6 +69,7 @@ class ActiveProfileReadHandle(SdkClientHandle):
         features: Callable[[], FeatureOverrides] = lambda: (),
         spaces: EmbeddingSpaceStore | None = None,
         health: EmbeddingHealth | None = None,
+        language: Callable[[], str | None] = lambda: None,
     ) -> None:
         super().__init__(builtin_retrieval_snapshot(), api_key=None, data_dir=data_dir)
         self.profiles = profiles
@@ -74,6 +77,7 @@ class ActiveProfileReadHandle(SdkClientHandle):
         self.data_dir = data_dir
         self.memory_mode = memory_mode
         self.current_features = features
+        self.current_language = language
         #: None only for a profile store without a database (test doubles).
         self.spaces = spaces if spaces is not None else registry_for(profiles)
         self.health = health or EmbeddingHealth()
@@ -90,6 +94,11 @@ class ActiveProfileReadHandle(SdkClientHandle):
         handle = await self.current_handle()
         return self._guarded(handle, await handle.client())
 
+    async def client_for_mode(self, mode: str) -> Any:
+        """Build/read with the caller's one mode snapshot, without rereading it."""
+        handle = await self.current_handle(mode=mode)
+        return self._guarded(handle, await handle.client())
+
     def _guarded(self, handle: SdkClientHandle, client: Any) -> Any:
         """A remote embedding's searches report `embedding_unavailable` (no fallback)."""
         profile = getattr(handle, "profile", None)
@@ -107,17 +116,26 @@ class ActiveProfileReadHandle(SdkClientHandle):
             ),
         )
 
-    async def current_handle(self) -> SdkClientHandle:
+    async def current_handle(self, *, mode: str | None = None) -> SdkClientHandle:
         """The handle of the live space, held for the asking task."""
-        space, identity = await asyncio.to_thread(self._resolve)
-        mode, features = self.memory_mode(), self.current_features()
-        key = (space.space_id if space is not None else "", *identity, mode, features)
+        space, identity = await in_sdk_read(self._resolve)
+        selected_mode, features = mode or self.memory_mode(), self.current_features()
+        language = self.current_language()
+        key = (
+            space.space_id if space is not None else "",
+            *identity,
+            selected_mode,
+            features,
+            language,
+        )
         async with self._handle_lock:
             handle = self._handles.get(key)
             if handle is None:
                 # Only on a change of space or profile: resolving a key can
                 # reach the system keychain, so it is not done on every read.
-                handle = await asyncio.to_thread(self._build, space, identity, mode, features)
+                handle = await in_sdk_read(
+                    self._build, space, identity, selected_mode, features, language
+                )
                 self._handles[key] = handle
             self._retired.update(value for name, value in self._handles.items() if name != key)
             self._handles = {key: handle}
@@ -204,10 +222,12 @@ class ActiveProfileReadHandle(SdkClientHandle):
         identity: tuple[str, int],
         mode: str,
         features: FeatureOverrides = (),
+        language: str | None = None,
     ) -> SdkClientHandle:
         # Without a registry (a profile store with no database) the handle
         # opens the space its profile names, exactly as before.
         named: dict[str, Any] = {"space": space} if space is not None else {}
+        named.update(language_kwargs(language))
         if identity == _BUILTIN:
             return SdkClientHandle(
                 builtin_retrieval_snapshot(),

memhub/apps/core/src/one_memory/sdk_write_processor.py

@@ -3,12 +3,15 @@
 from __future__ import annotations
 
 import asyncio
+import re
+import threading
 from collections.abc import AsyncIterator, Awaitable, Callable, Mapping, Sequence
 from contextlib import asynccontextmanager
 from dataclasses import dataclass
 from datetime import datetime
 from typing import Any
 
+from one_memory.background_work import in_sdk_write
 from one_memory.embedding_spaces import (
     EmbeddingSpace,
     EmbeddingSpaceStore,
@@ -16,14 +19,74 @@ from one_memory.embedding_spaces import (
     registry_for,
 )
 from one_memory.hy_graph_admin import effective_memory_mode
-from one_memory.hy_sdk_runtime import SdkClientHandle, builtin_retrieval_snapshot
+from one_memory.hy_sdk_runtime import (
+    SdkClientHandle,
+    builtin_retrieval_snapshot,
+    language_kwargs,
+    retrieval_view,
+)
 from one_memory.imports.models import EvidenceContentKind, EvidenceOrigin, EvidenceRecord
 from one_memory.input_sanitization import sanitize_model_input
 from one_memory.memory_features import FeatureOverrides
-from one_memory.model_profiles import ModelProfileSnapshot, ModelProfileStore
+from one_memory.model_profiles import ModelProfileSnapshot, ModelProfileStore, ProviderKind
 from one_memory.secrets import SecretStore, SecretStoreUnavailableError
 
 PRODUCT_AGENT_ID = "all-apps"
+
+#: SDK request ids whose write call is running on a thread right now. A write
+#: the drain gave up on (its work ceiling, a lost lease) keeps running on its
+#: thread; it must not be re-run beside itself (`recover_unknown`).
+_IN_FLIGHT: set[str] = set()
+_IN_FLIGHT_LOCK = threading.Lock()
+
+
+def sdk_write_in_flight(request_id: str) -> bool:
+    with _IN_FLIGHT_LOCK:
+        return request_id in _IN_FLIGHT
+
+
+class _Tracked:
+    """One SDK write call, held in `_IN_FLIGHT` from submission until it ends.
+
+    If the wait for it is cancelled before a thread picked it up, it is
+    abandoned: it will not start, and it leaves `_IN_FLIGHT` at once.
+    """
+
+    def __init__(self, request_id: str, work: Callable[..., Any]) -> None:
+        self.request_id = request_id
+        self.work = work
+        self.started = False
+        self.abandoned = False
+        with _IN_FLIGHT_LOCK:
+            _IN_FLIGHT.add(request_id)
+
+    def __call__(self, *args: Any, **kwargs: Any) -> Any:
+        with _IN_FLIGHT_LOCK:
+            if self.abandoned:
+                raise RuntimeError("hy_memory_write_abandoned")
+            self.started = True
+        try:
+            return self.work(*args, **kwargs)
+        finally:
+            with _IN_FLIGHT_LOCK:
+                _IN_FLIGHT.discard(self.request_id)
+
+    def abandon(self) -> None:
+        with _IN_FLIGHT_LOCK:
+            if not self.started:
+                self.abandoned = True
+                _IN_FLIGHT.discard(self.request_id)
+
+
+async def _write(tracked_id: str, work: Callable[..., Any], /, *args: Any, **kwargs: Any) -> Any:
+    call = _Tracked(tracked_id, work)
+    try:
+        return await in_sdk_write(call, *args, **kwargs)
+    except asyncio.CancelledError:
+        call.abandon()
+        raise
+
+
 _MESSAGE_ROLES = frozenset({"user", "assistant", "tool"})
 _CONVERSATION_ROLES = frozenset({"user", "assistant"})
 
@@ -50,7 +113,7 @@ class SdkWriteProcessor:
         records: tuple[EvidenceRecord, ...],
         *,
         request_id: str,
-        before_hy_invocation: Callable[[], Awaitable[None]],
+        before_hy_invocation: Callable[[bool], Awaitable[None]],
     ) -> SdkWriteReceipt:
         if not records:
             raise RuntimeError("hy_memory_task_without_inputs")
@@ -77,8 +140,9 @@ class SdkWriteProcessor:
 
         if extracted and not self._lite:
             contents = [sanitize_model_input(record.verbatim) for record in records]
-            await before_hy_invocation()
-            result = await asyncio.to_thread(
+            await before_hy_invocation(True)
+            result = await _write(
+                request_id,
                 client.add_extracted,
                 contents,
                 user_id=scope.user_id,
@@ -104,8 +168,9 @@ class SdkWriteProcessor:
             ]
             if not messages:
                 raise RuntimeError("hy_memory_task_without_inputs")
-            await before_hy_invocation()
-            result = await asyncio.to_thread(
+            await before_hy_invocation(not self._lite)
+            result = await _write(
+                request_id,
                 client.add,
                 messages,
                 user_id=scope.user_id,
@@ -126,7 +191,7 @@ class SdkWriteProcessor:
         if not request_id:
             raise ValueError("request_id is required")
         client = await self._client_handle.client()
-        outcome = await asyncio.to_thread(client.get_write_outcome, request_id)
+        outcome = await in_sdk_write(client.get_write_outcome, request_id)
         if outcome is None:
             return None
         if not isinstance(outcome, Mapping):
@@ -153,10 +218,11 @@ class SdkWriteCoordinator:
     the SharedRuntime closed mid-`add`, the job failed with AttributeError
     after HY was invoked, and it was left `unknown`.
 
-    Handles are keyed by profile, memory mode and the SDK features
-    (`memory_features`), so a mode or feature change retires handles the same
-    way. In lite no generation model is needed: without an
-    active profile the built-in local embedder writes raw turns.
+    Handles are keyed by profile, memory mode, the SDK features
+    (`memory_features`) and the SDK language (`ui_language`), so a mode,
+    feature or language change retires handles the same way. In lite no
+    generation model is needed: without an active profile the built-in
+    local embedder writes raw turns.
 
     `exclusive_for_evolve(user_id)` keeps evolve and that user's writes
     apart: it waits for the user's write in flight, and while it runs that
@@ -182,6 +248,7 @@ class SdkWriteCoordinator:
         memory_features: Callable[[], FeatureOverrides] = lambda: (),
         spaces: EmbeddingSpaceStore | None = None,
         writes_open: Callable[[], bool] = lambda: True,
+        sdk_language: Callable[[], str | None] = lambda: None,
     ) -> None:
         self.profiles = profiles
         self.secrets = secrets
@@ -190,8 +257,12 @@ class SdkWriteCoordinator:
         self.sedimentation_enabled = sedimentation_enabled
         self.memory_mode = memory_mode
         self.memory_features = memory_features
-        #: Keyed by (profile id, revision, space id, memory mode, features).
-        self._handles: dict[tuple[str, int, str, str, FeatureOverrides], SdkClientHandle] = {}
+        self.sdk_language = sdk_language
+        #: Keyed by (profile id, revision, space id, memory mode, features,
+        #: SDK language).
+        self._handles: dict[
+            tuple[str, int, str, str, FeatureOverrides, str | None], SdkClientHandle
+        ] = {}
         #: Users evolve (or the graph backfill) is running for, the writes in
         #: flight per user, and one exclusive run per user at a time. Writes
         #: of one user still run side by side; only evolve waits for them.
@@ -213,10 +284,8 @@ class SdkWriteCoordinator:
         records: tuple[EvidenceRecord, ...],
         *,
         request_id: str,
-        before_hy_invocation: Callable[[], Awaitable[None]],
+        before_hy_invocation: Callable[[bool], Awaitable[None]],
     ) -> SdkWriteReceipt:
-        if not self.sedimentation_enabled():
-            raise RuntimeError("model_sedimentation_disabled")
         if not self.writes_open():
             # An embedding switch paused writes: the drain puts the job back.
             raise RuntimeError("embedding_switch_in_progress")
@@ -227,9 +296,8 @@ class SdkWriteCoordinator:
         self._writing[user_id] = self._writing.get(user_id, 0) + 1
         try:
             async with self._active_handle() as handle:
-                return await SdkWriteProcessor(
-                    handle, lite=getattr(handle, "mode", None) == "lite"
-                ).process_sdk_job(
+                lite = getattr(handle, "mode", None) == "lite"
+                return await SdkWriteProcessor(handle, lite=lite).process_sdk_job(
                     records,
                     request_id=request_id,
                     before_hy_invocation=before_hy_invocation,
@@ -244,13 +312,13 @@ class SdkWriteCoordinator:
                 self._writes_idle.notify_all()
 
     async def retire_stale_handles(self) -> None:
-        """After a mode or feature change: retire handles built otherwise.
+        """After a mode, feature or language change: retire handles built otherwise.
 
         The idle ones close now. A handle still writing is closed when its
         last use ends (#218), so a write that started in the old mode, or
         with the old features, finishes in it.
         """
-        build = (self.memory_mode(), self.memory_features())
+        build = (self.memory_mode(), self.memory_features(), self.sdk_language())
         async with self._lock:
             stale = {key: handle for key, handle in self._handles.items() if key[3:] != build}
             for key in stale:
@@ -332,10 +400,17 @@ class SdkWriteCoordinator:
         """Use the active profile's handle; retire the others, closing the unused."""
         mode = self.memory_mode()
         features = self.memory_features()
+        language = self.sdk_language()
         profile_identity, profile, secret, space = await asyncio.to_thread(
             self._read_active_credentials, mode
         )
-        key = (*profile_identity, space.space_id if space is not None else "", mode, features)
+        key = (
+            *profile_identity,
+            space.space_id if space is not None else "",
+            mode,
+            features,
+            language,
+        )
         async with self._lock:
             handle = self._handles.get(key)
             if handle is None:
@@ -347,6 +422,7 @@ class SdkWriteCoordinator:
                     mode=mode,
                     features=features,
                     space=space,
+                    **language_kwargs(language),
                 )
                 self._handles[key] = handle
             self._retired.update(value for name, value in self._handles.items() if name != key)
@@ -388,24 +464,27 @@ class SdkWriteCoordinator:
             return (builtin.profile_id, builtin.revision), builtin, None, space
         identity = (space.profile_id, space.profile_revision)
         profile = self.profiles.snapshot(*identity)
-        try:
-            secret = self.profiles.resolve_snapshot_secret(*identity, self.secrets)
-        except SecretStoreUnavailableError:
-            raise RuntimeError("secure_storage_unavailable") from None
-        if profile.has_api_key and secret is None:
-            raise RuntimeError("model_secret_unavailable")
-        return identity, profile, secret, space
+        view = retrieval_view(profile)
+        secret: str | None = None
+        if view.embedding_provider_kind is ProviderKind.OPENAI_COMPATIBLE:
+            try:
+                secret = self.profiles.resolve_snapshot_secret(*identity, self.secrets)
+            except SecretStoreUnavailableError:
+                raise RuntimeError("secure_storage_unavailable") from None
+            if secret is None:
+                raise RuntimeError("model_secret_unavailable")
+        return identity, view, secret, space
 
     def _read_active_credentials(
         self,
         mode: str = "pro",
     ) -> tuple[tuple[str, int], ModelProfileSnapshot, str | None, EmbeddingSpace | None]:
+        if mode == "lite":
+            # A lite write is an embedding-only view of the live space. Never
+            # resolve or inject the generation model endpoint or its secret.
+            return self._lite_credentials()
         identity = self.profiles.active_identity()
         if identity is None:
-            if mode == "lite":
-                # lite stores raw turns with one embedding and calls no model:
-                # the live space's own, so they land where reads look.
-                return self._lite_credentials()
             raise RuntimeError("model_profile_not_active")
         profile = self.profiles.snapshot(*identity)
         space = self._live_space() if self.spaces is not None else None
@@ -491,11 +570,36 @@ def _is_extracted_content(record: EvidenceRecord) -> bool:
     )
 
 
+#: The SDK's stable failure codes are upper snake case (`RECONCILE_FAILED`).
+_SDK_FAILURE_CODE = re.compile(r"[A-Z][A-Z0-9_]{0,47}")
+
+
+def sdk_write_failure_code(value: Mapping[object, object]) -> str:
+    """The job's `error_code` for a failed SDK write: the SDK's own cause if it gave one.
+
+    hy-memory 2.0.13 names why a write failed: `agent_error_code`
+    (`LLM_ERROR`, `EMPTY_RESPONSE`, `JSON_PARSE_FAILED`, `EMBEDDING_FAILED`,
+    `RECONCILE_FAILED`) and, for a failed reconcile, `reconcile_error_code`
+    (`LLM_UNAVAILABLE`, `EMPTY_RESPONSE`, `JSON_PARSE_FAILED`,
+    `RECONCILE_EXCEPTION`). They become `hy_sdk_reconcile_empty_response`,
+    `hy_sdk_llm_error`, ... Without a recognisable code it stays
+    `hy_sdk_write_failed`. Only the code is kept, never the SDK's message.
+    """
+    reconcile = value.get("reconcile_error_code")
+    if isinstance(reconcile, str) and _SDK_FAILURE_CODE.fullmatch(reconcile):
+        cause = reconcile.removeprefix("RECONCILE_") or "FAILED"
+        return f"hy_sdk_reconcile_{cause.lower()}"
+    agent = value.get("agent_error_code")
+    if isinstance(agent, str) and _SDK_FAILURE_CODE.fullmatch(agent):
+        return f"hy_sdk_{agent.lower()}"
+    return "hy_sdk_write_failed"
+
+
 def _receipt_from_result(value: object) -> SdkWriteReceipt:
     if not isinstance(value, Mapping):
         raise RuntimeError("hy_sdk_write_receipt_shape_invalid")
     if value.get("success") is not True:
-        raise RuntimeError("hy_sdk_write_failed")
+        raise RuntimeError(sdk_write_failure_code(value))
 
     # Read only documented public receipt fields. ``variant`` identifies the
     # productivity namespace; IDs from both variants are canonical memory IDs.

memhub/apps/core/src/one_memory/ui_language.py

@@ -0,0 +1,77 @@
+"""The display language a person chose, and the SDK prompt language it implies.
+
+The App owns the choice (its language selector) and tells Core whenever it
+changes, so Core can build every SDK client with it. It is one global value in
+`config.json` (`ui_language`), beside `memory_mode` and `memory_features`;
+absent means no language was set (a CLI/API-only install, or
+`settings language system`). An App that follows the system sends the
+language it resolved and shows, not null.
+
+The owner's rule for the SDK:
+
+- Any supported code, zh-Hans and en included: pass it as
+  `MemoryConfig.language`, so extraction and the other prompts use that
+  language. Every display language is passed explicitly (#243).
+- No language at all (never set, as on a CLI/API-only install): pass no
+  language. The SDK keeps detecting Chinese or English from the text, exactly
+  as before this setting existed. The App does not leave it unset: it sends
+  the language it shows, including when it follows the system.
+
+The language never names a collection; a change rebuilds the SDK handles the
+way a mode or feature change does (#218 use count).
+
+No SDK import here: only `hy_sdk_runtime` and `hy_sdk_migration` import it.
+`config_state` imports this module, so it imports nothing from there.
+"""
+
+from __future__ import annotations
+
+from typing import Literal
+
+UiLanguage = Literal[
+    "en",
+    "zh-Hans",
+    "zh-Hant",
+    "ja",
+    "es",
+    "de",
+    "pt",
+    "fr",
+    "ko",
+    "ru",
+    "id",
+]
+UI_LANGUAGES: tuple[UiLanguage, ...] = (
+    "en",
+    "zh-Hans",
+    "zh-Hant",
+    "ja",
+    "es",
+    "de",
+    "pt",
+    "fr",
+    "ko",
+    "ru",
+    "id",
+)
+#: Codes earlier App builds stored, and the code each one is now.
+LEGACY_UI_LANGUAGES: dict[str, UiLanguage] = {"zh-CN": "zh-Hans"}
+#: What status shows when no language is passed to the SDK.
+SDK_LANGUAGE_AUTO = "auto"
+
+
+def normalize_ui_language(value: object) -> UiLanguage | None:
+    """A supported code (legacy ones mapped), or None for anything else."""
+    if not isinstance(value, str):
+        return None
+    value = LEGACY_UI_LANGUAGES.get(value, value)
+    return value if value in UI_LANGUAGES else None
+
+
+def sdk_language(ui_language: str | None) -> str | None:
+    """The `MemoryConfig.language` for a display language; None = SDK auto-detect.
+
+    Every supported code is passed as is; only an unset (or unknown) value
+    leaves the SDK to detect zh/en.
+    """
+    return normalize_ui_language(ui_language)

memhub/apps/core/src/one_memory/ui_projection.py

@@ -0,0 +1,283 @@
+"""Stable UI projections over the HY SDK's mode-specific storage shapes."""
+
+from __future__ import annotations
+
+import asyncio
+import re
+from datetime import UTC, datetime
+from typing import Any, Literal, cast
+
+from pydantic import BaseModel, ConfigDict, Field
+
+from one_memory.hy_sdk_types import (
+    HySdkMemoryPage,
+    HySdkMemoryRecord,
+    HySdkRawPage,
+    HySdkRawRecord,
+    raw_turn_messages,
+)
+from one_memory.imports.sources.parsing import unwrap_host_envelope_with_positions
+
+MemoryMode = Literal["lite", "pro", "ultra"]
+TimeBasis = Literal["conversation", "import", "write", "update"]
+ProjectionDisplayState = Literal["empty", "excerpt", "no_user_excerpt", "no_displayable_memory"]
+RAW_STATUSES = ("active", "shadow")
+HOME_PROJECTION_CANDIDATES = 10
+HOME_EXCERPT_CODEPOINTS = 200
+
+_SPACE = re.compile(r"\s+")
+_CONTROL_ONLY = re.compile(
+    r"^(?:"
+    r"<<?\s*(?:image|attachment|system[_-]?reminder|no[_ -]?content)\s*>>?"
+    r"|\[\s*(?:image|attachment|system[_ -]?reminder|no[_ -]?content)\s*\]"
+    r")$",
+    re.IGNORECASE,
+)
+
+
+class HomeProjectionCapabilities(BaseModel):
+    model_config = ConfigDict(frozen=True, extra="forbid")
+
+    content_plane: Literal["raw", "memory"]
+    generation_required: bool
+    graph_enabled: bool
+    evolve_available: bool
+
+
+class _HomeLatest(BaseModel):
+    model_config = ConfigDict(frozen=True, extra="forbid")
+
+    time: datetime | None
+    time_basis: TimeBasis | None
+    excerpt: str
+    truncated: bool
+    source_id: str
+
+
+class HomeRawLatest(_HomeLatest):
+    type: Literal["raw"] = "raw"
+    raw_id: str
+    session_id: str
+    display_state: Literal["excerpt", "no_user_excerpt"]
+
+
+class HomeMemoryLatest(_HomeLatest):
+    type: Literal["memory"] = "memory"
+    memory_id: str
+    scene: Literal["chat", "working", "coding"]
+    # scene=all lists chat rows and productivity experiences; facts are not
+    # part of that page or its total.
+    kind: Literal["chat", "experience"]
+    variant: Literal["working", "coding"] | None
+
+
+class HomeProjectionV1(BaseModel):
+    model_config = ConfigDict(frozen=True, extra="forbid")
+
+    projection_version: Literal[1] = 1
+    user_id: str
+    effective_mode: MemoryMode
+    capabilities: HomeProjectionCapabilities
+    visible_count: int = Field(ge=0)
+    display_state: ProjectionDisplayState
+    latest: HomeRawLatest | HomeMemoryLatest | None
+    observed_at: datetime
+
+
+def raw_list_filters(statuses: list[str] | tuple[str, ...] | None = None) -> dict[str, list[str]]:
+    """The one kept-raw definition shared by `/raw` and the home projection."""
+    return {
+        "layers": ["l1_raw"],
+        "statuses": list(statuses or RAW_STATUSES),
+    }
+
+
+def home_capabilities(mode: MemoryMode) -> HomeProjectionCapabilities:
+    return HomeProjectionCapabilities(
+        content_plane="raw" if mode == "lite" else "memory",
+        generation_required=mode != "lite",
+        graph_enabled=mode == "ultra",
+        evolve_available=mode == "ultra",
+    )
+
+
+def raw_user_excerpt(content: str, *, limit: int = HOME_EXCERPT_CODEPOINTS) -> tuple[str, bool]:
+    """Return only displayable user text from one SDK raw turn.
+
+    Role selection happens before wrapper removal, so assistant/system content
+    can never become a homepage excerpt after sanitization.
+    """
+    candidates: list[str] = []
+    for role, text in raw_turn_messages(content):
+        if role != "user":
+            continue
+        envelope = unwrap_host_envelope_with_positions(text)
+        if envelope.status == "ambiguous":
+            # An uncertain host envelope may contain system context. Showing
+            # nothing is safer than guessing which bytes the person authored.
+            continue
+        cleaned = envelope.text or ""
+        cleaned = _SPACE.sub(" ", cleaned).strip()
+        if not cleaned or _CONTROL_ONLY.fullmatch(cleaned):
+            continue
+        candidates.append(cleaned)
+    joined = " ".join(candidates)
+    return joined[:limit], len(joined) > limit
+
+
+def _epoch(value: int | None) -> datetime | None:
+    return datetime.fromtimestamp(value, tz=UTC) if value is not None else None
+
+
+def _raw_time(record: HySdkRawRecord) -> tuple[datetime | None, TimeBasis | None]:
+    if record.memory_at is not None:
+        return _epoch(record.memory_at), "conversation"
+    if record.gmt_created is not None:
+        return _epoch(record.gmt_created), "import"
+    return None, None
+
+
+def _memory_time(record: HySdkMemoryRecord) -> tuple[datetime | None, TimeBasis | None]:
+    # Exactly the scene=all merge key. `memory_at` is event time and does not
+    # decide which row list_memories returns first.
+    if record.sort_updated_at is not None:
+        return _epoch(record.sort_updated_at), "update"
+    written = record.gmt_created if record.scene == "chat" else record.created_at
+    if written is not None:
+        return _epoch(written), "write"
+    return None, None
+
+
+def _bounded(text: str) -> tuple[str, bool]:
+    flattened = _SPACE.sub(" ", text).strip()
+    return flattened[:HOME_EXCERPT_CODEPOINTS], len(flattened) > HOME_EXCERPT_CODEPOINTS
+
+
+def project_raw_latest(records: tuple[HySdkRawRecord, ...]) -> HomeRawLatest | None:
+    if not records:
+        return None
+    for record in records:
+        excerpt, truncated = raw_user_excerpt(record.content)
+        if excerpt:
+            at, basis = _raw_time(record)
+            return HomeRawLatest(
+                raw_id=record.raw_id,
+                session_id=record.session_id,
+                display_state="excerpt",
+                time=at,
+                time_basis=basis,
+                excerpt=excerpt,
+                truncated=truncated,
+                source_id=record.source,
+            )
+    newest = records[0]
+    at, basis = _raw_time(newest)
+    return HomeRawLatest(
+        raw_id=newest.raw_id,
+        session_id=newest.session_id,
+        display_state="no_user_excerpt",
+        time=at,
+        time_basis=basis,
+        excerpt="",
+        truncated=False,
+        source_id=newest.source,
+    )
+
+
+def project_memory_latest(
+    records: tuple[HySdkMemoryRecord, ...],
+) -> HomeMemoryLatest | None:
+    record = next(
+        (
+            item
+            for item in records
+            if item.kind in {"chat", "experience"}
+            and (
+                (item.kind == "chat" and item.scene == "chat" and item.variant is None)
+                or (
+                    item.kind == "experience"
+                    and item.scene in {"working", "coding"}
+                    and item.variant == item.scene
+                )
+            )
+        ),
+        None,
+    )
+    if record is None:
+        return None
+    excerpt, truncated = _bounded(record.content)
+    at, basis = _memory_time(record)
+    return HomeMemoryLatest(
+        memory_id=record.memory_id,
+        scene=record.scene,
+        kind=cast(Literal["chat", "experience"], record.kind),
+        variant=record.variant,
+        time=at,
+        time_basis=basis,
+        excerpt=excerpt,
+        truncated=truncated,
+        source_id=record.source or "",
+    )
+
+
+async def read_home_projection(
+    client: Any,
+    *,
+    user_id: str,
+    mode: MemoryMode,
+) -> HomeProjectionV1:
+    """Read one authoritative projection; any SDK/shape failure escapes."""
+    client_mode = getattr(client, "mode", mode)
+    if client_mode != mode:
+        raise RuntimeError("home_projection_mode_mismatch")
+    if mode == "lite":
+        raw = await asyncio.to_thread(
+            client.list_memories,
+            user_id=user_id,
+            **raw_list_filters(),
+            limit=HOME_PROJECTION_CANDIDATES,
+            offset=0,
+            order="desc",
+        )
+        raw_page = HySdkRawPage.from_memory_list(raw, limit=HOME_PROJECTION_CANDIDATES, offset=0)
+        visible_count = raw_page.total
+        raw_latest = project_raw_latest(raw_page.raw)
+        latest: HomeRawLatest | HomeMemoryLatest | None = raw_latest
+        display_state: ProjectionDisplayState = (
+            "empty"
+            if visible_count == 0
+            else raw_latest.display_state
+            if raw_latest is not None
+            else "no_user_excerpt"
+        )
+    else:
+        raw = await asyncio.to_thread(
+            client.list_memories,
+            user_id=user_id,
+            scene="all",
+            statuses=["active"],
+            limit=HOME_PROJECTION_CANDIDATES,
+            offset=0,
+            order="desc",
+        )
+        memory_page, _skipped = HySdkMemoryPage.from_sdk_skipping_invalid(
+            raw, limit=HOME_PROJECTION_CANDIDATES, offset=0
+        )
+        visible_count = memory_page.total
+        latest = project_memory_latest(memory_page.memories)
+        display_state = (
+            "empty"
+            if visible_count == 0
+            else "excerpt"
+            if latest is not None
+            else "no_displayable_memory"
+        )
+    return HomeProjectionV1(
+        user_id=user_id,
+        effective_mode=mode,
+        capabilities=home_capabilities(mode),
+        visible_count=visible_count,
+        display_state=display_state,
+        latest=latest,
+        observed_at=datetime.now(UTC),
+    )

memhub/apps/core/tests/TEST_INDEX.md

@@ -25,6 +25,7 @@
 | `test_c1_cross_source_session_isolation.py` | `contract` | Same session name in two sources must stay two conversations. |
 | `test_c1_damage_per_source.py` | `contract` | Damage and unknown schema, per source: a bad record must not sink the import. |
 | `test_c1_deepseek_profiles.py` | `contract` | DeepSeek Harness has two profiles; only the headless session form is importable. |
+| `test_c1_deepseek_versioned_sessions.py` | `contract` | DeepSeek Harness versions its session file names; every generation must import. |
 | `test_c1_import_event_matrix.py` | `contract` | C1 owned matrix: existing history, new file, append, truncate/replace, restart, revoke. |
 | `test_c1_import_failure_injection.py` | `contract` | C1 failure injection: atomic receipt, disk-full, read-only source, rotation. |
 | `test_c1_import_instrumentation.py` | `contract` | Instrumented import accounting: bytes read, opens, hashes, jobs, duplicates. |
@@ -110,6 +111,7 @@
 | `test_health.py` | `contract` | 覆盖 a backfill that fails says so rather than disappearing、a failed catch up leaves a traceback behind、configured model without content consent does not start backfill 等 15 个场景。 |
 | `test_hermes_gateway_injection.py` | `contract` | Hermes gateway text in `user` rows: notices are skipped, relayed messages unwrapped. |
 | `test_history_listing_rotation.py` | `contract` | 覆盖 history listing alternates started and untouched files、history listing drains whichever cohort is longer 场景。 |
+| `test_home_projection.py` | `contract` | 覆盖 memory projection covers pro and ultra、memory projection preserves productivity namespace、project raw latest uses import time without conversation time 等 7 个场景。 |
 | `test_host_capabilities.py` | `unit` | A plugin does not become realtime on every host or every unknown version. |
 | `test_hourly_c1_peak_replay_contract.py` | `contract` | Guard the package peak-replay probe's error accounting. |
 | `test_hourly_c1_recall_stage_probe_contract.py` | `contract` | Guard the packaged recall stage probe's command and error semantics. |
@@ -189,6 +191,7 @@
 | `test_memory_write_registry.py` | `contract` | A3-01: acceptance and outcome recording for the unified write path. |
 | `test_memory_write_routes.py` | `integration` | A3-01: the HTTP write entry, tested against a real FastAPI app. |
 | `test_migrate_off_sqlite.py` | `contract` | A1-06: the migration is only done when reconciliation agrees. |
+| `test_model_backoff.py` | `contract` | A broken model configuration must not turn a backlog into a request storm (#245). |
 | `test_model_creation_api.py` | `integration` | Normal protected model creation routes with temporary data and in-memory secrets. |
 | `test_model_creation_operations.py` | `contract` | 覆盖 lookup without table is read only and legacy create does not initialize、operation commits with profile and version without autoactivation、any replay conflicts before secret put 等 21 个场景。 |
 | `test_model_creation_validation_boundary.py` | `integration` | Real ASGI validation must precede creation reservation and secret writes. |
@@ -304,6 +307,7 @@
 | `test_sync_facade.py` | `contract` | A2: the sync facade must keep the sync shape call sites already use. |
 | `test_tail_metadata_lane.py` | `contract` | Post-response metadata retries must be bounded and never block the route. |
 | `test_two_level_discovery.py` | `contract` | 3925a kernel item 1: two-level discovery. |
+| `test_ui_language.py` | `contract` | The App's display language, and the SDK prompt language it implies. |
 | `test_ui_session.py` | `contract` | 覆盖 exchange is single use and creates a session、expired exchange cannot create a session、exchange is bound to the core instance 等 5 个场景。 |
 | `test_ui_session_api.py` | `integration` | 覆盖 ui session exchange sets httponly strict cookie、ui session requires bearer for exchange、ui session reports missing web assets 场景。 |
 | `test_unanswered_turn.py` | `contract` | BUG-06: which conversations end on a question nobody answered. |
@@ -317,4 +321,4 @@
 | `test_workspace_recall.py` | `contract` | Workspace memories were unreachable from every host; these pin the way in. |
 | `test_write_queue_lease_renewal.py` | `contract` | Rule 8: a lease must outlive the work it covers, and be renewed while it runs. |
 
-共 312 个测试文件。
+共 316 个测试文件。

memhub/apps/core/tests/core_test_classification.py

@@ -14,8 +14,8 @@ from pathlib import Path
 import pytest
 
 PRIMARY_MARKERS = ("unit", "contract", "integration", "performance", "live")
-EXPECTED_TEST_FILE_COUNT = 312
-EXPECTED_TEST_FILES_SHA256 = "7d0dc6efd88d71d5275bea8016a0ff087ff7568abcb8fd01e5f82c77a08a484f"
+EXPECTED_TEST_FILE_COUNT = 316
+EXPECTED_TEST_FILES_SHA256 = "011482974a26e9d43ba03bb88cbd168e645175beacd96c02ff642bc17dac49da"
 
 # Pure transformations, validation models, parity checks and state machines.
 # This list is intentionally small: uncertain files default to contract.

memhub/apps/core/tests/test_async_bridge.py

@@ -324,3 +324,48 @@ def test_saturated_raw_reads_do_not_delay_memory_reads() -> None:
     finally:
         release_raw.set()
         shutdown_bulk_pool()
+
+
+def test_recall_reads_answer_while_every_sdk_write_thread_is_stuck() -> None:
+    """A write that hangs in the SDK keeps its thread, not recall's (#231)."""
+    from one_memory.background_work import SDK_WRITE_WORKERS, in_sdk_read, in_sdk_write
+
+    stuck = threading.Barrier(SDK_WRITE_WORKERS + 1)
+    release = threading.Event()
+
+    def hung_write() -> None:
+        stuck.wait(timeout=2)
+        assert release.wait(5)
+
+    async def scenario() -> tuple[float, int]:
+        writes = [asyncio.create_task(in_sdk_write(hung_write)) for _ in range(SDK_WRITE_WORKERS)]
+        # One more than the pool holds: it waits for a write thread, as the
+        # drain's next write would.
+        queued = asyncio.create_task(in_sdk_write(lambda: None))
+        await asyncio.to_thread(stuck.wait, 2)
+        started = time.monotonic()
+        answer = await asyncio.wait_for(in_sdk_read(lambda: 7), 1)
+        elapsed = time.monotonic() - started
+        assert not queued.done()
+        release.set()
+        await asyncio.gather(*writes, queued)
+        return elapsed, answer
+
+    try:
+        elapsed, answer = asyncio.run(scenario())
+        assert answer == 7
+        assert elapsed < 0.2
+    finally:
+        release.set()
+        shutdown_bulk_pool()
+
+
+def test_sdk_writes_run_on_their_own_bounded_threads() -> None:
+    from one_memory.background_work import SDK_WRITE_WORKERS, in_sdk_write, sdk_write_pool
+
+    try:
+        name = asyncio.run(in_sdk_write(lambda: threading.current_thread().name))
+        assert name.startswith("one-memory-sdk-write")
+        assert sdk_write_pool()._max_workers == SDK_WRITE_WORKERS
+    finally:
+        shutdown_bulk_pool()

memhub/apps/core/tests/test_c1_deepseek_versioned_sessions.py

@@ -0,0 +1,246 @@
+"""DeepSeek Harness versions its session file names; every generation must import.
+
+The first format writes `<session>/session.jsonl[.zstd]`; v3 and v4 write
+`session.v3.jsonl.zstd` / `session.v4.jsonl.zstd`. Discovery used to match only
+the two unversioned names, so every v3/v4 session was invisible to the import
+job — `discovered 0` while the files sat on disk. These tests pin the file-name
+contract, the header gate that keeps an unknown future version out of the
+database, and the upgrade path where a library imported before the fix picks up
+the versioned files on its next scan.
+"""
+
+import json
+from pathlib import Path
+
+import pytest
+import zstandard
+
+from one_memory.imports.adapters import ScanFailure, ScanIssueCode
+from one_memory.imports.sources import deepseek_harness
+from one_memory.imports.sources.deepseek_harness import (
+    DEEPSEEK_HARNESS_DESCRIPTOR,
+    create_deepseek_harness_adapter,
+)
+from tests.test_secondary_source_adapters import (
+    _cursors,
+    _evidence,
+    _evidence_text,
+    _grant,
+    _scan,
+    _skip_codes,
+)
+
+
+def _write_session(directory: Path, name: str, records: list[dict[str, object]]) -> None:
+    directory.mkdir(parents=True, exist_ok=True)
+    payload = "".join(f"{json.dumps(record)}\n" for record in records).encode()
+    (directory / name).write_bytes(zstandard.ZstdCompressor().compress(payload))
+
+
+def _conversation(version: int | None, *, directory: str = "run-a") -> list[dict[str, object]]:
+    header: dict[str, object] = {
+        "type": "session",
+        "version": version,
+        "id": directory,
+        "cwd": "/private/versioned-project",
+    }
+    return [
+        header,
+        {
+            "type": "user/message",
+            "seq": 1,
+            "data": {
+                "id": "human",
+                "role": "user",
+                "source": {"kind": "user"},
+                "content": [{"type": "text", "text": "visible human"}],
+            },
+        },
+        {
+            "type": "assistant/message",
+            "seq": 2,
+            "data": {
+                "message": {
+                    "id": "assistant",
+                    "role": "assistant",
+                    "content": [{"type": "text", "text": "visible assistant"}],
+                }
+            },
+        },
+    ]
+
+
+def _session_adapter(tmp_path: Path):
+    root = tmp_path / "dsh"
+    root.mkdir(parents=True, exist_ok=True)
+    return root, create_deepseek_harness_adapter(
+        _grant(DEEPSEEK_HARNESS_DESCRIPTOR.source_id, root, tmp_path)
+    )
+
+
+def test_versioned_v4_session_file_is_discovered_and_imported(tmp_path: Path) -> None:
+    root, adapter = _session_adapter(tmp_path)
+    session = root / "run-v4"
+    records = _conversation(4, directory="run-v4")
+    records.append(
+        {
+            "type": "tool/result",
+            "seq": 3,
+            "time": 1793341068763,
+            "data": {
+                "callId": "call-1",
+                "message": {"role": "tool", "content": [{"type": "text", "text": "tool output"}]},
+            },
+        }
+    )
+    _write_session(session, "session.v4.jsonl.zstd", records)
+    # A rotated backup next to the live file must not be imported as a second copy.
+    (session / "session.v4.jsonl.zstd.orig-20261027").write_bytes(
+        zstandard.ZstdCompressor().compress(b'{"type":"session","version":4}\n')
+    )
+
+    events = _scan(adapter)
+
+    assert _evidence_text(events) == ["visible human", "visible assistant", "tool output"]
+    evidence = _evidence(events)
+    assert {event.evidence.project for event in evidence} == {"versioned-project"}
+    assert {event.evidence.conversation_id for event in evidence} == {"run-v4"}
+
+
+def test_versioned_v3_session_file_is_discovered_and_imported(tmp_path: Path) -> None:
+    root, adapter = _session_adapter(tmp_path)
+    _write_session(root / "run-v3", "session.v3.jsonl.zstd", _conversation(3))
+
+    events = _scan(adapter)
+
+    assert _evidence_text(events) == ["visible human", "visible assistant"]
+
+
+def _tool_result(content: list[dict[str, object]]) -> dict[str, object]:
+    return {
+        "type": "tool/result",
+        "seq": 3,
+        "data": {"callId": "call-1", "message": {"role": "tool", "content": content}},
+    }
+
+
+def test_tool_output_imports_in_either_block_shape(tmp_path: Path) -> None:
+    """`tool/result` output written as `text` blocks used to be dropped.
+
+    Only `tool-result` blocks were read, so a session that writes plain `text`
+    blocks lost every tool output. Both shapes must arrive, in any generation.
+    """
+    root, adapter = _session_adapter(tmp_path)
+    v3 = _conversation(3, directory="run-v3-text")
+    v3.append(_tool_result([{"type": "text", "text": "v3 text output"}]))
+    _write_session(root / "run-v3-text", "session.v3.jsonl.zstd", v3)
+    v0 = _conversation(0, directory="run-v0-block")
+    v0.append(_tool_result([{"type": "tool-result", "content": "v0 block output"}]))
+    _write_session(root / "run-v0-block", "session.jsonl.zstd", v0)
+
+    texts = _evidence_text(_scan(adapter))
+
+    assert "v3 text output" in texts
+    assert "v0 block output" in texts
+
+
+def test_text_tool_output_is_scrubbed_like_block_output(tmp_path: Path) -> None:
+    root, adapter = _session_adapter(tmp_path)
+    secret = "sk-" + "a" * 40
+    records = _conversation(4, directory="run-secret")
+    records.append(_tool_result([{"type": "text", "text": f"token {secret} " + "x" * 5000}]))
+    _write_session(root / "run-secret", "session.v4.jsonl.zstd", records)
+
+    tool = _evidence_text(_scan(adapter))[-1]
+
+    assert secret not in tool
+    assert len(tool) < 2000
+
+
+def test_session_file_names_outside_the_contract_are_not_imported(tmp_path: Path) -> None:
+    root, adapter = _session_adapter(tmp_path)
+    for name in (
+        "session.v4.jsonl.zstd.orig-20261027",
+        "session.vx.jsonl.zstd",
+        "other.v4.jsonl.zstd",
+        "session.v4.json",
+    ):
+        _write_session(root / name.replace(".", "-"), name, _conversation(4))
+
+    assert _evidence(_scan(adapter)) == []
+
+
+def test_unknown_future_session_version_imports_nothing(tmp_path: Path) -> None:
+    root, adapter = _session_adapter(tmp_path)
+    records = _conversation(5)
+    records.append(
+        {
+            "type": "user/message",
+            "seq": 9,
+            "data": {
+                "id": "future",
+                "role": "user",
+                "source": {"kind": "user"},
+                "content": [{"type": "text", "text": "future generation payload"}],
+            },
+        }
+    )
+    _write_session(root / "run-v5", "session.v5.jsonl.zstd", records)
+
+    events = _scan(adapter)
+
+    assert _evidence(events) == []
+    assert ScanIssueCode.UNSUPPORTED_SCHEMA in _skip_codes(events)
+
+
+def test_unknown_session_version_is_reported_and_read_once_supported(
+    tmp_path: Path, monkeypatch: pytest.MonkeyPatch
+) -> None:
+    """Not importing a future format yet must stay "yet".
+
+    A cursor left behind by the refused scan would put the whole session behind
+    the checkpoint, so the release that learns the format would read nothing.
+    """
+    root, adapter = _session_adapter(tmp_path)
+    _write_session(root / "run-v5", "session.v5.jsonl.zstd", _conversation(5))
+
+    refused = _scan(adapter)
+
+    assert _cursors(refused) == {}
+    assert [event.reason_code for event in refused if isinstance(event, ScanFailure)] == [
+        ScanIssueCode.UNSUPPORTED_SCHEMA
+    ]
+
+    monkeypatch.setattr(deepseek_harness, "SUPPORTED_SESSION_VERSIONS", frozenset({0, 3, 4, 5}))
+    _, upgraded = _session_adapter(tmp_path)
+
+    assert _evidence_text(_scan(upgraded, cursors=_cursors(refused))) == [
+        "visible human",
+        "visible assistant",
+    ]
+
+
+def test_upgrade_scan_rediscovers_versioned_files_already_on_disk(tmp_path: Path) -> None:
+    """A library imported before this fix must pick up the files on its next scan.
+
+    The first scan sees only the unversioned session that the old predicate
+    matched; after the upgrade, the versioned file next to it is discovered by
+    the next scan while the already imported session stays deduplicated by the
+    cursor it left behind.
+    """
+    root, adapter = _session_adapter(tmp_path)
+    old = root / "run-old"
+    _write_session(old, "session.jsonl.zstd", _conversation(0, directory="run-old"))
+    first_scan = _scan(adapter)
+    assert _evidence_text(first_scan) == ["visible human", "visible assistant"]
+    assert _evidence(first_scan)[0].evidence.conversation_id == "run-old"
+
+    versioned = root / "run-v4"
+    _write_session(versioned, "session.v4.jsonl.zstd", _conversation(4, directory="run-v4"))
+    cursors = _cursors(first_scan)
+    assert cursors  # the old session left a cursor behind
+
+    upgrade_scan = _scan(adapter, cursors=cursors)
+
+    assert _evidence_text(upgrade_scan) == ["visible human", "visible assistant"]
+    assert {event.evidence.conversation_id for event in _evidence(upgrade_scan)} == {"run-v4"}

memhub/apps/core/tests/test_embedding_switch_api.py

@@ -263,6 +263,48 @@ def test_a_switch_over_the_api_pauses_writes_and_keeps_intake(tmp_path, backend)
     asyncio.run(scenario())
 
 
+def test_graph_backfill_blocks_starting_an_embedding_switch(tmp_path, backend):
+    backend.store.put(
+        builtin_base(),
+        512,
+        {"m1": ("memory", "local")},
+        model="bge-small-zh-v1.5",
+    )
+
+    async def scenario():
+        app = application(tmp_path)
+        async with app.router.lifespan_context(app), client_for(app) as client:
+            await recovered(client)
+            profile = remote_profile(app)
+            plan = (
+                await client.post(
+                    "/api/v1/embedding-switches/plan",
+                    json={"profile_id": profile.profile_id},
+                )
+            ).json()
+            hold = asyncio.Event()
+            task = asyncio.create_task(hold.wait())
+            app.state.memory_graph_backfill._task = task
+            try:
+                response = await client.post(
+                    "/api/v1/embedding-switches",
+                    json={
+                        "profile_id": profile.profile_id,
+                        "expected_revision": profile.revision,
+                        "plan_token": plan["plan_token"],
+                    },
+                )
+                assert response.status_code == 409
+                assert response.json()["detail"] == "memory_lifecycle_busy"
+                assert app.state.embedding_switch.writes_open() is True
+            finally:
+                task.cancel()
+                await asyncio.gather(task, return_exceptions=True)
+                app.state.memory_graph_backfill._task = None
+
+    asyncio.run(scenario())
+
+
 def test_cancel_over_the_api(tmp_path, backend):
     backend.store.put(builtin_base(), 512, {f"m{i}": (f"m {i}", "local") for i in range(4)})
 

memhub/apps/core/tests/test_harness_contract_suite.py

@@ -193,7 +193,7 @@ def _qwenwork() -> Harness:
 
 def _deepseek() -> Harness:
     def write(path: Path, turns: list[Turn]) -> None:
-        # deepseek only accepts a file literally named session.jsonl, and nests
+        # deepseek only accepts files named session[.vN].jsonl[.zstd], and nests
         # the turn under "data".
         lines: list[dict] = [{"type": "session", "version": 0, "id": "s1", "cwd": "/w"}]
         for index, (role, text, _session) in enumerate(turns):
@@ -225,7 +225,7 @@ def _deepseek() -> Harness:
 
     from one_memory.imports.sources.deepseek_harness import create_deepseek_harness_adapter
 
-    # deepseek accepts only a file literally named session.jsonl.
+    # deepseek accepts only session[.vN].jsonl[.zstd]; the first format is used here.
     return Harness(
         "deepseek-harness",
         write,

memhub/apps/core/tests/test_home_projection.py

@@ -0,0 +1,397 @@
+from __future__ import annotations
+
+import asyncio
+
+import pytest
+from fastapi.testclient import TestClient
+from pydantic import SecretStr
+
+from one_memory.api import create_app
+from one_memory.config import Settings
+from one_memory.hy_sdk_types import HySdkReadError
+from one_memory.ui_projection import (
+    HOME_PROJECTION_CANDIDATES,
+    project_raw_latest,
+    raw_user_excerpt,
+    read_home_projection,
+)
+
+
+def raw_row(
+    raw_id: str,
+    content: str,
+    *,
+    status: str = "active",
+    memory_at: int | None = 1_700_000_000,
+    created: int | None = 1_699_000_000,
+) -> dict[str, object]:
+    return {
+        "memory_id": raw_id,
+        "content": content,
+        "layer": "l1_raw",
+        "status": status,
+        "user_id": "local",
+        "agent_id": "all-apps",
+        "session_id": f"session-{raw_id}",
+        "source": "cursor",
+        "memory_at": memory_at,
+        "gmt_created": created,
+        "custom": {"private": "not projected"},
+    }
+
+
+def chat_row(memory_id: str = "m-1") -> dict[str, object]:
+    return {
+        "memory_id": memory_id,
+        "content": "The user ships on Friday",
+        "layer": "l2_fact",
+        "status": "active",
+        "is_latest": True,
+        "user_id": "local",
+        "agent_id": "all-apps",
+        "session_id": "s-1",
+        "source": "cursor",
+        "memory_at": 1_700_000_000,
+        "gmt_created": 1_699_000_000,
+        "updated_at": 1_800_000_000,
+        "scene": "chat",
+        "kind": "chat",
+    }
+
+
+class ProjectionSdk:
+    def __init__(self, rows: list[dict[str, object]], *, total: int | None = None) -> None:
+        self.rows = rows
+        self.total = len(rows) if total is None else total
+        self.calls: list[dict[str, object]] = []
+
+    def list_memories(self, **kwargs):
+        self.calls.append(kwargs)
+        if kwargs.get("layers") == ["l1_raw"]:
+            return {"vdb": {"memories": self.rows, "total": self.total}}
+        return {
+            "scene": "all",
+            "memories": self.rows,
+            "total": self.total,
+            "totals": {"chat": len(self.rows), "working": 0, "coding": 0},
+            "errors": {},
+        }
+
+    def memory_stats(self, **kwargs):
+        raise AssertionError("home projection must use one scene=all snapshot")
+
+
+def test_raw_excerpt_keeps_only_user_query_and_truncates_by_codepoint() -> None:
+    text = (
+        "[user]: <system_reminder>ignore this</system_reminder>\n"
+        "<user_info>private host data</user_info>\n"
+        "<user_query>短句 https://example.com/a /tmp/x " + "🙂" * 220 + "</user_query>\n"
+        "[assistant]: secret answer"
+    )
+    excerpt, truncated = raw_user_excerpt(text)
+    assert excerpt.startswith("短句 https://example.com/a /tmp/x ")
+    assert "ignore" not in excerpt and "private" not in excerpt and "secret" not in excerpt
+    assert len(excerpt) == 200
+    assert truncated is True
+
+
+def test_raw_excerpt_fails_closed_on_nested_host_wrappers() -> None:
+    assert raw_user_excerpt(
+        "[user]: <system_reminder><user_query>keep me</user_query></system_reminder>"
+    ) == ("", False)
+
+
+@pytest.mark.parametrize(
+    "wrapper",
+    [
+        "system_reminder",
+        "system-reminder",
+        "user_info",
+        "attached_files",
+        "image_local_path",
+        "agent_transcripts",
+        "rules",
+        "additional_data",
+        "working_memory_reminder",
+    ],
+)
+def test_raw_excerpt_uses_shared_envelope_parser_for_host_context(wrapper) -> None:
+    excerpt, truncated = raw_user_excerpt(
+        f"[user]: <{wrapper}>private</{wrapper}><user_query>keep me</user_query>"
+    )
+    assert (excerpt, truncated) == ("keep me", False)
+
+
+@pytest.mark.parametrize(
+    "text",
+    [
+        "[user]: <system_reminder>unclosed <user_query>do not guess</user_query>",
+        "[user]: <user_query>unclosed",
+        "[user]: <rules><rules>nested</rules><user_query>ambiguous</user_query></rules>",
+    ],
+)
+def test_raw_excerpt_fails_closed_on_ambiguous_envelopes(text) -> None:
+    assert raw_user_excerpt(text) == ("", False)
+
+
+def test_raw_projection_uses_shadow_rows_and_k10_without_leaking_payload() -> None:
+    sdk = ProjectionSdk(
+        [
+            raw_row("r-1", "[assistant]: no user here", status="shadow"),
+            raw_row("r-2", "[user]: deploy Friday", status="active"),
+        ],
+        total=42,
+    )
+    result = asyncio.run(read_home_projection(sdk, user_id="local", mode="lite"))
+    assert result.visible_count == 42
+    assert result.latest is not None and result.latest.type == "raw"
+    assert result.latest.raw_id == "r-2"
+    assert result.latest.excerpt == "deploy Friday"
+    assert result.latest.time_basis == "conversation"
+    assert result.display_state == "excerpt"
+    assert sdk.calls == [
+        {
+            "user_id": "local",
+            "layers": ["l1_raw"],
+            "statuses": ["active", "shadow"],
+            "limit": HOME_PROJECTION_CANDIDATES,
+            "offset": 0,
+            "order": "desc",
+        }
+    ]
+    assert set(result.latest.model_dump()) == {
+        "type",
+        "raw_id",
+        "session_id",
+        "display_state",
+        "time",
+        "time_basis",
+        "excerpt",
+        "truncated",
+        "source_id",
+    }
+    serialized = result.model_dump(mode="json")
+    assert serialized["projection_version"] == 1
+    assert serialized["latest"]["time"].endswith("Z")
+    assert "content" not in serialized["latest"]
+
+
+def test_raw_projection_reports_no_user_excerpt_when_k_has_none() -> None:
+    sdk = ProjectionSdk([raw_row("r-1", "[assistant]: answer")])
+    result = asyncio.run(read_home_projection(sdk, user_id="local", mode="lite"))
+    assert result.latest is not None and result.latest.type == "raw"
+    assert result.latest.raw_id == "r-1"
+    assert result.latest.display_state == "no_user_excerpt"
+    assert result.latest.excerpt == ""
+
+
+@pytest.mark.parametrize(
+    ("mode", "graph", "evolve"),
+    [("pro", False, False), ("ultra", True, True)],
+)
+def test_memory_projection_covers_pro_and_ultra(mode, graph, evolve) -> None:
+    sdk = ProjectionSdk([chat_row()], total=9)
+    result = asyncio.run(read_home_projection(sdk, user_id="local", mode=mode))
+    assert result.visible_count == 9
+    assert result.display_state == "excerpt"
+    assert result.capabilities.content_plane == "memory"
+    assert result.capabilities.graph_enabled is graph
+    assert result.capabilities.evolve_available is evolve
+    assert result.latest is not None and result.latest.type == "memory"
+    assert result.latest.memory_id == "m-1"
+    assert result.latest.time_basis == "update"
+    assert result.latest.time.isoformat() == "2027-01-15T08:00:00+00:00"
+
+
+def test_chat_projection_prefers_gmt_modified_when_the_sdk_supplies_it() -> None:
+    row = {**chat_row(), "gmt_modified": 1_810_000_000}
+    result = asyncio.run(read_home_projection(ProjectionSdk([row]), user_id="local", mode="pro"))
+    assert result.latest is not None
+    assert result.latest.time_basis == "update"
+    assert result.latest.time.timestamp() == 1_810_000_000
+
+
+def test_memory_projection_uses_productivity_updated_at() -> None:
+    row = {
+        "kind": "experience",
+        "experience_id": "e-1",
+        "task": "Release",
+        "solution": "Run tests",
+        "scene": "working",
+        "status": "active",
+        "user_id": "local",
+        "agent_id": "all-apps",
+        "source": "manual",
+        "memory_at": 1_600_000_000,
+        "created_at": 1_700_000_000,
+        "updated_at": 1_710_000_000,
+    }
+    result = asyncio.run(read_home_projection(ProjectionSdk([row]), user_id="local", mode="pro"))
+    assert result.latest is not None and result.latest.type == "memory"
+    assert (result.latest.scene, result.latest.kind, result.latest.variant) == (
+        "working",
+        "experience",
+        "working",
+    )
+    assert result.latest.time_basis == "update"
+    assert result.latest.time.isoformat() == "2024-03-09T16:00:00+00:00"
+
+
+@pytest.mark.parametrize(
+    "row",
+    [
+        {**chat_row(), "updated_at": None},
+        {
+            "kind": "experience",
+            "experience_id": "e-1",
+            "task": "Release",
+            "solution": "Run tests",
+            "scene": "coding",
+            "status": "active",
+            "user_id": "local",
+            "agent_id": "all-apps",
+            "source": "manual",
+            "created_at": 1_700_000_000,
+            "updated_at": None,
+        },
+    ],
+)
+def test_memory_projection_sort_time_falls_back_to_scene_creation(row) -> None:
+    result = asyncio.run(read_home_projection(ProjectionSdk([row]), user_id="local", mode="pro"))
+    assert result.latest is not None
+    assert result.latest.time_basis == "write"
+    expected = row.get("gmt_created") or row.get("created_at")
+    assert result.latest.time.timestamp() == expected
+
+
+def test_fact_is_not_a_home_scene_all_item() -> None:
+    row = {
+        "kind": "fact",
+        "fact_id": "f-1",
+        "statement": "Uses pytest",
+        "scene": "coding",
+        "status": "active",
+        "user_id": "local",
+        "agent_id": "all-apps",
+        "source": "manual",
+        "created_at": 1_700_000_000,
+    }
+    result = asyncio.run(read_home_projection(ProjectionSdk([row]), user_id="local", mode="pro"))
+    assert result.visible_count == 1
+    assert result.latest is None
+    assert result.display_state == "no_displayable_memory"
+
+
+def test_invalid_latest_uses_next_parseable_candidate_from_same_snapshot() -> None:
+    sdk = ProjectionSdk(
+        [
+            {"memory_id": "broken", "content": "", "scene": "chat", "kind": "chat"},
+            chat_row("m-2"),
+        ],
+        total=2,
+    )
+    result = asyncio.run(read_home_projection(sdk, user_id="local", mode="pro"))
+    assert result.visible_count == 2
+    assert result.latest is not None and result.latest.memory_id == "m-2"
+    assert len(sdk.calls) == 1
+
+
+def test_scene_all_rejects_boolean_total() -> None:
+    sdk = ProjectionSdk([chat_row()])
+    sdk.total = True  # type: ignore[assignment]
+    with pytest.raises(HySdkReadError):
+        asyncio.run(read_home_projection(sdk, user_id="local", mode="pro"))
+
+
+def test_projection_read_failure_is_not_converted_to_an_empty_projection() -> None:
+    class Broken:
+        def list_memories(self, **kwargs):
+            raise OSError("down")
+
+    with pytest.raises(OSError, match="down"):
+        asyncio.run(read_home_projection(Broken(), user_id="local", mode="lite"))
+
+
+def test_projection_refuses_a_client_built_for_another_mode() -> None:
+    sdk = ProjectionSdk([chat_row()])
+    sdk.mode = "lite"
+    with pytest.raises(RuntimeError, match="home_projection_mode_mismatch"):
+        asyncio.run(read_home_projection(sdk, user_id="local", mode="pro"))
+
+
+def test_home_projection_route_maps_whole_read_failure_to_503(tmp_path, monkeypatch) -> None:
+    class Broken:
+        def list_memories(self, **kwargs):
+            raise OSError("down")
+
+    class Handle:
+        async def client(self):
+            return Broken()
+
+    app = create_app(
+        Settings(
+            _env_file=None,
+            data_dir=tmp_path / "data",
+            source_home=tmp_path,
+            api_token=SecretStr("test"),
+            imports_enabled=False,
+            automatic_memory_processing=False,
+            live_sync_enabled=False,
+        ),
+        source_catalog={},
+    )
+    monkeypatch.setattr("one_memory.api._sdk_client_handle", lambda _app: Handle())
+    with TestClient(app, headers={"Authorization": "Bearer test"}) as client:
+        response = client.get("/api/v2/home-projection")
+    assert response.status_code == 503
+    assert response.json() == {"detail": "home_projection_read_failed"}
+
+
+def test_home_projection_reads_mode_once_and_matches_the_client(tmp_path, monkeypatch) -> None:
+    sdk = ProjectionSdk([chat_row()])
+    sdk.mode = "pro"
+
+    class Handle:
+        async def client(self):
+            return sdk
+
+    app = create_app(
+        Settings(
+            _env_file=None,
+            data_dir=tmp_path / "data",
+            source_home=tmp_path,
+            api_token=SecretStr("test"),
+            imports_enabled=False,
+            automatic_memory_processing=False,
+            live_sync_enabled=False,
+        ),
+        source_catalog={},
+    )
+    reads = 0
+
+    def mode(_app):
+        nonlocal reads
+        reads += 1
+        return "pro"
+
+    with TestClient(app, headers={"Authorization": "Bearer test"}) as client:
+        monkeypatch.setattr("one_memory.api._memory_mode", mode)
+        monkeypatch.setattr("one_memory.api._sdk_client_handle", lambda _app: Handle())
+        response = client.get("/api/v2/home-projection")
+    assert response.status_code == 200, response.text
+    assert response.json()["effective_mode"] == "pro"
+    assert reads == 1
+
+
+def test_project_raw_latest_uses_import_time_without_conversation_time() -> None:
+    from one_memory.hy_sdk_types import HySdkRawRecord
+
+    record = HySdkRawRecord.from_sdk(
+        {
+            **raw_row("r-1", "[user]: hello", memory_at=None),
+            "raw_id": "r-1",
+        }
+    )
+    latest = project_raw_latest((record,))
+    assert latest is not None
+    assert latest.time_basis == "import"

memhub/apps/core/tests/test_live_capture.py

@@ -298,7 +298,7 @@ def test_hook_job_completes_after_file_identity_adoption(tmp_path) -> None:
                     assert current is not None
                     assert ingest_journal.matches_current(connection, current)
                 connection.rollback()
-            await before_hy_invocation()
+            await before_hy_invocation(True)
             return SdkWriteReceipt()
 
     drain = DurableWriteDrain(queue, execute=lambda _job: None)

memhub/apps/core/tests/test_main_database_access.py

@@ -336,6 +336,79 @@ def test_main_database_warns_when_wal_stays_above_the_high_water_mark(
     assert any("main_database_wal_high" in record.message for record in caplog.records)
 
 
+def test_a_wal_whose_frames_are_all_checkpointed_is_not_reported_high(
+    tmp_path, monkeypatch, caplog
+):
+    """#245: the alert judges frames still waiting, not the file's size."""
+    path = _database(tmp_path)
+    database = main_database(path)
+    monkeypatch.setattr(_access, "MAIN_DATABASE_CHECKPOINT_WRITE_INTERVAL", 1)
+    # One page: any frame left uncopied would cross it, a fully copied WAL not.
+    monkeypatch.setattr(_access, "MAIN_DATABASE_WAL_WARN_BYTES", 1)
+    caplog.set_level("WARNING", logger="one_memory.database_access")
+
+    with database.write() as db, db:
+        db.execute("UPDATE counter SET value = 1 WHERE id = 1")
+
+    assert database._wal_bytes() > 0
+    assert not any("main_database_wal_high" in record.message for record in caplog.records)
+
+
+def test_the_writer_caps_the_wal_it_leaves_behind(tmp_path):
+    path = _database(tmp_path)
+    with main_database(path).write() as db:
+        limit = db.execute("PRAGMA journal_size_limit").fetchone()[0]
+    assert limit == _access.MAIN_DATABASE_JOURNAL_SIZE_LIMIT_BYTES
+
+
+def test_an_idle_checkpoint_shrinks_the_wal_after_a_large_burst(tmp_path, monkeypatch):
+    """#245: a WAL that grew once used to stay that size for good."""
+    path = _database(tmp_path)
+    database = main_database(path)
+    # No cadence checkpoint during the burst: the WAL has to grow.
+    monkeypatch.setattr(_access, "MAIN_DATABASE_CHECKPOINT_WRITE_INTERVAL", 10_000_000)
+    monkeypatch.setattr(_access, "MAIN_DATABASE_CHECKPOINT_SECONDS", 10_000_000.0)
+    database._last_checkpoint_at = time.monotonic()
+    with database.write() as db, db:
+        db.execute("PRAGMA wal_autocheckpoint = 0")
+        db.execute("CREATE TABLE blobs (body BLOB)")
+        db.executemany(
+            "INSERT INTO blobs VALUES (randomblob(?))", [(64 * 1024,) for _ in range(1_500)]
+        )
+    with database.write() as db:
+        db.execute("PRAGMA wal_autocheckpoint = 1000")
+    grown = database._wal_bytes()
+    assert grown > _access.MAIN_DATABASE_JOURNAL_SIZE_LIMIT_BYTES
+
+    with database.read() as reader:
+        reader.execute("SELECT COUNT(*) FROM blobs").fetchone()
+        # Someone is reading: no truncate is even attempted.
+        assert database.checkpoint_if_idle() is None
+    assert _access.checkpoint_idle_main_databases() == 1
+
+    assert database._wal_bytes() <= _access.MAIN_DATABASE_JOURNAL_SIZE_LIMIT_BYTES
+    with database.read() as reader:
+        assert reader.execute("SELECT COUNT(*) FROM blobs").fetchone() == (1_500,)
+
+
+def test_a_busy_idle_checkpoint_is_skipped_not_raised(tmp_path):
+    path = _database(tmp_path)
+    database = main_database(path)
+    with database.write() as db, db:
+        db.execute("UPDATE counter SET value = 1 WHERE id = 1")
+    # Another process's reader holds a snapshot: TRUNCATE cannot finish.
+    outsider = sqlite3.connect(path)
+    try:
+        outsider.execute("BEGIN")
+        outsider.execute("SELECT value FROM counter").fetchone()
+        result = database.checkpoint_if_idle()
+        assert result is None or result[0] == 1
+    finally:
+        outsider.close()
+    assert database.checkpoint_if_idle() == (0, 0, 0)
+    assert database._wal_bytes() == 0
+
+
 def test_main_database_maintenance_checkpoint_does_not_break_an_active_reader(
     tmp_path, monkeypatch
 ):

memhub/apps/core/tests/test_memory_additions.py

@@ -293,6 +293,7 @@ def test_sdk_user_profile_http_returns_native_assembled_profile(tmp_path):
             response = await client.get("/api/v2/user-profile")
             assert response.status_code == 200, response.text
             assert response.json() == {
+                "user_id": "local",
                 "request_id": "profile-request",
                 "profile": {
                     "memory_id": "l0-head",
@@ -660,6 +661,8 @@ def test_memory_add_routes_do_not_collide_with_single_memory_routes(tmp_path):
                 "task_id",
                 "memory_ids",
                 "error",
+                "error_code",
+                "next_retry_at",
             }
             status = await client.get(f"/api/v2/memories/additions/{request_id}")
             assert status.json()["evidence_id"] == created.json()["evidence_id"]

memhub/apps/core/tests/test_memory_features.py

@@ -28,6 +28,8 @@ from one_memory.memory_features import (
     FEATURE_NAMES,
     FEATURES,
     FEATURES_BY_NAME,
+    PARAMETERS,
+    SETTING_NAMES,
     MemoryFeatures,
     effective_features,
     feature_activity,
@@ -46,15 +48,20 @@ TODAY = {
     "session_episodes": False,
     "episode_summary": False,
     "intention": True,
+    "intention_dedup": True,
     "few_shot": False,
 }
+#: The same for the numeric settings.
+TODAY_PARAMETERS = {"intention_dedup_threshold": 0.95}
 
 
 @pytest.fixture(autouse=True)
 def _clean_sdk_env(monkeypatch):
     """The SDK's own env vars feed its defaults; tests start without them."""
-    for spec in FEATURES:
+    for spec in (*FEATURES, *PARAMETERS):
         monkeypatch.delenv(spec.env, raising=False)
+    # The threshold falls back to the SDK's shared dedup variable.
+    monkeypatch.delenv("MEMORY_DEDUP_THRESHOLD", raising=False)
     monkeypatch.delenv("ONE_MEMORY_GRAPH_STORE", raising=False)
 
 
@@ -95,17 +102,25 @@ def _field(config, name: str) -> bool:
 
 
 def test_the_document_names_exactly_the_catalog() -> None:
-    assert tuple(MemoryFeatures.model_fields) == FEATURE_NAMES
+    assert tuple(MemoryFeatures.model_fields) == SETTING_NAMES
     assert set(TODAY) == set(FEATURE_NAMES)
     # Each feature is a MemoryConfig field the SDK has; no env var is written.
     defaults = hy_sdk_runtime.sdk_feature_defaults()
-    assert set(defaults) == set(FEATURE_NAMES)
+    assert set(defaults) == set(SETTING_NAMES)
 
 
 def test_the_defaults_are_todays_behaviour() -> None:
-    assert hy_sdk_runtime.sdk_feature_defaults() == TODAY
+    everything = {**TODAY, **TODAY_PARAMETERS}
+    assert hy_sdk_runtime.sdk_feature_defaults() == everything
     assert MemoryFeatures().overrides() == ()
-    assert effective_features((), TODAY) == TODAY
+    assert effective_features((), everything) == everything
+
+
+@pytest.mark.parametrize("profile", PROFILES, ids=("builtin", "remote"))
+def test_intention_dedup_defaults_to_on_at_095_in_the_built_config(tmp_path, profile) -> None:
+    config = _config(tmp_path, profile)
+    assert config.recall.intention_dedup_enabled is True
+    assert config.recall.intention_dedup_threshold == 0.95
 
 
 def test_the_sdk_env_var_still_moves_the_default_of_an_unset_feature(monkeypatch) -> None:
@@ -126,6 +141,32 @@ def test_unknown_or_non_boolean_values_are_refused() -> None:
         )
 
 
+@pytest.mark.parametrize("bad", (0.79, 1.01, -1, 2, True, "0.9", float("nan"), float("inf")))
+def test_an_intention_dedup_threshold_outside_its_range_is_refused(bad) -> None:
+    with pytest.raises(ValidationError):
+        MemoryFeatures.model_validate({"intention_dedup_threshold": bad})
+
+
+def test_the_intention_dedup_threshold_range_is_inclusive() -> None:
+    for value in (0.8, 0.9, 1, 1.0):
+        document = MemoryFeatures.model_validate({"intention_dedup_threshold": value})
+        assert document.overrides() == (("intention_dedup_threshold", float(value)),)
+    with pytest.raises(ValueError, match="invalid_memory_feature_value"):
+        hy_sdk_runtime.build_sdk_config(
+            PROFILES[0],
+            api_key=None,
+            data_dir=Path("/tmp/unused"),
+            features={"intention_dedup_threshold": 0.5},
+        )
+
+
+def test_the_sdk_env_vars_still_move_the_threshold_default(monkeypatch) -> None:
+    monkeypatch.setenv("MEMORY_DEDUP_THRESHOLD", "0.9")
+    assert hy_sdk_runtime.sdk_feature_defaults()["intention_dedup_threshold"] == 0.9
+    monkeypatch.setenv("MEMORY_INTENTION_DEDUP_THRESHOLD", "0.97")
+    assert hy_sdk_runtime.sdk_feature_defaults()["intention_dedup_threshold"] == 0.97
+
+
 def test_merge_sets_resets_and_leaves_absent_keys_alone() -> None:
     saved = MemoryFeatures(graph_rerank=True, few_shot=True)
     update = MemoryFeatures.model_validate({"few_shot": None, "episode_recall": True})
@@ -165,6 +206,20 @@ def test_each_feature_reaches_the_built_memory_config(tmp_path, profile) -> None
                 assert _field(config, other.name) is TODAY[other.name], (spec.name, other.name)
 
 
+@pytest.mark.parametrize("profile", PROFILES, ids=("builtin", "remote"))
+def test_intention_dedup_on_off_and_threshold_reach_the_built_memory_config(
+    tmp_path, profile
+) -> None:
+    off = _config(tmp_path, profile, {"intention_dedup": False})
+    assert off.recall.intention_dedup_enabled is False
+    assert off.recall.intention_dedup_threshold == 0.95
+    on = _config(tmp_path, profile, {"intention_dedup": True, "intention_dedup_threshold": 0.9})
+    assert on.recall.intention_dedup_enabled is True
+    assert on.recall.intention_dedup_threshold == 0.9
+    # Nothing else moves.
+    assert _field(on, "intention") is True and _field(on, "graph_rerank") is False
+
+
 @pytest.mark.parametrize("profile", PROFILES, ids=("builtin", "remote"))
 def test_nothing_set_is_the_config_of_before_byte_for_byte(tmp_path, profile) -> None:
     before = repr(dataclasses.asdict(_config(tmp_path, profile)))
@@ -172,6 +227,8 @@ def test_nothing_set_is_the_config_of_before_byte_for_byte(tmp_path, profile) ->
     assert repr(dataclasses.asdict(_config(tmp_path, profile, {}))) == before
     # Setting every feature to its default value changes nothing either.
     assert repr(dataclasses.asdict(_config(tmp_path, profile, TODAY))) == before
+    everything = {**TODAY, **TODAY_PARAMETERS}
+    assert repr(dataclasses.asdict(_config(tmp_path, profile, everything))) == before
 
 
 @pytest.mark.parametrize("profile", PROFILES, ids=("builtin", "remote"))
@@ -190,6 +247,7 @@ def test_features_never_change_the_collection_identity(tmp_path, profile) -> Non
         {name: True for name in FEATURE_NAMES},
         {name: False for name in FEATURE_NAMES},
         {"graph_rerank": True, "episode_recall": True},
+        {"intention_dedup": False, "intention_dedup_threshold": 0.8},
     ):
         assert identity(_config(tmp_path, profile, values)) == baseline
 
@@ -243,6 +301,13 @@ def test_a_feature_needing_a_higher_mode_is_reported_inactive() -> None:
     series = effective_features((("same_series_timeline", True), ("graph_rerank", True)), TODAY)
     assert feature_activity("same_series_timeline", series, "pro") == "requires_ultra"
     assert feature_activity("same_series_timeline", series, "ultra") is None
+    defaults = {**TODAY, **TODAY_PARAMETERS}
+    assert feature_activity("intention_dedup", defaults, "pro") is None
+    assert feature_activity("intention_dedup_threshold", defaults, "pro") is None
+    assert feature_activity("intention_dedup_threshold", defaults, "lite") == "requires_pro"
+    off = effective_features((("intention_dedup", False),), defaults)
+    assert feature_activity("intention_dedup", off, "pro") == "disabled"
+    assert feature_activity("intention_dedup_threshold", off, "pro") == "requires_intention_dedup"
 
 
 # --- rebuilding handles -------------------------------------------------------
@@ -459,6 +524,11 @@ def test_features_api_get_put_reset_and_status(tmp_path, monkeypatch) -> None:
             "episode_recall": True,
         }
 
+        monkeypatch.setattr(
+            app.state.model_profile_store,
+            "active_identity",
+            lambda: ("active-profile", 1),
+        )
         await client.put("/api/v1/settings/memory-mode", json={"mode": "ultra"})
         await app.state.memory_graph_backfill.wait()
         ultra = _by_name((await client.get("/api/v1/settings/memory-features")).json())
@@ -497,3 +567,99 @@ def test_features_api_get_put_reset_and_status(tmp_path, monkeypatch) -> None:
         assert (await client.get("/api/v1/settings/memory-features")).json()["non_default"] == {}
 
     run_app(tmp_path, monkeypatch, scenario)
+
+
+@pytest.mark.fresh_sdk
+def test_intention_dedup_api_on_off_threshold_and_422(tmp_path, monkeypatch) -> None:
+    built: list[tuple[bool, float]] = []
+    original = hy_sdk_runtime.build_sdk_config
+
+    def recording(*args, **kwargs):
+        config = original(*args, **kwargs)
+        built.append(
+            (config.recall.intention_dedup_enabled, config.recall.intention_dedup_threshold)
+        )
+        return config
+
+    monkeypatch.setattr(hy_sdk_runtime, "build_sdk_config", recording)
+
+    def built_now(app) -> tuple[bool, float]:
+        """What a client built with the read handle's current key carries."""
+        recording(
+            hy_sdk_runtime.builtin_retrieval_snapshot(),
+            api_key=None,
+            data_dir=tmp_path,
+            features=app.state.sdk_client_handle.current_features(),
+        )
+        return built[-1]
+
+    async def scenario(app, client):
+        path = "/api/v1/settings/memory-features"
+        current = (await client.get(path)).json()
+        dedup = _by_name(current)["intention_dedup"]
+        assert dedup["enabled"] is True and dedup["default"] is True
+        assert dedup["configured"] is None and dedup["active"] is True
+        assert dedup["sdk_field"] == "recall.intention_dedup_enabled"
+        assert dedup["env"] == "MEMORY_INTENTION_DEDUP_ENABLED"
+        (threshold,) = current["parameters"]
+        assert threshold == {
+            "name": "intention_dedup_threshold",
+            "value": 0.95,
+            "configured": None,
+            "default": 0.95,
+            "minimum": 0.8,
+            "maximum": 1.0,
+            "active": True,
+            "reason": None,
+            "requires_feature": "intention_dedup",
+            "sdk_field": "recall.intention_dedup_threshold",
+            "env": "MEMORY_INTENTION_DEDUP_THRESHOLD",
+            "description": threshold["description"],
+        }
+        assert built_now(app) == (True, 0.95)
+
+        off = await client.put(path, json={"intention_dedup": False})
+        assert off.status_code == 200, off.text
+        body = off.json()
+        assert body["changed"] == ["intention_dedup"]
+        assert body["non_default"] == {"intention_dedup": False}
+        assert body["parameters"][0]["active"] is False
+        assert body["parameters"][0]["reason"] == "requires_intention_dedup"
+        assert app.state.sdk_write_coordinator.memory_features() == (("intention_dedup", False),)
+        assert built_now(app) == (False, 0.95)
+
+        on = (
+            await client.put(path, json={"intention_dedup": True, "intention_dedup_threshold": 0.9})
+        ).json()
+        assert on["changed"] == ["intention_dedup", "intention_dedup_threshold"]
+        assert on["non_default"] == {"intention_dedup_threshold": 0.9}
+        assert on["parameters"][0]["value"] == 0.9 and on["parameters"][0]["active"] is True
+        expected = (("intention_dedup", True), ("intention_dedup_threshold", 0.9))
+        assert app.state.sdk_client_handle.current_features() == expected
+        assert built_now(app) == (True, 0.9)
+        processing = (await client.get("/api/v1/memory-processing")).json()
+        assert processing["pipeline"]["features"] == {"intention_dedup_threshold": 0.9}
+        saved = json.loads((tmp_path / "data" / "config.json").read_text())
+        assert saved["memory_features"] == {
+            "intention_dedup": True,
+            "intention_dedup_threshold": 0.9,
+        }
+
+        for bad in (0.5, 0.79, 1.5, -0.1, "0.9", True):
+            response = await client.put(path, json={"intention_dedup_threshold": bad})
+            assert response.status_code == 422, bad
+        assert (await client.put(path, json={"intention_dedup": "false"})).status_code == 422
+        # A refused body changes nothing.
+        assert app.state.sdk_client_handle.current_features() == expected
+
+        reset = (
+            await client.put(
+                path, json={"intention_dedup": None, "intention_dedup_threshold": None}
+            )
+        ).json()
+        assert reset["changed"] == ["intention_dedup_threshold"]
+        assert reset["non_default"] == {}
+        assert app.state.sdk_client_handle.current_features() == ()
+        assert built_now(app) == (True, 0.95)
+
+    run_app(tmp_path, monkeypatch, scenario)

memhub/apps/core/tests/test_memory_mode_and_evolve.py

@@ -41,6 +41,8 @@ from one_memory.memory_evolution import (
     EvolveScheduler,
     EvolveService,
     EvolveStateStore,
+    GraphBuildState,
+    GraphBuildUser,
     MemoryGraphBackfill,
     evolve_due,
 )
@@ -58,8 +60,10 @@ def test_mode_defaults_to_pro_and_the_env_still_forces_ultra(tmp_path, monkeypat
     monkeypatch.delenv("ONE_MEMORY_GRAPH_STORE", raising=False)
     store = ConfigStore(tmp_path)
     assert store.memory_mode() == "pro"
+    assert store.memory_mode_explicitly_configured() is False
     assert effective_memory_mode(store.memory_mode()) == "pro"
     store.set_memory_mode("lite")
+    assert store.memory_mode_explicitly_configured() is True
     assert ConfigStore(tmp_path).memory_mode() == "lite"
     assert json.loads((tmp_path / "config.json").read_text())["memory_mode"] == "lite"
     monkeypatch.setenv("ONE_MEMORY_GRAPH_STORE", "kuzu")
@@ -70,6 +74,21 @@ def test_mode_defaults_to_pro_and_the_env_still_forces_ultra(tmp_path, monkeypat
         store.set_memory_mode("max")  # type: ignore[arg-type]
 
 
+def test_old_config_defaults_to_implicit_pro_until_pro_is_explicitly_set(tmp_path) -> None:
+    (tmp_path / "config.json").write_text(
+        json.dumps({"schema_version": 1, "sources": {}}), encoding="utf-8"
+    )
+    store = ConfigStore(tmp_path)
+    assert store.memory_mode() == "pro"
+    assert store.memory_mode_explicitly_configured() is False
+
+    store.set_memory_mode("pro")
+
+    assert store.memory_mode_explicitly_configured() is True
+    assert json.loads((tmp_path / "config.json").read_text())["memory_mode"] == "pro"
+    assert ConfigStore(tmp_path).memory_mode_explicitly_configured() is True
+
+
 def test_an_untouched_install_writes_no_new_settings(tmp_path) -> None:
     store = ConfigStore(tmp_path)
     store.set_sync("cursor", True)
@@ -158,6 +177,37 @@ def test_the_read_handle_rebuilds_on_a_mode_or_profile_change(monkeypatch, tmp_p
     asyncio.run(scenario())
 
 
+def test_read_handle_can_bind_one_caller_mode_snapshot(monkeypatch, tmp_path) -> None:
+    from one_memory import sdk_read_handle
+
+    callback_reads = 0
+
+    def current_mode() -> str:
+        nonlocal callback_reads
+        callback_reads += 1
+        return "pro"
+
+    monkeypatch.setattr(
+        sdk_read_handle,
+        "SdkClientHandle",
+        lambda profile, **kwargs: _FakeHandle(kwargs.get("mode") or "pro", profile.profile_id),
+    )
+    reads = sdk_read_handle.ActiveProfileReadHandle(
+        profiles=_Profiles(identity=None),  # type: ignore[arg-type]
+        secrets=None,  # type: ignore[arg-type]
+        data_dir=tmp_path,
+        memory_mode=current_mode,
+    )
+
+    async def scenario():
+        client = await reads.client_for_mode("lite")
+        assert client.mode == "lite"
+        await reads.close()
+
+    asyncio.run(scenario())
+    assert callback_reads == 0
+
+
 class _FakeHandle:
     def __init__(self, mode: str, profile_id: str = "p") -> None:
         self.mode = mode
@@ -288,7 +338,7 @@ class _SdkHandle:
         return None
 
 
-async def _noop() -> None:
+async def _noop(_requires_generation: bool) -> None:
     return None
 
 
@@ -311,14 +361,14 @@ def test_a_note_in_lite_is_stored_as_raw_and_never_calls_add_extracted() -> None
     ]
 
 
-def test_a_lite_write_runs_through_the_coordinator_without_a_model(monkeypatch) -> None:
+def test_a_lite_write_ignores_the_model_sedimentation_pause(monkeypatch) -> None:
     sdk = _WritingSdk()
     coordinator = sdk_write_processor.SdkWriteCoordinator(
         profiles=_Profiles(identity=None),  # type: ignore[arg-type]
         secrets=None,  # type: ignore[arg-type]
         data_dir=None,
         transport_factory=lambda _profile: None,
-        sedimentation_enabled=lambda: True,
+        sedimentation_enabled=lambda: False,
         memory_mode=lambda: "lite",
     )
     monkeypatch.setattr(
@@ -335,6 +385,37 @@ def test_a_lite_write_runs_through_the_coordinator_without_a_model(monkeypatch)
     assert [name for name, _ in sdk.calls] == ["add"]
 
 
+def test_a_lite_write_ignores_the_model_sedimentation_switch(monkeypatch) -> None:
+    sdk = _WritingSdk()
+    coordinator = sdk_write_processor.SdkWriteCoordinator(
+        profiles=_Profiles(identity=None),  # type: ignore[arg-type]
+        secrets=None,  # type: ignore[arg-type]
+        data_dir=None,
+        transport_factory=lambda _profile: None,
+        sedimentation_enabled=lambda: False,
+        memory_mode=lambda: "lite",
+    )
+    monkeypatch.setattr(
+        sdk_write_processor, "SdkClientHandle", lambda profile, **kwargs: _SdkHandle(sdk, "lite")
+    )
+    admitted = 0
+
+    async def admit(_requires_generation: bool) -> None:
+        nonlocal admitted
+        admitted += 1
+
+    receipt = asyncio.run(
+        coordinator.process_sdk_job(
+            (_record("still stored as raw", extracted=False),),
+            request_id="r-off-lite",
+            before_hy_invocation=admit,
+        )
+    )
+    assert receipt.raw_ids == ("raw-1",)
+    assert admitted == 1
+    assert [name for name, _ in sdk.calls] == ["add"]
+
+
 def test_no_raw_is_ever_deleted_in_any_mode() -> None:
     """Owner decision: MemHub keeps every raw; there is no retention window."""
     from one_memory import sdk_memory_runtime
@@ -624,6 +705,38 @@ def test_the_scheduler_runs_each_due_user_once_in_ultra_only(tmp_path, monkeypat
     assert state.user("wife").last_result["trigger"] == "scheduled"
 
 
+def test_scheduled_evolve_obeys_the_shared_lifecycle_gate(tmp_path, monkeypatch) -> None:
+    sdk = _EvolveSdk(continuing=0)
+    state = EvolveStateStore(tmp_path)
+    state.anchor(_at(1, 12))
+    open_gate = [False]
+    service = EvolveService(
+        coordinator=_Coordinator(sdk, monkeypatch),
+        state=state,
+        memory_mode=lambda: "ultra",
+        now=lambda: _at(2, 3, 2),
+    )
+
+    async def users():
+        return ("local",)
+
+    async def scenario():
+        scheduler = EvolveScheduler(
+            service=service,
+            schedule=EvolveSchedule,
+            users_with_memories=users,
+            lifecycle_lock=asyncio.Lock(),
+            lifecycle_open=lambda: open_gate[0],
+            now=lambda: _at(2, 3, 2),
+        )
+        assert await scheduler.tick() == ()
+        assert sdk.calls == []
+        open_gate[0] = True
+        assert await scheduler.tick() == ("local",)
+
+    asyncio.run(scenario())
+
+
 def test_the_graph_backfill_runs_once_per_user(tmp_path, monkeypatch) -> None:
     sdk = _EvolveSdk()
     state = EvolveStateStore(tmp_path)
@@ -643,6 +756,63 @@ def test_the_graph_backfill_runs_once_per_user(tmp_path, monkeypatch) -> None:
     }
 
 
+def test_an_interrupted_graph_backfill_resumes_only_unfinished_users(tmp_path, monkeypatch) -> None:
+    sdk = _EvolveSdk()
+    state = EvolveStateStore(tmp_path)
+    state.set_graph_build(
+        GraphBuildState(
+            state="running",
+            started_at=_at(1, 3),
+            users={
+                "local": GraphBuildUser(state="succeeded", memories_scanned=4, nodes=4),
+                "wife": GraphBuildUser(state="running"),
+            },
+        )
+    )
+    backfill = MemoryGraphBackfill(coordinator=_Coordinator(sdk, monkeypatch), state=state)
+
+    async def scenario():
+        resumed = backfill.recover(["local", "wife"])
+        assert resumed.state == "running"
+        assert resumed.users["local"].state == "succeeded"
+        assert resumed.users["wife"].state == "pending"
+        await backfill.wait()
+
+    asyncio.run(scenario())
+    assert sdk.graph_builds == ["wife"]
+    assert state.graph_build().state == "succeeded"
+
+
+def test_graph_backfill_waits_for_embedding_maintenance_to_finish(tmp_path, monkeypatch) -> None:
+    sdk = _EvolveSdk()
+    state = EvolveStateStore(tmp_path)
+    gate = [False]
+    checked = asyncio.Event()
+
+    def lifecycle_open() -> bool:
+        checked.set()
+        return gate[0]
+
+    backfill = MemoryGraphBackfill(
+        coordinator=_Coordinator(sdk, monkeypatch),
+        state=state,
+        lifecycle_open=lifecycle_open,
+    )
+
+    async def scenario():
+        backfill.start(["local"])
+        await checked.wait()
+        assert sdk.graph_builds == []
+        assert state.graph_build().state == "running"
+        assert state.graph_build().users["local"].state == "pending"
+        gate[0] = True
+        await backfill.wait()
+
+    asyncio.run(scenario())
+    assert sdk.graph_builds == ["local"]
+    assert state.graph_build().state == "succeeded"
+
+
 # --- the HTTP surface -----------------------------------------------------------
 
 
@@ -701,23 +871,38 @@ def test_mode_api_get_put_and_its_effects(tmp_path, monkeypatch) -> None:
     async def scenario(app, sdk, client):
         current = (await client.get("/api/v1/settings/memory-mode")).json()
         assert current["mode"] == current["configured_mode"] == "pro"
+        assert current["explicitly_configured"] is False
         assert current["forced_by_env"] is False
         assert app.state.sdk_write_coordinator.memory_mode() == "pro"
+        assert (
+            await client.put("/api/v1/sedimentation", json={"enabled": False})
+        ).status_code == 200
+        from one_memory.api import _sedimentation_claim_enabled
 
+        app.state.history_import_gate_released = True
+        assert not _sedimentation_claim_enabled(app, "one-memory-manual")
+
+        app.state.config_store.set_sedimentation_enabled(False)
         lite = await client.put("/api/v1/settings/memory-mode", json={"mode": "lite"})
         assert lite.status_code == 200, lite.text
         body = lite.json()
         assert body["mode"] == "lite" and body["previous_mode"] == "pro"
+        assert body["explicitly_configured"] is True
         assert body["effects"] == ["higher_mode_memories_hidden"]
+        resume = getattr(app.state, "sedimentation_resume", None)
+        assert resume is not None
+        await asyncio.wait_for(asyncio.shield(resume), 5)
         assert app.state.sdk_write_coordinator.memory_mode() == "lite"
         assert _sdk_client_handle(app).memory_mode() == "lite"
         # lite claims queued work without a generation model.
-        from one_memory.api import _sedimentation_claim_enabled
-
         assert app.state.model_profile_store.active_identity() is None
-        app.state.history_import_gate_released = True
         assert _sedimentation_claim_enabled(app, "one-memory-manual")
 
+        monkeypatch.setattr(
+            app.state.model_profile_store,
+            "active_identity",
+            lambda: ("active-profile", 1),
+        )
         ultra = await client.put("/api/v1/settings/memory-mode", json={"mode": "ultra"})
         assert ultra.status_code == 200, ultra.text
         assert "existing_memories_added_to_graph" in ultra.json()["effects"]
@@ -741,6 +926,173 @@ def test_mode_api_get_put_and_its_effects(tmp_path, monkeypatch) -> None:
     run_app(tmp_path, monkeypatch, scenario)
 
 
+@pytest.mark.fresh_sdk
+def test_mode_plan_and_put_share_validation_and_effects(tmp_path, monkeypatch) -> None:
+    async def scenario(app, _sdk, client):
+        plan = await client.post(
+            "/api/v1/settings/memory-mode/plan",
+            json={"mode": "lite"},
+        )
+        assert plan.status_code == 200
+        body = plan.json()
+        assert body == {
+            "current": "pro",
+            "target": "lite",
+            "effective_target": "lite",
+            "capabilities": {
+                "content_plane": "raw",
+                "generation_required": False,
+                "graph_enabled": False,
+                "evolve_available": False,
+            },
+            "effects": ["higher_mode_memories_hidden"],
+            "warnings": [],
+            "blockers": [],
+        }
+        changed = await client.put("/api/v1/settings/memory-mode", json={"mode": "lite"})
+        assert changed.status_code == 200
+        assert changed.json()["effects"] == body["effects"]
+
+        missing_model = (
+            await client.post(
+                "/api/v1/settings/memory-mode/plan",
+                json={"mode": "pro"},
+            )
+        ).json()
+        assert missing_model["blockers"] == ["active_model_required"]
+        assert missing_model["effects"] == []
+        refused = await client.put("/api/v1/settings/memory-mode", json={"mode": "pro"})
+        assert refused.status_code == 409
+        assert refused.json()["detail"] == missing_model["blockers"][0]
+
+        monkeypatch.setenv("ONE_MEMORY_GRAPH_STORE", "kuzu")
+        forced = (
+            await client.post(
+                "/api/v1/settings/memory-mode/plan",
+                json={"mode": "lite"},
+            )
+        ).json()
+        assert forced["effective_target"] == "ultra"
+        assert forced["warnings"] == ["forced_by_env", "effective_no_change"]
+
+    run_app(tmp_path, monkeypatch, scenario)
+
+
+@pytest.mark.fresh_sdk
+def test_mode_plan_reports_all_blockers_without_planned_effects(tmp_path, monkeypatch) -> None:
+    async def scenario(app, _sdk, client):
+        changed = await client.put("/api/v1/settings/memory-mode", json={"mode": "lite"})
+        assert changed.status_code == 200
+        switch = app.state.embedding_switch
+        switch._scan_hold = True
+        hold = asyncio.Event()
+        task = asyncio.create_task(hold.wait())
+        app.state.memory_graph_backfill._task = task
+        monkeypatch.setattr("one_memory.api.importlib.util.find_spec", lambda _name: None)
+        try:
+            plan = (
+                await client.post(
+                    "/api/v1/settings/memory-mode/plan",
+                    json={"mode": "ultra"},
+                )
+            ).json()
+            assert plan["blockers"] == [
+                "embedding_maintenance_in_progress",
+                "active_model_required",
+                "memory_lifecycle_busy",
+                "graph_store_unavailable",
+            ]
+            assert plan["effects"] == []
+        finally:
+            switch._scan_hold = False
+            task.cancel()
+            await asyncio.gather(task, return_exceptions=True)
+            app.state.memory_graph_backfill._task = None
+
+    run_app(tmp_path, monkeypatch, scenario)
+
+
+@pytest.mark.fresh_sdk
+def test_lite_startup_readmits_jobs_while_model_sedimentation_is_off(tmp_path, monkeypatch) -> None:
+    store = ConfigStore(tmp_path / "data")
+    store.set_memory_mode("lite")
+    store.set_sedimentation_enabled(False)
+    resumed = asyncio.Event()
+    original = SdkMemoryRuntime.resume_allowed
+
+    async def resume_allowed(runtime):
+        await original(runtime)
+        resumed.set()
+
+    monkeypatch.setattr(SdkMemoryRuntime, "resume_allowed", resume_allowed)
+
+    async def scenario(app, _sdk, _client):
+        await asyncio.wait_for(resumed.wait(), 5)
+        assert app.state.config_store.sedimentation_enabled() is False
+        assert app.state.config_store.memory_mode() == "lite"
+
+    run_app(tmp_path, monkeypatch, scenario)
+
+
+@pytest.mark.fresh_sdk
+def test_embedding_maintenance_blocks_mode_put_and_evolve_but_not_mode_get(
+    tmp_path, monkeypatch
+) -> None:
+    async def scenario(app, _sdk, client):
+        switch = app.state.embedding_switch
+
+        switch._scan_hold = True
+        current = await client.get("/api/v1/settings/memory-mode")
+        assert current.status_code == 200
+        assert current.json()["explicitly_configured"] is False
+        for response in (
+            await client.put("/api/v1/settings/memory-mode", json={"mode": "pro"}),
+            await client.post("/api/v2/evolve", json={}),
+        ):
+            assert response.status_code == 409
+            assert response.json()["detail"] == "embedding_maintenance_in_progress"
+        assert app.state.config_store.memory_mode_explicitly_configured() is False
+
+        switch._scan_hold = False
+        switch._open_cache = True
+        assert (await client.get("/api/v1/settings/memory-mode")).status_code == 200
+        for response in (
+            await client.put("/api/v1/settings/memory-mode", json={"mode": "lite"}),
+            await client.post("/api/v2/evolve", json={}),
+        ):
+            assert response.status_code == 409
+            assert response.json()["detail"] == "embedding_maintenance_in_progress"
+
+        switch._open_cache = False
+        explicitly_pro = await client.put("/api/v1/settings/memory-mode", json={"mode": "pro"})
+        assert explicitly_pro.status_code == 200
+        assert explicitly_pro.json()["explicitly_configured"] is True
+        assert explicitly_pro.json()["effects"] == []
+
+    run_app(tmp_path, monkeypatch, scenario)
+
+
+@pytest.mark.fresh_sdk
+def test_graph_backfill_blocks_mode_change_and_manual_evolve(tmp_path, monkeypatch) -> None:
+    async def scenario(app, _sdk, client):
+        hold = asyncio.Event()
+        task = asyncio.create_task(hold.wait())
+        app.state.memory_graph_backfill._task = task
+        try:
+            for response in (
+                await client.put("/api/v1/settings/memory-mode", json={"mode": "lite"}),
+                await client.post("/api/v2/evolve", json={}),
+            ):
+                assert response.status_code == 409
+                assert response.json()["detail"] == "memory_lifecycle_busy"
+        finally:
+            task.cancel()
+            await asyncio.gather(task, return_exceptions=True)
+            app.state.memory_graph_backfill._task = None
+
+    run_app(tmp_path, monkeypatch, scenario)
+
+
 @pytest.mark.fresh_sdk
 def test_evolve_api_is_ultra_only_async_and_scoped_per_user(tmp_path, monkeypatch) -> None:
     async def scenario(app, sdk, client):
@@ -748,7 +1100,13 @@ def test_evolve_api_is_ultra_only_async_and_scoped_per_user(tmp_path, monkeypatc
         assert refused.status_code == 409
         assert refused.json()["detail"] == "memory_mode_not_ultra"
 
-        await client.put("/api/v1/settings/memory-mode", json={"mode": "ultra"})
+        monkeypatch.setattr(
+            app.state.model_profile_store,
+            "active_identity",
+            lambda: ("active-profile", 1),
+        )
+        changed = await client.put("/api/v1/settings/memory-mode", json={"mode": "ultra"})
+        assert changed.status_code == 200, changed.text
         await app.state.memory_graph_backfill.wait()
         started = await client.post(
             "/api/v2/evolve", json={"user_id": "wife", "agent_id": "all-apps", "max_batches": 2}
@@ -865,3 +1223,87 @@ def test_a_job_written_in_lite_stays_done_and_a_pending_job_takes_the_new_mode(
         await coordinator.close()
 
     run_app(tmp_path, monkeypatch, scenario)
+
+
+@pytest.mark.fresh_sdk
+def test_paused_model_still_writes_a_lite_job_through_the_durable_boundary(
+    tmp_path, monkeypatch
+) -> None:
+    from one_memory.api import _admit_pipeline_invocation
+    from one_memory.memory_server.durable_queue import DurableWriteDrain, execute_job
+
+    seen: list[str] = []
+
+    class Sdk:
+        mode = "lite"
+
+        def add(self, messages, **kwargs):
+            seen.append("add")
+            return {"success": True, "raw_ids": ["raw-lite"]}
+
+        def add_extracted(self, contents, **kwargs):
+            seen.append("add_extracted")
+            raise AssertionError("lite must never call add_extracted")
+
+    monkeypatch.setattr(
+        sdk_write_processor,
+        "SdkClientHandle",
+        lambda profile, **kwargs: _SdkHandle(Sdk(), "lite"),
+    )
+    coordinator = sdk_write_processor.SdkWriteCoordinator(
+        profiles=_Profiles(identity=None),  # type: ignore[arg-type]
+        secrets=None,  # type: ignore[arg-type]
+        data_dir=None,
+        transport_factory=lambda _profile: None,
+        sedimentation_enabled=lambda: False,
+        memory_mode=lambda: "lite",
+    )
+
+    async def never(_job_id):
+        return None
+
+    async def scenario(app, _sdk, client):
+        app.state.memory_write_drain.stop()
+        if app.state.memory_write_drain_task is not None:
+            await app.state.memory_write_drain_task
+            app.state.memory_write_drain_task = None
+        await client.put("/api/v1/sedimentation", json={"enabled": False})
+        await client.put("/api/v1/settings/memory-mode", json={"mode": "lite"})
+        app.state.history_import_gate_released = True
+        written = await client.post(
+            "/api/v2/memory-writes",
+            json={
+                "request_id": "paused-lite-turn",
+                "session_id": "paused-lite-session",
+                "source_id": "one-memory-manual",
+                "messages": [
+                    {"role": "user", "content": "保留原始会话"},
+                    {"role": "assistant", "content": "已保留"},
+                ],
+            },
+        )
+        assert written.status_code == 202
+        queue = app.state.memory_write_queue
+        drain = DurableWriteDrain(queue, execute=never, lease=timedelta(seconds=30))
+        [job_id] = drain.claim(limit=1)
+        await execute_job(
+            job_id,
+            queue=queue,
+            supervisor=coordinator,
+            evidence=None,  # type: ignore[arg-type]
+            admit_hy_invocation=lambda source_id, requires_generation, mark: (
+                _admit_pipeline_invocation(
+                    app,
+                    source_id,
+                    requires_generation,
+                    mark,
+                )
+            ),
+        )
+        current = queue.get("paused-lite-turn")
+        assert current is not None and current.state == "completed"
+        assert current.sdk_raw_ids == ("raw-lite",)
+        assert seen == ["add"]
+        await coordinator.close()
+
+    run_app(tmp_path, monkeypatch, scenario)

memhub/apps/core/tests/test_memory_server_durable_queue.py

@@ -832,7 +832,7 @@ class _Recorder:
     async def process_sdk_job(self, records, **_kwargs):
         self.seen.append(tuple(record.evidence_id for record in records))
         if self.invoke_hy:
-            await _kwargs["before_hy_invocation"]()
+            await _kwargs["before_hy_invocation"](True)
         if self.error is not None:
             raise self.error
         return type("Receipt", (), {"raw_ids": (), "memory_ids": ()})()
@@ -844,10 +844,10 @@ class _TwoInvocationRecorder:
         self.invocations = 0
 
     async def process_sdk_job(self, _records, **kwargs):
-        await kwargs["before_hy_invocation"]()
+        await kwargs["before_hy_invocation"](True)
         self.invocations += 1
         self.pause_after_first()
-        await kwargs["before_hy_invocation"]()
+        await kwargs["before_hy_invocation"](True)
         self.invocations += 1
         return type("Receipt", (), {"raw_ids": (), "memory_ids": ()})()
 
@@ -916,7 +916,7 @@ def test_execute_job_persists_sdk_ids_returned_after_the_single_add(tmp_path) ->
         @classmethod
         async def process_sdk_job(cls, _records, **kwargs):
             cls.calls += 1
-            await kwargs["before_hy_invocation"]()
+            await kwargs["before_hy_invocation"](True)
             return type(
                 "Result",
                 (),
@@ -1045,7 +1045,7 @@ def test_sdk_write_processor_calls_add_once_with_public_scope_and_receipt() -> N
     )
 
     async def run() -> SdkWriteReceipt:
-        async def before() -> None:
+        async def before(_requires_generation: bool) -> None:
             client.events.append("before")
 
         return await processor.process_sdk_job(
@@ -1105,7 +1105,7 @@ def test_sdk_write_processor_uses_add_extracted_for_memory_content_and_additions
     processor = SdkWriteProcessor(_SdkPublicHandle(client))  # type: ignore[arg-type]
 
     async def run() -> SdkWriteReceipt:
-        async def before() -> None:
+        async def before(_requires_generation: bool) -> None:
             client.events.append("before")
 
         return await processor.process_sdk_job(
@@ -1260,7 +1260,7 @@ def test_a_profile_change_does_not_close_the_client_of_a_write_in_flight(monkeyp
 
     async def process(self, records, *, request_id, before_hy_invocation):
         client = await self._client_handle.client()
-        await before_hy_invocation()
+        await before_hy_invocation(getattr(client, "mode", None) != "lite")
         seen.append((client.profile_id, client.closed))
         if client.profile_id == "profile-a":
             await writing.wait()
@@ -1270,7 +1270,7 @@ def test_a_profile_change_does_not_close_the_client_of_a_write_in_flight(monkeyp
 
     monkeypatch.setattr(sdk_write_processor.SdkWriteProcessor, "process_sdk_job", process)
 
-    async def noop():
+    async def noop(_requires_generation: bool):
         return None
 
     async def scenario():
@@ -1433,25 +1433,6 @@ def test_a_claimed_row_with_no_readable_payload_is_settled_not_left_running(tmp_
     assert _rows(path)[0]["lease_owner"] is None
 
 
-def test_an_unknown_outcome_is_recorded_as_unknown_not_retried(tmp_path) -> None:
-    path = tmp_path / "one-memory.sqlite3"
-    queue = DurableWriteQueue(path)
-    record = queue.submit(_request())
-    supervisor = _Recorder(error=RuntimeError("model_content_outcome_unknown"))
-    _claim_through_drain(queue, record.job_id)
-
-    asyncio.run(
-        execute_job(
-            record.job_id,
-            queue=queue,
-            supervisor=supervisor,
-            evidence=_EvidenceStore({"e1"}),
-        )
-    )
-
-    assert _state(path, record.job_id) == "unknown"
-
-
 def test_unpermitted_evidence_parks_and_is_readmitted_after_confirmation(tmp_path) -> None:
     """A note claimed before its confirmation must not become terminal failed."""
     path = tmp_path / "one-memory.sqlite3"
@@ -1478,34 +1459,6 @@ def test_unpermitted_evidence_parks_and_is_readmitted_after_confirmation(tmp_pat
     assert replay.state == PENDING
 
 
-def test_a_permission_error_after_hy_invocation_stays_unknown(tmp_path) -> None:
-    """An error code cannot erase the durable possibly-sent boundary."""
-    path = tmp_path / "one-memory.sqlite3"
-    queue = DurableWriteQueue(path)
-    record = queue.submit(_request())
-    _claim_through_drain(queue, record.job_id)
-
-    asyncio.run(
-        execute_job(
-            record.job_id,
-            queue=queue,
-            supervisor=_Recorder(
-                error=RuntimeError("model_content_evidence_changed"),
-                invoke_hy=True,
-            ),
-            evidence=_EvidenceStore({"e1"}),
-        )
-    )
-
-    assert queue.get(record.request_id).state == UNKNOWN
-    with sqlite3.connect(path) as connection:
-        assert connection.execute(
-            "SELECT hy_invoked,last_error FROM memory_write_jobs WHERE job_id=?",
-            (record.job_id,),
-        ).fetchone() == (1, "model_content_evidence_changed")
-    assert queue.reclaim_expired() == 0
-
-
 def test_replayed_live_evidence_readmits_a_pre_send_identity_failure(tmp_path) -> None:
     path = tmp_path / "one-memory.sqlite3"
     queue = DurableWriteQueue(path)
@@ -1623,90 +1576,6 @@ def test_startup_never_repairs_a_possibly_sent_identity_failure(tmp_path) -> Non
     assert queue.get(job.request_id).state == UNKNOWN
 
 
-def test_reconciled_absent_timeout_is_requeued_once_without_resetting_attempts(
-    tmp_path,
-) -> None:
-    path = tmp_path / "one-memory.sqlite3"
-    queue = DurableWriteQueue(path)
-    record = queue.submit(_request())
-    with sqlite3.connect(path) as connection, connection:
-        connection.execute(
-            "UPDATE memory_write_jobs SET state='unknown', attempts=1, "
-            "hy_invoked=1, last_error='hy_memory_timeout', updated_at=? WHERE job_id=?",
-            ("2026-01-01T00:00:00+00:00", record.job_id),
-        )
-
-    assert (
-        queue.retry_timed_out_unknown_after_reconcile(
-            older_than=datetime(2026, 1, 1, 0, 5, tzinfo=UTC)
-        )
-        == 1
-    )
-    with sqlite3.connect(path) as connection:
-        state, attempts, invoked, error = connection.execute(
-            "SELECT state, attempts, hy_invoked, last_error FROM memory_write_jobs WHERE job_id=?",
-            (record.job_id,),
-        ).fetchone()
-    assert (state, attempts, invoked, error) == (
-        "pending",
-        1,
-        0,
-        "model_content_reconciled_absent_retry",
-    )
-
-
-def test_unresolved_unknown_is_automatically_retried_only_once(tmp_path) -> None:
-    path = tmp_path / "one-memory.sqlite3"
-    queue = DurableWriteQueue(path)
-    record = queue.submit(_request())
-    with sqlite3.connect(path) as connection, connection:
-        connection.execute(
-            "UPDATE memory_write_jobs SET state='unknown',attempts=1,hy_invoked=1,"
-            "last_error='model_content_outcome_unknown',updated_at=? WHERE job_id=?",
-            ("2026-01-01T00:00:00+00:00", record.job_id),
-        )
-
-    cutoff = datetime(2026, 1, 1, 0, 5, tzinfo=UTC)
-    assert queue.retry_first_unknown_after_reconcile(older_than=cutoff) == 1
-    first_retry = queue.get(record.request_id)
-    assert first_retry.state == PENDING
-    with sqlite3.connect(path) as connection:
-        assert (
-            connection.execute(
-                "SELECT attempts FROM memory_write_jobs WHERE job_id=?",
-                (record.job_id,),
-            ).fetchone()[0]
-            == 1
-        )
-
-    drain = DurableWriteDrain(queue, execute=_never_execute, owner="retry-owner")
-    assert drain.claim(limit=1) == (record.job_id,)
-    assert queue.mark_invoked(record.job_id, owner="retry-owner")
-    queue.settle(
-        record.job_id,
-        state=UNKNOWN,
-        owner="retry-owner",
-        error_code="model_content_outcome_unknown",
-        hy_invoked=True,
-    )
-
-    with sqlite3.connect(path) as connection:
-        assert (
-            connection.execute(
-                "SELECT attempts FROM memory_write_jobs WHERE job_id=?",
-                (record.job_id,),
-            ).fetchone()[0]
-            == 2
-        )
-    assert (
-        queue.retry_first_unknown_after_reconcile(
-            older_than=datetime.now(UTC) + timedelta(minutes=1)
-        )
-        == 0
-    )
-    assert queue.get(record.request_id).state == UNKNOWN
-
-
 def test_drain_runs_unknown_reconciliation_during_busy_safe_maintenance(tmp_path) -> None:
     queue = DurableWriteQueue(tmp_path / "one-memory.sqlite3")
     calls = 0
@@ -1759,26 +1628,6 @@ def test_a_reclaimed_uninvoked_job_with_attempts_left_is_retryable(tmp_path) ->
     assert _rows(path)[0]["attempts"] == 0
 
 
-def test_post_invocation_transport_failure_stays_unknown_not_pending(tmp_path) -> None:
-    """Once the bridge may have been opened, no error is safe to replay."""
-    path = tmp_path / "one-memory.sqlite3"
-    queue = DurableWriteQueue(path)
-    record = queue.submit(_request())
-    _claim_through_drain(queue, record.job_id)
-
-    asyncio.run(
-        execute_job(
-            record.job_id,
-            queue=queue,
-            supervisor=_Recorder(error=RuntimeError("hy_memory_timeout")),
-            evidence=_EvidenceStore({"e1"}),
-        )
-    )
-
-    assert _state(path, record.job_id) == UNKNOWN
-    assert _rows(path)[0]["hy_invoked"] == 1
-
-
 @pytest.mark.parametrize(
     "code,expected",
     [
@@ -1879,7 +1728,7 @@ def test_a_failed_job_logs_where_it_failed_but_never_the_message(tmp_path, caplo
 
     class _Failing:
         async def process_sdk_job(self, _records, **kwargs):
-            await kwargs["before_hy_invocation"]()
+            await kwargs["before_hy_invocation"](True)
             try:
                 closed_store(type("Client", (), {"private_store_name": None})())
             except AttributeError as error:
@@ -1900,7 +1749,9 @@ def test_a_failed_job_logs_where_it_failed_but_never_the_message(tmp_path, caplo
         for message in caplog.records
         if "durable_write_job_failed" in message.getMessage()
     ]
-    assert f"job_id={record.job_id} error_code=RuntimeError chain=RuntimeError@" in line
+    assert (
+        f"job_id={record.job_id} error_code=RuntimeError state=pending chain=RuntimeError@" in line
+    )
     assert ";AttributeError@" in line
     assert "test_memory_server_durable_queue.py:" in line and ":closed_store" in line
     assert "secret diary" not in line
@@ -2620,57 +2471,6 @@ def test_a_wedged_job_hits_the_work_ceiling_and_settles_unknown(tmp_path) -> Non
     assert (state, owner, expiry) == ("unknown", None, None)
 
 
-def test_user_confirmed_unknown_retry_requeues_job_and_linked_tasks(tmp_path) -> None:
-    path = tmp_path / "one-memory.sqlite3"
-    queue = DurableWriteQueue(path)
-    record = queue.submit(_request(evidence=("e1",)))
-    with sqlite3.connect(path) as connection, connection:
-        connection.execute(
-            "UPDATE memory_write_jobs SET state='unknown', attempts=2, hy_invoked=1, "
-            "last_error='hy_memory_timeout' WHERE job_id=?",
-            (record.job_id,),
-        )
-        connection.executescript(
-            """
-            CREATE TABLE memory_tasks (
-                task_id TEXT PRIMARY KEY,
-                status TEXT NOT NULL,
-                runner_token TEXT,
-                attempts INTEGER NOT NULL,
-                last_error_code TEXT,
-                updated_at TEXT NOT NULL
-            );
-            CREATE TABLE memory_task_inputs (
-                task_id TEXT PRIMARY KEY,
-                refs_json TEXT NOT NULL
-            );
-            """
-        )
-        connection.execute(
-            "INSERT INTO memory_tasks VALUES (?,?,?,?,?,?)",
-            ("task-1", "unknown", None, 2, "model_content_outcome_unknown", "old"),
-        )
-        connection.execute(
-            "INSERT INTO memory_task_inputs VALUES (?,?)",
-            ("task-1", '[{"evidence_id":"e1"}]'),
-        )
-
-    assert queue.retry_unknown_confirmed(record.job_id) == 1
-    retried = queue.get(record.request_id)
-    assert retried is not None
-    assert retried.state == PENDING
-    with sqlite3.connect(path) as connection:
-        assert connection.execute(
-            "SELECT attempts, hy_invoked FROM memory_write_jobs WHERE job_id=?",
-            (record.job_id,),
-        ).fetchone() == (0, 0)
-        assert connection.execute(
-            "SELECT status, attempts, last_error_code FROM memory_tasks WHERE task_id='task-1'"
-        ).fetchone() == ("pending", 0, "model_content_manual_retry_requested")
-
-    assert queue.retry_unknown_confirmed(record.job_id) == 0
-
-
 def test_restart_redrains_a_job_claimed_by_a_worker_that_died(tmp_path) -> None:
     """End-to-end restart recovery: a claimed-but-not-run job runs once.
 
@@ -2922,30 +2722,6 @@ def test_forever_drain_admits_a_new_source_while_an_earlier_source_is_running(tm
     assert queue.get("workbuddy-1").state == COMPLETED
 
 
-def test_sqlite_drain_preserves_unknown_after_execute_job(tmp_path) -> None:
-    """A drain failure after invocation must remain unknown, not look retryable."""
-    path = tmp_path / "one-memory.sqlite3"
-    queue = DurableWriteQueue(path)
-    queue.submit(_request(evidence=("e1",)))
-
-    async def execute(job_id: str) -> None:
-        await execute_job(
-            job_id,
-            queue=queue,
-            supervisor=_Recorder(error=RuntimeError("model_content_outcome_unknown")),
-            evidence=_EvidenceStore({"e1"}),
-        )
-
-    async def scenario() -> None:
-        drain = DurableWriteDrain(queue, execute=execute)
-        assert await drain.run_one() == 1
-
-    asyncio.run(scenario())
-    assert queue.get("idem-1").state == "unknown"
-    assert queue.reclaim_expired() == 0
-    assert queue.get("idem-1").state == "unknown"
-
-
 def test_sqlite_drain_keeps_running_after_an_executor_raises(tmp_path) -> None:
     """One executor exception must not kill the drain or strand other rows.
 
@@ -4222,27 +3998,6 @@ def test_set_state_rejects_an_unvalidated_state(tmp_path) -> None:
     assert registry.get(record.request_id).state == "accepted"
 
 
-def test_set_state_cannot_resolve_unknown_without_an_inquiry(tmp_path) -> None:
-    """The HTTP-facing setter must not bypass the inquiry-only exit.
-
-    `DurableWriteQueue.settle` deliberately treats `unknown` as sticky; a
-    direct `set_state("completed"/"failed")` would otherwise turn a
-    possibly-delivered write into a terminal claim without asking HY. The
-    durable registry is the shared caller surface, so it must preserve that
-    boundary even though today only tests call it.
-    """
-    from one_memory.memory_server.durable_queue import DurableWriteRegistry
-
-    path = tmp_path / "one-memory.sqlite3"
-    registry = DurableWriteRegistry(path)
-    durable = registry.queue.submit(_request())
-    registry.queue.settle(durable.job_id, state=UNKNOWN, hy_invoked=True)
-
-    assert registry.set_state(durable.request_id, "completed") is None
-    assert registry.set_state(durable.request_id, "failed") is None
-    assert registry.get(durable.request_id).state == UNKNOWN
-
-
 @pytest.mark.parametrize("state", (WAITING_FOR_PERMISSION, WAITING_FOR_MODEL))
 def test_set_state_accepts_the_route_parked_states(tmp_path, state: str) -> None:
     """The durable setter must accept every non-terminal route state.
@@ -5003,7 +4758,7 @@ def test_sedimentation_pause_releases_claim_without_spending_an_attempt(tmp_path
     drain = DurableWriteDrain(queue, execute=_never_execute, owner="pause-owner")
     assert drain.claim(limit=1) == (record.job_id,)
 
-    async def refuse_before_hy(_source_id, _mark_invoked):
+    async def refuse_before_hy(_source_id, _requires_generation, _mark_invoked):
         raise RuntimeError("model_sedimentation_disabled")
 
     asyncio.run(
@@ -5435,83 +5190,6 @@ def test_readmit_paths_never_requeue_a_possibly_sent_row(tmp_path) -> None:
     assert DurableWriteDrain(queue, execute=_never_execute).claim(limit=5) == ()
 
 
-def test_a_refused_source_context_is_nonblocking_unknown(
-    tmp_path,
-) -> None:
-    """An ambiguous call-boundary failure is retained but never blocks FIFO."""
-    path = tmp_path / "one-memory.sqlite3"
-    queue = DurableWriteQueue(path)
-    record = queue.submit(_request(key="refused-scope", source="opencode"))
-    claimer = DurableWriteDrain(queue, execute=_never_execute, owner="refused-owner")
-    assert claimer.claim(limit=1) == (record.job_id,)
-
-    asyncio.run(
-        execute_job(
-            record.job_id,
-            queue=queue,
-            supervisor=_Recorder(
-                error=RuntimeError("hy_memory_write_verification_context_scope"),
-                invoke_hy=True,
-            ),
-            evidence=_EvidenceStore({"e1"}),
-            owner="refused-owner",
-        )
-    )
-
-    with sqlite3.connect(path.as_uri() + "?mode=ro", uri=True) as db:
-        state, invoked, last_error = db.execute(
-            "SELECT state, hy_invoked, last_error FROM memory_write_jobs WHERE job_id=?",
-            (record.job_id,),
-        ).fetchone()
-
-    assert state == UNKNOWN
-    assert invoked == 1
-    assert last_error == "hy_memory_write_verification_context_scope"
-    assert DurableWriteDrain(queue, execute=_never_execute).claim(limit=1) == ()
-
-
-def test_a_failure_after_the_call_still_parks_as_unknown(tmp_path) -> None:
-    """The fix must not widen: a post-call refusal is still possibly-sent."""
-    path = tmp_path / "one-memory.sqlite3"
-    queue = DurableWriteQueue(path)
-    record = queue.submit(_request(key="after-call", source="opencode"))
-    claimer = DurableWriteDrain(queue, execute=_never_execute, owner="after-call-owner")
-    assert claimer.claim(limit=1) == (record.job_id,)
-    recorder = _Recorder(
-        error=RuntimeError("hy_memory_write_verification_authority_invalid"),
-        invoke_hy=True,
-    )
-
-    asyncio.run(
-        execute_job(
-            record.job_id,
-            queue=queue,
-            supervisor=recorder,
-            evidence=_EvidenceStore({"e1"}),
-            owner="after-call-owner",
-        )
-    )
-
-    with sqlite3.connect(path.as_uri() + "?mode=ro", uri=True) as db:
-        state, invoked = db.execute(
-            "SELECT state, hy_invoked FROM memory_write_jobs WHERE job_id=?",
-            (record.job_id,),
-        ).fetchone()
-
-    assert state == UNKNOWN
-    assert invoked == 1
-    assert len(recorder.seen) == 1
-    assert (
-        queue.retry_first_unknown_after_reconcile(
-            older_than=datetime.now(UTC) + timedelta(minutes=1)
-        )
-        == 0
-    )
-    assert queue.retry_unknown_confirmed(record.job_id) == 0
-    assert DurableWriteDrain(queue, execute=_never_execute).claim(limit=1) == ()
-    assert len(recorder.seen) == 1
-
-
 def test_event_time_not_enqueue_order_drives_the_window(
     tmp_path,
 ) -> None:
@@ -5674,3 +5352,93 @@ def test_hand_added_memories_still_run_one_at_a_time_in_order(tmp_path) -> None:
     assert drain.claim(limit=5) == ()
     assert queue.get("note-2").state == PENDING
     assert second.job_id
+
+
+def test_a_job_the_execute_gate_releases_is_not_reclaimed_while_it_still_refuses(
+    tmp_path,
+) -> None:
+    """The claim gate and the execute gate can disagree for good (#245).
+
+    The claim asks about the lane's user, the execute gate about the user of
+    the job's Evidence. An id-only pre-upgrade payload sits in the `local`
+    lane even when its Evidence belongs to someone else: while that user
+    evolves, the claim admits the job and the execute gate hands it back.
+    Released with no hold, the very next tick claimed it again, in a loop.
+    """
+    path = tmp_path / "one-memory.sqlite3"
+    queue = DurableWriteQueue(path)
+    record = queue.submit(_request(key="evolving-user", source="cursor"))
+    drain = DurableWriteDrain(queue, execute=_never_execute, owner="gate-owner")
+    assert drain.claim(limit=1) == (record.job_id,)
+
+    asyncio.run(
+        execute_job(
+            record.job_id,
+            queue=queue,
+            supervisor=_Recorder(error=RuntimeError("memory_evolve_in_progress")),
+            evidence=_EvidenceStore({"e1"}),
+            owner="gate-owner",
+        )
+    )
+
+    assert queue.get(record.request_id).state == PENDING
+    now = datetime.now(UTC)
+    assert drain.claim(limit=1, now=now) == ()
+    assert drain.claim(limit=1, now=now + timedelta(seconds=4)) == ()
+    assert drain.claim(limit=1, now=now + timedelta(seconds=6)) == (record.job_id,)
+    with sqlite3.connect(path) as connection:
+        assert connection.execute(
+            "SELECT attempts,hy_invoked FROM memory_write_jobs WHERE job_id=?",
+            (record.job_id,),
+        ).fetchone() == (1, 0)
+
+
+def _suspension_runtime(queue: DurableWriteQueue, enabled: set[str]):
+    from one_memory.sdk_memory_runtime import SdkMemoryRuntime
+
+    return SdkMemoryRuntime(
+        coordinator=SimpleNamespace(),
+        read_handle=SimpleNamespace(),  # type: ignore[arg-type]
+        write_queue=queue,
+        extraction_settings=SimpleNamespace(),  # type: ignore[arg-type]
+        data_dir=queue.database_path.parent,
+        source_active=lambda source_key: source_key in enabled,
+    )
+
+
+def test_a_disabled_source_suspends_its_jobs_and_enabling_it_resumes_them(tmp_path) -> None:
+    """A source the user turned off keeps its jobs, out of the pending count (#245)."""
+    path = tmp_path / "one-memory.sqlite3"
+    queue = DurableWriteQueue(path)
+    recent = datetime.now(UTC)
+    for index in range(3):
+        queue.submit(_request(key=f"cursor-{index}", source="cursor", event_at=recent))
+    codex = queue.submit(_request(key="codex-0", source="codex", event_at=recent))
+    enabled = {"cursor", "codex"}
+    runtime = _suspension_runtime(queue, enabled)
+    drain = DurableWriteDrain(
+        queue,
+        execute=_never_execute,
+        owner="suspend-owner",
+        source_writes_permitted=lambda source_key: source_key in enabled,
+    )
+
+    assert runtime.status_counts() == {PENDING: 4}
+    assert runtime.queue_depths().fresh == 4
+
+    enabled.discard("cursor")
+
+    assert runtime.status_counts() == {PENDING: 1, "suspended": 3}
+    assert runtime.queue_depths().fresh == 1
+    assert drain.claim(limit=10) == (codex.job_id,)
+    queue.settle(codex.job_id, state=COMPLETED, hy_invoked=True, owner="suspend-owner")
+    assert drain.claim(limit=10) == ()
+    assert runtime.status_counts() == {COMPLETED: 1, "suspended": 3}
+    # Nothing was cancelled, moved or deleted: the rows are as they were.
+    assert [row["state"] for row in _rows(path) if row["source_key"] == "cursor"] == [PENDING] * 3
+
+    enabled.add("cursor")
+
+    assert runtime.status_counts() == {PENDING: 3, COMPLETED: 1}
+    assert runtime.queue_depths().fresh == 3
+    assert len(drain.claim(limit=10)) == 1

memhub/apps/core/tests/test_memory_server_unified_entry.py

@@ -259,7 +259,7 @@ def test_old_branch_job_executes_its_frozen_revision_after_harness_rewind(tmp_pa
         ):
             assert request_id == old_job.request_id
             captured.extend(records)
-            await before_hy_invocation()
+            await before_hy_invocation(True)
             return SimpleNamespace(raw_ids=(), memory_ids=())
 
     asyncio.run(

memhub/apps/core/tests/test_memory_tasks.py

@@ -1181,7 +1181,7 @@ def test_authority_invalid_task_is_never_reinvoked(tmp_path) -> None:
     assert retained.last_error_code == "hy_memory_write_verification_authority_invalid"
 
 
-def test_linked_unknown_is_retried_only_by_the_durable_job(tmp_path) -> None:
+def test_linked_unknown_is_rerun_only_by_the_durable_job(tmp_path) -> None:
     from one_memory.memory_server.contracts import BatchIdentity, WriteRequest
     from one_memory.memory_server.durable_queue import DurableWriteQueue
 
@@ -1241,8 +1241,8 @@ def test_linked_unknown_is_retried_only_by_the_durable_job(tmp_path) -> None:
     cutoff = datetime(2026, 1, 1, 0, 5, tzinfo=UTC)
     assert store.retry_first_unknown_after_reconcile(older_than=cutoff) == 0
     assert store.require(task.task_id).status is MemoryTaskStatus.UNKNOWN
-    assert queue.retry_first_unknown_after_reconcile(older_than=cutoff) == 1
-    assert store.require(task.task_id).status is MemoryTaskStatus.PENDING
+    # The durable job is the only execution entry: it re-runs itself.
+    assert queue.recover_unknown() == 1
     assert queue.get(job.request_id).state == "pending"
     assert (
         store.active_window(

memhub/apps/core/tests/test_model_backoff.py

@@ -0,0 +1,875 @@
+"""A broken model configuration must not turn a backlog into a request storm (#245)."""
+
+from __future__ import annotations
+
+import asyncio
+import sqlite3
+from datetime import UTC, datetime, timedelta
+from types import SimpleNamespace
+
+import httpx
+import pytest
+from httpx import ASGITransport, AsyncClient
+from pydantic import SecretStr
+
+from one_memory.api import create_app
+from one_memory.config import Settings
+from one_memory.imports.models import (
+    EvidenceInput,
+    EvidenceOrigin,
+    OriginMetadata,
+    WrittenBy,
+    materialize_write_input,
+)
+from one_memory.memory_server.contracts import BatchIdentity, WriteRequest
+from one_memory.memory_server.durable_queue import (
+    FAILED,
+    PENDING,
+    DurableWriteDrain,
+    DurableWriteQueue,
+    execute_job,
+)
+from one_memory.model_backoff import (
+    BACKOFF_CAP_SECONDS,
+    BackedOffModelTransport,
+    ModelBackoff,
+    ModelBackoffRefusal,
+    backoff_seconds,
+)
+from one_memory.sdk_write_processor import SdkWriteProcessor, sdk_write_failure_code
+from one_memory.secrets import InMemorySecretStore
+
+CHAT = "https://models.example.com/v1/chat/completions"
+EMBEDDINGS = "https://models.example.com/v1/embeddings"
+
+
+class _Clock:
+    def __init__(self) -> None:
+        self.now = 0.0
+
+    def __call__(self) -> float:
+        return self.now
+
+
+def _request(index: int) -> WriteRequest:
+    session = f"sess-{index}"
+    return WriteRequest(
+        internal_session_id=session,
+        batch_identity=BatchIdentity(internal_session_id=session, first_round=1, last_round=5),
+        evidence_ids=[f"e-{index}"],
+        idempotency_key=f"idem-{index}",
+        # Twenty sources, so the drain could claim ten jobs at once.
+        source_id=f"source-{index % 20}",
+    )
+
+
+async def _never_execute(job_id: str) -> None:
+    raise AssertionError(f"the simulation settles {job_id} itself")
+
+
+def _send(transport: BackedOffModelTransport, url: str = CHAT) -> int | None:
+    try:
+        response = asyncio.run(transport.handle_async_request(httpx.Request("POST", url)))
+    except ModelBackoffRefusal:
+        return None
+    return response.status_code
+
+
+def test_the_pause_doubles_from_five_seconds_and_stops_at_three_minutes() -> None:
+    assert [backoff_seconds(level) for level in range(1, 9)] == [
+        5.0,
+        10.0,
+        20.0,
+        40.0,
+        80.0,
+        160.0,
+        180.0,
+        180.0,
+    ]
+    assert backoff_seconds(1000) == BACKOFF_CAP_SECONDS == 180.0
+
+
+def test_an_always_failing_provider_sees_a_bounded_number_of_calls(tmp_path) -> None:
+    """200 pending jobs against a provider that refuses every one.
+
+    Before the pause the drain claimed the next job the moment the last one
+    failed: hundreds of requests a minute. Now the calls follow the schedule.
+    """
+    clock = _Clock()
+    backoff = ModelBackoff(clock=clock)
+    calls: list[float] = []
+
+    def provider(_request: httpx.Request) -> httpx.Response:
+        calls.append(clock.now)
+        return httpx.Response(401)
+
+    transport = BackedOffModelTransport(
+        backoff, profile_id="p:1", inner=httpx.MockTransport(provider)
+    )
+    queue = DurableWriteQueue(tmp_path / "one-memory.sqlite3")
+    for index in range(200):
+        queue.submit(_request(index))
+    drain = DurableWriteDrain(
+        queue,
+        execute=_never_execute,
+        owner="sim",
+        model_claim_allowance=backoff.allowance,
+    )
+
+    claimed = 0
+    for tick in range(6001):
+        # Ten minutes in tenths of a second, without float drift.
+        clock.now = tick / 10
+        for job_id in drain.claim(limit=10):
+            claimed += 1
+            _send(transport)
+            queue.settle(job_id, state=FAILED, owner="sim", error_code="model_auth_failed")
+
+    # The first claim was taken before anything had failed: two of its
+    # requests reached the provider and the rest were refused locally. After
+    # that one probe per pause: 5, 10, 20, 40, 80, 160, then 180 seconds.
+    assert calls[:2] == [0.0, 0.0]
+    probes = calls[2:]
+    assert probes == pytest.approx([5.0, 15.0, 35.0, 75.0, 155.0, 315.0, 495.0], abs=0.11)
+    gaps = [later - earlier for earlier, later in zip(probes, probes[1:], strict=False)]
+    assert max(gaps) <= BACKOFF_CAP_SECONDS + 0.11
+    assert len(calls) == 9
+    assert claimed == 17
+    with sqlite3.connect(tmp_path / "one-memory.sqlite3") as database:
+        (pending,) = database.execute(
+            "SELECT COUNT(*) FROM memory_write_jobs WHERE state=?", (PENDING,)
+        ).fetchone()
+    assert pending == 200 - claimed
+
+
+def test_a_success_ends_the_pause_at_once() -> None:
+    clock = _Clock()
+    backoff = ModelBackoff(clock=clock)
+    replies = [httpx.Response(503), httpx.Response(503), httpx.Response(200)]
+    transport = BackedOffModelTransport(
+        backoff, profile_id="p:1", inner=httpx.MockTransport(lambda _r: replies.pop(0))
+    )
+
+    assert _send(transport) == 503
+    clock.now = 5.0
+    assert backoff.allowance() == 1
+    assert _send(transport) == 503
+    assert backoff.allowance() == 0
+    assert backoff.state().last_error == "model_server_error"
+
+    clock.now = 15.0
+    assert backoff.allowance() == 1
+    assert _send(transport) == 200
+    assert backoff.allowance() is None
+    assert backoff.state().until is None
+    assert backoff.state().failures == 0
+
+
+def test_a_working_embedding_endpoint_does_not_clear_a_broken_chat_model() -> None:
+    clock = _Clock()
+    backoff = ModelBackoff(clock=clock)
+
+    def provider(request: httpx.Request) -> httpx.Response:
+        return httpx.Response(200 if request.url.path.endswith("/embeddings") else 404)
+
+    transport = BackedOffModelTransport(
+        backoff, profile_id="p:1", inner=httpx.MockTransport(provider)
+    )
+    assert _send(transport) == 404
+    assert _send(transport) == 404
+    # Recall's embeddings still go out while the chat model is refused.
+    assert _send(transport, EMBEDDINGS) == 200
+    assert _send(transport) is None
+    assert backoff.state().last_error == "model_not_found"
+    assert backoff.paused()
+
+
+def test_claim_allowance_can_pace_embedding_without_pausing_lite_for_chat() -> None:
+    backoff = ModelBackoff(clock=_Clock())
+    backoff.record_failure("model_not_found", "p:1", "chat")
+    assert backoff.allowance(kind="embedding") is None
+    assert backoff.allowance(kind="chat") == 0
+
+    backoff.reset()
+    backoff.record_failure("embedding_service_failed", "p:1", "embedding")
+    assert backoff.allowance(kind="embedding") == 0
+
+
+def test_an_unreachable_provider_is_paused_like_a_refusing_one() -> None:
+    clock = _Clock()
+    backoff = ModelBackoff(clock=clock)
+
+    def provider(request: httpx.Request) -> httpx.Response:
+        raise httpx.ConnectError("name resolution failed", request=request)
+
+    transport = BackedOffModelTransport(
+        backoff, profile_id="p:1", inner=httpx.MockTransport(provider)
+    )
+    with pytest.raises(httpx.ConnectError):
+        _send(transport)
+    assert backoff.state().last_error == "model_unreachable"
+    assert backoff.allowance() == 0
+
+
+def test_a_request_problem_is_left_to_its_job() -> None:
+    backoff = ModelBackoff(clock=_Clock())
+    transport = BackedOffModelTransport(
+        backoff, profile_id="p:1", inner=httpx.MockTransport(lambda _r: httpx.Response(400))
+    )
+    assert _send(transport) == 400
+    assert backoff.allowance() is None
+
+
+def test_a_configuration_change_ends_the_pause() -> None:
+    clock = _Clock()
+    backoff = ModelBackoff(clock=clock)
+    for _ in range(6):
+        clock.now += 200.0
+        backoff.record_failure("model_auth_failed", "p:1", "chat")
+    assert backoff.state().until is not None
+
+    backoff.reset()
+
+    assert backoff.allowance() is None
+    assert backoff.state().until is None
+    # A new revision of the profile is a new configuration as well.
+    backoff.record_failure("model_auth_failed", "p:1", "chat")
+    backoff.record_failure("model_auth_failed", "p:2", "chat")
+    assert backoff.state().failures == 1
+
+
+def test_a_probe_that_never_reports_does_not_hold_the_queue_forever() -> None:
+    clock = _Clock()
+    backoff = ModelBackoff(clock=clock)
+    backoff.record_failure("model_timeout", "p:1", "chat")
+    clock.now = 5.0
+    assert backoff.allowance() == 1
+    assert backoff.allowance() == 0
+    clock.now = 35.0
+    assert backoff.allowance() == 1
+
+
+def test_memory_processing_shows_the_pause_and_a_profile_save_ends_it(tmp_path) -> None:
+    async def scenario() -> None:
+        app = create_app(
+            Settings(
+                data_dir=tmp_path / "data",
+                source_home=tmp_path,
+                api_token=SecretStr("local-token"),
+            ),
+            secret_store=InMemorySecretStore(),
+        )
+        headers = {"Authorization": "Bearer local-token", "Origin": "http://127.0.0.1:5173"}
+        async with (
+            app.router.lifespan_context(app),
+            AsyncClient(
+                transport=ASGITransport(app=app), base_url="http://test", headers=headers
+            ) as client,
+        ):
+            created = await client.post(
+                "/api/v1/model-profiles",
+                json={
+                    "name": "Provider",
+                    "provider_kind": "openai_compatible",
+                    "base_url": "https://models.example.com/v1",
+                    "model": "memory-model",
+                    "embedding_model": "embedding-model",
+                    "embedding_base_url": "https://models.example.com/v1",
+                    "api_key": "api-route-secret",
+                },
+            )
+            assert created.status_code == 200
+            backoff: ModelBackoff = app.state.model_backoff
+            backoff.record_failure("model_auth_failed", "p:1", "chat")
+
+            paused = (await client.get("/api/v1/memory-processing")).json()
+            assert paused["llm_backoff_error"] == "model_auth_failed"
+            until = datetime.fromisoformat(paused["llm_backoff_until"])
+            assert until > datetime.now(UTC)
+            assert paused["suspended"] == 0
+
+            saved = await client.patch(
+                f"/api/v1/model-profiles/{created.json()['profile_id']}",
+                json={"expected_revision": created.json()["revision"], "model": "other-model"},
+            )
+            assert saved.status_code == 200
+
+            cleared = (await client.get("/api/v1/memory-processing")).json()
+            assert cleared["llm_backoff_until"] is None
+            assert cleared["llm_backoff_error"] is None
+            assert backoff.allowance() is None
+
+    asyncio.run(scenario())
+
+
+# --- Every write retries itself: provider failures wait, others retry 3 times ---
+
+
+class _FakeSdk:
+    """Stands in for the SDK write path, with its real replay rule.
+
+    Like `HyMemoryClient`, it keeps one outcome per request id and replays a
+    failed one without calling the model. Every write goes out through the
+    breaker's transport, so the provider sees exactly what MemHub sends.
+    """
+
+    def __init__(self, transport: BackedOffModelTransport | None = None) -> None:
+        self.transport = transport
+        self.outcomes: dict[str, str] = {}
+        self.written: list[str] = []
+        self.request_ids: list[str] = []
+        self.fail_with: str | None = None
+
+    async def process_sdk_job(self, records, *, request_id, before_hy_invocation):
+        await before_hy_invocation(True)
+        self.request_ids.append(request_id)
+        if request_id in self.outcomes:
+            if self.outcomes[request_id] == "failed":
+                raise RuntimeError("hy_sdk_write_failed")
+            raise AssertionError("a succeeded id is never sent again")
+        if self.fail_with is not None:
+            self.outcomes[request_id] = "failed"
+            raise RuntimeError(self.fail_with)
+        if self.transport is not None:
+            try:
+                response = await self.transport.handle_async_request(httpx.Request("POST", CHAT))
+            except httpx.TransportError:
+                self.outcomes[request_id] = "unknown"
+                raise
+            if response.status_code >= 400:
+                self.outcomes[request_id] = "failed"
+                raise RuntimeError("hy_sdk_write_failed")
+        self.outcomes[request_id] = "succeeded"
+        self.written.extend(record.evidence_id for record in records)
+        return SimpleNamespace(raw_ids=(f"raw-{request_id}",), memory_ids=(f"m-{request_id}",))
+
+    async def inquire_write_outcome(self, request_id):
+        if self.outcomes.get(request_id) != "succeeded":
+            return None
+        return SimpleNamespace(raw_ids=(f"raw-{request_id}",), memory_ids=(f"m-{request_id}",))
+
+
+class _Evidence:
+    def get(self, evidence_id: str):
+        return SimpleNamespace(evidence_id=evidence_id, source_id="cursor", user_id="local")
+
+
+def _ordered_request(index: int, *, source: str = "cursor") -> WriteRequest:
+    return WriteRequest(
+        internal_session_id="sess-1",
+        batch_identity=BatchIdentity(
+            internal_session_id="sess-1", first_round=index + 1, last_round=index + 1
+        ),
+        evidence_ids=[f"e-{index:03d}"],
+        idempotency_key=f"idem-{index:03d}",
+        source_id=source,
+        event_at=datetime(2026, 10, 1, tzinfo=UTC) + timedelta(minutes=index),
+    )
+
+
+def _jobs(path) -> list[tuple[str, str, int, int, str | None]]:
+    with sqlite3.connect(path) as database:
+        return database.execute(
+            "SELECT idempotency_key,state,sdk_attempt,retries,last_error "
+            "FROM memory_write_jobs ORDER BY queue_seq"
+        ).fetchall()
+
+
+def test_an_outage_with_200_queued_jobs_ends_with_every_job_written_once_in_order(
+    tmp_path,
+) -> None:
+    """The provider refuses every request for five minutes, then recovers.
+
+    No job is lost, skipped, written twice or left `unknown`; the order is
+    the order of the conversation; the provider sees a handful of probes
+    during the outage, not one request per job.
+    """
+    clock = _Clock()
+    backoff = ModelBackoff(clock=clock)
+    calls: list[tuple[float, int]] = []
+
+    def provider(_request: httpx.Request) -> httpx.Response:
+        status = 401 if clock.now < 300.0 else 200
+        calls.append((clock.now, status))
+        return httpx.Response(status)
+
+    sdk = _FakeSdk(
+        BackedOffModelTransport(backoff, profile_id="p:1", inner=httpx.MockTransport(provider))
+    )
+    path = tmp_path / "one-memory.sqlite3"
+    queue = DurableWriteQueue(path)
+    for index in range(200):
+        queue.submit(_ordered_request(index))
+    drain = DurableWriteDrain(
+        queue,
+        execute=_never_execute,
+        owner="outage",
+        model_claim_allowance=backoff.allowance,
+    )
+
+    async def tick() -> None:
+        await asyncio.gather(
+            *(
+                execute_job(
+                    job_id,
+                    queue=queue,
+                    supervisor=sdk,
+                    evidence=_Evidence(),
+                    owner="outage",
+                    model_failures=backoff.attempt,
+                )
+                for job_id in drain.claim(limit=10)
+            )
+        )
+
+    for second in range(800):
+        clock.now = float(second)
+        asyncio.run(tick())
+
+    jobs = _jobs(path)
+    assert [state for _, state, *_ in jobs] == ["completed"] * 200
+    assert sdk.written == [f"e-{index:03d}" for index in range(200)]
+    outage = [at for at, status in calls if status == 401]
+    # One request at 0 s, then one probe per pause: 5, 15, 35, 75, 155 s.
+    assert outage == [0.0, 5.0, 15.0, 35.0, 75.0, 155.0]
+    # The first job was tried seven times; each try had its own SDK id, so
+    # the recovered provider was really called, not a replayed failure.
+    assert jobs[0][2:4] == (6, 0)
+    assert sdk.request_ids[:3] == ["idem-000", "idem-000#r1", "idem-000#r2"]
+    assert all(retries == 0 for *_, retries, _ in jobs)
+
+
+def test_a_failure_of_the_job_itself_is_retried_three_times_then_skipped(tmp_path) -> None:
+    path = tmp_path / "one-memory.sqlite3"
+    queue = DurableWriteQueue(path)
+    first = queue.submit(_ordered_request(0))
+    second = queue.submit(_ordered_request(1))
+    sdk = _FakeSdk()
+    drain = DurableWriteDrain(queue, execute=_never_execute, owner="skip")
+    now = datetime.now(UTC)
+
+    def run(at: datetime) -> tuple[str, ...]:
+        claimed = drain.claim(limit=1, now=at)
+        for job_id in claimed:
+            asyncio.run(
+                execute_job(
+                    job_id,
+                    queue=queue,
+                    supervisor=sdk,
+                    evidence=_Evidence(),
+                    owner="skip",
+                    model_failures=ModelBackoff().attempt,
+                )
+            )
+        return claimed
+
+    sdk.fail_with = "model_content_json_parse_failed"
+    assert run(now) == (first.job_id,)
+    # Each retry waits longer: 30 s, 60 s, 120 s. Until then the claim skips
+    # the job, and the job after it in the conversation waits behind it.
+    assert run(now + timedelta(seconds=20)) == ()
+    assert run(now + timedelta(seconds=40)) == (first.job_id,)
+    assert run(now + timedelta(seconds=150)) == (first.job_id,)
+    assert run(now + timedelta(seconds=400)) == (first.job_id,)
+    assert _jobs(path)[0][1:] == ("failed", 3, 3, "model_content_json_parse_failed")
+    assert queue.get("idem-000").error_code == "model_content_json_parse_failed"
+
+    sdk.fail_with = None
+    assert run(now + timedelta(seconds=401)) == (second.job_id,)
+    assert _jobs(path)[1][1] == "completed"
+    assert sdk.request_ids == [
+        "idem-000",
+        "idem-000#r1",
+        "idem-000#r2",
+        "idem-000#r3",
+        "idem-001",
+    ]
+
+
+def test_a_write_interrupted_mid_call_is_rerun_under_a_new_request_id(tmp_path) -> None:
+    path = tmp_path / "one-memory.sqlite3"
+    queue = DurableWriteQueue(path)
+    record = queue.submit(_ordered_request(0))
+    drain = DurableWriteDrain(queue, execute=_never_execute, owner="crashed")
+    assert drain.claim(limit=1) == (record.job_id,)
+    assert queue.mark_invoked(record.job_id, owner="crashed")
+    # The process stops; on restart the lease has lapsed.
+    with sqlite3.connect(path) as database:
+        database.execute(
+            "UPDATE memory_write_jobs SET lease_expires_at=? WHERE job_id=?",
+            ("2000-01-01T00:00:00+00:00", record.job_id),
+        )
+    assert queue.reclaim_expired() == 1
+    assert queue.get("idem-000").state == "unknown"
+    # Still running on its thread in this process: left alone.
+    assert queue.recover_unknown(in_flight=lambda request_id: request_id == "idem-000") == 0
+
+    assert queue.recover_unknown() == 1
+    assert _jobs(path)[0][1:] == ("pending", 1, 1, "durable_write_interrupted")
+    assert queue.recover_unknown() == 0
+
+    sdk = _FakeSdk()
+    later = datetime.now(UTC) + timedelta(seconds=31)
+    rerun = DurableWriteDrain(queue, execute=_never_execute, owner="restarted")
+    assert rerun.claim(limit=1, now=later) == (record.job_id,)
+    asyncio.run(
+        execute_job(
+            record.job_id, queue=queue, supervisor=sdk, evidence=_Evidence(), owner="restarted"
+        )
+    )
+    assert sdk.request_ids == ["idem-000#r1"]
+    assert queue.get("idem-000").state == "completed"
+
+
+def test_a_write_that_did_land_is_completed_from_its_receipt_not_rerun(tmp_path) -> None:
+    path = tmp_path / "one-memory.sqlite3"
+    queue = DurableWriteQueue(path)
+    record = queue.submit(_ordered_request(0))
+    with sqlite3.connect(path) as database:
+        database.execute(
+            "UPDATE memory_write_jobs SET state='unknown',hy_invoked=1,"
+            "last_error='durable_work_ceiling_exceeded' WHERE job_id=?",
+            (record.job_id,),
+        )
+    sdk = _FakeSdk()
+    sdk.outcomes["idem-000"] = "succeeded"
+    assert queue.recover_unknown() == 1
+    drain = DurableWriteDrain(queue, execute=_never_execute, owner="landed")
+    assert drain.claim(limit=1, now=datetime.now(UTC) + timedelta(seconds=31)) == (record.job_id,)
+    asyncio.run(
+        execute_job(
+            record.job_id, queue=queue, supervisor=sdk, evidence=_Evidence(), owner="landed"
+        )
+    )
+    assert sdk.request_ids == []
+    completed = queue.get("idem-000")
+    assert completed.state == "completed"
+    assert completed.sdk_memory_ids == ("m-idem-000",)
+
+
+def test_unknown_jobs_from_before_the_upgrade_are_handled_once(tmp_path) -> None:
+    from one_memory.memory_tasks import NON_RETRYABLE_POST_WRITE_CODES
+
+    path = tmp_path / "one-memory.sqlite3"
+    queue = DurableWriteQueue(path)
+    plain = queue.submit(_ordered_request(0, source="a"))
+    verified = queue.submit(_ordered_request(1, source="b"))
+    looping = queue.submit(_ordered_request(2, source="c"))
+    with sqlite3.connect(path) as database:
+        for job, code, retries in (
+            (plain, "hy_sdk_write_failed", 0),
+            (verified, NON_RETRYABLE_POST_WRITE_CODES[0], 0),
+            (looping, "durable_write_interrupted", 3),
+        ):
+            database.execute(
+                "UPDATE memory_write_jobs SET state='unknown',hy_invoked=1,attempts=1,"
+                "last_error=?,retries=? WHERE job_id=?",
+                (code, retries, job.job_id),
+            )
+
+    assert queue.recover_unknown() == 3
+    assert queue.recover_unknown() == 0
+    # Reopening the queue (a restart) changes nothing either.
+    assert DurableWriteQueue(path).recover_unknown() == 0
+    states = {key: (state, attempt) for key, state, attempt, _, _ in _jobs(path)}
+    assert states == {
+        "idem-000": ("pending", 1),
+        # The write landed against an authority Core could not verify.
+        "idem-001": ("failed", 0),
+        # A crash loop ends instead of spinning.
+        "idem-002": ("failed", 0),
+    }
+
+
+def test_concurrent_writes_are_all_charged_with_a_provider_failure() -> None:
+    """The breaker cannot tell whose request failed, so every write in flight waits.
+
+    A write the provider did fail must never spend its retries on the outage;
+    a write that failed beside it for its own reason waits for the provider
+    once, and is retried with the rest.
+    """
+    backoff = ModelBackoff(clock=_Clock())
+    with backoff.attempt() as first, backoff.attempt() as second:
+        backoff.record_failure("model_server_error", "p:1", "chat")
+    with backoff.attempt() as later:
+        pass
+    assert (first.failure, second.failure, later.failure) == (
+        "model_server_error",
+        "model_server_error",
+        None,
+    )
+
+
+def test_the_manual_retry_endpoint_is_gone(tmp_path) -> None:
+    async def scenario() -> int:
+        app = create_app(
+            Settings(
+                data_dir=tmp_path / "data",
+                source_home=tmp_path,
+                api_token=SecretStr("local-token"),
+            ),
+            secret_store=InMemorySecretStore(),
+        )
+        async with (
+            app.router.lifespan_context(app),
+            AsyncClient(
+                transport=ASGITransport(app=app),
+                base_url="http://test",
+                headers={"Authorization": "Bearer local-token"},
+            ) as client,
+        ):
+            response = await client.post(
+                "/api/v1/memory-processing/retry-unknown", json={"confirm": True}
+            )
+            return response.status_code
+
+    assert asyncio.run(scenario()) in {404, 405}
+
+
+# --- hy-memory 2.0.13: a model failure is `success: false`, never a silent success ---
+
+
+class _Sdk2013Client:
+    """`HyMemoryClient.add` as hy-memory 2.0.13 answers it.
+
+    Each write makes one model call through MemHub's transport, so the
+    breaker sees what the provider answered. The SDK turns a failed or
+    unusable model reply into `success: false` with its stable codes; the
+    shape of those results is the SDK's own (`_mark_reconcile_failure`,
+    `CodingWriter`).
+    """
+
+    def __init__(self, transport: BackedOffModelTransport) -> None:
+        self.transport = transport
+        self.reply = "[]"
+        self.messages: list[list[dict[str, str]]] = []
+
+    def add(self, messages, **_kwargs):
+        self.messages.append(messages)
+        coding = any(message["role"] == "tool" for message in messages)
+        try:
+            response = asyncio.run(self.transport.handle_async_request(httpx.Request("POST", CHAT)))
+        except httpx.TransportError:
+            return self._failed(coding, "LLM_UNAVAILABLE", "LLM_ERROR")
+        if response.status_code >= 400:
+            return self._failed(coding, "LLM_UNAVAILABLE", "LLM_ERROR")
+        if not self.reply:
+            return self._failed(coding, "EMPTY_RESPONSE", "EMPTY_RESPONSE")
+        if not self.reply.startswith("["):
+            return self._failed(coding, "JSON_PARSE_FAILED", "JSON_PARSE_FAILED")
+        return {"success": True, "memory_ids": ["m-1"]}
+
+    @staticmethod
+    def _failed(coding: bool, reconcile_cause: str, coding_code: str) -> dict[str, object]:
+        if coding:
+            return {"success": False, "agent_error_code": coding_code}
+        return {
+            "success": False,
+            "error_code": 502,
+            "agent_error_code": "RECONCILE_FAILED",
+            "reconcile_error_code": reconcile_cause,
+        }
+
+
+class _Sdk2013Handle:
+    mode = "pro"
+
+    def __init__(self, client: _Sdk2013Client) -> None:
+        self.sdk = client
+
+    async def client(self) -> _Sdk2013Client:
+        return self.sdk
+
+
+class _Sdk2013Supervisor:
+    def __init__(self, client: _Sdk2013Client) -> None:
+        self.processor = SdkWriteProcessor(_Sdk2013Handle(client))  # type: ignore[arg-type]
+
+    async def process_sdk_job(self, records, *, request_id, before_hy_invocation):
+        return await self.processor.process_sdk_job(
+            records, request_id=request_id, before_hy_invocation=before_hy_invocation
+        )
+
+    async def inquire_write_outcome(self, _request_id):
+        return None
+
+
+class _Turns:
+    """Evidence for one conversation batch: a chat turn, or a coding turn with tools."""
+
+    def __init__(self, roles: tuple[str, ...]) -> None:
+        self.records = {
+            f"e-{index}": materialize_write_input(
+                EvidenceInput(
+                    user_id="local",
+                    source_id="cursor",
+                    conversation_id="sess-1",
+                    message_id=f"msg-{index}",
+                    role=role,
+                    written_by=WrittenBy.PERSON,
+                    created_at=datetime(2026, 10, 1, tzinfo=UTC),
+                    verbatim=f"{role} says something worth keeping ({index})",
+                    origin_meta={EvidenceOrigin.FILE: OriginMetadata()},
+                )
+            )
+            for index, role in enumerate(roles)
+        }
+
+    def get(self, evidence_id: str):
+        return self.records[evidence_id]
+
+    def request(self) -> WriteRequest:
+        return WriteRequest(
+            internal_session_id="sess-1",
+            batch_identity=BatchIdentity(internal_session_id="sess-1", first_round=1, last_round=1),
+            evidence_ids=list(self.records),
+            idempotency_key="idem-000",
+            source_id="cursor",
+        )
+
+
+def _outage_then_recovery(tmp_path, roles: tuple[str, ...], failure) -> tuple[list, list]:
+    clock = _Clock()
+    backoff = ModelBackoff(clock=clock)
+    calls: list[float] = []
+
+    def provider(request: httpx.Request) -> httpx.Response:
+        calls.append(clock.now)
+        if clock.now < 60.0:
+            return failure(request)
+        return httpx.Response(200)
+
+    client = _Sdk2013Client(
+        BackedOffModelTransport(backoff, profile_id="p:1", inner=httpx.MockTransport(provider))
+    )
+    turns = _Turns(roles)
+    path = tmp_path / "one-memory.sqlite3"
+    queue = DurableWriteQueue(path)
+    queue.submit(turns.request())
+    drain = DurableWriteDrain(
+        queue, execute=_never_execute, owner="outage", model_claim_allowance=backoff.allowance
+    )
+    seen: list[tuple[str, int, int, str | None]] = []
+    for second in range(120):
+        clock.now = float(second)
+        for job_id in drain.claim(limit=1):
+            asyncio.run(
+                execute_job(
+                    job_id,
+                    queue=queue,
+                    supervisor=_Sdk2013Supervisor(client),
+                    evidence=turns,
+                    owner="outage",
+                    model_failures=backoff.attempt,
+                )
+            )
+            seen.append(_jobs(path)[0][1:])
+    assert all(len(sent) == len(roles) for sent in client.messages)
+    return calls, seen
+
+
+def _timeout(request: httpx.Request) -> httpx.Response:
+    raise httpx.ReadTimeout("provider timed out", request=request)
+
+
+@pytest.mark.parametrize(
+    ("failure", "code"),
+    [
+        (lambda _request: httpx.Response(401), "model_auth_failed"),
+        (lambda _request: httpx.Response(503), "model_server_error"),
+        (_timeout, "model_timeout"),
+    ],
+    ids=["401", "503", "timeout"],
+)
+def test_a_reconcile_model_failure_waits_for_the_provider_and_completes_after_it(
+    tmp_path, failure, code
+) -> None:
+    """hy-memory 2.0.13 fails the write when reconcile cannot reach its model.
+
+    The breaker saw the provider fail, so the job waits in place without
+    spending a retry, is tried once per pause, and lands after recovery.
+    """
+    calls, seen = _outage_then_recovery(tmp_path, ("user", "assistant"), failure)
+    assert calls == [0.0, 5.0, 15.0, 35.0, 75.0]
+    assert seen[:-1] == [("pending", attempt, 0, code) for attempt in range(1, 5)]
+    assert seen[-1] == ("completed", 4, 0, None)
+
+
+def test_a_coding_batch_whose_extractor_fails_at_the_provider_waits_like_chat(tmp_path) -> None:
+    """Tool turns go down the SDK's coding path; its `LLM_ERROR` waits the same way."""
+    calls, seen = _outage_then_recovery(
+        tmp_path, ("user", "assistant", "tool", "assistant"), lambda _request: httpx.Response(502)
+    )
+    assert calls == [0.0, 5.0, 15.0, 35.0, 75.0]
+    assert seen[:-1] == [("pending", attempt, 0, "model_server_error") for attempt in range(1, 5)]
+    assert seen[-1] == ("completed", 4, 0, None)
+
+
+@pytest.mark.parametrize(
+    ("reply", "code"),
+    [
+        ("", "hy_sdk_reconcile_empty_response"),
+        ("I am not sure what you mean.", "hy_sdk_reconcile_json_parse_failed"),
+    ],
+    ids=["empty", "unparseable"],
+)
+def test_a_reconcile_reply_the_sdk_cannot_use_is_retried_then_failed_with_its_cause(
+    tmp_path, reply, code
+) -> None:
+    """HTTP 200 with nothing usable is not a provider failure: 3 retries, then `failed`.
+
+    The job's `error_code` names the SDK's cause instead of a bare
+    `hy_sdk_write_failed`, and the provider is never paused.
+    """
+    backoff = ModelBackoff(clock=_Clock())
+    client = _Sdk2013Client(
+        BackedOffModelTransport(
+            backoff, profile_id="p:1", inner=httpx.MockTransport(lambda _r: httpx.Response(200))
+        )
+    )
+    client.reply = reply
+    turns = _Turns(("user", "assistant"))
+    path = tmp_path / "one-memory.sqlite3"
+    queue = DurableWriteQueue(path)
+    queue.submit(turns.request())
+    drain = DurableWriteDrain(queue, execute=_never_execute, owner="bad-reply")
+    now = datetime.now(UTC)
+    for offset in (0, 40, 150, 400):
+        for job_id in drain.claim(limit=1, now=now + timedelta(seconds=offset)):
+            asyncio.run(
+                execute_job(
+                    job_id,
+                    queue=queue,
+                    supervisor=_Sdk2013Supervisor(client),
+                    evidence=turns,
+                    owner="bad-reply",
+                    model_failures=backoff.attempt,
+                )
+            )
+    assert _jobs(path)[0][1:] == ("failed", 3, 3, code)
+    assert queue.get("idem-000").error_code == code
+    assert len(client.messages) == 4
+    assert backoff.allowance() is None
+
+
+@pytest.mark.parametrize(
+    ("result", "code"),
+    [
+        (
+            {"agent_error_code": "RECONCILE_FAILED", "reconcile_error_code": "LLM_UNAVAILABLE"},
+            "hy_sdk_reconcile_llm_unavailable",
+        ),
+        (
+            {"agent_error_code": "RECONCILE_FAILED", "reconcile_error_code": "RECONCILE_EXCEPTION"},
+            "hy_sdk_reconcile_exception",
+        ),
+        ({"agent_error_code": "RECONCILE_FAILED"}, "hy_sdk_reconcile_failed"),
+        ({"agent_error_code": "EMBEDDING_FAILED"}, "hy_sdk_embedding_failed"),
+        ({"agent_error_code": "JSON_PARSE_FAILED"}, "hy_sdk_json_parse_failed"),
+        ({"agent_error_code": "provider said: bad key sk-123"}, "hy_sdk_write_failed"),
+        ({"agent_error_code": 502}, "hy_sdk_write_failed"),
+        ({}, "hy_sdk_write_failed"),
+    ],
+)
+def test_a_failed_sdk_write_keeps_only_the_sdks_stable_code(result, code) -> None:
+    assert sdk_write_failure_code({"success": False, **result}) == code

memhub/apps/core/tests/test_multi_user_runtime.py

@@ -334,7 +334,9 @@ def test_another_users_memory_id_answers_404_for_read_update_and_delete(
 
         assert (await client.get(path)).status_code == 404
         assert (await client.put(path, json={"content": "stolen"})).status_code == 404
-        assert (await client.delete(path)).status_code == 204
+        refused = await client.delete(path)
+        assert refused.status_code == 404
+        assert refused.json()["detail"] == "memory_not_found"
         assert sdk.memories[wife_memory]["content"] == "wife drinks coffee"
 
         own = await client.get(path, params={"user_id": "wife"})
@@ -343,6 +345,36 @@ def test_another_users_memory_id_answers_404_for_read_update_and_delete(
         assert updated.status_code == 200
         assert (await client.delete(path, params={"user_id": "wife"})).status_code == 204
         assert wife_memory not in sdk.memories
+        # A second delete (a double click) finds nothing: 404, already gone.
+        again = await client.delete(path, params={"user_id": "wife"})
+        assert again.status_code == 404
+        assert again.json()["detail"] == "memory_not_found"
+
+    run_with_sdk(tmp_path, monkeypatch, scenario)
+
+
+@pytest.mark.fresh_sdk
+def test_a_delete_that_loses_the_race_answers_404_like_a_missing_id(tmp_path, monkeypatch) -> None:
+    """Read as the caller's own, then gone before the SDK deletes it."""
+
+    async def scenario(app, sdk, client):
+        await _write_both_users(app, sdk, client)
+        [mine] = [
+            memory_id
+            for memory_id, row in sdk.memories.items()
+            if row["content"] == "local drinks tea"
+        ]
+        original = sdk.delete
+
+        def raced(memory_id, kind=None, variant=None):
+            sdk.memories.pop(memory_id, None)
+            return original(memory_id, kind=kind, variant=variant)
+
+        sdk.delete = raced  # type: ignore[method-assign]
+        response = await client.delete(f"/api/v2/memories/{mine}")
+        missing = await client.delete("/api/v2/memories/no-such-memory")
+        assert _observed(response) == _observed(missing)
+        assert response.status_code == 404
 
     run_with_sdk(tmp_path, monkeypatch, scenario)
 
@@ -426,6 +458,52 @@ async def _true() -> bool:
     return True
 
 
+@pytest.mark.fresh_sdk
+@pytest.mark.parametrize("user", [None, "wife"])
+def test_every_read_echoes_the_user_it_was_read_for(tmp_path, monkeypatch, user) -> None:
+    """Each read names the user it answered for: the one asked for, else `local`."""
+
+    async def scenario(app, sdk, client):
+        await _write_both_users(app, sdk, client)
+        monkeypatch.setattr(
+            "one_memory.api._recall_model_ready", lambda _app: _true(), raising=True
+        )
+        app.state.recall_target = _sdk_recall_target(app, "local")
+        expected = user or "local"
+        params = {} if user is None else {"user_id": user}
+        body = {} if user is None else {"user_id": user}
+        reads = [
+            await client.get("/api/v2/memory-library", params=params),
+            await client.get("/api/v2/memory-library", params={**params, "query": "route"}),
+            await client.get("/api/v2/memory-library/layers", params=params),
+            await client.get("/api/v2/user-profile", params=params),
+            await client.get("/api/v2/home-summary", params=params),
+            await client.get("/api/v2/memories/graph", params=params),
+            await client.get("/api/v2/raw", params=params),
+            await client.post(
+                "/api/v2/context/search", json={"query": "drinks", "kinds": ["memory"], **body}
+            ),
+            await client.post("/api/v1/recall", json={"query": "drinks", **body}),
+            await client.post("/api/v2/memories/ask", json={"question": "what drink", **body}),
+        ]
+        for response in reads:
+            assert response.status_code == 200, (response.request.url, response.text)
+            assert response.json()["user_id"] == expected, response.request.url
+
+        async with client.stream(
+            "POST", "/api/v2/memories/ask/stream", json={"question": "what drink", **body}
+        ) as streamed:
+            events = [
+                json.loads(line[5:])
+                async for line in streamed.aiter_lines()
+                if line.startswith("data:")
+            ]
+        assert events[0]["type"] == "recall"
+        assert events[0]["user_id"] == expected
+
+    run_with_sdk(tmp_path, monkeypatch, scenario)
+
+
 @pytest.mark.fresh_sdk
 @pytest.mark.parametrize(
     ("method", "path", "kwargs"),
@@ -569,6 +647,26 @@ def test_a_hermes_root_scan_never_reads_its_profiles(tmp_path) -> None:
     assert _scan_texts(wife, tmp_path) == ["I am the wife", "hello", "wife's transcript"]
 
 
+def test_a_profiles_directory_is_skipped_at_any_depth(tmp_path) -> None:
+    """A root above the Hermes home still never reads `.hermes/profiles/**`."""
+    home = tmp_path / "home"
+    hermes, _wife = _hermes_homes(home)
+    (hermes / "sessions").mkdir()
+    (hermes / "sessions" / "own.jsonl").write_text(
+        json.dumps({"type": "message", "role": "user", "content": "own transcript"}) + "\n"
+    )
+    nested = hermes / "sessions" / "profiles" / "kid" / "sessions"
+    nested.mkdir(parents=True)
+    (nested / "k.jsonl").write_text(
+        json.dumps({"type": "message", "role": "user", "content": "kid's transcript"}) + "\n"
+    )
+
+    above = _scan_texts(home, tmp_path)
+    assert "I am the wife" not in above and "kid's transcript" not in above
+    assert set(above) == {"I am the husband", "hi", "own transcript"}
+    assert "kid's transcript" not in _scan_texts(hermes, tmp_path)
+
+
 def _jobs(database: Path) -> list[sqlite3.Row]:
     with sqlite3.connect(database) as db:
         db.row_factory = sqlite3.Row
@@ -719,6 +817,87 @@ def test_a_migrated_home_with_the_old_grant_triggers_can_connect_and_revoke(tmp_
     asyncio.run(scenario())
 
 
+async def _connect(client, user_id: str, root: Path | None = None, **extra):
+    body: dict[str, object] = {"source_ids": ["hermes"], "request_id": str(uuid4()), **extra}
+    if user_id != "local":
+        body["user_id"] = user_id
+    if root is not None:
+        body["root"] = str(root)
+    return await client.post("/api/v1/sources/connect", json=body)
+
+
+@pytest.mark.fresh_sdk
+def test_a_hermes_root_that_is_the_profiles_container_is_refused(tmp_path) -> None:
+    async def scenario():
+        home = tmp_path / "home"
+        hermes, _wife = _hermes_homes(home)
+        app = application(tmp_path, home=home)
+        async with app.router.lifespan_context(app), client_for(app) as client:
+            for user in ("wife", "local"):
+                refused = await _connect(client, user, hermes / "profiles")
+                assert refused.status_code == 422, refused.text
+                assert refused.json()["detail"] == "hermes_root_is_profiles_container"
+            assert app.state.source_grant_store.grants() == ()
+
+    asyncio.run(scenario())
+
+
+@pytest.mark.fresh_sdk
+def test_two_users_on_one_hermes_root_or_nested_roots_are_refused(tmp_path) -> None:
+    async def scenario():
+        home = tmp_path / "home"
+        hermes, wife = _hermes_homes(home)
+        (wife / "sessions").mkdir()
+        link = home / "hermes-link"
+        link.symlink_to(hermes, target_is_directory=True)
+        app = application(tmp_path, home=home)
+        async with app.router.lifespan_context(app), client_for(app) as client:
+            location = (await client.post("/api/v1/sources/hermes/location")).json()
+            local = await _connect(client, "local", source_roots={"hermes": location["root_id"]})
+            assert local.status_code == 200, local.text
+            # Same root, the same root through a symlink, a root inside it
+            # that is not `profiles/<name>`, and a root above it.
+            for root in (hermes, link, wife / "sessions", home):
+                refused = await _connect(client, "kid", root)
+                assert refused.status_code == 409, (root, refused.text)
+                assert refused.json()["detail"] == "hermes_root_overlaps_other_user"
+            # The standard layout: `local` on ~/.hermes, wife on its profile.
+            accepted = await _connect(client, "wife", wife)
+            assert accepted.status_code == 200, accepted.text
+            # Another user on wife's own root is refused too.
+            twin = await _connect(client, "wife2", wife)
+            assert twin.status_code == 409
+            # Once wife's grant is revoked her root is free again.
+            await client.post("/api/v1/sources/hermes/revoke", params={"user_id": "wife"})
+            assert (await _connect(client, "wife2", wife)).status_code == 200
+
+    asyncio.run(scenario())
+
+
+@pytest.mark.fresh_sdk
+def test_local_cannot_take_another_users_hermes_root(tmp_path) -> None:
+    """The check runs for `local`'s own connect too, not only for other users."""
+
+    async def scenario():
+        home = tmp_path / "home"
+        hermes, _wife = _hermes_homes(home)
+        other = home / "elsewhere" / ".hermes"
+        _hermes_state_db(other, [(1, "s", "user", "elsewhere")])
+        app = application(tmp_path, home=home)
+        async with app.router.lifespan_context(app), client_for(app) as client:
+            # wife took ~/.hermes itself, which is `local`'s default root.
+            taken = await _connect(client, "wife", hermes)
+            assert taken.status_code == 200, taken.text
+            location = (await client.post("/api/v1/sources/hermes/location")).json()
+            refused = await _connect(client, "local", source_roots={"hermes": location["root_id"]})
+            assert refused.status_code == 409, refused.text
+            assert refused.json()["detail"] == "hermes_root_overlaps_other_user"
+            # `local` on a root of its own that does not overlap is fine.
+            assert (await _connect(client, "local", other)).status_code == 200
+
+    asyncio.run(scenario())
+
+
 @pytest.mark.fresh_sdk
 def test_only_hermes_takes_another_user_or_a_custom_root(tmp_path) -> None:
     async def scenario():
@@ -852,7 +1031,7 @@ def test_another_users_id_answers_exactly_like_an_id_that_does_not_exist(
             other = await client.request(method, theirs, **kwargs)
             absent = await client.request(method, missing, **kwargs)
             assert _observed(other) == _observed(absent), (method, theirs)
-            assert other.status_code == (204 if method == "DELETE" else 404)
+            assert other.status_code == 404
         assert sdk.memories == before
 
     run_with_sdk(tmp_path, monkeypatch, scenario)

memhub/apps/core/tests/test_recall_raw_fallback.py

@@ -259,3 +259,52 @@ def test_recall_route_falls_back_and_keeps_the_raw_grant(tmp_path, monkeypatch):
     # A host granted recall alone may not read original conversations.
     assert recall_only["mode"] == "raw" and recall_only["hits"] == []
     assert len(searched) == 1
+
+
+def test_the_total_recall_budget_stays_under_the_brokers_wait():
+    from one_memory.recall_fallback import recall_total_timeout_seconds
+
+    assert recall_total_timeout_seconds(800) == pytest.approx(3.8)
+    # The broker gives Core 15 seconds; Core answers before it gives up.
+    assert recall_total_timeout_seconds(60_000) == 12.0
+
+
+@pytest.mark.fresh_sdk
+def test_a_recall_that_cannot_finish_in_time_is_a_clear_timeout(tmp_path, monkeypatch):
+    """A recall stuck behind the SDK answers 504 `recall_timeout`, not nothing (#231)."""
+    from one_memory import recall_fallback
+
+    async def stuck(*_args, **_kwargs):
+        await asyncio.Event().wait()
+
+    monkeypatch.setattr(recall_fallback, "recall_with_fallback", stuck)
+    monkeypatch.setattr(recall_fallback, "recall_total_timeout_seconds", lambda _ms: 0.2)
+
+    async def scenario():
+        app = create_app(
+            Settings(
+                data_dir=tmp_path / "data",
+                source_home=tmp_path,
+                api_token=SecretStr("recall-test"),
+                imports_enabled=False,
+                automatic_memory_processing=False,
+                live_sync_enabled=False,
+            ),
+            secret_store=InMemorySecretStore(),
+        )
+        async with (
+            app.router.lifespan_context(app),
+            AsyncClient(
+                transport=ASGITransport(app=app),
+                base_url="http://test",
+                headers={"Authorization": "Bearer recall-test"},
+            ) as client,
+        ):
+            return await asyncio.wait_for(
+                client.post("/api/v1/recall", json={"query": "数据库"}), 5
+            )
+
+    response = asyncio.run(scenario())
+
+    assert response.status_code == 504
+    assert response.json()["detail"] == "recall_timeout"

memhub/apps/core/tests/test_sdk_data_plane_migration.py

@@ -1124,13 +1124,13 @@ def test_pre_upgrade_unknown_writes_are_settled_at_cutover_not_retried(store):
     surviving = DurableWriteQueue(store.database_path, sdk_authority=True)
     assert surviving.unknown_jobs() == ()
     # Never requeued: they may already have written.
-    assert surviving.retry_unknown_confirmed(unknown[0]) == 0
+    assert surviving.recover_unknown() == 0
     assert surviving.readmit_parked() == 0
     assert PENDING not in {state for state, _, _ in rows.values()}
 
 
-def test_retrying_unknown_writes_works_after_the_legacy_tables_are_dropped(store):
-    """The retry button raised `no such table: memory_tasks` after an upgrade."""
+def test_recovering_unknown_writes_works_after_the_legacy_tables_are_dropped(store):
+    """The old retry button raised `no such table: memory_tasks` after an upgrade."""
     from one_memory.memory_server.durable_queue import PENDING, UNKNOWN
     from one_memory.target_schema import drop_legacy_tables
 
@@ -1162,14 +1162,10 @@ def test_retrying_unknown_writes_works_after_the_legacy_tables_are_dropped(store
         surviving = DurableWriteQueue(store.database_path, sdk_authority=sdk_authority)
         make_unknown("model_content_outcome_unknown", 1)
         assert surviving.resolve_unknown_from_linked_output(identifier) is False
-        assert surviving.retry_unknown_confirmed(identifier) == 1
+        assert surviving.recover_unknown() == 1
         assert surviving.get("after-upgrade").state == PENDING
-
-        make_unknown("hy_memory_timeout", 1)
-        since = datetime.now(UTC)
-        assert surviving.retry_timed_out_unknown_after_reconcile(older_than=since) == 1
-        make_unknown("model_content_outcome_unknown", 1)
-        assert surviving.retry_first_unknown_after_reconcile(older_than=since) == 1
+        with main_database(store.database_path).write() as database, database:
+            database.execute("UPDATE memory_write_jobs SET retries=0 WHERE job_id=?", (identifier,))
         if sdk_authority:
             # The SDK-authority queue never brings a dropped table back.
             assert legacy_tables_present(store.database_path) == ()
@@ -1617,7 +1613,7 @@ def test_a_completed_sdk_write_does_not_touch_retired_evidence(store) -> None:
     class Supervisor:
         async def process_sdk_job(self, records, *, request_id, before_hy_invocation):
             del records, request_id
-            await before_hy_invocation()
+            await before_hy_invocation(True)
             return SimpleNamespace(raw_ids=("raw-1",), memory_ids=("m-1",))
 
     asyncio.run(

memhub/apps/core/tests/test_sdk_migration_bundle.py

@@ -91,7 +91,7 @@ def test_bundle_contains_management_sdk_config_and_verified_manifest(tmp_path):
     assert manifest["bundle_id"] == "migration-1"
     assert manifest["sdk_namespace"] == "governed-v2"
     assert manifest["runtime_build"] == "build-13"
-    assert manifest["snapshot_sdk_version"] == "2.0.10"
+    assert manifest["snapshot_sdk_version"] == "2.0.13"
     paths = {item["path"]: item for item in manifest["files"]}
     assert {
         "management/one-memory.sqlite3",

memhub/apps/core/tests/test_sedimentation_switch.py

@@ -1,13 +1,12 @@
-"""The sedimentation API persists decisions and resumes the SDK queue."""
-
-import asyncio
-import threading
+"""The sedimentation API persists decisions without rewriting parked work."""
 
 from fastapi.testclient import TestClient
 from pydantic import SecretStr
 
 from one_memory.api import create_app
 from one_memory.config import Settings
+from one_memory.memory_server.contracts import BatchIdentity, WriteRequest
+from one_memory.memory_server.durable_queue import WAITING_FOR_PERMISSION
 
 
 def _app(tmp_path):
@@ -25,51 +24,62 @@ def _app(tmp_path):
     )
 
 
-def test_sedimentation_route_persists_and_resumes_without_restart(tmp_path) -> None:
+def test_sedimentation_route_persists_without_restart(tmp_path) -> None:
     with TestClient(_app(tmp_path), headers={"Authorization": "Bearer test"}) as client:
         assert client.get("/api/v1/sedimentation").json()["enabled"] is True
-        assert client.put(
-            "/api/v1/sedimentation", json={"enabled": False}
-        ).json()["enabled"] is False
+        assert (
+            client.put("/api/v1/sedimentation", json={"enabled": False}).json()["enabled"] is False
+        )
         assert client.get("/api/v1/sedimentation").json()["enabled"] is False
-        assert client.put(
-            "/api/v1/sedimentation", json={"enabled": True}
-        ).json()["enabled"] is True
+        assert client.put("/api/v1/sedimentation", json={"enabled": True}).json()["enabled"] is True
 
 
-def test_switch_answers_before_sdk_queue_resume_finishes(tmp_path, monkeypatch) -> None:
+def test_switch_does_not_run_the_broad_parked_queue_resume(tmp_path, monkeypatch) -> None:
     app = _app(tmp_path)
-    released = threading.Event()
-    finished = threading.Event()
+    called = False
 
     with TestClient(app, headers={"Authorization": "Bearer test"}) as client:
-        async def slow_resume() -> None:
-            await asyncio.get_running_loop().run_in_executor(None, released.wait, 10.0)
-            finished.set()
 
-        monkeypatch.setattr(app.state.sdk_memory_runtime, "resume_allowed", slow_resume)
-        assert client.put(
-            "/api/v1/sedimentation", json={"enabled": False}
-        ).status_code == 200
+        async def forbidden_resume() -> None:
+            nonlocal called
+            called = True
+
+        monkeypatch.setattr(app.state.sdk_memory_runtime, "resume_allowed", forbidden_resume)
+        assert client.put("/api/v1/sedimentation", json={"enabled": False}).status_code == 200
         resumed = client.put("/api/v1/sedimentation", json={"enabled": True})
 
         assert resumed.status_code == 200
         assert resumed.json()["enabled"] is True
-        assert finished.is_set() is False
-        released.set()
+        assert called is False
 
 
-def test_a_failing_sdk_queue_resume_does_not_fail_the_switch(tmp_path, monkeypatch) -> None:
+def test_switch_does_not_rewrite_permission_parked_jobs(tmp_path) -> None:
     app = _app(tmp_path)
     with TestClient(app, headers={"Authorization": "Bearer test"}) as client:
-        async def broken_resume() -> None:
-            raise RuntimeError("sdk_queue_unavailable")
+        queue = app.state.memory_write_queue
+        queue.evidence = None
+        request = WriteRequest(
+            internal_session_id="session-1",
+            source_id="cursor",
+            batch_identity=BatchIdentity(
+                internal_session_id="session-1",
+                first_round=1,
+                last_round=1,
+            ),
+            evidence_ids=["e-1"],
+            idempotency_key="permission-parked",
+        )
+        record = queue.submit(request)
+        queue.settle(
+            record.job_id,
+            state=WAITING_FOR_PERMISSION,
+            error_code="model_content_permission_required",
+            hy_invoked=False,
+        )
 
-        monkeypatch.setattr(app.state.sdk_memory_runtime, "resume_allowed", broken_resume)
-        assert client.put(
-            "/api/v1/sedimentation", json={"enabled": False}
-        ).status_code == 200
-        resumed = client.put("/api/v1/sedimentation", json={"enabled": True})
+        assert client.put("/api/v1/sedimentation", json={"enabled": False}).status_code == 200
+        assert client.put("/api/v1/sedimentation", json={"enabled": True}).status_code == 200
 
-        assert resumed.status_code == 200
-        assert resumed.json()["enabled"] is True
+        parked = queue.get("permission-parked")
+        assert parked.state == WAITING_FOR_PERMISSION
+        assert parked.detail == "model_content_permission_required"

memhub/apps/core/tests/test_ui_language.py

@@ -0,0 +1,331 @@
+"""The App's display language, and the SDK prompt language it implies.
+
+The owner's rule (#243): every display language, zh-Hans and en included, is
+passed as `MemoryConfig.language` (hy-memory 2.0.11); only an unset language
+passes none, so the SDK keeps detecting zh/en exactly as before. A change rebuilds the
+handles the way a mode or feature change does, and the language never touches
+the vector collection identity.
+"""
+
+from __future__ import annotations
+
+import asyncio
+import dataclasses
+import json
+from contextlib import asynccontextmanager
+from pathlib import Path
+from types import SimpleNamespace
+
+import pytest
+from httpx import ASGITransport, AsyncClient
+from pydantic import SecretStr, ValidationError
+
+from one_memory import hy_sdk_runtime, sdk_read_handle, sdk_write_processor
+from one_memory.api import create_app
+from one_memory.config import Settings
+from one_memory.memory_server.config_state import ConfigDocument, ConfigStore
+from one_memory.secrets import InMemorySecretStore
+from one_memory.ui_language import UI_LANGUAGES, normalize_ui_language, sdk_language
+
+TOKEN = "ui-language-test"
+#: Every code is passed to the SDK, zh-Hans included.
+PASSED = ("en", "zh-Hans", "zh-Hant", "ja", "es", "de", "pt", "fr", "ko", "ru", "id")
+
+
+@pytest.fixture(autouse=True)
+def _clean_sdk_env(monkeypatch):
+    """The SDK's own `MEMORY_LANGUAGE` feeds its default; tests start without it."""
+    monkeypatch.delenv("MEMORY_LANGUAGE", raising=False)
+
+
+def _config(tmp_path: Path, language: str | None):
+    return hy_sdk_runtime.build_sdk_config(
+        hy_sdk_runtime.builtin_retrieval_snapshot(),
+        api_key=None,
+        data_dir=tmp_path,
+        language=language,
+    )
+
+
+# --- the rule -------------------------------------------------------------------
+
+
+def test_eleven_codes_and_the_legacy_chinese_code() -> None:
+    assert PASSED == UI_LANGUAGES
+    assert len(UI_LANGUAGES) == 11
+    # Earlier App builds stored zh-CN; it is zh-Hans now.
+    assert normalize_ui_language("zh-CN") == "zh-Hans"
+    assert normalize_ui_language("system") is None
+    assert normalize_ui_language("xx") is None
+    assert normalize_ui_language(None) is None
+
+
+def test_only_an_unset_language_leaves_the_sdk_to_detect() -> None:
+    assert sdk_language(None) is None
+    assert sdk_language("system") is None
+    assert sdk_language("xx") is None
+    # zh-Hans is passed like every other code; the legacy zh-CN maps to it.
+    assert sdk_language("zh-Hans") == "zh-Hans"
+    assert sdk_language("zh-CN") == "zh-Hans"
+    for code in PASSED:
+        assert sdk_language(code) == code
+
+
+def test_no_language_builds_the_config_of_before(tmp_path) -> None:
+    assert _config(tmp_path, None).language is None
+    assert _config(tmp_path, sdk_language("zh-Hans")).language == "zh-Hans"
+
+
+@pytest.mark.parametrize("code", PASSED)
+def test_a_passed_code_reaches_the_memory_config(tmp_path, code) -> None:
+    config = _config(tmp_path, sdk_language(code))
+    assert config.language == code
+
+
+def test_the_language_never_changes_the_collection_identity(tmp_path) -> None:
+    def identity(config):
+        return (
+            dataclasses.asdict(config.vector_store),
+            config.embedder.model,
+            config.embedder.embedding_dims,
+            config.graph_store.db_path,
+            config.cache.db_path,
+        )
+
+    baseline = identity(_config(tmp_path, None))
+    for code in PASSED:
+        assert identity(_config(tmp_path, code)) == baseline
+
+
+def test_acquire_client_passes_the_language_only_when_there_is_one(tmp_path, monkeypatch) -> None:
+    calls: list[dict] = []
+    monkeypatch.setattr(
+        hy_sdk_runtime, "_acquire_client", lambda profile, **kwargs: calls.append(kwargs)
+    )
+    profile = hy_sdk_runtime.builtin_retrieval_snapshot()
+    hy_sdk_runtime.acquire_client(profile, api_key=None, data_dir=tmp_path, mode="pro")
+    hy_sdk_runtime.acquire_client(
+        profile, api_key=None, data_dir=tmp_path, mode="pro", language="ja"
+    )
+    assert "language" not in calls[0]
+    assert calls[1]["language"] == "ja"
+
+
+# --- the stored setting -----------------------------------------------------------
+
+
+def test_the_setting_persists_and_an_untouched_install_writes_none(tmp_path) -> None:
+    store = ConfigStore(tmp_path)
+    store.set_sync("cursor", True)
+    assert "ui_language" not in json.loads((tmp_path / "config.json").read_text())
+    assert store.ui_language() is None
+    store.set_ui_language("ja")
+    assert json.loads((tmp_path / "config.json").read_text())["ui_language"] == "ja"
+    assert ConfigStore(tmp_path).ui_language() == "ja"
+    store.set_ui_language(None)
+    assert ConfigStore(tmp_path).ui_language() is None
+    with pytest.raises(ValueError, match="invalid_ui_language"):
+        store.set_ui_language("zh-CN")  # type: ignore[arg-type]
+    with pytest.raises(ValidationError):
+        ConfigDocument.model_validate({"ui_language": "klingon"})
+
+
+# --- rebuilding handles -------------------------------------------------------------
+
+
+class _FakeHandle:
+    def __init__(self, language: str | None) -> None:
+        self.language = language
+        self.closed = False
+
+    async def client(self):
+        return self
+
+    async def close(self):
+        self.closed = True
+
+
+def test_the_read_handle_rebuilds_its_client_when_the_language_changes(
+    monkeypatch, tmp_path
+) -> None:
+    language: list[str | None] = [None]
+    made: list[_FakeHandle] = []
+
+    def handle_for(profile, *, api_key, data_dir, mode=None, features=(), language=None):
+        made.append(_FakeHandle(language))
+        return made[-1]
+
+    monkeypatch.setattr(sdk_read_handle, "SdkClientHandle", handle_for)
+
+    class _NoProfile:
+        def active_identity(self):
+            return None
+
+    reads = sdk_read_handle.ActiveProfileReadHandle(
+        profiles=_NoProfile(),  # type: ignore[arg-type]
+        secrets=None,  # type: ignore[arg-type]
+        data_dir=tmp_path,
+        memory_mode=lambda: "pro",
+        language=lambda: language[0],
+    )
+
+    async def scenario():
+        # A use lasts as long as the task that asked, so each read is a task.
+        old = await asyncio.create_task(reads.client())
+        assert old.language is None
+        assert await asyncio.create_task(reads.client()) is old
+        language[0] = "ja"
+        fresh = await asyncio.create_task(reads.client())
+        assert fresh is not old and fresh.language == "ja"
+        for _ in range(10):
+            await asyncio.sleep(0)
+        assert old.closed and not fresh.closed
+        await reads.close()
+
+    asyncio.run(scenario())
+
+
+class _Profiles:
+    def active_identity(self):
+        return ("profile-a", 1)
+
+    def snapshot(self, profile_id, revision):
+        return SimpleNamespace(profile_id=profile_id, has_api_key=False)
+
+    def resolve_snapshot_secret(self, profile_id, revision, secrets):
+        return None
+
+
+def test_a_language_change_keeps_a_busy_write_handle_until_its_write_ends(monkeypatch) -> None:
+    language: list[str | None] = [None]
+    opened: list[_FakeHandle] = []
+
+    def handle(profile, **kwargs):
+        opened.append(_FakeHandle(kwargs.get("language")))
+        return opened[-1]
+
+    monkeypatch.setattr(sdk_write_processor, "SdkClientHandle", handle)
+    coordinator = sdk_write_processor.SdkWriteCoordinator(
+        profiles=_Profiles(),  # type: ignore[arg-type]
+        secrets=None,  # type: ignore[arg-type]
+        data_dir=None,
+        transport_factory=lambda _profile: None,
+        sedimentation_enabled=lambda: True,
+        memory_mode=lambda: "pro",
+        sdk_language=lambda: language[0],
+    )
+
+    async def scenario():
+        async with coordinator.use_client() as client:
+            assert client.language is None
+            language[0] = "de"
+            await coordinator.retire_stale_handles()
+            # In flight: it finishes in the language it started with (#218).
+            assert not opened[0].closed
+        assert opened[0].closed
+        async with coordinator.use_client() as client:
+            assert client.language == "de"
+        language[0] = None
+        await coordinator.retire_stale_handles()
+        assert opened[1].closed
+        await coordinator.close()
+
+    asyncio.run(scenario())
+
+
+# --- the HTTP surface -----------------------------------------------------------------
+
+
+def run_app(tmp_path, monkeypatch, scenario) -> None:
+    async def main() -> None:
+        settings = Settings(
+            data_dir=tmp_path / "data",
+            source_home=tmp_path,
+            api_token=SecretStr(TOKEN),
+            imports_enabled=False,
+            automatic_memory_processing=False,
+            live_sync_enabled=False,
+        )
+        app = create_app(settings, secret_store=InMemorySecretStore())
+
+        @asynccontextmanager
+        async def write_client():
+            yield SimpleNamespace()
+
+        async with app.router.lifespan_context(app):
+            monkeypatch.setattr(app.state.sdk_write_coordinator, "use_client", write_client)
+            async with AsyncClient(
+                transport=ASGITransport(app=app),
+                base_url="http://test",
+                headers={"Authorization": f"Bearer {TOKEN}"},
+            ) as client:
+                await scenario(app, client)
+
+    asyncio.run(main())
+
+
+@pytest.mark.fresh_sdk
+def test_ui_language_api_get_put_and_status(tmp_path, monkeypatch) -> None:
+    async def scenario(app, client):
+        reads = app.state.sdk_client_handle
+        writes = app.state.sdk_write_coordinator
+        retired: list[str | None] = []
+        retire = writes.retire_stale_handles
+
+        async def counting():
+            retired.append(writes.sdk_language())
+            await retire()
+
+        monkeypatch.setattr(writes, "retire_stale_handles", counting)
+
+        current = (await client.get("/api/v1/settings/ui-language")).json()
+        assert current["ui_language"] is None and current["sdk_language"] == "auto"
+        assert current["languages"] == list(UI_LANGUAGES)
+        assert reads.current_language() is None and writes.sdk_language() is None
+
+        # zh-Hans is passed explicitly: Chinese prompts, handles rebuilt (#243).
+        body = (
+            await client.put("/api/v1/settings/ui-language", json={"ui_language": "zh-Hans"})
+        ).json()
+        assert body == {
+            **current,
+            "ui_language": "zh-Hans",
+            "sdk_language": "zh-Hans",
+            "rebuilt": True,
+        }
+        assert reads.current_language() == "zh-Hans" and writes.sdk_language() == "zh-Hans"
+        assert retired == ["zh-Hans"]
+        processing = (await client.get("/api/v1/memory-processing")).json()
+        assert processing["pipeline"]["sdk_language"] == "zh-Hans"
+
+        # The same value again changes nothing.
+        body = (
+            await client.put("/api/v1/settings/ui-language", json={"ui_language": "zh-Hans"})
+        ).json()
+        assert body["rebuilt"] is False and retired == ["zh-Hans"]
+
+        body = (await client.put("/api/v1/settings/ui-language", json={"ui_language": "ja"})).json()
+        assert body["sdk_language"] == "ja" and body["rebuilt"] is True
+        assert reads.current_language() == "ja" and writes.sdk_language() == "ja"
+        assert retired == ["zh-Hans", "ja"]
+
+        # An explicit English choice forces English prompts.
+        body = (await client.put("/api/v1/settings/ui-language", json={"ui_language": "en"})).json()
+        assert body["sdk_language"] == "en" and body["rebuilt"] is True
+
+        processing = (await client.get("/api/v1/memory-processing")).json()
+        assert processing["pipeline"]["ui_language"] == "en"
+        assert processing["pipeline"]["sdk_language"] == "en"
+
+        # Unset (CLI `settings language system`): auto again.
+        body = (await client.put("/api/v1/settings/ui-language", json={"ui_language": None})).json()
+        assert body["sdk_language"] == "auto" and body["rebuilt"] is True
+        assert reads.current_language() is None
+        saved = json.loads((tmp_path / "data" / "config.json").read_text())
+        assert saved["ui_language"] is None
+
+        for bad in ({"ui_language": "zh-CN"}, {"ui_language": "xx"}, {"language": "ja"}, {}):
+            response = await client.put("/api/v1/settings/ui-language", json=bad)
+            assert response.status_code == 422, bad
+
+    run_app(tmp_path, monkeypatch, scenario)