Merge remote-tracking branch 'origin/master' into build/windows-cache-concurrency

.agents/notes/implemented/architecture/2026-07-10-single-file-executable-sdk-runtime-distribution.i18n.yaml

@@ -2,5 +2,5 @@
 # side as of the last confirmed-consistent state. Both languages carry equal authority;
 # after editing either side, bring the other along and re-record with:
 #   pnpm run verify-translation-pairing --write .agents/notes/implemented/architecture/2026-07-10-single-file-executable-sdk-runtime-distribution.md
-2026-07-10-single-file-executable-sdk-runtime-distribution.md: 56c9770966647e97763e0eaf339e4589fba673fb
-2026-07-10-single-file-executable-sdk-runtime-distribution.zh.md: 04351105a56304020f5696cf1ce82d7a83ed2ced
+2026-07-10-single-file-executable-sdk-runtime-distribution.md: ff00327c388b0468e5e98d488141aa35eb40d104
+2026-07-10-single-file-executable-sdk-runtime-distribution.zh.md: 3f7f18a9907b2f43f7cd8467f054f0d0bfcef14a

.agents/notes/implemented/architecture/2026-07-10-single-file-executable-sdk-runtime-distribution.md

@@ -23,6 +23,8 @@ The exe is packaged with the **`--sea` (enhanced SEA) mode** of [@yao-pkg/pkg](h
 
 `@yao-pkg/pkg` is an exact-pinned root `devDependency` invoked as `pnpm exec pkg`, with [`patches/@[email protected]`](../../../../patches/@[email protected]) removing the SEA bootstrap's `patchChildProcess` call. Unpatched, pkg rewrites spawned commands named `node` — including the string after a `-c`/`/c` flag, exactly the Bash tool's `bash -c` form — to the executable itself and stamps `PKG_EXECPATH` into every child environment, so a model-issued `node --version` silently boots the dsh CLI; Node's own SEA layer performs no such rewrite, and a SEA binary cannot impersonate plain Node because it always boots its embedded app. With the call removed, children resolve `node` through PATH like any other process (a machine without Node reports command-not-found honestly), no `PKG_EXECPATH` reaches children, absolute `process.execPath` spawns still re-enter the app, worker threads never applied the hook, and `process.pkg` sidecar selection is untouched.
 
+The same patch makes the SEA bootstrap's native-addon extraction atomic. On the first `dlopen` of an addon inside the VFS, pkg's `patchDlopen` copies the addon's package tree to `$PKG_NATIVE_CACHE_PATH/pkg/<sha256 of the .node file>/` (default `~/.cache/pkg/...`), a per-user directory that every concurrent process of the same executable shares; upstream writes each file straight to its final path with `writeFileSync`, which truncates a file another process may already have mapped and lets that process's `existsSync`/hash check read a half-written file. Concurrent first starts therefore die with SIGBUS on Linux or fail with `ERR_DLOPEN_FAILED: Library not loaded` on sharp's libvips on macOS (#4664). The patch routes the three write sites through a same-directory temporary file and `renameSync`, so a cache path is either absent or complete, every process finishes its own copy pass before it loads, and concurrent renames of identical content need no lock. The cache location, hash keying, and per-file comparison are unchanged, so a consumer that isolates the cache per instance through `PKG_NATIVE_CACHE_PATH` keeps working; worker threads only define the hook and never install it. Measured (linux-x64, node24 target, pkg 6.21.0, a probe that loads sharp with its 18 MB libvips library, 16 concurrent first starts against one empty cache, five rounds): 39 of 80 processes died with SIGBUS before the change and 0 of 80 after it, with no temporary files left behind.
+
 Terminology reminder: pkg's `/snapshot` VFS has nothing to do with this repo's testing-system "snapshot" (ACP replay expected outputs, `$DSH_SNAPSHOT`); this document says "VFS" for the former.
 
 ### The serving interface is a plugin inside the dsh application

.agents/notes/implemented/architecture/2026-07-10-single-file-executable-sdk-runtime-distribution.zh.md

@@ -23,6 +23,8 @@ exe 使用 [@yao-pkg/pkg](https://github.com/yao-pkg/pkg)（vercel/pkg 归档后
 
 `@yao-pkg/pkg` 是精确钉版的根 `devDependency`，经 `pnpm exec pkg` 调用，并以 [`patches/@[email protected]`](../../../../patches/@[email protected]) 移除 SEA bootstrap 中的 `patchChildProcess` 调用。未打补丁时，pkg 会把 spawn 的 `node` 命令——包括 `-c`/`/c` 标志后的命令串，恰是 Bash 工具的 `bash -c` 形态——改写为 exe 自身，并向每个子进程环境注入 `PKG_EXECPATH`，模型下发的 `node --version` 会静默启动 dsh CLI；Node 自身的 SEA 层没有这种改写，且 SEA 二进制永远启动内嵌应用、无法充当纯 Node。移除该调用后，子进程像普通进程一样经 PATH 解析 `node`（无 Node 的机器如实报 command not found），子进程环境不再出现 `PKG_EXECPATH`，以 `process.execPath` 绝对路径 spawn 的重入不受影响，worker 线程本来就未应用该钩子，`process.pkg` 侧车选择也不受影响。
 
+同一补丁还把 SEA bootstrap 的原生插件解包改成原子写入。VFS 内的插件首次 `dlopen` 时，pkg 的 `patchDlopen` 会把该插件所在的包目录整棵拷到 `$PKG_NATIVE_CACHE_PATH/pkg/<.node 文件的 sha256>/`（默认 `~/.cache/pkg/...`），这是同一个 exe 的所有并发进程共用的按用户目录；上游用 `writeFileSync` 直接写目标路径，会把另一个进程可能已经映射的文件截断，并让该进程的 `existsSync`/哈希比对读到写了一半的文件。因此并发首次启动在 Linux 上以 SIGBUS 崩溃，在 macOS 上对 sharp 的 libvips 报 `ERR_DLOPEN_FAILED: Library not loaded`（#4664）。补丁让三处写入都经过同目录临时文件加 `renameSync`，于是缓存路径要么不存在、要么完整，每个进程都在加载前走完自己的拷贝，相同内容的并发 rename 不需要锁。缓存位置、哈希键与逐文件比对均未改变，通过 `PKG_NATIVE_CACHE_PATH` 按实例隔离缓存的消费方照常工作；worker 线程只定义该钩子而从不安装。 实测（linux-x64、node24 构建目标、pkg 6.21.0，一个加载 sharp 及其 18 MB libvips 库的探针，16 个进程对同一个空缓存并发首次启动，跑五轮）：改动前 80 个进程中 39 个以 SIGBUS 崩溃，改动后 80 个全部正常，且无残留临时文件。
+
 术语提醒：pkg 的 `/snapshot` VFS 与本仓库测试体系的「快照」（ACP（Agent Client Protocol）回放预期输出、`$DSH_SNAPSHOT`）无关，本文用「VFS」指前者。
 
 ### 对外服务接口是 dsh 应用中的插件

.agents/notes/implemented/architecture/2026-07-25-web-client-session-scope-and-provide-channel.i18n.yaml

@@ -2,5 +2,5 @@
 # side as of the last confirmed-consistent state. Both languages carry equal authority;
 # after editing either side, bring the other along and re-record with:
 #   pnpm run verify-translation-pairing --write .agents/notes/implemented/architecture/2026-07-25-web-client-session-scope-and-provide-channel.md
-2026-07-25-web-client-session-scope-and-provide-channel.md: 990a9b6eef862a7ac4a549358beae7f9081eaa0b
-2026-07-25-web-client-session-scope-and-provide-channel.zh.md: 5c90611fab36611766bb407138c4f0c8a6b3a01b
+2026-07-25-web-client-session-scope-and-provide-channel.md: 32be87f3a0a4f8da92100ec7351af788862532f7
+2026-07-25-web-client-session-scope-and-provide-channel.zh.md: b2e7efae98efb69d5f34d6719a382221ffc7a00d

.agents/notes/implemented/architecture/2026-07-25-web-client-session-scope-and-provide-channel.md

@@ -28,7 +28,7 @@ Host-side `session.create(workspaceId)` produces Session + Agent + cwd in one pi
 - Session identity is the host's true form from birth: the sessionId arrives via the `session.create` response / the `host/session-added` frame, and every client-side address (the scope tag, slot store keys, RPC addressing) uses that same id.
 - The materialization moment = the instant the user picks a Workspace (cwd settled): the client calls `session.create({workspaceId})` on the spot and receives the complete entity.
 - "New Session with no workspace picked" is a **pure view state** (a navigation position) corresponding to no session/scope entity; until the pick, the composer is locked whole (no slash, no plain text).
-- A "blank session" is just an ordinary materialized session whose log is still empty; to every Agent-scope plugin on the host (goal/plan/skill/…) it is indistinguishable from any session, so slash/plan are all naturally live.
+- A "blank session" is an ordinary materialized session with no turn yet; to Agent-scope plugins on the host (goal/plan/skill/…) it remains an ordinary Session, so slash/plan are naturally live.
 
 ### Agent scope: the actx is the sole session carrier in the client-side cordis world
 
@@ -63,14 +63,14 @@ Session instances share the scope's lifecycle, while the catalog reports discove
 
 A session "materialized but with no first prompt" is governed by the summary-derived bit `blank` (a derived column, not a header field; SessionHeader stays immutable):
 
-- The Host criterion is absence of `turn/start`; slash-command and configuration events do not clear `blank`. Live summaries use the Session projection. Cold summaries use cached metadata, leaving cache misses visible as unknown. Reuse acquires the writer under [blank Session acquisition](2026-09-17-process-local-blank-sessions.md).
+- The Host criterion is absence of `turn/start`: the `sessionListMetadata.blank` projection starts true and only that event clears it, so slash-command, configuration, and creation-checkpoint events leave it true even after they reach disk — blank does not mean unpersisted. Missing metadata falls back to `session.seq === 0` for live Sessions and false for cold ones; cold summaries otherwise read cached metadata, leaving cache misses visible as unknown. Reuse acquires the writer under [blank Session acquisition](2026-09-17-process-local-blank-sessions.md).
 - The wire carries it in two places: the required `SessionSummary.blank` column, and the required `blank` field on the `host/session-added` frame (always true at creation, letting other tabs enter the same blank-session state into their mirrors).
-- The client mirror only lowers, never raises (monotonic), flipped from three sources, all reusing existing wire signals:
-  - The sender's own tab: the **successful response** to the first `prompt()` flips false (acceptance proves the user/message is already in the host log — this flip is confirmation, not optimism; `onEngaged` synchronously updates the list mirror, converting the current `New Session` row in place to an ordinary title, adding no list row). A rejected first prompt keeps the session blank: aligned with host authority, still shown as `New Session`, keeping its connectWorkspace reuse eligibility while it remains a Workspace member.
-  - Other tabs: the `host/session-status (running:true)` frame flips it — a blank session never runs, so the first running necessarily means no longer blank;
-  - Reconnect alignment: `session.list`'s summary.blank is authoritative, so a tab that missed frames aligns naturally on its next pull; a stale blank:true can never mark a converted session back to blank.
+- Client display also reflects accepted/running observations, whose retention the [blank rollback decision](../bug-fix/2026-09-15-client-session-blank-reconciliation.md) owns:
+  - The sender's own tab: the **successful response** to the first `prompt()` converts the current `New Session` row in place, adding no list row — acceptance is display memory, not proof that a turn or user message reached durable history. A rejected first prompt keeps the session blank: aligned with host authority, still shown as `New Session`, keeping its connectWorkspace reuse eligibility while it remains a Workspace member.
+  - Other tabs: the `host/session-status (running:true)` frame converts it — a blank session never runs, so the first running necessarily means no longer blank;
+  - Reconnect alignment: a list pull updates Host summaries while the Manager keeps those observations, and a `sessionListMetadata` hint of existing history prevents re-blanking on top of that; an empty-history response cannot mark a converted session back to blank.
 - List discipline: the store retains every row; the Workspace browser's grouping, flat view, search, and counts share one visible projection — every non-blank session shows, while blank sessions show only the row retained by the `mainView` source, with its title forced to `New Session`. After a Workspace switch, the old blank entity stays in the mirror but is hidden from the list while the target Workspace's main blank shows; the user-visible surface therefore holds at most one blank row globally.
-- Blank Sessions can persist through creation checkpoints and command events. Browser reloads and Host restarts reuse eligible blanks after acquiring their writer; occupied blanks are skipped. Old logs remain on disk without automatic cleanup.
+- Blank Sessions can persist through creation checkpoints and command events, and have no automatic garbage collection: browser reloads, Host restarts, and Workspace connections reuse eligible blanks after acquiring their writer and skip occupied candidates, while list-loading and multi-tab races can still create additional blank Sessions, whose old logs remain on disk.
 
 ### connectWorkspace: the sole entry point of New Session
 
@@ -129,12 +129,13 @@ Blank Sessions retain the header's leading and corner slots so navigation contro
 | Components receiving wiring-callback bundles (two-layer inject→props pass-down) | The standard-kit channel lets components fetch their own; the public API converges to hooks + stable props |
 | Swapping the no-session Hero view for the entire session Conversation | Even with the outer layout unchanged, the Hero, picker, and composer subtrees would remount together, making the whole UI region jump |
 | Making InputBar itself `session-maybe` | The input state machine, keyboard command surface, and actions would all have to accept absent values; replacing only the disabled input body keeps optionality at the shell boundary |
-| A dedicated conversion frame | `session-status(running:true)` semantically implies conversion (a blank session never runs); adding a frame buys zero information for one more wire type |
+| A dedicated conversion frame | Existing acceptance and running signals provide the observations used by the display rule; a new frame is unnecessary for that rule |
 
 ## Consequences
 
 - Plugins gain session context isomorphic to the host's: per-session state hangs on the actx and mounts/tears down in one piece with the scope fiber, making leaks structurally impossible; two-session isolation is structurally guaranteed by the scope filter.
 - The client object layer converges to a wire mirror: session identity, lifecycle, and capability adjudication all defer to the host entity — the input system (the next layer) always faces a session with a real Agent, and providers like slash/skill uniformly address by sessionId directly.
-- Blank-session governance takes zero dedicated mechanisms: state rides one derived bit, visibility rides the unified list projection (only the current blank shows, as `New Session`), reuse acquires the persisted writer, and the ordinary ceiling rides same-Workspace reuse.
+- Blank-session governance takes zero dedicated mechanisms: state rides one derived bit, visibility rides the unified list projection (only the current blank shows, as `New Session`), reuse acquires the persisted writer, and the ordinary ceiling rides same-Workspace reuse. The accepted/running display memory that guards the conversion is Client-local.
+
 - The cost: the id→ctx handoff discipline and provide's Concurrent discipline are conventions rather than type-enforced, pinned by review and tests. The single state axis still withholds machine faces until a Session exists; the [resident conversation shell](../../../../packages/client/ui-conversation/README.md) routes activation to the Workspace picker during that interval.
 - Known gaps: approval/question recovery across prune (TODO); model selection returns in live-mutation shape (the host `selectModel` trio is ready-made, its client consumer not yet built).

.agents/notes/implemented/architecture/2026-07-25-web-client-session-scope-and-provide-channel.zh.md

@@ -28,7 +28,7 @@ host 侧 `session.create(workspaceId)` 一体产出 Session + Agent + cwd（作
 - 会话身份自出生即为 host 真身：sessionId 由 `session.create` 响应 / `host/session-added` 帧带来，client 侧一切寻址（scope tag、slot store 键、RPC 地址）用的都是同一个 id。
 - 实体化时点 = 用户选定 Workspace（cwd 确定）的瞬间：client 当场调 `session.create({workspaceId})`，拿到完整实体。
 - 「New Session 且未选 workspace」是**纯视图态**（一个导航位置），不对应任何会话/scope 实体；选定之前 composer 整体锁死（无 slash、无纯文本）。
-- 「空会话」就是一个日志还空着的普通实体化会话；对 host 上所有 Agent-scope 插件（goal/plan/skill（技能）/…）它与任何会话无异，slash/plan 天然全活。
+- 「空会话」是尚无轮次的普通实体化会话；对 host 上的 Agent-scope 插件（goal/plan/skill（技能）/…）而言，它仍是普通 Session，因此 slash/plan 自然可用。
 
 ### Agent scope：actx 是 client 侧 cordis 世界的唯一会话载体
 
@@ -63,14 +63,14 @@ Session 实例与 scope 同生命周期；catalog 只报告可发现性，不持
 
 「实体化但无首条提示词」的会话经 summary 派生位 `blank` 治理（派生列而非 header 字段，SessionHeader 保持不可变）：
 
-- Host 判据是没有 `turn/start`；slash 命令与配置事件不会清除 `blank`。Live summary 使用 Session 投影。Cold summary 使用缓存元数据，缓存缺失时以未知状态保留在列表中。复用按[空白 Session 获取](2026-09-17-process-local-blank-sessions.zh.md)规则取得写锁。
+- Host 判据是没有 `turn/start`：`sessionListMetadata.blank` 投影初始为 true，且只有该事件会清除它，因此 slash 命令、配置事件与创建检查点即使已落盘也不会清除——blank 不代表未持久化。metadata 缺失时，live Session 回退到 `session.seq === 0`，cold Session 回退到 false；cold summary 其余情况读缓存元数据，缓存缺失时以未知状态保留在列表中。复用按[空白 Session 获取](2026-09-17-process-local-blank-sessions.zh.md)规则取得写锁。
 - wire 承载两处：`SessionSummary.blank` 必填列；`host/session-added` 帧必填 `blank` 字段（创建时恒 true，供别的 tab 按同一空会话状态入镜像）。
-- client 镜像只降不升（单调），三来源翻转，全部复用既有 wire 信号：
-  - 发送方本地：首次 `prompt()` 的**成功响应**翻 false（受理即证明用户消息已入 host 日志——此点翻转是确证而非乐观；`onEngaged` 同步更新列表镜像，当前 `New Session` 行原地转为普通标题，不新增列表行）。首条提示词被拒则会话保持 blank：与 host 权威对齐、继续显示为 `New Session`、在仍为该工作区成员时保持 connectWorkspace 复用资格。
-  - 其他端：`host/session-status (running:true)` 帧翻转——blank 会话从不 running，首次 running 必然已非 blank；
-  - 重连对齐：`session.list` 的 summary.blank 是权威，错过帧的端下次拉取自然对齐；陈旧的 blank:true 不能把已转正的会话重新标回 blank。
+- 客户端展示还受已观察到的受理/运行影响，其保留期限由 [blank 回退修复决策](../bug-fix/2026-09-15-client-session-blank-reconciliation.zh.md) 拥有：
+  - 发送方本地：首次 `prompt()` 的**成功响应**把当前 `New Session` 行原地转正，不新增列表行——受理是展示记忆，不证明轮次或用户消息已写入持久历史。首条提示词被拒则会话保持 blank：与 host 权威对齐、继续显示为 `New Session`、在仍为该工作区成员时保持 connectWorkspace 复用资格。
+  - 其他端：`host/session-status (running:true)` 帧转正——blank 会话从不 running，首次 running 必然已非 blank；
+  - 重连对齐：列表拉取更新 Host 摘要，Manager 则保留这些观察；在此基础上，`sessionListMetadata` 提示已有历史也会阻止回退 blank，因此空历史响应不能把已转正的会话标回 blank。
 - 列表纪律：store 保留全部行；Workspace browser 的分组、平铺、搜索和计数共用同一可见投影——所有非 blank 会话都显示，blank 会话只显示由 `mainView` 来源持有的一行，并强制标题为 `New Session`。切换 Workspace 后，旧 blank 实体仍在镜像中但从列表隐藏，目标 Workspace 的主 blank 显示；因此用户可见面全局至多一条 blank 行。
-- 空白 Session 可以通过创建检查点与命令事件持久化。浏览器刷新与 Host 重启会在取得写锁后复用符合条件的空白会话，并跳过被占用的候选。旧日志保留在磁盘上，不自动清理。
+- blank Session 可以通过创建检查点与命令事件持久化，且没有自动垃圾回收：浏览器刷新、Host 重启与工作区连接会在取得写锁后复用符合条件的空白会话并跳过被占用的候选；但列表加载与多 tab 竞态仍可能创建额外的 blank Session，其旧日志保留在磁盘上。
 
 ### connectWorkspace：New Session 的唯一入口
 
@@ -129,12 +129,13 @@ blank Session 保留 header 的 leading 与 corner slot，让右侧栏展开入
 | 组件收 wiring 回调包（inject→props 两层下传） | 标准件通道让组件自取；公共 API 收敛为 hooks + 稳定 props |
 | Hero 无会话视图与会话 Conversation 整支互换 | 即使外层 layout 不变，Hero、picker 与 composer 子树仍会一起重建，界面产生整块抖动 |
 | 让 InputBar 自身变成 `session-maybe` | 输入状态机、键盘命令面与动作都被迫接受缺省值；只替换 disabled 输入体能把可选性留在外壳边界 |
-| 专用「转正」帧 | `session-status(running:true)` 语义蕴含转正（blank 会话从不 running），加帧是 wire 多一型换零信息 |
+| 专用「转正」帧 | 既有受理和运行信号已经提供展示规则所需的观察；该规则不需要新增帧 |
 
 ## 后果
 
 - 插件获得与 host 同构的会话上下文：逐会话状态挂 actx、随 scope fiber 一次拆装，泄漏结构性不可能；双会话隔离由 scope filter 结构性保证。
 - client 对象层收敛为 wire 镜像：会话身份、生命周期、能力判别全部以 host 实体为准——输入体系（下一层）面对的永远是「有真 Agent 的会话」，slash/skill 等提供方一律以 sessionId 直接寻址。
-- 空会话治理零专用机制：状态靠一个派生位，可见性靠统一列表投影（仅 current blank 以 `New Session` 展示），复用时获取持久化写锁，常规上限靠同 Workspace 复用。
+- 空会话治理零专用机制：状态靠一个派生位，可见性靠统一列表投影（仅 current blank 以 `New Session` 展示），复用时获取持久化写锁，常规上限靠同 Workspace 复用。转正所依赖的受理/运行展示记忆仅保留在客户端。
+
 - 代价：id→ctx 换乘纪律、provide 的 Concurrent 纪律都是约定而非类型强制，靠 review 与测试钉住。单一状态轴仍会在 Session 存在前隐藏 machine face；这段时间内，[常驻会话壳](../../../../packages/client/ui-conversation/README.zh.md)会把激活操作转到 Workspace picker。
 - 已知欠账：approval/question 跨 prune 恢复（TODO）；模型选择以 live-mutation 形状回归（host `selectModel` 三件套现成，其 client 消费方尚未构建）。

.agents/notes/implemented/bug-fix/2026-09-15-client-session-blank-reconciliation.i18n.yaml

@@ -0,0 +1,6 @@
+# Bilingual-pair consistency record (docs/i18n/README.md): the git blob hash of each
+# side as of the last confirmed-consistent state. Both languages carry equal authority;
+# after editing either side, bring the other along and re-record with:
+#   pnpm run verify-translation-pairing --write .agents/notes/implemented/bug-fix/2026-09-15-client-session-blank-reconciliation.md
+2026-09-15-client-session-blank-reconciliation.md: 7213636e32702c4c51887adba3da019f49b8703c
+2026-09-15-client-session-blank-reconciliation.zh.md: 4b50340fea668b6d850c1d00787dda3874b61e0c

.agents/notes/implemented/bug-fix/2026-09-15-client-session-blank-reconciliation.md

@@ -0,0 +1,43 @@
+# Agent Note: Keep accepted Session presentation across list refreshes
+
+Status: implemented
+
+English | [中文](2026-09-15-client-session-blank-reconciliation.zh.md)
+
+## Problem
+
+A successful prompt response converts the Client's `New Session` row before a turn necessarily starts. A later `session.list` response can still report `blank: true` and undo that conversion. Reconnect triggers the same refresh. Keeping the conversion only inside a Session object also loses it when that object is replaced.
+
+## Decision
+
+The [Manager](../../../../packages/api/session-controller/src/client/sessions/manager.ts) retains accepted/running observations in a private set keyed by Session id. List rows and the existing Session blank updates use `summary.blank && !engagedSessions.has(sessionId)`, with `sessionListMetadata` hints still applied on top. The existing summary mutations, Session snapshot fields, constructor, and projection stores retain their responsibilities.
+
+Every successful prompt response invokes the existing `onEngaged` callback, including from a replaced Session object. The Manager updates its retained observation, the list row, and the currently resident Session by id. Rejection records no engagement. A `running: true` status, addition, or list baseline also records engagement; a baseline predating removal cannot restore that observation, even if the row is re-added during the pull.
+
+The observation survives refresh, reconnect, and object replacement. Removal, drop, and successful list refresh forget it only when no list row, Session object, or child address retains the identity. Refresh evaluates retention after replaying in-flight mutations; failed and superseded pulls do not prune observations. Late acceptance cannot recreate a removed row or a Session object. Manager disposal clears the set and prevents late acceptance and outstanding list responses from publishing.
+
+Engagement is display memory, not proof that a turn started, work remains queued, or a message reached durable storage. It is not persisted across page reload. Historical `sessionListMetadata.blank` and the Host summary defaults are unchanged.
+
+## Alternatives considered
+
+**Preserve every previously false summary bit.** A previous Host summary is not evidence of local acceptance or running. Making all false values permanent would also suppress later Host corrections without either observation.
+
+**Introduce a shared Session record.** Combining this memory with projection stores requires constructor and cache-lifetime changes. Those changes are independent of preventing a blank rollback and are excluded.
+
+**Wait for history before converting the row.** This changes the existing acceptance-time display rule and is a separate UI decision.
+
+## Consequences
+
+Accepted or observed-running Sessions retain their existing display conversion, including when accepted input never starts a turn. Drafts, submission-error recovery, sidebar filtering and title rules, creation/reuse, UUIDs, Host protocol, persistence, and projection-cache lifetimes are unchanged. Reverting this Client-only fix needs no data migration.
+
+The Manager owns one additional per-id display flag. It does not replace Session-local presentation fields or implement a history/draft/presentation redesign.
+
+For an identity with neither subagent origin nor a retained child address, a removal notification discards its projection store unless that store already carries a non-empty `subagentCatalog`; a retained Session object keeps the store it was constructed with — for example a current row removed while its Session is still staged. If its projection store was discarded and that identity returns to the list before its Session object is dropped, the Manager creates and seeds a second store that the resident object never reads, so list rows and that object's projection readers can disagree until a replacement instance adopts the current store. Repairing that projection ownership is deferred to its own change; blank display does not depend on it.
+
+## Verification
+
+Manager tests cover refresh without a turn, running-to-idle updates, object replacement, late acceptance, removal through notifications or list reconciliation, retained instances and child addresses, failed and superseded pulls, and disposal. They check both list and Session state where an instance exists. Session tests retain first-send rejection and later-send behavior. Browser verification uses the recorded first-turn scenario with acceptance held before `turn/start` and a same-page reconnect. A timestamp substituted only in the reconnect list response provides a visible synchronization marker; the Host's blank/running values and durable log remain unchanged.
+
+## Related decisions
+
+The [scope and provisioning decision](../architecture/2026-07-25-web-client-session-scope-and-provide-channel.md) owns Session scope, creation/reuse, and the visible blank row. The [Session/Conversation ownership decision](../architecture/2026-08-20-client-session-conversation-ownership.md) owns transport, assembly, and snapshot contents.

.agents/notes/implemented/bug-fix/2026-09-15-client-session-blank-reconciliation.zh.md

@@ -0,0 +1,43 @@
+# Agent Note: 在列表刷新后保留已受理会话的展示状态
+
+Status: implemented
+
+[English](2026-09-15-client-session-blank-reconciliation.md) | 中文
+
+## 问题
+
+提示词请求成功后，客户端会把 `New Session` 行转换为普通会话，但此时轮次不一定已经开始。后续 `session.list` 响应仍可能返回 `blank: true`，从而撤销该转换。重连会触发同样的刷新。若只在 Session 对象内保留转换状态，对象被替换时也会丢失。
+
+## 决策
+
+[Manager](../../../../packages/api/session-controller/src/client/sessions/manager.ts) 使用按 Session id 索引的私有集合，保留已观察到的受理/运行。列表行与既有 Session blank 更新使用 `summary.blank && !engagedSessions.has(sessionId)`，其上仍叠加 `sessionListMetadata` 提示。既有摘要变更、Session 快照字段、构造函数和投影存储保留原有职责。
+
+每个成功的提示词响应都会调用既有 `onEngaged` 回调，包括来自已被替换的 Session 对象的响应。Manager 按 id 更新其保留的观察、列表行和当前驻留 Session。拒绝不会记录受理/运行。`running: true` 状态、添加事件或列表基线也会记录运行；早于移除的基线不能恢复该观察，即使该行在拉取期间重新加入。
+
+该观察跨刷新、重连和对象替换保留。移除、drop 和成功的列表刷新仅在列表行、Session 对象及子会话地址均不再保留该身份时清除它。刷新在重放请求期间的变更后判断保留资格；失败及被替代的请求不会清理观察。迟到的受理不能重建已移除的行或 Session 对象。Manager 销毁会清空集合，并阻止迟到的受理和未完成的列表响应发布。
+
+受理/运行是展示记忆，不证明轮次已经开始、工作仍在排队，或消息已经写入持久存储。它不会跨页面重载持久化。历史 `sessionListMetadata.blank` 与 Host 摘要默认值保持不变。
+
+## 考虑过的替代方案
+
+**保留所有曾为 false 的摘要位。** 先前的 Host 摘要不能证明客户端观察过受理或运行。将所有 false 永久保留，也会在两种观察均不存在时阻止后续 Host 校正。
+
+**引入共享 Session 记录。** 将这份记忆与投影存储合并，需要修改构造参数及缓存生命周期。这些改动独立于防止 blank 回退，因此不纳入。
+
+**等待历史后再转换行。** 这会改变现有的受理时展示规则，属于独立的 UI 决策。
+
+## 后果
+
+已受理或观察过运行的 Session 保持既有展示转换，包括已受理输入始终没有开始轮次的情况。草稿、发送错误恢复、侧边栏筛选与标题规则、创建/复用、UUID、Host 协议、持久化及投影缓存生命周期保持不变。回退这项纯客户端修复不需要数据迁移。
+
+Manager 额外维护一个按 id 保存的展示标记。它不替代 Session 本地展示字段，也不实施历史/草稿/展示状态重构。
+
+对于来源不是 subagent、也没有保留子会话地址的身份，移除通知会丢弃它的投影存储——除非该存储已带有非空的 `subagentCatalog`；而仍被保留的 Session 对象继续持有构造时采用的存储，例如当前行被移除而它的 Session 仍留在舞台上。若投影存储已被丢弃，且该身份在其 Session 对象被销毁前回到列表，Manager 会新建并写入第二个存储，而常驻对象从不读取它，因此在替换实例采用当前存储之前，列表行与该对象的投影读取方可能不一致。该投影归属的修复延期到独立的改动；blank 展示不依赖它。
+
+## 验证
+
+Manager 测试覆盖无轮次刷新、运行转空闲、对象替换、迟到受理、通过通知或列表对账移除、保留实例与子会话地址、失败及被替代的请求，以及销毁。在存在实例的场景中，测试同时检查列表和 Session 状态。Session 测试保留首发拒绝及后续发送行为。浏览器验证使用已有首轮录制场景，在受理后、`turn/start` 前暂停并进行同页重连。测试仅替换重连列表响应中的时间戳，用其显示结果作为同步标记；Host 的 blank/running 值及持久日志保持不变。
+
+## 相关决策
+
+[作用域与供给决策](../architecture/2026-07-25-web-client-session-scope-and-provide-channel.zh.md) 拥有 Session 作用域、创建/复用及可见 blank 行。[Session/Conversation 归属决策](../architecture/2026-08-20-client-session-conversation-ownership.zh.md) 拥有传输、装配及快照内容。

apps/web/tests/replay-round-trip.e2e.ts

@@ -4,20 +4,26 @@
 // or the live adapter (record). Drive steps run in every mode and wait only
 // on generic completion (whenTurnSettled — never model-content selectors, so
 // record cannot hang on a live model answering differently); assertion steps
-// run in replay/refresh only. Settled states only — streaming fidelity is
-// asserted from the durable embedded Assistant stream, not transient DOM.
+// run in replay/refresh only. Streaming fidelity is asserted from the durable
+// embedded Assistant stream, not transient DOM.
 // Record: DSH_SNAPSHOT=record writes session.v3.jsonl, then a keyless
 // DSH_SNAPSHOT=refresh regenerates ui.expected.md.
+// Suite setup (beforeAll, not per step): one fixed page clock
+// (page.clock.setFixedTime) and one routed Remote mux socket
+// (page.routeWebSocket) serve every step below, so the reconnect checkpoints
+// rely on both without re-pinning or re-routing them.
 import { readFile } from 'node:fs/promises'
 import { join } from 'node:path'
 import { fileURLToPath } from 'node:url'
-import type { Browser, Page } from 'playwright'
+import type { Browser, Page, Route, WebSocketRoute } from 'playwright'
 import { chromium } from 'playwright'
 import { afterAll, beforeAll, describe, expect, it, onTestFailed } from 'vitest'
 import { ToolCallId, expandAssistantStream } from '@deepseek-ai/dsh-llm'
 import type { Session, SessionEvent, SessionId } from '@deepseek-ai/dsh-session'
+import type { SessionListValue } from '@deepseek-ai/dsh-api-session-controller/types'
+import type { RemoteResult } from '@deepseek-ai/dsh-typert-protocol'
 import {
-  assertFixtureInventory, captureExpandedTurnProcessAria, captureStableAria,
+  acknowledgeReloadConnectionLoss, assertFixtureInventory, captureExpandedTurnProcessAria, captureStableAria,
   compareOrRefreshGolden, fixtureUserPrompts,
   launchWebScaffold, recordFixture, watchConsole, webSnapshotMode, type WebScaffold,
 } from './scaffold.ts'
@@ -29,6 +35,7 @@ const SNAPSHOT_DIR = fileURLToPath(new URL('../../../snapshots/web/fresh-round-t
 const FIXTURE = fileURLToPath(new URL('../../../snapshots/web/fresh-round-trip/session.v3.jsonl', import.meta.url))
 const UI_EXPECTED = fileURLToPath(new URL('../../../snapshots/web/fresh-round-trip/ui.expected.md', import.meta.url))
 const ECHO_EXPECTED = fileURLToPath(new URL('../../../snapshots/web/fresh-round-trip/submission-echo.expected.md', import.meta.url))
+const ACCEPTED_RECONNECT_EXPECTED = join(SNAPSHOT_DIR, 'accepted-reconnect.expected.md')
 const BLANK_EXPECTED = join(SNAPSHOT_DIR, 'blank-reload.expected.md')
 const UI_EXPANDED_EXPECTED = fileURLToPath(
   new URL('../../../snapshots/web/fresh-round-trip/ui-expanded.expected.md', import.meta.url),
@@ -41,6 +48,8 @@ const MODE = webSnapshotMode()
 // drift apart.
 const PROMPT = 'Use the bash tool to run exactly: echo WEB_E2E_OK. Then reply with the single word DONE and stop.'
 
+type SessionListResponse = { result: RemoteResult<SessionListValue> }
+
 /** Rendered text of the system prompt surface node, or undefined when the surface carries none. */
 function systemPromptText(session: Session): string | undefined {
   const message = session.deriveMessages().find(candidate => candidate.role === 'system')
@@ -53,7 +62,9 @@ describe('web e2e: fresh round trip through the real assembly', () => {
   let page: Page
   let tripwire: ReturnType<typeof watchConsole>
   let settledSessionId: SessionId | undefined
+  let remoteSocket: WebSocketRoute | undefined
   const sessionEvents: SessionEvent[] = []
+  const browserNow = Date.now()
 
   beforeAll(async () => {
     scaffold = await launchWebScaffold({
@@ -63,6 +74,11 @@ describe('web e2e: fresh round trip through the real assembly', () => {
     scaffold.ctx.on('session/event', (_session, event: SessionEvent) => { sessionEvents.push(event) })
     browser = await chromium.launch()
     page = await newEnglishPage(browser)
+    await page.clock.setFixedTime(browserNow)
+    await page.routeWebSocket('**/api/remote.mux', (route) => {
+      remoteSocket = route
+      route.connectToServer()
+    })
     tripwire = watchConsole(page)
     await page.goto(scaffold.authenticatedUrl, { waitUntil: 'load' })
     await page.waitForSelector('[class*="frame"]', { timeout: 30_000 })
@@ -94,26 +110,104 @@ describe('web e2e: fresh round trip through the real assembly', () => {
     }
     const input = page.locator('[data-composer-input]').first()
     await input.waitFor({ timeout: 10_000 })
-    // Arm the host-side settled barrier BEFORE the send click.
-    const settled = scaffold.whenTurnSettled()
-    await input.fill(PROMPT)
-    const echoSnapshot = await input.evaluate(async (element, prompt) => {
-      element.dispatchEvent(new KeyboardEvent('keydown', {
-        key: 'Enter', code: 'Enter', bubbles: true, cancelable: true,
-      }))
-      // sendSession registered its paint yield first. This frame observes the
-      // committed echo while admission remains queued on the following task.
-      await new Promise<void>((resolve) => { requestAnimationFrame(() => { resolve() }) })
-      const echo = document.querySelector<HTMLElement>('[data-submission-echo]')
-      return [
-        `echo: ${echo?.textContent?.includes(prompt) === true ? prompt : '(missing)'}`,
-        `composer: ${JSON.stringify(element.textContent ?? '')}`,
-        `contenteditable: ${element.getAttribute('contenteditable')}`,
-      ].join('\n')
-    }, PROMPT)
-    await compareOrRefreshGolden(ECHO_EXPECTED, echoSnapshot, MODE)
-    const sessionId = await settled
-    settledSessionId = sessionId
+    const sessionId = await page.evaluate(() => {
+      const selected = JSON.parse(localStorage.getItem('dsh.sessions.current')!) as { sessionId: string }
+      return selected.sessionId
+    }) as SessionId
+    const agent = scaffold.ctx.agents.get(sessionId)
+    if (agent === undefined) throw new Error('the selected Web Session has no live Agent')
+    await agent.whenIdle()
+    const release = Promise.withResolvers<undefined>()
+    // Maintenance leaves status idle and accepts inbox input without starting a turn.
+    const maintenance = agent.runMaintenance(() => release.promise)
+    let accepted = false
+    try {
+      await input.fill(PROMPT)
+      const admitted = page.waitForResponse('**/api/session/prompt')
+      const [echoSnapshot, response] = await Promise.all([
+        input.evaluate(async (element, prompt) => {
+          element.dispatchEvent(new KeyboardEvent('keydown', {
+            key: 'Enter', code: 'Enter', bubbles: true, cancelable: true,
+          }))
+          // sendSession registered its paint yield first. This frame observes the
+          // committed echo while admission remains queued on the following task.
+          await new Promise<void>((resolve) => { requestAnimationFrame(() => { resolve() }) })
+          const echo = document.querySelector<HTMLElement>('[data-submission-echo]')
+          return [
+            `echo: ${echo?.textContent?.includes(prompt) === true ? prompt : '(missing)'}`,
+            `composer: ${JSON.stringify(element.textContent ?? '')}`,
+            `contenteditable: ${element.getAttribute('contenteditable')}`,
+          ].join('\n')
+        }, PROMPT),
+        admitted,
+      ])
+      expect(await response.json()).toMatchObject({ result: { ok: true, value: { accepted: true } } })
+      accepted = true
+      await compareOrRefreshGolden(ECHO_EXPECTED, echoSnapshot, MODE)
+      const row = page.getByRole('tree', { name: 'Sessions', exact: true })
+        .locator('[role="treeitem"][aria-selected="true"]')
+      await expect.poll(() => row.getAttribute('draggable'), { timeout: 5_000 }).toBe('true')
+      expect(sessionEvents.some(event => event.type === 'turn/start')).toBe(false)
+
+      const disconnected = remoteSocket
+      if (disconnected === undefined) throw new Error('the Web Remote socket never connected')
+      const warningStart = tripwire.warnings.length
+      // Only this list response carries the 2d timestamp. Its rendered label
+      // confirms the refresh reached the row, without altering blank/running.
+      const listUrl = new URL('/api/session/list', scaffold.baseUrl).href
+      const markListResponse = async (route: Route): Promise<void> => {
+        const response = await route.fetch()
+        try {
+          const body = await response.json() as SessionListResponse
+          if (body.result.ok) {
+            body.result = { ...body.result, value: {
+              ...body.result.value,
+              items: body.result.value.items.map(item => item.sessionId === sessionId
+                ? { ...item, updatedAt: browserNow - 2 * 86_400_000 }
+                : item),
+            } }
+          }
+          await route.fulfill({ response, json: body })
+        } finally {
+          await response.dispose()
+        }
+      }
+      await page.route(listUrl, markListResponse, { times: 1 })
+      try {
+        const refreshing = page.waitForResponse(listUrl)
+        const [, refreshed] = await Promise.all([disconnected.close(), refreshing])
+        // Cross-network reconnect: allow more than expect.poll's default.
+        await expect.poll(() => remoteSocket !== disconnected, { timeout: 15_000 }).toBe(true)
+        const baseline = await refreshed.json() as SessionListResponse
+        expect(baseline.result.ok).toBe(true)
+        if (!baseline.result.ok) throw new Error('the reconnect list request failed')
+        const hostSummary = baseline.result.value.items.find(item => item.sessionId === sessionId)
+        expect(hostSummary).toMatchObject({ blank: true, running: false })
+        await row.getByText('2d', { exact: true }).waitFor()
+        expect(await row.getAttribute('draggable')).toBe('true')
+        expect(await row.getByText('New Session', { exact: true }).count()).toBe(0)
+        expect(sessionEvents.some(event => event.type === 'turn/start')).toBe(false)
+        const checkpoint = [
+          `selected sidebar rows: ${await row.count()}`,
+          `new-session labels: ${await row.getByText('New Session', { exact: true }).count()}`,
+          `row draggable: ${await row.getAttribute('draggable')}`,
+          `host history blank: ${hostSummary?.blank}`,
+          `composer: ${JSON.stringify(await input.textContent())}`,
+          `contenteditable: ${await input.getAttribute('contenteditable')}`,
+        ].join('\n')
+        await compareOrRefreshGolden(ACCEPTED_RECONNECT_EXPECTED, checkpoint, MODE)
+        acknowledgeReloadConnectionLoss(tripwire, warningStart)
+      } finally {
+        await page.unroute(listUrl, markListResponse)
+      }
+    } finally {
+      // No turn can settle before maintenance releases the accepted input.
+      const settled = accepted ? scaffold.whenTurnSettled() : undefined
+      release.resolve(undefined)
+      await maintenance
+      if (settled !== undefined) settledSessionId = await settled
+      await agent.whenIdle()
+    }
     if (MODE === 'record') {
       await recordFixture(scaffold, sessionId, FIXTURE)
     }
@@ -237,12 +331,13 @@ describe('web e2e: fresh round trip through the real assembly', () => {
     await expect.poll(() => think.getAttribute('aria-expanded'), { timeout: 5_000 }).toBe('false')
   })
 
-  it.skipIf(MODE === 'record')('stayed clean: no pageerrors, no reconnect self-healing, no server errors', async () => {
+  it.skipIf(MODE === 'record')('stayed clean after the intentional reconnect: no pageerrors or server errors', async () => {
     expect(tripwire.pageErrors).toEqual([])
     expect(tripwire.warnings).toEqual([])
     await assertFixtureInventory(SNAPSHOT_DIR, [
       'blank-reload.expected.md',
       'session.v3.jsonl',
+      'accepted-reconnect.expected.md',
       'submission-echo.expected.md',
       'system-prompt.expected.md',
       'tool-schemas.expected.json',

packages/api/session-controller/README.i18n.yaml

@@ -2,5 +2,5 @@
 # side as of the last confirmed-consistent state. Both languages carry equal authority;
 # after editing either side, bring the other along and re-record with:
 #   pnpm run verify-translation-pairing --write packages/api/session-controller/README.md
-README.md: c9f63d462c6e291abda7312c66c8fffcd7109c57
-README.zh.md: f6d03b45b6bf9d3e809e70154adacd59ce341721
+README.md: 56d0f17b815a4616707d33bfd84b77446125f742
+README.zh.md: 9d754a5a61da548e1fd6dd10d1332582bdd3d126

packages/api/session-controller/README.md

@@ -39,6 +39,8 @@ Client list refreshes retain unchanged row objects and reuse the items array whe
 
 Projection reads retain loading and failure state independently of their values. Reconnect cancels reads from the previous connection and reloads previously requested projections; live membership updates arrive through the control stream. Parent availability comes from Host summaries and remains unknown until a summary or a successful list baseline establishes it. Address lookup resolves projected children without selecting them or creating scopes.
 
+Accepted prompts and observed running keep their Client display conversion across list refresh, reconnect, and Session-object replacement. The Manager retains these observations by Session id; they do not establish durable history. Drafts, projection stores, and sidebar display rules retain their existing behavior. The [blank rollback decision](../../../.agents/notes/implemented/bug-fix/2026-09-15-client-session-blank-reconciliation.md) defines retention and late-response handling.
+
 The Client adapter exposes `SessionEventStream`, a Gateway `RemoteJournalStream` bound to one ordinary or direct-subagent address. It opens follow before the initial page, publishes only contiguous `replace`, `prepend`, `append`, and `settle-assistant` changes, and repairs reconnect or sequence gaps through a tail page. Backwards paging has two verbs: `loadOlder()` pulls one 50-message page, and `loadThrough(seq)` — the turn-jump loader — loops 200-message pages until the window covers the target seq, lowering a shared target on repeated calls, stopping on a page that makes no progress, and reporting busy through the same `loadingOlder` snapshot bit. The Web adapter explicitly opts into cursorless Assistant frames: each opening carries the active attempt's `startedAfterSeq`, `nextIndex`, and compact stream, and every stream member becomes a Client-only `assistant/live-chunk` entry ordered between durable cursors. The Host captures a follower-local arrival ordinal with that baseline and suppresses buffered frames at or before the cut; a replacement Agent may restart frame revision at one. A durable `assistant/message` or `assistant/attempt` arriving after an active opening stays staged only when its seq follows `startedAfterSeq` and its Turn and Step match; the matching end type, seq, and index publishes one named settlement delta that retires the attempt's transient rows and adds the durable entry while earlier same-step retries remain visible. Revision, dense-index, or settlement gaps for a known attempt reopen follow, while a controller that missed the start ignores unknown-attempt frames and publishes their durable settlement normally. An abandoned end publishes a settlement delta without a durable entry so its transient rows retire immediately. A durable gap-repair page has no Assistant baseline, so its held notification reopens follow once for a paired page and baseline. Every history record covers exactly its event seq. A business, persistence, or unresolved continuity failure terminates the stream, while only physical carrier loss selects automatic resumption. `SessionControlStream` is a Gateway `RemoteSnapshotStream`; every generation opens with a complete process-local baseline, so reconnect replaces jobs and projection state instead of treating transient values as durable events. At each ready Host generation, a synchronous Client subscription clears retained projection values and watermarks before refreshing queries and restarting the control stream, including Sessions absent from the control baseline. The first control stream waits for generation readiness, so its opening values cannot precede invalidation. Outstanding list responses from the previous generation cannot republish those values. Within a generation, a delayed control baseline cannot overwrite or clear newer sequenced values, whether they arrived through a live Session's list block, a history page, or a frame; a cached list block, viewed from the projection cache for a cold Session, yields to the connected Session's baseline whatever watermark it carries. The durable `inbox` projection carries both pending lists through the same cold-read and reconnect path as other projections. Client Agent contexts provide the identity used by the independent [`fileUpload`](../../client/file-upload/README.md) service; Session objects expose lifecycle, prompt, queue, and history operations rather than file transfer.
 
 The Session object also carries local submission echoes: `session.beginSubmission` inserts one into `SessionSnapshot.pendingSubmissions` synchronously, before the caller serializes and prompts, so a conversation UI can show the message on the submit click's own frame. The echo stores ordered image previews and durable file references. Session derives its `transcript`, `queued`, or `steering` placement from the current running state and requested delivery mode, then retains that placement while serialization is in flight. The prompt's `requestId` is the correlation identity: the Host echoes it as the durable user source's `rpcId`, including pending messages in the `inbox` projection. An echo retires one animation frame after its durable event or queue occurrence is observed, immediately when its identified prompt fails or is abandoned, and as failed on disposal. Each retirement fires `onRetire` exactly once; an observed retirement includes the ordered durable attachment references so the composer can release successful cards while preserving failed drafts. Echoes are Client memory only; reload and reconnect rebuild the conversation from durable events alone.
@@ -99,6 +101,8 @@ No direct effect; model requests remain owned by the Agent and LLM packages.
 - A failed follow resumption remains visible to the caller instead of retrying indefinitely.
 - The raw browser upload is one streaming HTTP request without resumable offsets; a retry sends the file again from byte zero.
 - File-reference completion uses the shared Agent lookup and can resume a cold Session; the `skills/list` catalog is the non-activating alternative for skill metadata.
+- Accepted/running display memory lives only in Client memory and is lost on page reload.
+- That memory is not shared between tabs: one tab can show a converted row while another still shows `New Session` for the same Session.
 
 
 <a id="dev-note"></a>

packages/api/session-controller/README.zh.md

@@ -39,6 +39,8 @@ Client 列表刷新保留未变化的行对象，并在顺序和值均相同时
 
 投影读取独立于其值保留加载与失败状态。重连会取消上一连接的读取，并重新加载已请求的投影；实时成员更新通过 control stream 到达。父 Agent 可用性来自 Host 摘要，在收到对应摘要或成功的列表 baseline 前保持未知。地址查找直接解析投影中的子项，不会选择它们或创建 scope。
 
+已受理的提示词与已观察到的运行，会使客户端展示转换跨列表刷新、重连及 Session 对象替换保留。Manager 按 Session id 保留这些观察；它们不证明持久历史已经产生。草稿、投影存储和侧边栏展示规则保留原有行为。[blank 回退修复决策](../../../.agents/notes/implemented/bug-fix/2026-09-15-client-session-blank-reconciliation.zh.md) 定义保留期限及迟到响应处理。
+
 Client 适配器提供 `SessionEventStream`，即绑定到一个普通 Session 或 direct subagent address 的 Gateway `RemoteJournalStream`。它在读取首个 page 前打开 follow，只发布连续的 `replace`、`prepend`、`append` 与 `settle-assistant` 变更，并通过 tail page 修复重连或 seq 缺口。向后分页有两个动词：`loadOlder()` 拉一页 50 条消息，而 `loadThrough(seq)`——轮次跳转加载器——按每页 200 条消息循环拉取直到窗口覆盖目标 seq，重复调用会下调共享目标，遇到无进展的页即停止，忙碌状态复用同一个 `loadingOlder` 快照位。Web 适配器显式选择接收无 cursor 的 Assistant frame：每个 opening 携带活跃 attempt 的 `startedAfterSeq`、`nextIndex` 与紧凑 stream，每个 stream member 都成为排在持久 cursor 之间的 Client-only `assistant/live-chunk` 条目。Host 会随该 baseline 捕获 follower 本地到达序号，并抑制该 cut 及之前的 buffered frame；replacement Agent 可以从 revision 一重新开始。活跃 opening 之后到达的持久 `assistant/message` 或 `assistant/attempt` 只有在其 seq 晚于 `startedAfterSeq` 且轮次与步骤匹配时才会保持暂存；匹配的 end type、seq 与 index 会发布一个具名 settlement delta，删除该 attempt 的瞬态 row、加入持久条目，并保留同一步骤中更早的 retry。已知 attempt 的 revision、密集 index 或 settlement 缺口会重新打开 follow；若 controller 错过 start，则忽略 unknown-attempt frame，并正常发布其持久 settlement。Abandoned end 会发布不含持久条目的 settlement delta，使瞬态 row 立即退出。持久缺口修复 page 不携带 Assistant baseline，因此 held notification 会重新打开 follow 一次，以取得配对的 page 与 baseline。每条历史 record 只覆盖自身的事件 seq。业务、persistence 或无法恢复的连续性错误会终止 stream，只有物理载体断开才触发自动恢复。`SessionControlStream` 是 Gateway `RemoteSnapshotStream`；每代都以完整的进程本地 baseline 开始，因此重连会替换 jobs 和 projection 状态，而不会把瞬态值当作 durable event。每次 Host generation 就绪时，同步的 Client 订阅会先清除保留的投影值及其水位，再刷新查询并重新打开 control stream，其中也包括 control baseline 中没有列出的 Session。首次 control stream 会等待 generation 就绪，确保其 opening 值不会先于旧状态清理到达。上一代尚未完成的 list 响应无法重新发布这些值。同一 generation 内，延迟到达的 control baseline 不能覆盖或清除较新的 sequenced 值，无论它们来自活 Session 的 list block、history page 还是 frame；冷 Session 从 projection cache 看出来的 cached list block 则不论水位都让位于建连 Session 的 baseline。持久 `inbox` 投影通过与其他投影相同的冷读取和重连路径传输两份待处理列表。Client Agent 上下文提供独立 [`fileUpload`](../../client/file-upload/README.zh.md) 服务使用的身份；Session 对象提供生命周期、prompt、queue 与历史操作，不提供文件传输。
 
 Session 对象还承载本地提交回显：`session.beginSubmission` 在调用方序列化与提示词之前，同步把一条回显写入 `SessionSnapshot.pendingSubmissions`，会话 UI 因此能在点击提交的当帧显示消息。回显按顺序存放图片预览与持久文件引用。Session 根据当前运行状态与请求的投递模式推导其 `transcript`、`queued` 或 `steering` 位置，并在序列化期间保留该位置。提示词的 `requestId` 是关联标识：Host 把它回显为 durable user source 的 `rpcId`，`inbox` 投影中的待处理消息也保留同一 source。回显在观察到其 durable event 或 queue occurrence 后延迟一个动画帧退休，带标识的提示词失败或被放弃时立即退休，销毁时按 failed 退休。每次退休恰好触发一次 `onRetire`；observed 退休还会携带有序的持久附件引用，让 composer 释放成功卡片并保留失败草稿。回显只存在于 Client 内存；刷新与重连只从持久事件重建会话。
@@ -99,6 +101,8 @@ Fork 复制 `atSeq` 所选的精确事件前缀，包含切点事件，允许在
 - follow 恢复失败会对调用方可见，而不会无限重试。
 - 浏览器原始字节上传使用一次不带断点续传偏移的流式 HTTP 请求；重试会从第零字节重新传输整个文件。
 - 文件引用补全使用共享 Agent lookup，因此可能恢复冷 Session；`skills/list` 目录是不激活 Agent 的 skill 元数据读取路径。
+- 受理/运行的展示记忆只存在于客户端内存，页面重载后即丢失。
+- 该记忆不在 tab 之间共享：同一会话可能在一个 tab 中已转正，在另一个 tab 中仍显示为 `New Session`。
 
 
 <a id="dev-note"></a>

packages/api/session-controller/src/client/sessions/lineage.ts

@@ -19,7 +19,10 @@ export interface SessionListEntry {
   title?: string
   updatedAt: number
   running: boolean
-  /** Summary blankness reconciled with `sessionListMetadata`; lists hide blank sessions (filtering stays with the consumer). */
+  /**
+   * New Session presentation and reuse eligibility, reconciled with
+   * `sessionListMetadata`; lists hide blank sessions (filtering stays with the consumer).
+   */
   blank: boolean
   parentSessionId?: SessionId
   /** Coarse durable origin for navigation filtering; not a continuation capability. */

packages/api/session-controller/src/client/sessions/manager.ts

@@ -87,6 +87,15 @@ export class SessionManager {
   private readonly sessions = new Map<SessionId, Session>()
   /** In-flight Session disposals remain here after instances leave `sessions`, so manager disposal can await quiescence. */
   private readonly sessionDisposals = new Set<Promise<void>>()
+  /**
+   * Accepted/running presentation must survive a later empty-history list
+   * response. Host-asserted running is recorded even before a row, instance, or
+   * address holds the identity — the listing that would hold it may not have
+   * landed yet — while the client-local acceptance callback requires a current
+   * holder, because it can arrive from a replaced or already-dropped Session.
+   */
+  private readonly engagedSessions = new Set<SessionId>()
+  private disposed = false
   /** Per-session projection value stores, retained independently of instance arrival (the
    *  title-snapshot precedent, generalized): push frames land here whether or not the Session
    *  is instantiated (list rows read the 'title' key), and an instantiated Session adopts the
@@ -184,6 +193,7 @@ export class SessionManager {
     if (session !== expected) return Promise.resolve()
     this.sessions.delete(sessionId)
     this.addresses.delete(sessionId)
+    this.pruneEngagement(sessionId, this.retainedIds(this.summaries))
     return this.startSessionDisposal(session)
   }
 
@@ -192,6 +202,10 @@ export class SessionManager {
    * @returns once catalog requests and every Session stream have stopped.
    */
   async dispose(): Promise<void> {
+    this.disposed = true
+    this.listMutations = null
+    this.listInflight = null
+    this.engagedSessions.clear()
     const reads = [...this.projectionInflight.values()]
     for (const { controller } of reads) controller.abort()
     this.projectionInflight.clear()
@@ -235,7 +249,7 @@ export class SessionManager {
       // instance (consistency when the list precedes open).
       const summary = this.summaries.find(s => s.sessionId === sessionId)
       if (summary !== undefined) {
-        session.handleBlank(summary.blank)
+        session.handleBlank(this.effectiveBlank(summary))
         session.handleRunning(summary.running)
       } else {
         const address = this.addresses.get(sessionId)
@@ -268,12 +282,44 @@ export class SessionManager {
       // The sender's local first-send flip mirrors into the list row so the
       // session surfaces (lists filter on blank) before any host frame lands.
       onEngaged: (engaged) => {
-        this.recordMutation({ kind: 'engaged', sessionId: engaged.sessionId })
+        if (this.disposed || !this.retainedIds(this.summaries).has(engaged.sessionId)) return
+        // An identity already on the ledger needs no second row mutation.
+        if (!this.engagedSessions.has(engaged.sessionId)) {
+          this.engagedSessions.add(engaged.sessionId)
+          this.recordMutation({ kind: 'engaged', sessionId: engaged.sessionId })
+        }
+        this.sessions.get(engaged.sessionId)?.handleBlank(false)
       },
       projections: this.projectionStore(sessionId),
     })
   }
 
+  private effectiveBlank(summary: SessionSummary): boolean {
+    return summary.blank && !this.engagedSessions.has(summary.sessionId)
+  }
+
+  /**
+   * Identities an engagement may still belong to: the given list rows, resident
+   * Session instances, and retained child addresses.
+   * @param summaries - list rows of the caller's snapshot.
+   * @returns the retained identity set.
+   */
+  private retainedIds(summaries: readonly SessionSummary[]): Set<SessionId> {
+    const retained = new Set(summaries.map(summary => summary.sessionId))
+    for (const sessionId of this.sessions.keys()) retained.add(sessionId)
+    for (const sessionId of this.addresses.keys()) retained.add(sessionId)
+    return retained
+  }
+
+  /**
+   * Forget one engagement that no retained identity holds.
+   * @param sessionId - identity whose engagement may be dropped.
+   * @param retained - identities from {@link retainedIds} for the caller's snapshot.
+   */
+  private pruneEngagement(sessionId: SessionId, retained: ReadonlySet<SessionId>): void {
+    if (!retained.has(sessionId)) this.engagedSessions.delete(sessionId)
+  }
+
   /** Resident per-session projection store (create-on-demand; outlives instantiation). */
   private projectionStore(sessionId: SessionId): ProjectionValueStore {
     let store = this.projectionStores.get(sessionId)
@@ -367,15 +413,27 @@ export class SessionManager {
           const baseline: SessionSummary[] = this.listPhase === 'pending'
             ? [...result.value.items]
             : mergeOrderedBaseline(established, result.value.items, summary => summary.sessionId)
-          this.summaries = mutations.reduce(applyMutation, baseline)
+          // A removal supersedes running observed in the pull, including after re-addition.
+          const removedSincePull = new Set<SessionId>()
+          for (const mutation of mutations) {
+            if (mutation.kind === 'remove') removedSincePull.add(mutation.sessionId)
+          }
+          for (const s of baseline) {
+            if (s.running && !removedSincePull.has(s.sessionId)) this.engagedSessions.add(s.sessionId)
+          }
+          const summaries = mutations.reduce(applyMutation, baseline)
+          this.summaries = summaries
+          // A full list can remove identities without a removal frame.
+          const retained = this.retainedIds(summaries)
+          for (const sessionId of this.engagedSessions) this.pruneEngagement(sessionId, retained)
           this.listState = 'idle'
           this.listPhase = 'ready'
           this.updateParentAvailability()
-          // Sessions reconcile list blank hints with their current metadata projection.
+          // Resident Sessions and list rows share one display blank, reconciled with the metadata projection.
           for (const s of this.summaries) {
             const session = this.sessions.get(s.sessionId)
             if (session === undefined) continue
-            session.handleBlank(s.blank)
+            session.handleBlank(this.effectiveBlank(s))
             session.handleRunning(s.running)
           }
           // Land each row's projection block in the per-session value store
@@ -524,6 +582,7 @@ export class SessionManager {
 
   /** Apply immediately and retain for replay when a list response is in flight. */
   private recordMutation(mutation: SessionListMutation): void {
+    if (this.disposed) return
     this.listMutations?.push(mutation)
     this.summaries = applyMutation(this.summaries, mutation)
     this.notifier.markDirty()
@@ -599,7 +658,8 @@ export class SessionManager {
    */
   handleSessionAdded(summary: SessionSummary): void {
     this.mergeSummary(summary)
-    this.sessions.get(summary.sessionId)?.handleBlank(summary.blank)
+    if (!this.disposed && summary.running) this.engagedSessions.add(summary.sessionId)
+    this.sessions.get(summary.sessionId)?.handleBlank(this.effectiveBlank(summary))
     if (summary.projections !== undefined) this.applyListBlock(summary.sessionId, summary.projections)
   }
 
@@ -644,6 +704,7 @@ export class SessionManager {
     if (!durableSubagent && (catalog === undefined || catalog.length === 0)) {
       this.projectionStores.delete(sessionId)
     }
+    this.pruneEngagement(sessionId, this.retainedIds(this.summaries))
     this.projectionInflight.get(sessionId)?.controller.abort()
     this.projectionInflight.delete(sessionId)
     this.projectionLoads.delete(sessionId)
@@ -660,6 +721,7 @@ export class SessionManager {
    * @param running - current Agent running state.
    */
   handleSessionStatus(sessionId: SessionId, running: boolean): void {
+    if (!this.disposed && running) this.engagedSessions.add(sessionId)
     this.recordMutation({ kind: 'status', sessionId, running, agentAvailable: true })
     this.updateParentAvailability()
     this.sessions.get(sessionId)?.handleRunning(running)
@@ -716,7 +778,7 @@ export class SessionManager {
       return {
         ...summary,
         // Cached list hints can precede a history opening or control update.
-        blank: summary.blank && metadata?.blank !== false,
+        blank: this.effectiveBlank(summary) && metadata?.blank !== false,
         updatedAt: Math.max(summary.updatedAt, metadata?.lastPromptAt ?? 0),
         ...(typeof title === 'string' && title !== '' ? { title } : {}),
         ...(projectionValues === undefined ? {} : { projectionValues }),
@@ -786,8 +848,7 @@ function applyMutation(summaries: readonly SessionSummary[], mutation: SessionLi
     case 'remove':
       return summaries.filter(summary => summary.sessionId !== mutation.sessionId)
     case 'status':
-      // running:true doubles as the cross-client blank flip (a blank session
-      // never runs, so the first running frame proves a message landed).
+      // Running converts display state; it does not establish durable history.
       return summaries.map(summary => summary.sessionId === mutation.sessionId
         && (summary.running !== mutation.running
           || summary.agentAvailable !== mutation.agentAvailable || (mutation.running && summary.blank))

packages/api/session-controller/src/client/sessions/service.ts

@@ -39,7 +39,8 @@ export interface SessionSummary {
   /** Local ownership counts; Host metadata refreshes cannot overwrite them. */
   readonly retainedBy: SessionRetainInfo['retainedBy']
   /**
-   * Blankness from the Host summary reconciled with `sessionListMetadata`.
+   * New Session presentation and reuse eligibility, derived from the Host
+   * summary, `sessionListMetadata`, and client acceptance/running observations.
    * New Session reuses a blank one targeting the same workspace. Filtering
    * stays with the consumer: the store carries every row, while the Workspace
    * browser shows only the selected blank entry.

packages/api/session-controller/src/client/sessions/session.ts

@@ -66,12 +66,9 @@ export interface SessionOptions {
   /** Whether the exact direct parent Agent is available in Host summaries; absent until known. */
   parentAvailable?: boolean
   /**
-   * First ACCEPTED prompt on a blank session (fires at most once, on the
-   * prompt RPC's success response): the manager mirrors the blank→false flip
-   * into its list row so the session surfaces without waiting for a host
-   * frame. Acceptance is the flip point because it proves the user message
-   * is in the host log; a rejected first prompt keeps the session blank
-   * (hidden, still reusable by connectWorkspace).
+   * Publish each accepted prompt to the Manager, including after this Session
+   * object is replaced. Acceptance converts display state, but does not
+   * establish that a turn started or reached durable history.
    */
   onEngaged?(session: Session): void
   /**
@@ -117,7 +114,7 @@ export class Session implements SessionFace {
   private promptAttempted = false
   /** A first accepted prompt stays in the engaging phase until its turn is observable. */
   private firstPromptPendingTurn = false
-  /** Empty-log mirror (see ConversationSnapshot.blank); unknown bare sessions begin conservatively blank. */
+  /** New Session display state; unknown bare sessions begin conservatively blank. */
   private blankBit = true
   private removed = false
   private promptError: PromptError | null = null
@@ -291,19 +288,12 @@ export class Session implements SessionFace {
       this.notifier.markDirty()
       return result
     }
-    // Blank flips on ACCEPTANCE, not attempt: an accepted prompt starts the
-    // conversation's first turn on the host (the host criterion — a logged
-    // turn/start — is fact, not optimism; standalone command and projection
-    // events never flip it), while a rejected first prompt must keep the
-    // session blank — the client-side blank mirror only ever lowers, so
-    // flipping early on a failure would surface the session forever and
-    // strip its connectWorkspace reuse eligibility against the host's
-    // authority.
+    // Rejection must leave a first prompt blank and eligible for workspace reuse.
     if (this.blankBit) {
       this.blankBit = false
-      this.options.onEngaged?.(this)
       this.notifier.markDirty()
     }
+    this.options.onEngaged?.(this)
     return result
   }
 
@@ -514,8 +504,7 @@ export class Session implements SessionFace {
    * @param running - the new running state.
    */
   handleRunning(running: boolean): void {
-    // Turn-start conversion: a blank session never runs, so the first
-    // running:true proves another side's first message landed.
+    // Running converts display state without establishing durable turn history.
     if (running && this.blankBit) {
       this.blankBit = false
       this.notifier.markDirty()
@@ -553,9 +542,12 @@ export class Session implements SessionFace {
   }
 
   /**
-   * Relay list blankness without overriding a started conversation established
-   * by the current projection, a local prompt, or running state.
-   * @param blank - whether the list or projection reports an unstarted conversation.
+   * Apply the Manager's effective display blank, further reconciled with the
+   * current `sessionListMetadata` projection. Local send attempts and current
+   * running state prevent re-blanking; an earlier false summary alone does not.
+   * The Manager retains acceptance and earlier running observations across
+   * Session-object replacement.
+   * @param blank - New Session display state after Manager reconciliation.
    */
   handleBlank(blank: boolean): void {
     blank = blank && this.projections.values().sessionListMetadata?.blank !== false

packages/api/session-controller/tests/manager.client.spec.ts

@@ -3,8 +3,9 @@
  * frame routing, and control baselines for uninstantiated sessions.
  */
 
-import { describe, expect, vi } from 'vitest'
+import { describe, expect, onTestFinished, vi } from 'vitest'
 import type { SessionId } from '@deepseek-ai/dsh-api-remotes/client'
+import type { SubagentAddress } from '@deepseek-ai/dsh-subagent/client'
 import { SessionSeq } from '@deepseek-ai/dsh-session/types'
 import { RemoteError } from '@deepseek-ai/dsh-typert-protocol'
 import type { SessionControlFrame } from '@deepseek-ai/dsh-api-session-controller/types'
@@ -48,6 +49,318 @@ function makeManager(
 }
 
 describe('SessionManager instances', () => {
+  it.for(['event', 'list'] as const)(
+    'forgets running when an unretained identity disappears through a %s',
+    async (source, { mock, remote }) => {
+      const manager = makeManager(mock, remote)
+      onTestFinished(() => manager.dispose())
+      remote.session.list.mockResolvedValueOnce(ok({ items: [summary(S1, { blank: true })] }))
+      await manager.refreshList()
+      manager.handleSessionStatus(S1, true)
+      manager.handleSessionStatus(S1, false)
+      expect(manager.getListSnapshot().items[0]?.blank).toBe(false)
+
+      if (source === 'event') manager.handleSessionRemoved(S1)
+      else {
+        remote.session.list.mockResolvedValueOnce(ok({ items: [] }))
+        await manager.refreshList()
+      }
+      expect(manager.getListSnapshot().items).toEqual([])
+      manager.handleSessionAdded(summary(S1, { blank: true }))
+
+      expect(manager.getListSnapshot().items[0]?.blank).toBe(true)
+    },
+  )
+
+  it('retains acceptance while an unlisted Session remains resident, then forgets it on drop', async ({ mock, remote }) => {
+    const manager = makeManager(mock, remote)
+    onTestFinished(() => manager.dispose())
+    manager.handleSessionAdded(summary(S1, { blank: true }))
+    const session = manager.get(S1)
+    await session.prompt([{ type: 'text', text: 'first' }], 'queue')
+    remote.session.list.mockResolvedValue(ok({ items: [] }))
+
+    await manager.refreshList()
+    expect(manager.getListSnapshot().items).toEqual([])
+    expect(session.getSnapshot().blank).toBe(false)
+    manager.handleSessionAdded(summary(S1, { blank: true }))
+    expect(manager.getListSnapshot().items[0]?.blank).toBe(false)
+
+    await manager.refreshList()
+    await manager.drop(S1, session)
+    manager.handleSessionAdded(summary(S1, { blank: true }))
+    expect(manager.getListSnapshot().items[0]?.blank).toBe(true)
+  })
+
+  it('retains running for an unlisted child with only a retained address', async ({ mock, remote }) => {
+    const address: SubagentAddress = { parentSessionId: S1, childSessionId: S2, mode: 'continuable' }
+    const manager = makeManager(mock, remote)
+    onTestFinished(() => manager.dispose())
+    manager.resolveTarget(address)
+    manager.handleSessionAdded(summary(S2, { blank: true }))
+    manager.handleSessionStatus(S2, true)
+    manager.handleSessionStatus(S2, false)
+    remote.session.list.mockResolvedValueOnce(ok({ items: [] }))
+
+    await manager.refreshList()
+    expect(manager.getListSnapshot().items).toEqual([])
+    manager.handleSessionAdded(summary(S2, { blank: true }))
+
+    expect(manager.getListSnapshot().items[0]?.blank).toBe(false)
+  })
+
+  it('retains running for a row added during a pull whose baseline omits it', async ({ mock, remote }) => {
+    const manager = makeManager(mock, remote)
+    onTestFinished(() => manager.dispose())
+    manager.handleSessionAdded(summary(S1, { blank: true }))
+    manager.handleSessionStatus(S1, true)
+    manager.handleSessionStatus(S1, false)
+    const response = Promise.withResolvers<Awaited<ReturnType<typeof remote.session.list>>>()
+    remote.session.list.mockReturnValueOnce(response.promise)
+    const refreshing = manager.refreshList()
+    manager.handleSessionAdded(summary(S1, { blank: true }))
+    response.resolve(ok({ items: [] }))
+
+    await refreshing
+
+    expect(manager.getListSnapshot().items[0]?.blank).toBe(false)
+  })
+
+  it.for(['result', 'transport'] as const)(
+    'retains running observed before listing when the pull fails through %s',
+    async (source, { mock, remote }) => {
+      const manager = makeManager(mock, remote)
+      onTestFinished(() => manager.dispose())
+      manager.handleSessionStatus(S1, true)
+      manager.handleSessionStatus(S1, false)
+      const error = new RemoteError('gateway/internal', 'list unavailable', {})
+      if (source === 'result') remote.session.list.mockResolvedValueOnce(err(error))
+      else remote.session.list.mockRejectedValueOnce(error)
+
+      await manager.refreshList()
+      expect(manager.getListSnapshot().state).toBe('error')
+      manager.handleSessionAdded(summary(S1, { blank: true }))
+
+      expect(manager.getListSnapshot().items[0]?.blank).toBe(false)
+    },
+  )
+
+  it('accepts a later blank baseline without an acceptance or running observation', async ({ mock, remote }) => {
+    const manager = makeManager(mock, remote)
+    onTestFinished(() => manager.dispose())
+    manager.handleSessionAdded(summary(S1, { blank: false }))
+    const session = manager.get(S1)
+    expect(session.getSnapshot().blank).toBe(false)
+    remote.session.list.mockResolvedValueOnce(ok({ items: [summary(S1, { blank: true })] }))
+
+    await manager.refreshList()
+
+    expect(manager.getListSnapshot().items[0]?.blank).toBe(true)
+    expect(session.getSnapshot().blank).toBe(true)
+  })
+
+  it('retains acceptance received before the first list response', async ({ mock, remote }) => {
+    const manager = makeManager(mock, remote)
+    onTestFinished(() => manager.dispose())
+    const response = Promise.withResolvers<Awaited<ReturnType<typeof remote.session.list>>>()
+    remote.session.list.mockReturnValueOnce(response.promise)
+    const refreshing = manager.refreshList()
+    const session = manager.get(S1)
+    await session.prompt([{ type: 'text', text: 'first' }], 'queue')
+    expect(manager.getListSnapshot().items).toEqual([])
+    response.resolve(ok({ items: [summary(S1, { blank: true })] }))
+
+    await refreshing
+
+    expect(manager.getListSnapshot().items[0]?.blank).toBe(false)
+    expect(session.getSnapshot().blank).toBe(false)
+  })
+
+  it('keeps a rejected first prompt blank across refresh and object replacement', async ({ mock, remote }) => {
+    const manager = makeManager(mock, remote)
+    onTestFinished(() => manager.dispose())
+    manager.handleSessionAdded(summary(S1, { blank: true }))
+    remote.session.prompt.mockResolvedValueOnce(err(new RemoteError('session/agent-busy', 'busy', { reason: 'x' })))
+    const session = manager.get(S1)
+    expect((await session.prompt([{ type: 'text', text: 'first' }], 'queue')).ok).toBe(false)
+    remote.session.list.mockResolvedValueOnce(ok({ items: [summary(S1, { blank: true })] }))
+    await manager.refreshList()
+    await manager.drop(S1, session)
+
+    expect(manager.getListSnapshot().items[0]?.blank).toBe(true)
+    expect(manager.get(S1).getSnapshot().blank).toBe(true)
+  })
+
+  it('ignores running from a list response that predates removal, including after re-addition', async ({ mock, remote }) => {
+    for (const readdBeforeResponse of [false, true]) {
+      const manager = makeManager(mock, remote)
+      onTestFinished(() => manager.dispose())
+      manager.handleSessionAdded(summary(S1, { blank: true }))
+      const response = Promise.withResolvers<Awaited<ReturnType<typeof remote.session.list>>>()
+      remote.session.list.mockReturnValueOnce(response.promise)
+      const refreshing = manager.refreshList()
+      manager.handleSessionRemoved(S1)
+      if (readdBeforeResponse) manager.handleSessionAdded(summary(S1, { blank: true }))
+
+      response.resolve(ok({ items: [summary(S1, { blank: true, running: true })] }))
+      await refreshing
+      if (!readdBeforeResponse) {
+        expect(manager.getListSnapshot().items).toEqual([])
+        manager.handleSessionAdded(summary(S1, { blank: true }))
+      }
+
+      expect(manager.getListSnapshot().items[0]).toMatchObject({ blank: true, running: false })
+    }
+  })
+
+  it('retains running observations after re-addition while an older list response is pending', async ({ mock, remote }) => {
+    const manager = makeManager(mock, remote)
+    onTestFinished(() => manager.dispose())
+    manager.handleSessionAdded(summary(S1, { blank: true }))
+    const response = Promise.withResolvers<Awaited<ReturnType<typeof remote.session.list>>>()
+    remote.session.list.mockReturnValue(response.promise)
+    const refreshing = manager.refreshList()
+    manager.handleSessionRemoved(S1)
+    manager.handleSessionAdded(summary(S1, { blank: true }))
+    manager.handleSessionStatus(S1, true)
+    manager.handleSessionStatus(S1, false)
+
+    response.resolve(ok({ items: [summary(S1, { blank: true })] }))
+    await refreshing
+
+    expect(manager.getListSnapshot().items[0]).toMatchObject({ blank: false, running: false })
+  })
+
+  it('applies late acceptance to a re-added list row without materializing its Session', async ({ mock, remote }) => {
+    const manager = makeManager(mock, remote)
+    onTestFinished(() => manager.dispose())
+    manager.handleSessionAdded(summary(S1, { blank: true }))
+    const acceptance = Promise.withResolvers<Awaited<ReturnType<typeof remote.session.prompt>>>()
+    remote.session.prompt.mockReturnValue(acceptance.promise)
+    const session = manager.get(S1)
+    const sending = session.prompt([{ type: 'text', text: 'first' }], 'queue')
+    manager.handleSessionRemoved(S1)
+    await manager.drop(S1, session)
+    manager.handleSessionAdded(summary(S1, { blank: true }))
+    const getSession = vi.spyOn(manager, 'get')
+    onTestFinished(() => { getSession.mockRestore() })
+    acceptance.resolve(ok({ accepted: true }))
+    await sending
+    expect(manager.getListSnapshot().items[0]?.blank).toBe(false)
+    expect(getSession).not.toHaveBeenCalled()
+  })
+
+  it('publishes a late acceptance to the replacement Session with the same id', async ({ mock, remote }) => {
+    const manager = makeManager(mock, remote)
+    onTestFinished(() => manager.dispose())
+    manager.handleSessionAdded(summary(S1, { blank: true }))
+    const acceptance = Promise.withResolvers<Awaited<ReturnType<typeof remote.session.prompt>>>()
+    remote.session.prompt.mockReturnValue(acceptance.promise)
+    const session = manager.get(S1)
+    const sending = session.prompt([{ type: 'text', text: 'first' }], 'queue')
+    await manager.drop(S1, session)
+    const replacement = manager.get(S1)
+    expect(manager.getListSnapshot().items[0]?.blank).toBe(true)
+    expect(replacement.getSnapshot().blank).toBe(true)
+    acceptance.resolve(ok({ accepted: true }))
+    await sending
+
+    expect(manager.getListSnapshot().items[0]?.blank).toBe(false)
+    expect(replacement.getSnapshot().blank).toBe(false)
+    await manager.drop(S1, session)
+    expect(manager.get(S1)).toBe(replacement)
+  })
+
+  it('keeps accepted presentation when its Session is rebuilt', async ({ mock, remote }) => {
+    const manager = makeManager(mock, remote)
+    onTestFinished(() => manager.dispose())
+    manager.handleSessionAdded(summary(S1, { blank: true }))
+    const session = manager.get(S1)
+    await session.prompt([{ type: 'text', text: 'first' }], 'queue')
+    await manager.drop(S1, session)
+
+    expect(manager.getListSnapshot().items[0]?.blank).toBe(false)
+    expect(manager.get(S1).getSnapshot().blank).toBe(false)
+  })
+
+  it('publishes acceptance from a nonblank sender after its list row is replaced', async ({ mock, remote }) => {
+    const manager = makeManager(mock, remote)
+    onTestFinished(() => manager.dispose())
+    manager.handleSessionAdded(summary(S1, { blank: true }))
+    const sender = manager.get(S1)
+    await sender.prompt([{ type: 'text', text: 'first' }], 'queue')
+    const acceptance = Promise.withResolvers<Awaited<ReturnType<typeof remote.session.prompt>>>()
+    remote.session.prompt.mockReturnValueOnce(acceptance.promise)
+    const sending = sender.prompt([{ type: 'text', text: 'next' }], 'queue')
+    manager.handleSessionRemoved(S1)
+    await manager.drop(S1, sender)
+    manager.handleSessionAdded(summary(S1, { blank: true }))
+    const replacement = manager.get(S1)
+    expect(manager.getListSnapshot().items[0]?.blank).toBe(true)
+    expect(replacement.getSnapshot().blank).toBe(true)
+
+    acceptance.resolve(ok({ accepted: true }))
+    await sending
+
+    expect(manager.getListSnapshot().items[0]?.blank).toBe(false)
+    expect(replacement.getSnapshot().blank).toBe(false)
+  })
+
+  it('keeps observed running presentation across idle empty-history summaries', async ({ mock, remote }) => {
+    for (const source of ['addition', 'refresh'] as const) {
+      const manager = makeManager(mock, remote)
+      onTestFinished(() => manager.dispose())
+      manager.handleSessionAdded(summary(S1, { blank: true }))
+      const session = manager.get(S1)
+      manager.handleSessionStatus(S1, true)
+      manager.handleSessionStatus(S1, false)
+      expect(session.getSnapshot().blank).toBe(false)
+
+      if (source === 'addition') manager.handleSessionAdded(summary(S1, { blank: true }))
+      else {
+        remote.session.list.mockResolvedValueOnce(ok({ items: [summary(S1, { blank: true })] }))
+        await manager.refreshList()
+      }
+
+      expect(manager.getListSnapshot().items[0]?.blank).toBe(false)
+      expect(session.getSnapshot().blank).toBe(false)
+    }
+  })
+
+  it('does not restore a removed row or publish after disposal when acceptance arrives late', async ({ mock, remote }) => {
+    for (const dispose of [false, true]) {
+      const manager = makeManager(mock, remote)
+      onTestFinished(() => manager.dispose())
+      manager.handleSessionAdded(summary(S1, { blank: true }))
+      const acceptance = Promise.withResolvers<Awaited<ReturnType<typeof remote.session.prompt>>>()
+      remote.session.prompt.mockReturnValue(acceptance.promise)
+      const session = manager.get(S1)
+      const sending = session.prompt([{ type: 'text', text: 'first' }], 'queue')
+      manager.handleSessionRemoved(S1)
+      if (dispose) await manager.dispose()
+      else await manager.drop(S1, session)
+      const notify = vi.fn()
+      const unsubscribe = manager.subscribe(notify)
+      onTestFinished(unsubscribe)
+      acceptance.resolve(ok({ accepted: true }))
+      await sending
+      expect(manager.getListSnapshot().items).toEqual([])
+      expect(notify).not.toHaveBeenCalled()
+    }
+  })
+
+  it('keeps accepted presentation across a later list refresh without a turn', async ({ mock, remote }) => {
+    const manager = makeManager(mock, remote)
+    onTestFinished(() => manager.dispose())
+    remote.session.list.mockResolvedValue(ok({ items: [summary(S1, { blank: true })] as never[] }))
+    await manager.refreshList()
+    await manager.get(S1).prompt([{ type: 'text', text: 'first' }], 'queue')
+    expect(manager.getListSnapshot().items[0]?.blank).toBe(false)
+
+    await manager.refreshList()
+    expect(manager.getListSnapshot().items[0]?.blank).toBe(false)
+  })
+
   it('lazily builds one resident instance per id and syncs the running bit from the list', async ({ mock, remote }) => {
     remote.session.list.mockResolvedValue(ok({ items: [summary(S1, { running: true })] as never[] }))
     const manager = makeManager(mock, remote)
@@ -876,6 +1189,32 @@ describe('remaining branches', () => {
 })
 
 describe('connected generation', () => {
+  it('does not prune running observations from a superseded empty list response', async ({ mock, remote }) => {
+    const manager = makeManager(mock, remote)
+    onTestFinished(() => manager.dispose())
+    const oldList = Promise.withResolvers<Awaited<ReturnType<typeof remote.session.list>>>()
+    const newList = Promise.withResolvers<Awaited<ReturnType<typeof remote.session.list>>>()
+    remote.session.list.mockReturnValueOnce(oldList.promise).mockReturnValueOnce(newList.promise)
+    const oldPull = manager.refreshList()
+    manager.handleSessionStatus(S1, true)
+    manager.handleSessionStatus(S1, false)
+    manager.handleConnected()
+    const newPull = manager.refreshList()
+    try {
+      oldList.resolve(ok({ items: [] }))
+      await oldPull
+      expect(manager.getListSnapshot().state).toBe('loading')
+      newList.resolve(ok({ items: [summary(S1, { blank: true })] }))
+      await newPull
+
+      expect(manager.getListSnapshot().items[0]?.blank).toBe(false)
+    } finally {
+      oldList.resolve(ok({ items: [] }))
+      newList.resolve(ok({ items: [] }))
+      await Promise.all([oldPull, newPull])
+    }
+  })
+
   it.for(['old-first', 'new-first'] as const)(
     'ignores a previous generation list response (%s)',
     async (order, { mock, remote }) => {

packages/api/session-controller/tests/session.client.spec.ts

@@ -625,6 +625,30 @@ describe('prompt and cancel errors', () => {
     expect(session.getSnapshot()).toMatchObject({ running: true, awaitingFirstTurn: false })
   })
 
+  it('does not await a first turn when the history already contains one', async ({ mock, start }) => {
+    const session = await sessionBench(mock, start, SID)
+    session.handleBlank(false)
+    const inFlight = session.prompt([{ type: 'text', text: '继续' }], 'queue')
+    expect(session.getSnapshot()).toMatchObject({ blank: false, promptAttempted: true, awaitingFirstTurn: false })
+    expect((await inFlight).ok).toBe(true)
+    expect(session.getSnapshot()).toMatchObject({ blank: false, awaitingFirstTurn: false })
+  })
+
+  it('keeps an accepted first prompt converted when a later prompt is rejected', async ({ mock, start }) => {
+    const session = await sessionBench(mock, start, SID)
+    session.handleBlank(true)
+    expect((await session.prompt([{ type: 'text', text: '第一次' }], 'queue')).ok).toBe(true)
+    session.handleRunning(true)
+    session.handleRunning(false)
+    mock.remote.session.prompt.mockResolvedValue(err(new RemoteError('session/agent-busy', 'busy', { reason: 'x' })))
+
+    expect((await session.prompt([{ type: 'text', text: '第二次' }], 'queue')).ok).toBe(false)
+    expect(session.getSnapshot()).toMatchObject({
+      blank: false, running: false, awaitingFirstTurn: false,
+      promptError: { op: 'send', error: { code: 'session/agent-busy' } },
+    })
+  })
+
   it('keeps the attempted-first-prompt state when the Host rejects the prompt', async ({ mock, start }) => {
     const session = await sessionBench(mock, start, SID)
     session.handleBlank(true)

patches/@yao-pkg__pkg@6.21.0.patch

@@ -1,8 +1,56 @@
 diff --git a/prelude/sea-bootstrap.bundle.js b/prelude/sea-bootstrap.bundle.js
-index ac14980e953134f2285e326a5111cf52de717cf5..19465f8004dcd7f75bc7459de2055546f232fd23 100644
+index ac14980e953134f2285e326a5111cf52de717cf5..1b1c00d1274cba5f63487898a9d940e8870f4f19 100644
 --- a/prelude/sea-bootstrap.bundle.js
 +++ b/prelude/sea-bootstrap.bundle.js
-@@ -5356,6 +5356,39 @@ var require_sea_vfs_setup = __commonJS({
+@@ -63,6 +63,25 @@ var require_bootstrap_shared = __commonJS({
+           throw new Error("pkg: unknown compression codec id " + compression);
+       }
+     }
++    // Write `content` to `dest` through a same-directory temporary file and an
++    // atomic rename, so a concurrent process never observes a partially written
++    // addon: its existsSync/hash check and dlopen see either no file or a complete
++    // one. A direct writeFileSync truncates a file another process may already
++    // have mapped (SIGBUS on Linux, "Library not loaded" on macOS) and exposes the
++    // half-written bytes to that process's hash comparison.
++    function writeFileAtomic(dest, content) {
++      var tmp = dest + "." + process.pid + "." + Math.random().toString(36).slice(2) + ".tmp";
++      fs.writeFileSync(tmp, content);
++      try {
++        fs.renameSync(tmp, dest);
++      } catch (e) {
++        try {
++          fs.unlinkSync(tmp);
++        } catch (_) {
++        }
++        throw e;
++      }
++    }
+     function cpRecursive(src, dest) {
+       var st = fs.lstatSync(src);
+       if (st.isSymbolicLink()) {
+@@ -100,7 +119,7 @@ var require_bootstrap_shared = __commonJS({
+           return;
+         }
+       }
+-      fs.writeFileSync(dest, srcContent);
++      writeFileAtomic(dest, srcContent);
+     }
+     function patchDlopen(insideSnapshot) {
+       var ancestor = process.dlopen;
+@@ -134,10 +153,10 @@ var require_bootstrap_shared = __commonJS({
+               var dContent = fs.readFileSync(tmpModulePath);
+               var dHash = createHash("sha256").update(dContent).digest("hex");
+               if (hash !== dHash) {
+-                fs.writeFileSync(tmpModulePath, moduleContent);
++                writeFileAtomic(tmpModulePath, moduleContent);
+               }
+             } else {
+-              fs.writeFileSync(tmpModulePath, moduleContent);
++              writeFileAtomic(tmpModulePath, moduleContent);
+             }
+             newPath = tmpModulePath;
+           }
+@@ -5356,6 +5375,39 @@ var require_sea_vfs_setup = __commonJS({
          }
        };
      }
@@ -42,7 +90,7 @@ index ac14980e953134f2285e326a5111cf52de717cf5..19465f8004dcd7f75bc7459de2055546
      var SEAProvider = class extends MemoryProvider {
        constructor(seaManifest) {
          super();
-@@ -5465,12 +5498,21 @@ var require_sea_vfs_setup = __commonJS({
+@@ -5465,12 +5517,21 @@ var require_sea_vfs_setup = __commonJS({
          }
          return -2;
        }
@@ -67,7 +115,7 @@ index ac14980e953134f2285e326a5111cf52de717cf5..19465f8004dcd7f75bc7459de2055546
        }
        existsSync(filePath) {
          perf2.count("existsSync calls");
-@@ -5542,7 +5584,7 @@ var require_sea_vfs_setup = __commonJS({
+@@ -5542,7 +5603,7 @@ var require_sea_vfs_setup = __commonJS({
  var require_worker_bootstrap_string = __commonJS({
    "prelude/_worker-bootstrap-string.js"(exports2, module2) {
      "use strict";
@@ -76,7 +124,7 @@ index ac14980e953134f2285e326a5111cf52de717cf5..19465f8004dcd7f75bc7459de2055546
    }
  });
 
-@@ -5560,7 +5602,6 @@ var require_sea_bootstrap_core = __commonJS({
+@@ -5560,7 +5621,6 @@ var require_sea_bootstrap_core = __commonJS({
      var insideSnapshot = vfs.insideSnapshot;
      var SNAPSHOT_PREFIX = vfs.SNAPSHOT_PREFIX;
      shared.patchDlopen(insideSnapshot);

pnpm-lock.yaml

@@ -11,7 +11,7 @@ overrides:
 
 patchedDependencies:
   '@electron/[email protected]': 280e7b2816caf01423097d24e79107a66afeb563a348630ce9928ae8499a5861
-  '@yao-pkg/[email protected]': 07f08c630d0d3886d81fd4600116d07e4871ddcd57f92cb22746b6d246cdc337
+  '@yao-pkg/[email protected]': 75891fc22b277c145cafeab83e41baf4a70f5b8fe6dc0801c6a0b922d7ee88c7
   [email protected]: b40ae545608897914bd25fb009c97eeac478c34e8a910298ddcb01b746534bb0
 
 importers:
@@ -86,7 +86,7 @@ importers:
         version: 4.1.8([email protected])
       '@yao-pkg/pkg':
         specifier: 6.21.0
-        version: 6.21.0(patch_hash=07f08c630d0d3886d81fd4600116d07e4871ddcd57f92cb22746b6d246cdc337)([email protected])
+        version: 6.21.0(patch_hash=75891fc22b277c145cafeab83e41baf4a70f5b8fe6dc0801c6a0b922d7ee88c7)([email protected])
       '@yarnpkg/cli-dist':
         specifier: 4.17.1
         version: 4.17.1
@@ -23016,7 +23016,7 @@ snapshots:
       - bare-buffer
       - react-native-b4a
 
-  '@yao-pkg/[email protected](patch_hash=07f08c630d0d3886d81fd4600116d07e4871ddcd57f92cb22746b6d246cdc337)([email protected])':
+  '@yao-pkg/[email protected](patch_hash=75891fc22b277c145cafeab83e41baf4a70f5b8fe6dc0801c6a0b922d7ee88c7)([email protected])':
     dependencies:
       '@babel/generator': 7.29.7
       '@babel/parser': 7.29.7

snapshots/web/fresh-round-trip/accepted-reconnect.expected.md

@@ -0,0 +1,6 @@
+selected sidebar rows: 1
+new-session labels: 0
+row draggable: true
+host history blank: true
+composer: ""
+contenteditable: true