diff --git a/.agents/notes/implemented/architecture/2026-07-19-package-invariant-runtime-contracts.i18n.yaml b/.agents/notes/implemented/architecture/2026-07-19-package-invariant-runtime-contracts.i18n.yaml
index e897122368..e292482740 100644
--- a/.agents/notes/implemented/architecture/2026-07-19-package-invariant-runtime-contracts.i18n.yaml
+++ b/.agents/notes/implemented/architecture/2026-07-19-package-invariant-runtime-contracts.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/2026-07-19-package-invariant-runtime-contracts.md
-2026-07-19-package-invariant-runtime-contracts.md: 40d152b2320ac65f9ea7d8732b1a667236d2780a
-2026-07-19-package-invariant-runtime-contracts.zh.md: a734b1a3deb739c214d1c4c2565fc697b5e4b89b
+2026-07-19-package-invariant-runtime-contracts.md: 86d86f69b606c348e85d1ae654b6b35c4326985a
+2026-07-19-package-invariant-runtime-contracts.zh.md: 386a294b577561d08493a3b2925910ee5ba971b4
diff --git a/.agents/notes/implemented/feature/2026-06-29-todo-write-tool.i18n.yaml b/.agents/notes/implemented/feature/2026-06-29-todo-write-tool.i18n.yaml
index 0875df143d..5ea74ca411 100644
--- a/.agents/notes/implemented/feature/2026-06-29-todo-write-tool.i18n.yaml
+++ b/.agents/notes/implemented/feature/2026-06-29-todo-write-tool.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/feature/2026-06-29-todo-write-tool.md
-2026-06-29-todo-write-tool.md: 288932f641a37c13ea6beeb069ac360c4a8447c1
-2026-06-29-todo-write-tool.zh.md: 2eced2e1670c20726989137d441d1c78df289641
+2026-06-29-todo-write-tool.md: c4cf64b7876bd8b80df80fe6fc27005715f96b5e
+2026-06-29-todo-write-tool.zh.md: 1f797c5517df8affd66addecf2a8db43c1da3332
diff --git a/.agents/notes/implemented/feature/2026-07-23-web-todo-display.i18n.yaml b/.agents/notes/implemented/feature/2026-07-23-web-todo-display.i18n.yaml
index 54113fb166..2c373a574c 100644
--- a/.agents/notes/implemented/feature/2026-07-23-web-todo-display.i18n.yaml
+++ b/.agents/notes/implemented/feature/2026-07-23-web-todo-display.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/feature/2026-07-23-web-todo-display.md
-2026-07-23-web-todo-display.md: 7223ff9adbf1fa6dca39c9eb4949b6d3861bdd6d
-2026-07-23-web-todo-display.zh.md: 98390c8c2cd95be9d5565b4062d00c1d99215cea
+2026-07-23-web-todo-display.md: e89974e08764faaea0b34ac3319d7793dabd9faf
+2026-07-23-web-todo-display.zh.md: 99335705359df13b7bdc1d1ecab352dea3f443e8
diff --git a/.agents/notes/implemented/feature/2026-07-26-todo-parallel-in-progress.i18n.yaml b/.agents/notes/implemented/feature/2026-07-26-todo-parallel-in-progress.i18n.yaml
index bc033f76b3..65deab6f74 100644
--- a/.agents/notes/implemented/feature/2026-07-26-todo-parallel-in-progress.i18n.yaml
+++ b/.agents/notes/implemented/feature/2026-07-26-todo-parallel-in-progress.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/feature/2026-07-26-todo-parallel-in-progress.md
-2026-07-26-todo-parallel-in-progress.md: a023338704337c5ad2a76a5eaf7ac64a3e949e52
-2026-07-26-todo-parallel-in-progress.zh.md: 163cec20811fcfe756dbf294d152597dade69af6
+2026-07-26-todo-parallel-in-progress.md: 170c0d205a95b0668e8da0997a04849aae2bd59e
+2026-07-26-todo-parallel-in-progress.zh.md: 2ff13750bb2f19acccd09ffdd6d4937729e63803
diff --git a/.agents/notes/implemented/feature/2026-07-26-todo-parallel-in-progress.md b/.agents/notes/implemented/feature/2026-07-26-todo-parallel-in-progress.md
index a023338704..170c0d205a 100644
--- a/.agents/notes/implemented/feature/2026-07-26-todo-parallel-in-progress.md
+++ b/.agents/notes/implemented/feature/2026-07-26-todo-parallel-in-progress.md
@@ -41,10 +41,10 @@ Lifting the cap makes a list shape reachable that no renderer had ever received,
 
 The row takes `planSummary` in `toolviews/plan-summary.ts`. It names the first active item and counts the rest, so the row reports how many tasks are running instead of implying one. Naming every active item was rejected: the row is a single line, and an unbounded join would overflow it — the count degrades predictably where a list does not. The derivation sits inside the toolviews domain rather than in `contract/`, the inter-domain face: the panel computes its own counts inline and shares nothing with the row, so a contract module would declare a sharing relationship that no longer exists.
 
-`planSummary` returns the name and the count as separate fields rather than one joined string, because the row truncates its summary with `overflow: hidden` / `text-overflow: ellipsis`. A count appended to the task name sits at the far end of the truncatable text, so exactly the narrow viewports and long task names that make the count informative are the ones that clip it away, leaving a parallel plan indistinguishable from a sequential one. The row therefore renders the count in its own `flex: none` span beside the ellipsized text; a pre-joined string could not express that split, and pushing the count in front of the name was rejected because the task name is what the reader is looking for first.
+`planSummary` returns the name and the count as separate fields rather than one joined string, because the row truncates its summary with `overflow: hidden` / `text-overflow: ellipsis`. A count appended to the task name sits at the far end of the truncatable text, so exactly the narrow viewports and long task names that make the count informative are the ones that clip it away, leaving a parallel plan indistinguishable from a sequential one. The row therefore hands the count to the shared `ToolRow` as `summarySuffix`, a non-shrinking slot beside the ellipsized summary text; a pre-joined string could not express that split, and pushing the count in front of the name was rejected because the task name is what the reader is looking for first.
 
-Splitting the count into its own span puts it outside the `.summary` rule, so it also has to repeat that rule's `font-size` and `line-height`. The web shell leaves body text at the browser default rather than the row's 14px, so an unstyled span renders visibly larger than the text it sits beside on a 24px row. Inheriting from a shared parent was the alternative; repeating two declarations keeps the split spans independent, which is the property the ellipsis boundary needs.
+`summarySuffix` is a slot on `ToolRow` rather than markup owned by the todo row: every toolview renders through that shared component, whose `summary` is a plain ellipsized string with no place for a fragment that must survive the clip. Sitting outside the `.summary` rule, the suffix repeats that rule's `font-size` and `line-height` — the web shell leaves body text at the browser default rather than the row's 14px, so an unstyled span renders visibly larger than the text beside it on a 24px row. An error row drops the suffix, because its collapsed summary is the failure line rather than anything derived from the call args.
 
 ## Consequences
 
-A todo list can now faithfully mirror parallel execution, and every UI renders several active markers at once: the TUI's per-status prefix needed no change, the plan strip's header counts the active items, and the row needed the derivation above. A composition that sets `allowParallelInProgress: true` no longer rejects a formerly-invalid snapshot shape; one that sets `false` keeps the old rejection, and the durable-log invariant accepts both. The model-facing description changed, which re-recorded the tool-catalog page and every `tool-schemas.expected.json` sidecar carrying the todo schema (seven of the eight in the tree). Scenarios composing an identical header share one sidecar through `toolSchemasSource` rather than each keeping a copy, so the count tracks distinct header compositions, not scenarios; a branch changing the tool description still has to refresh whichever sidecars landed after it branched — `pnpm run test:snapshot:refresh` does it keylessly. The web fixture's todo sample now runs two items `in_progress`, so the assembled web transcript replays a parallel plan and would fail again if either surface returned to single-active derivation.
+A todo list can now faithfully mirror parallel execution, and every UI renders several active markers at once: the TUI's per-status prefix needed no change, the plan strip's header counts the active items, and the row needed the derivation above. A composition that sets `allowParallelInProgress: true` no longer rejects a formerly-invalid snapshot shape; one that sets `false` keeps the old rejection, and the durable-log invariant accepts both. The model-facing description changed, which re-recorded the tool-catalog page and every `tool-schemas.expected.json` sidecar carrying the todo schema (seven of the eight in the tree). Scenarios composing an identical header share one sidecar through `toolSchemasSource` rather than each keeping a copy, so the count tracks distinct header compositions, not scenarios; a branch changing the tool description still has to refresh whichever sidecars landed after it branched — `pnpm run test:snapshot:refresh` does it keylessly. The web fixture's todo sample now runs two items `in_progress`, so both fixture-driven surfaces render a parallel plan — `packages/client/ui-conversation/tests/todo-panel.spec.tsx` pins the row summary and the plan strip, and the ACP `todo-write` scenario records a three-todo plan with two active — and each would fail again if its derivation returned to single-active.
diff --git a/.agents/notes/implemented/feature/2026-07-26-todo-parallel-in-progress.zh.md b/.agents/notes/implemented/feature/2026-07-26-todo-parallel-in-progress.zh.md
index 163cec2081..2ff13750bb 100644
--- a/.agents/notes/implemented/feature/2026-07-26-todo-parallel-in-progress.zh.md
+++ b/.agents/notes/implemented/feature/2026-07-26-todo-parallel-in-progress.zh.md
@@ -41,10 +41,10 @@ Status: implemented
 
 工具行改用 `toolviews/plan-summary.ts` 中的 `planSummary`。它给出第一个活跃条目，并计数其余活跃项，因此工具行报告的是有多少任务在跑，而不是暗示只有一个。列出全部活跃条目被否决了：工具行是单行，无上界的拼接会溢出——在列表做不到的地方，计数能够可预测地降级。该推导放在 toolviews 域内而非 `contract/`（域间共享面）：面板自行内联计算其计数，与工具行不共享任何东西，因此放进 contract 会声明一种已不存在的共享关系。
 
-`planSummary` 把任务名与计数作为两个独立字段返回，而不是一个拼好的字符串，因为工具行用 `overflow: hidden` / `text-overflow: ellipsis` 截断其摘要文本。计数接在任务名之后时位于可截断文本的末端，于是恰恰是让计数变得有意义的那些场景——窄视口、长任务名——会把它裁掉，让并行计划看起来与顺序计划无异。因此工具行把计数渲染在自己的 `flex: none` span 中，与被省略号截断的文本并列；一个预先拼好的字符串无法表达这个切分，而把计数放到任务名之前也被否决了：读者首先要找的是任务名。
+`planSummary` 把任务名与计数作为两个独立字段返回，而不是一个拼好的字符串，因为工具行用 `overflow: hidden` / `text-overflow: ellipsis` 截断其摘要文本。计数接在任务名之后时位于可截断文本的末端，于是恰恰是让计数变得有意义的那些场景——窄视口、长任务名——会把它裁掉，让并行计划看起来与顺序计划无异。因此工具行把计数交给共享的 `ToolRow`，作为 `summarySuffix`——一个紧邻被省略号截断的摘要文本、且不会收缩的槽位；一个预先拼好的字符串无法表达这个切分，而把计数放到任务名之前也被否决了：读者首先要找的是任务名。
 
-把计数拆进独立 span 也意味着它落在 `.summary` 规则之外，因此必须重复该规则的 `font-size` 与 `line-height`。Web 外壳把正文字号留在浏览器默认值而非该行的 14px，所以未加样式的 span 会明显大于同一 24px 行内与之并列的文本。另一个方案是从共同父元素继承；重复这两条声明让被拆开的两个 span 保持互不影响，而这正是省略号边界所需要的性质。
+`summarySuffix` 是 `ToolRow` 上的槽位，而不是 todo 工具行自有的标记：每个 toolview 都经由这个共享组件渲染，而它的 `summary` 是一个会被省略号截断的普通字符串，容不下一个必须挺过截断的片段。该后缀落在 `.summary` 规则之外，因此重复了该规则的 `font-size` 与 `line-height`——Web 外壳把正文字号留在浏览器默认值而非该行的 14px，所以未加样式的 span 会明显大于同一 24px 行内与之并列的文本。错误行会丢弃该后缀，因为它折叠态的摘要是失败行，而非任何由调用 args 推导出的内容。
 
 ## 后果
 
-现在 todo 列表可以忠实反映并行执行，并且每个 UI 都能一次渲染多个活跃标记：TUI 按状态区分的前缀无需改动，计划横条的表头会计数活跃条目，工具行则需要上述推导。设置 `allowParallelInProgress: true` 的组合不再拒绝一种此前无效的快照形状；设置为 `false` 的组合仍保留旧的拒绝行为，而持久日志不变式两者都接受。面向模型的描述发生了变化，这重新记录了 tool-catalog 页面以及每个带有 todo schema 的 `tool-schemas.expected.json` sidecar（树中八个里有七个）。组合出相同 header 的场景通过 `toolSchemasSource` 共用同一份 sidecar，而非各自保留副本，因此这个数量对应的是不同的 header 组合，而不是场景数；改动工具描述的分支仍须刷新它分叉之后落地的那些 sidecar —— `pnpm run test:snapshot:refresh` 可以无 key 完成。web fixture 的 todo 样本现在有两个条目处于 `in_progress`，因此组装后的 web transcript 回放的是一个并行计划；若任一展示面退回单活跃项推导，它会再次失败。
+现在 todo 列表可以忠实反映并行执行，并且每个 UI 都能一次渲染多个活跃标记：TUI 按状态区分的前缀无需改动，计划横条的表头会计数活跃条目，工具行则需要上述推导。设置 `allowParallelInProgress: true` 的组合不再拒绝一种此前无效的快照形状；设置为 `false` 的组合仍保留旧的拒绝行为，而持久日志不变式两者都接受。面向模型的描述发生了变化，这重新记录了 tool-catalog 页面以及每个带有 todo schema 的 `tool-schemas.expected.json` sidecar（树中八个里有七个）。组合出相同 header 的场景通过 `toolSchemasSource` 共用同一份 sidecar，而非各自保留副本，因此这个数量对应的是不同的 header 组合，而不是场景数；改动工具描述的分支仍须刷新它分叉之后落地的那些 sidecar —— `pnpm run test:snapshot:refresh` 可以无 key 完成。web fixture 的 todo 样本现在有两个条目处于 `in_progress`，因此两个由 fixture 驱动的展示面渲染的都是并行计划——`packages/client/ui-conversation/tests/todo-panel.spec.tsx` 固定工具行摘要与计划横条，ACP `todo-write` 场景录制的是三条目、两个活跃的计划——任一推导退回单活跃项，对应的测试都会失败。
diff --git a/docs/config-catalog.md b/docs/config-catalog.md
index 948999e161..79e35d8f3a 100644
--- a/docs/config-catalog.md
+++ b/docs/config-catalog.md
@@ -2038,6 +2038,26 @@ export interface Config {
 
 Source: [`packages/tasks/tool-tasks/src/index.ts:23`](../packages/tasks/tool-tasks/src/index.ts)
 
+## `@deepseek-ai/dsh-tool-todo`
+
+Requires: `tools`
+
+```ts config-catalog
+/** Model-facing todo tool configuration. */
+export interface Config {
+  /**
+   * Required deployment choice for whether several todos may be `in_progress` at once. True suits
+   * agents that run work concurrently — subagents, background commands, workflow fan-out — and the
+   * description then instructs the model to mark every actively worked task. False restores the
+   * single-active discipline: the description asks for exactly one, and a call marking more is
+   * rejected.
+   */
+  allowParallelInProgress: boolean
+}
+```
+
+Source: [`packages/todo/tool-todo/src/index.ts:29`](../packages/todo/tool-todo/src/index.ts)
+
 ## `@deepseek-ai/dsh-tool-web`
 
 Requires: `tools` · `web` · `systemPrompt`
@@ -2367,7 +2387,6 @@ These load from a `cordis.yml` entry with no `config:` block; they declare no co
 - `@deepseek-ai/dsh-timeout-policy` — requires `tools` ([`packages/timeout/timeout-policy/src/index.ts`](../packages/timeout/timeout-policy/src/index.ts))
 - `@deepseek-ai/dsh-tool-ask-user` — requires `tools` · `userInteraction` ([`packages/ui/tool-ask-user/src/index.ts`](../packages/ui/tool-ask-user/src/index.ts))
 - `@deepseek-ai/dsh-tool-subagent-control` — requires `tools` · `subagents` ([`packages/subagent/tool-subagent-control/src/index.ts`](../packages/subagent/tool-subagent-control/src/index.ts))
-- `@deepseek-ai/dsh-tool-todo` — requires `tools` ([`packages/todo/tool-todo/src/index.ts`](../packages/todo/tool-todo/src/index.ts))
 - `@deepseek-ai/dsh-typert-registry` ([`packages/typert/registry/src/index.ts`](../packages/typert/registry/src/index.ts))
 - `@deepseek-ai/dsh-user-interaction` ([`packages/ui/user-interaction/src/index.ts`](../packages/ui/user-interaction/src/index.ts))
 - `@deepseek-ai/dsh-workspace` — requires `storageDomain` · `sessionPersistence` ([`packages/workspace/workspace/src/index.ts`](../packages/workspace/workspace/src/index.ts))
diff --git a/docs/core-data-structures/session.i18n.yaml b/docs/core-data-structures/session.i18n.yaml
index 565f7275f6..5f645078a2 100644
--- a/docs/core-data-structures/session.i18n.yaml
+++ b/docs/core-data-structures/session.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 docs/core-data-structures/session.md
-session.md: 30f9d7a92f36b0649ec6d61bb3e69a80b125cc73
-session.zh.md: 80762f097bad5f6ab81f3872df5c8b715109241f
+session.md: 525703f1494945f23d0e33e06c9cbe7dbabe1c91
+session.zh.md: 6586d7df48aed1701998c01e19b403325f29220f
diff --git a/examples/acp-agent/tests/snapshots/todo-write/session.jsonl b/examples/acp-agent/tests/snapshots/todo-write/session.jsonl
index 32a6ab449c..acd66fe881 100644
--- a/examples/acp-agent/tests/snapshots/todo-write/session.jsonl
+++ b/examples/acp-agent/tests/snapshots/todo-write/session.jsonl
@@ -1,36 +1,37 @@
-{"type":"session","version":0,"id":"b0f1f758-dcf0-474e-851d-e62c11ec0a09","createdAt":1783352057652,"cwd":"{{cwd}}","delegationDepth":0}
-{"type":"agent/inbox/spliced","seq":0,"time":1785498772484,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Use the todo_write tool to record a plan with exactly three todos: \"read the code\" (in_progress), \"write the fix\" (pending), \"run the tests\" (pending). Send all three in one todo_write call. Then reply with the single word DONE and stop."}],"source":{"kind":"user"},"role":"user","id":"5ecf5e4b-6a18-447d-9341-48f38afdd12e"}]}}
-{"type":"turn/start","seq":1,"time":1785821376741,"data":{"turn":1}}
-{"type":"agent/inbox/spliced","seq":2,"time":1785821376741,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
-{"type":"step/start","seq":3,"time":1783352057657,"data":{"turn":1,"step":1}}
-{"type":"user/message","seq":4,"time":1785498772510,"data":{"content":[{"type":"text","text":"Use the todo_write tool to record a plan with exactly three todos: \"read the code\" (in_progress), \"write the fix\" (pending), \"run the tests\" (pending). Send all three in one todo_write call. Then reply with the single word DONE and stop."}],"source":{"kind":"user"},"role":"user","id":"5ecf5e4b-6a18-447d-9341-48f38afdd12e"},"surfaceOp":"append"}
-{"type":"user/message","seq":5,"time":1785730425725,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: danger-full-access. The DSH file sandbox does not restrict file modifications by available operations.\n\nApproval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`)."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"8d4ac045-8016-4cec-8b12-91d9459231e1"},"surfaceOp":"append"}
-{"type":"session/title","seq":6,"time":1785730425725,"data":{"title":"Use the todo_write tool to","messageSeqs":[4],"source":{"kind":"fallback"}}}
-{"type":"request/header","seq":7,"time":1785498772511,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
-{"type":"request/context","seq":8,"time":1785730425726,"data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
-{"type":"assistant/chunk","seq":9,"time":1783352058426,"data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"reasoning"}}}
-{"type":"reasoning-chunks","seq0":10,"time0":1783352058466,"data":{"turn":1,"step":1,"index":0,"dt":[1,0,0,0,17,0,0,0,1,26,1,1,0,0,1,26,0,31,1,25,0,0,0,29,0,0,0,0,91,0],"texts":["The"," user"," wants"," me"," to"," use"," the"," todo","_write"," tool"," to"," record"," a"," plan"," with"," exactly"," three"," todos"," in"," the"," specified"," status","es",","," then"," reply"," with"," \"","D","ONE","\"."]}}
-{"type":"assistant/chunk","seq":41,"time":1783352058746,"data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":1,"blockType":"tool-call"}}}
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-{"type":"turn/end","seq":137,"time":1785730425764,"data":{"turn":1,"reason":{"kind":"completed"}}}
+{"type":"session","version":0,"id":"d9d967e8-0112-471c-a3b5-dfdc171aba61","createdAt":1785987077399,"cwd":"{{cwd}}","delegationDepth":0}
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+{"type":"step/start","seq":3,"time":1785987077430,"data":{"turn":1,"step":1}}
+{"type":"user/message","seq":4,"time":1785987077430,"data":{"content":[{"type":"text","text":"Use the todo_write tool to record a plan with exactly three todos for work running in parallel: \"read the code\" (in_progress), \"watch the background build\" (in_progress), \"write the fix\" (pending). Send all three in one todo_write call. Then reply with the single word DONE and stop."}],"source":{"kind":"user"},"role":"user","id":"befb10e9-f992-4a19-9e1b-333ad7fd72f8"},"surfaceOp":"append"}
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diff --git a/packages/client/ui-conversation/README.i18n.yaml b/packages/client/ui-conversation/README.i18n.yaml
index 6ea6e71769..97e4c2b945 100644
--- a/packages/client/ui-conversation/README.i18n.yaml
+++ b/packages/client/ui-conversation/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/client/ui-conversation/README.md
-README.md: 4869fa4df929027f031082deb04cc1ab3d18921c
-README.zh.md: 5c3091efa11b65f43ea5ea3037a60d0aa1bafbda
+README.md: 6a541f0599ef9c46a30df2d5a9d31e3dac96bdb1
+README.zh.md: 842c576f8396fef05ed45be4379ff04f90d448a0
diff --git a/packages/client/ui-conversation/tests/chat-tool-row.spec.tsx b/packages/client/ui-conversation/tests/chat-tool-row.spec.tsx
index 810a810fbb..246c79950d 100644
--- a/packages/client/ui-conversation/tests/chat-tool-row.spec.tsx
+++ b/packages/client/ui-conversation/tests/chat-tool-row.spec.tsx
@@ -301,6 +301,20 @@ describe('ToolRow', () => {
     expect(view.getByText('List files')).toBeTruthy()
   })
 
+  it('renders summarySuffix outside the ellipsized summary span, and drops it on a failure line', () => {
+    const view = render(<ToolRow {...rowProps} summarySuffix="+2" />)
+    const summary = view.getByText('List files')
+    const suffix = view.getByText('+2')
+    // Separate spans: .summary truncates, the suffix must not travel inside it.
+    expect(summary.contains(suffix)).toBe(false)
+    view.unmount()
+    // The failure line replaces the summary wholesale, so the suffix goes with it.
+    const failed = render(
+      <ToolRow {...rowProps} state="error" errorSummary="boom" summarySuffix="+2" />,
+    )
+    expect(failed.queryByText('+2')).toBeNull()
+  })
+
   it('an error file row drops the open-file link (the summary is failure prose, not the path)', () => {
     const open = vi.fn()
     const view = render(
diff --git a/packages/todo/tool-todo/README.i18n.yaml b/packages/todo/tool-todo/README.i18n.yaml
index e0a1a5ea25..20b8dffbbf 100644
--- a/packages/todo/tool-todo/README.i18n.yaml
+++ b/packages/todo/tool-todo/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/todo/tool-todo/README.md
-README.md: 456d4a08d88b145d574362ffa0874faef9167b22
-README.zh.md: ec37682773e50c3f153525f6c2b6b6cce583144f
+README.md: 914e89a000e4bb87ebd7844f05db3809c6726528
+README.zh.md: c88dbf976fa5110028fcc964ab9aa8efcc3244d3