[teamleaderleo]

A chat that the Chief or another chat's agent runs now says so over the composer: "claude-sr2-coord is managing this chat [Take over]". It works like ChatGPT's line for a chat its agent runs.

Leo, 2026-11-01, on ChatGPT's "Lumi is managing this task / Take over": "they even show chief-operated chats".

Shows on

• a chat a Chief started (its mux.parent tag is optchat-chief or optchat-chief:<home>): "Chief is managing this chat"
• a sub-session (startedBy) or a chat another agent made (spawnedBy): that chat's title, which opens it
• not on the person's own chats, and not when the manager isn't in the session list

Take over hides the line for that chat on this Mac (local storage, at most 200 chats) and focuses the composer. The person's own prompt already goes in ahead of the manager's next message, and acpmux's pair guard counts it as person input. Holding the manager's later messages until the person hands the chat back belongs in acpmux and is a follow-up.

Files

• managedBy.ts holds the logic, tested in managedBy.test.ts.
• sessionList.ts reads the chiefChild flag from mux.parent.
• ManagedBanner.tsx and managedBanner.css draw the line, using theme tokens, --text-detail and the 4/8/16 spacing scale. The gallery has agent-pane.managed-banner in three variants.
• App.tsx mounts it as a status Notice right above the tray and composer.

Localization: managed.banner and managed.takeOver are added in all 21 pane locales; "Chief" is a product name.

Checks: cmux-ci test (linux-pool job f4a14b5265ea0ecd5fd0145c) ran bun test managedBy.test.ts and the full bun run check (design tokens, type scale, fmt, lint, tsc, catalog keys). All green.

Design: leo-workspace design/group-chat.md (settled rule 6).

Agent session: agent session

🤖 Generated with Claude Code

---

Summary by cubic

Shows who manages a chat the Chief or another agent runs, with a Take over button, like ChatGPT shows a chat its agent runs. A chat a Chief started shows "Chief is managing this chat"; a sub-session or chat another agent started shows that agent's chat name, which opens the managing chat.

Behavior

• Take over hides the line for that chat on this Mac (local storage, capped at 200 chats) and focuses the composer.
• The line appears only when the manager is in the session list, never on the person's own chats.
• Holding the manager's later messages after Take over is a follow-up in acpmux.

^{Written for commit ab77b38. Summary will update on new commits.}

[cubic-dev-ai]

4 issues found across 8 files

Prompt for AI agents (unresolved issues)

Check if these issues are valid — if so, understand the root cause of each and fix them. When an issue isn't valid or won't be fixed in this PR, reply in its thread with the reason and then resolve the thread. If appropriate, use sub-agents to investigate and fix each issue separately.


<file name="webviews/src/agent-session/acpmux/managedBy.test.ts">

<violation number="1" location="webviews/src/agent-session/acpmux/managedBy.test.ts:30">
P2: This assertion never checks the manager’s displayed name, so a regression that returns the wrong or empty title for `spawnedBy` still passes. Assert the complete manager object, including `name: "planner"`.</violation>
</file>

<file name="webviews/src/agent-session/acpmux/Localizable.xcstrings">

<violation number="1" location="webviews/src/agent-session/acpmux/Localizable.xcstrings:5">
P3: The Korean `직접 맡기` means “entrust directly,” not “take over,” and reads as an incomplete button label. Use `인계받기`, matching the existing Korean translation for this action.</violation>
</file>

<file name="webviews/src/agent-session/acpmux/managedBanner.css">

<violation number="1" location="webviews/src/agent-session/acpmux/managedBanner.css:8">
P2: `--agent-page-bg` is transparent in see-through themes, so this button's label becomes transparent against its text-colored background. Use the opaque `--agent-accent-text` token for the button foreground.</violation>
</file>

<file name="webviews/src/agent-session/acpmux/managedBy.ts">

<violation number="1" location="webviews/src/agent-session/acpmux/managedBy.ts:27">
P2: This branch shows the Chief banner from the child tag alone, without confirming that the Chief is present in the session list. A stale or remote child can therefore claim that Chief is managing it when no matching Chief session is listed; retain the Chief home id and require a matching `cmux.chief` entry before returning `{ kind: "chief" }`.</violation>
</file>

<sub>Reply with feedback, questions, or to request a fix.

View guided diff | Turn on auto-fix | Re-trigger cubic</sub>

[cubic-dev-ai]

P2: This assertion never checks the manager’s displayed name, so a regression that returns the wrong or empty title for spawnedBy still passes. Assert the complete manager object, including name: "planner".

Prompt for AI agents

Check if this issue is valid — if so, understand the root cause and fix it. When an issue isn't valid or won't be fixed in this PR, reply in its thread with the reason and then resolve the thread. At webviews/src/agent-session/acpmux/managedBy.test.ts, line 30:

<comment>This assertion never checks the manager’s displayed name, so a regression that returns the wrong or empty title for `spawnedBy` still passes. Assert the complete manager object, including `name: "planner"`.</comment>

<file context>
@@ -0,0 +1,59 @@
+
+test("a chat another agent made is managed by that agent's chat", () => {
+  const sessions = [entry("p", { name: "planner" }), entry("c", { spawnedBy: "p" })];
+  expect(managedBy("c", sessions)).toMatchObject({ kind: "agent", sessionId: "p" });
+});
+
</file context>

[cubic-dev-ai]

P2: --agent-page-bg is transparent in see-through themes, so this button's label becomes transparent against its text-colored background. Use the opaque --agent-accent-text token for the button foreground.

Prompt for AI agents

Check if this issue is valid — if so, understand the root cause and fix it. When an issue isn't valid or won't be fixed in this PR, reply in its thread with the reason and then resolve the thread. At webviews/src/agent-session/acpmux/managedBanner.css, line 8:

<comment>`--agent-page-bg` is transparent in see-through themes, so this button's label becomes transparent against its text-colored background. Use the opaque `--agent-accent-text` token for the button foreground.</comment>

<file context>
@@ -0,0 +1,10 @@
+.acpmux-managed-name{color:var(--agent-text);font-weight:600}
+button.acpmux-managed-name{border:0;padding:0;background:none;font:inherit;font-weight:600;cursor:pointer}
+button.acpmux-managed-name:hover{text-decoration:underline}
+.acpmux-managed-take-over{flex:none;border:0;border-radius:999px;padding:4px 12px;background:var(--agent-text);color:var(--agent-page-bg);font:inherit;font-weight:500;cursor:pointer}
+.acpmux-managed-take-over:hover{background:color-mix(in srgb,var(--agent-text) 86%,var(--agent-page-bg))}
+.acpmux-managed-banner button:focus-visible{outline:2px solid color-mix(in srgb,var(--agent-text) 40%,transparent);outline-offset:2px}
</file context>

Suggested change

	.acpmux-managed-take-over{flex:none;border:0;border-radius:999px;padding:4px 12px;background:var(--agent-text);color:var(--agent-page-bg);font:inherit;font-weight:500;cursor:pointer}
	.acpmux-managed-take-over{flex:none;border:0;border-radius:999px;padding:4px 12px;background:var(--agent-text);color:var(--agent-accent-text);font:inherit;font-weight:500;cursor:pointer}

[cubic-dev-ai]

P2: This branch shows the Chief banner from the child tag alone, without confirming that the Chief is present in the session list. A stale or remote child can therefore claim that Chief is managing it when no matching Chief session is listed; retain the Chief home id and require a matching cmux.chief entry before returning { kind: "chief" }.

Prompt for AI agents

Check if this issue is valid — if so, understand the root cause and fix it. When an issue isn't valid or won't be fixed in this PR, reply in its thread with the reason and then resolve the thread. At webviews/src/agent-session/acpmux/managedBy.ts, line 27:

<comment>This branch shows the Chief banner from the child tag alone, without confirming that the Chief is present in the session list. A stale or remote child can therefore claim that Chief is managing it when no matching Chief session is listed; retain the Chief home id and require a matching `cmux.chief` entry before returning `{ kind: "chief" }`.</comment>

<file context>
@@ -0,0 +1,71 @@
+  if (!sessionId) return undefined;
+  const own = sessions.find((entry) => entry.sessionId === sessionId);
+  if (!own) return undefined;
+  if (own.chiefChild) return { kind: "chief" };
+  const parentId = own.startedBy ?? own.spawnedBy;
+  if (!parentId || parentId === sessionId) return undefined;
</file context>

[cubic-dev-ai]

P3: The Korean 직접 맡기 means “entrust directly,” not “take over,” and reads as an incomplete button label. Use 인계받기, matching the existing Korean translation for this action.

Prompt for AI agents

Check if this issue is valid — if so, understand the root cause and fix it. When an issue isn't valid or won't be fixed in this PR, reply in its thread with the reason and then resolve the thread. At webviews/src/agent-session/acpmux/Localizable.xcstrings, line 5:

<comment>The Korean `직접 맡기` means “entrust directly,” not “take over,” and reads as an incomplete button label. Use `인계받기`, matching the existing Korean translation for this action.</comment>

<file context>
@@ -1,6 +1,8 @@
   "sourceLanguage": "en",
   "strings": {
+    "managed.banner": {"comment":"Agent pane: the line over the composer of a chat the Chief or another chat's agent runs; {name} is that Chief or chat (shown bold)","extractionState":"manual","localizations":{"ar":{"stringUnit":{"state":"needs_review","value":"{name} يدير هذه المحادثة"}},"bs":{"stringUnit":{"state":"needs_review","value":"{name} upravlja ovim razgovorom"}},"da":{"stringUnit":{"state":"needs_review","value":"{name} styrer denne chat"}},"de":{"stringUnit":{"state":"needs_review","value":"{name} führt diesen Chat"}},"en":{"stringUnit":{"state":"translated","value":"{name} is managing this chat"}},"es":{"stringUnit":{"state":"needs_review","value":"{name} gestiona este chat"}},"fr":{"stringUnit":{"state":"needs_review","value":"{name} gère cette discussion"}},"it":{"stringUnit":{"state":"needs_review","value":"{name} gestisce questa chat"}},"ja":{"stringUnit":{"state":"needs_review","value":"{name} がこのチャットを管理しています"}},"km":{"stringUnit":{"state":"needs_review","value":"{name} កំពុងគ្រប់គ្រងការជជែកនេះ"}},"ko":{"stringUnit":{"state":"needs_review","value":"{name}이(가) 이 채팅을 관리하고 있습니다"}},"nb":{"stringUnit":{"state":"needs_review","value":"{name} styrer denne chatten"}},"pl":{"stringUnit":{"state":"needs_review","value":"{name} zarządza tym czatem"}},"pt-BR":{"stringUnit":{"state":"needs_review","value":"{name} está gerenciando este chat"}},"ru":{"stringUnit":{"state":"needs_review","value":"{name} ведёт этот чат"}},"th":{"stringUnit":{"state":"needs_review","value":"{name} กำลังจัดการแชทนี้"}},"tr":{"stringUnit":{"state":"needs_review","value":"{name} bu sohbeti yönetiyor"}},"uk":{"stringUnit":{"state":"needs_review","value":"{name} веде цей чат"}},"vi":{"stringUnit":{"state":"needs_review","value":"{name} đang quản lý cuộc trò chuyện này"}},"zh-Hans":{"stringUnit":{"state":"needs_review","value":"{name} 正在管理此聊天"}},"zh-Hant":{"stringUnit":{"state":"needs_review","value":"{name} 正在管理此聊天"}}}},
+    "managed.takeOver": {"comment":"Agent pane: the button beside 'X is managing this chat' that hands the chat to the person","extractionState":"manual","localizations":{"ar":{"stringUnit":{"state":"needs_review","value":"تولَّ الأمر"}},"bs":{"stringUnit":{"state":"needs_review","value":"Preuzmi"}},"da":{"stringUnit":{"state":"needs_review","value":"Overtag"}},"de":{"stringUnit":{"state":"needs_review","value":"Übernehmen"}},"en":{"stringUnit":{"state":"translated","value":"Take over"}},"es":{"stringUnit":{"state":"needs_review","value":"Tomar el control"}},"fr":{"stringUnit":{"state":"needs_review","value":"Reprendre la main"}},"it":{"stringUnit":{"state":"needs_review","value":"Prendi il controllo"}},"ja":{"stringUnit":{"state":"needs_review","value":"引き継ぐ"}},"km":{"stringUnit":{"state":"needs_review","value":"យកមកគ្រប់គ្រង"}},"ko":{"stringUnit":{"state":"needs_review","value":"직접 맡기"}},"nb":{"stringUnit":{"state":"needs_review","value":"Ta over"}},"pl":{"stringUnit":{"state":"needs_review","value":"Przejmij"}},"pt-BR":{"stringUnit":{"state":"needs_review","value":"Assumir"}},"ru":{"stringUnit":{"state":"needs_review","value":"Взять на себя"}},"th":{"stringUnit":{"state":"needs_review","value":"รับช่วงต่อ"}},"tr":{"stringUnit":{"state":"needs_review","value":"Devral"}},"uk":{"stringUnit":{"state":"needs_review","value":"Перейняти"}},"vi":{"stringUnit":{"state":"needs_review","value":"Tiếp quản"}},"zh-Hans":{"stringUnit":{"state":"needs_review","value":"接管"}},"zh-Hant":{"stringUnit":{"state":"needs_review","value":"接管"}}}},
     "prompt.failure.tooLarge": {"comment":"Agent pane: under a prompt refused because it was larger than one message can carry (inline attachments); Retry is not offered, Edit is","extractionState":"manual","localizations":{"en":{"stringUnit":{"state":"translated","value":"Not sent: this message is too large to send at once. Take out an attachment with Edit, or send the attachments in separate messages."}},"ar":{"stringUnit":{"state":"needs_review","value":"لم تُرسَل: هذه الرسالة أكبر من أن تُرسَل دفعة واحدة. أزِل مرفقًا عبر «تعديل»، أو أرسل المرفقات في رسائل منفصلة."}},"bs":{"stringUnit":{"state":"needs_review","value":"Nije poslano: ova poruka je prevelika da bi se poslala odjednom. Uklonite prilog pomoću Uredi ili pošaljite priloge u zasebnim porukama."}},"da":{"stringUnit":{"state":"needs_review","value":"Ikke sendt: denne besked er for stor til at blive sendt på én gang. Fjern en vedhæftning med Rediger, eller send vedhæftningerne i separate beskeder."}},"de":{"stringUnit":{"state":"needs_review","value":"Nicht gesendet: Diese Nachricht ist zu groß, um auf einmal gesendet zu werden. Entferne mit Bearbeiten einen Anhang oder sende die Anhänge in getrennten Nachrichten."}},"es":{"stringUnit":{"state":"needs_review","value":"No enviado: este mensaje es demasiado grande para enviarlo de una vez. Quita un adjunto con Editar o envía los adjuntos en mensajes separados."}},"fr":{"stringUnit":{"state":"needs_review","value":"Non envoyé : ce message est trop volumineux pour être envoyé en une fois. Retirez une pièce jointe avec Modifier, ou envoyez les pièces jointes dans des messages séparés."}},"it":{"stringUnit":{"state":"needs_review","value":"Non inviato: questo messaggio è troppo grande per essere inviato in una volta. Rimuovi un allegato con Modifica o invia gli allegati in messaggi separati."}},"ja":{"stringUnit":{"state":"needs_review","value":"未送信：このメッセージは一度に送信するには大きすぎます。「編集」で添付ファイルを外すか、添付ファイルを別々のメッセージで送信してください。"}},"km":{"stringUnit":{"state":"needs_review","value":"មិនបានផ្ញើ៖ សារនេះធំពេកមិនអាចផ្ញើក្នុងពេលតែមួយបានទេ។ ដកឯកសារភ្ជាប់មួយចេញដោយប្រើ កែសម្រួល ឬផ្ញើឯកសារភ្ជាប់ក្នុងសារដាច់ដោយឡែក។"}},"ko":{"stringUnit":{"state":"needs_review","value":"보내지 않음: 이 메시지는 한 번에 보내기에 너무 큽니다. 편집으로 첨부 파일을 빼거나 첨부 파일을 별도의 메시지로 보내세요."}},"nb":{"stringUnit":{"state":"needs_review","value":"Ikke sendt: denne meldingen er for stor til å sendes på én gang. Fjern et vedlegg med Rediger, eller send vedleggene i separate meldinger."}},"pl":{"stringUnit":{"state":"needs_review","value":"Nie wysłano: ta wiadomość jest za duża, by wysłać ją naraz. Usuń załącznik przez Edytuj albo wyślij załączniki w osobnych wiadomościach."}},"pt-BR":{"stringUnit":{"state":"needs_review","value":"Não enviada: esta mensagem é grande demais para ser enviada de uma vez. Remova um anexo com Editar ou envie os anexos em mensagens separadas."}},"ru":{"stringUnit":{"state":"needs_review","value":"Не отправлено: это сообщение слишком велико, чтобы отправить его за раз. Уберите вложение через «Изменить» или отправьте вложения отдельными сообщениями."}},"th":{"stringUnit":{"state":"needs_review","value":"ไม่ได้ส่ง: ข้อความนี้ใหญ่เกินกว่าจะส่งในครั้งเดียว นำไฟล์แนบออกด้วย แก้ไข หรือส่งไฟล์แนบแยกเป็นหลายข้อความ"}},"tr":{"stringUnit":{"state":"needs_review","value":"Gönderilmedi: bu ileti tek seferde gönderilemeyecek kadar büyük. Düzenle ile bir eki çıkarın ya da ekleri ayrı iletilerde gönderin."}},"uk":{"stringUnit":{"state":"needs_review","value":"Не надіслано: це повідомлення завелике, щоб надіслати його за раз. Приберіть вкладення через «Редагувати» або надішліть вкладення окремими повідомленнями."}},"vi":{"stringUnit":{"state":"needs_review","value":"Chưa gửi: tin nhắn này quá lớn để gửi một lần. Gỡ một tệp đính kèm bằng Sửa, hoặc gửi các tệp đính kèm trong các tin nhắn riêng."}},"zh-Hans":{"stringUnit":{"state":"needs_review","value":"未发送：此消息太大，无法一次发送。请用“编辑”移除一个附件，或将附件分成多条消息发送。"}},"zh-Hant":{"stringUnit":{"state":"needs_review","value":"未傳送：此訊息太大，無法一次傳送。請用「編輯」移除一個附件，或將附件分成多則訊息傳送。"}}}},
     "prompt.failure.tooLargeFile": {"comment":"Agent pane: under a prompt refused because it was larger than one message can carry; {name} is the attachment that takes the most of it. Retry is not offered, Edit is","extractionState":"manual","localizations":{"en":{"stringUnit":{"state":"translated","value":"Not sent: this message is too large to send at once. Take out {name} with Edit, or send it in a message of its own."}},"ar":{"stringUnit":{"state":"needs_review","value":"لم تُرسَل: هذه الرسالة أكبر من أن تُرسَل دفعة واحدة. أزِل {name} عبر «تعديل»، أو أرسله في رسالة مستقلة."}},"bs":{"stringUnit":{"state":"needs_review","value":"Nije poslano: ova poruka je prevelika da bi se poslala odjednom. Uklonite {name} pomoću Uredi ili ga pošaljite u zasebnoj poruci."}},"da":{"stringUnit":{"state":"needs_review","value":"Ikke sendt: denne besked er for stor til at blive sendt på én gang. Fjern {name} med Rediger, eller send den i en besked for sig."}},"de":{"stringUnit":{"state":"needs_review","value":"Nicht gesendet: Diese Nachricht ist zu groß, um auf einmal gesendet zu werden. Entferne {name} mit Bearbeiten oder sende es in einer eigenen Nachricht."}},"es":{"stringUnit":{"state":"needs_review","value":"No enviado: este mensaje es demasiado grande para enviarlo de una vez. Quita {name} con Editar o envíalo en un mensaje aparte."}},"fr":{"stringUnit":{"state":"needs_review","value":"Non envoyé : ce message est trop volumineux pour être envoyé en une fois. Retirez {name} avec Modifier, ou envoyez-le dans un message à part."}},"it":{"stringUnit":{"state":"needs_review","value":"Non inviato: questo messaggio è troppo grande per essere inviato in una volta. Rimuovi {name} con Modifica o invialo in un messaggio a parte."}},"ja":{"stringUnit":{"state":"needs_review","value":"未送信：このメッセージは一度に送信するには大きすぎます。「編集」で {name} を外すか、別のメッセージで送信してください。"}},"km":{"stringUnit":{"state":"needs_review","value":"មិនបានផ្ញើ៖ សារនេះធំពេកមិនអាចផ្ញើក្នុងពេលតែមួយបានទេ។ ដក {name} ចេញដោយប្រើ កែសម្រួល ឬផ្ញើវាក្នុងសារដាច់ដោយឡែក។"}},"ko":{"stringUnit":{"state":"needs_review","value":"보내지 않음: 이 메시지는 한 번에 보내기에 너무 큽니다. 편집으로 {name}을(를) 빼거나 별도의 메시지로 보내세요."}},"nb":{"stringUnit":{"state":"needs_review","value":"Ikke sendt: denne meldingen er for stor til å sendes på én gang. Fjern {name} med Rediger, eller send den i en egen melding."}},"pl":{"stringUnit":{"state":"needs_review","value":"Nie wysłano: ta wiadomość jest za duża, by wysłać ją naraz. Usuń {name} przez Edytuj albo wyślij to w osobnej wiadomości."}},"pt-BR":{"stringUnit":{"state":"needs_review","value":"Não enviada: esta mensagem é grande demais para ser enviada de uma vez. Remova {name} com Editar ou envie em uma mensagem separada."}},"ru":{"stringUnit":{"state":"needs_review","value":"Не отправлено: это сообщение слишком велико, чтобы отправить его за раз. Уберите {name} через «Изменить» или отправьте отдельным сообщением."}},"th":{"stringUnit":{"state":"needs_review","value":"ไม่ได้ส่ง: ข้อความนี้ใหญ่เกินกว่าจะส่งในครั้งเดียว นำ {name} ออกด้วย แก้ไข หรือส่งแยกเป็นข้อความของมันเอง"}},"tr":{"stringUnit":{"state":"needs_review","value":"Gönderilmedi: bu ileti tek seferde gönderilemeyecek kadar büyük. Düzenle ile {name} ögesini çıkarın ya da ayrı bir iletide gönderin."}},"uk":{"stringUnit":{"state":"needs_review","value":"Не надіслано: це повідомлення завелике, щоб надіслати його за раз. Приберіть {name} через «Редагувати» або надішліть окремим повідомленням."}},"vi":{"stringUnit":{"state":"needs_review","value":"Chưa gửi: tin nhắn này quá lớn để gửi một lần. Gỡ {name} bằng Sửa, hoặc gửi nó trong một tin nhắn riêng."}},"zh-Hans":{"stringUnit":{"state":"needs_review","value":"未发送：此消息太大，无法一次发送。请用“编辑”移除 {name}，或单独发送它。"}},"zh-Hant":{"stringUnit":{"state":"needs_review","value":"未傳送：此訊息太大，無法一次傳送。請用「編輯」移除 {name}，或單獨傳送它。"}}}},
</file context>

[teamleaderleo]

Owned by an agent session · session

[teamleaderleo]

Review (codex, router-review): SHIP at ab77b38

Reviewer: codex gpt-6-astra high, fast tier.

Follow-ups: 1. Each lands as an issue in this repo that links this receipt; the lane that opened the PR fixes it forward.

SHIP at ab77b38

Visual verdict: no images; Leo tries the build

1. [P2][follow-up] managedBy returns { kind: "chief" } from chiefChild alone (webviews/src/agent-session/acpmux/managedBy.ts:27). It never verifies that the Chief session is present in sessions, so a child remains labeled as Chief-managed after the Chief session closes or is absent from the list, contrary to the stated behavior. Preserve the Chief identity from mux.parent and match it against the listed Chief session before showing the banner.

Follow-ups:

• [P2][follow-up] Add the missing after screenshots or capture the managed banner in the gallery/build review.

[cmux-bot]

cmux-bot approves ab77b38: an independent review passed this exact head (router-review receipt by teamleaderleo). A push needs a new review; a later BLOCK at this head dismisses this approval.

[teamleaderleo]

Review finding at PR head ab77b38 — the visible “Take over” control currently records only a local banner dismissal.

App.tsx calls takeOverManaged(shownSessionId) and focuses the composer. managedBy.ts writes a per-chat ID into localStorage and isTakenOver thereafter suppresses the banner. There is no owner/session handoff or message hold. The PR description acknowledges that acpmux still permits the manager's later messages and that holding those messages is a future task.

That yields a user-visible contradiction: the person presses Take over, the managing Chief/agent continues dispatching instructions, and the one line identifying that active manager stays hidden across reloads. A human prompt goes first, but the controller has never changed.

Two safe options to choose with the product owner before shipping this button:

1. Honest v1 semantics: label it “Dismiss” / “Write here” until the daemon exposes an acknowledged owner/turn claim. Keep the 'managed by' notice available when the manager sends again; avoid persisting 'taken over' as an assertion of ownership.
2. Actual Take over: implement an acpmux admission/ownership event for this chat: settle any in-flight message, hold later manager sends, record per-generation authority, and expose 'Return control' with the original owner. Let the UI say Take over only once the daemon confirms.

Suggested negative test: managing chat sends once, person clicks Take over, managing chat sends again; the UI either shows the still-managed state or the backend demonstrably holds the second send. Reload must not silently perpetuate a false owner claim. Cross-device tabs should read the same authority.

Scope: source/code review only, no agent message or live UI tested, and no changes to the owner's branch. The current manager banner itself and lineage detection are useful; this concerns the action semantics.

[teamleaderleo]

W2-08 independent source review — Take over is a UI dismissal, not a control transfer

Read: #30658 at ab77b38aabf67daca42ccfbee9c95e231c29071f, against feat-cmux-next at 1ad39fca7a58d51f548519d3f0bb41436e8840bd (2026-11-01). Evidence: direct source/diff review; no installed-app, networked two-Mac, or automated test run. This complements the existing review's Chief-identity P2.

Three concrete checks, with distinct consequences:

1. The button does not confer authority. App.tsx calls takeOverManaged(shownSessionId), updates local React state, and focuses the composer. managedBy.ts writes only localStorage["cmux.acpmux.takenOver"]; there is no acpmux owner acknowledgement, manager-send fence, or hand-back. A parent/Chief can continue sending after the person clicks. The acpmux agent pair guard protects agent-to-agent message loops, not human control transfers. This limitation is correctly acknowledged in the PR description, but the verb Take over implies a stronger guarantee to the person.
2. 300 chats exceed local preference capacity. TAKEN_OVER_MAX = 200; each takeOverManaged(id) does list.push(id) then slice(-200). Clicking Take over on 300 distinct managed children silently removes the first 100 markers. Reopening child Fix find focus and align search overlay #1 displays the management banner again. This is provable from the implementation, independent of runtime performance.
3. A closed parent still reads as manager. With sessions = [sessionEntry({sessionId:"p",title:"planner",status:"closed"}), sessionEntry({sessionId:"c",spawnedBy:"p"})], managedBy("c",sessions) returns {kind:"agent",name:"planner",sessionId:"p"}. The function only checks a parent name/ID, not lifecycle or host. In mixed Mac/Cloud lists, resolving the owner should also use a qualified host/session identity, not merely a display name.

Low-cost action within the current owner lane: present the control as Write here / Focus composer, retaining the truthful “managed by” identity, until the owner can acknowledge a real handoff. A local dismissal may remain as a clearly labeled visual preference; it should never imply transfer of send privileges.

Future owner-level slice (separate PR, acpmux-owned): a proof-of-person, idempotent transfer_control(targetHost, sessionId, expectedEpoch, requestId) operation: commit authority at the owning daemon/Cloud owner; reject stale/wrong-child attempts; fence later manager messages; acknowledge to all viewers; support explicit Return to manager. Specify whether already running tools finish or are cancelled; a takeover must never claim to undo side effects already executed. Keep Chief's existing exact mux.parent/child identity.

Acceptance negatives: (a) two managed children with the same title on different hosts: transfer one, other unchanged; (b) parent closed or remote unavailable: offer honest owner status; (c) agent-issued transfer with no human proof: denied; (d) lost ACK/retry/reconnect: exactly one transfer generation and identical visible state on two Macs; (e) manager sends after accepted handoff: held; (f) 300 children: no eviction of authoritative takeovers. These are proposed test cases, not passing tests.

I am preserving this as owner-facing evidence, with full W2-08 light/heavy options and other Chief findings in HQ #5944. No owner-branch edits or request for coordinator dispatch.

[teamleaderleo]

Replaced by #30765: the same change rebased onto current feat-cmux-next. This branch conflicted with base, and this lane does not force-push. The SHIP receipt here was at ab77b38. #30765 gets its own review at its head.