[teamleaderleo]

Leo said "yes" to this, on his screenshot of the coordinator chat. The row he showed, "Sent to build-box/spinner-lane · and 5 more commands coordinator: Leo's answer (v…", put a count, a target and a message preview on one truncated line. Then, of two more captures of the same rows: "i also think this is quite weird looking". In those captures:

• an opened send floated its Copy beside the chevron, with "Raw ⌄" on an oddly indented line;
• envelope rows were bright or dim with no rule;
• the live "Sending message to … 3m 56s · ↓1.4K out ↑819.5K in" line had no icon.

Change

A message row between agents now puts its verb, recipient chip, count and chevron on the row. The message's first line goes on its own line under it, at the text column, cut there. This covers:

• a send (SentMessageLine.tsx for acpmux send and sub-session sends, AgentMessageRow.tsx for SendMessage);
• another agent's received line and an inbox thread (IncomingMessageCard.tsx, InboxNoticeCard.tsx, through a new below slot on DisclosureRow);
• a folded group's head (MessageGroupHead.tsx: the senders under "7 messages from 6 sessions").

messageLineLook.ts holds the look: stacked (the default) and two gallery versions, single (before) and quiet (no preview until opened). I compared the three and picked stacked: the chip and count read at a glance, and the preview stays one click from the whole message.

• Opened send. The message sits at the text column, with Copy and Raw quiet on one line under it at the same indent. Nothing sits beside the chevron, and Raw no longer indents twice (SubsessionCallCard.css).
• One tone. A send row the reader clicked no longer brightens on focus. It keeps the rows' steady tone, as a received line already does. "Sending" and "Sent" are told apart by their words.
• Live send line. "Sending message to …" drops the turn's token count, which said nothing about the send (Thinking.tsx).
• Estimates. model.ts adds the preview's 18px line to a shut stacked row that has one: sends, received lines, inbox threads, the waiting group and an inbox batch's head.

Gallery: agent-pane.message-line-look shows a coordinator turn like Leo's capture in stacked, opened, single and quiet.

Spec: leo-workspace design/chat-transcript.md.

Activity rows, one grammar

Then, on the tray and its rows: "stuff like this is just extremely bruh" and "and this...". This head also:

• Icon column. The live line's words start on the rows' text column with no mark of its own, as Agent chat: tool rows and the live line read as Claude Code's #33241 settled (Claude Code's live line); this head keeps that.
• Token counts. The live line says one count, "47.4K tokens", with the out/in split on its hover (Agent chat: tool rows and the live line read as Claude Code's #33241's default), never "↓ out ↑ in" in its words; a send's line shows none.
• Notices. A tool's notice (Agent pane: a tool's notice is one received line with its severity, sender, machine and title #32970) keeps its title and severity tag on its line; a plain message stacks its first line under it.
• One message, one line. A pending card or lane batch holding a single message renders as that message's own line ("Message from X" with its preview), not a group head over a repeated child. The estimate in model.ts follows.
• Not here: the Thinking duration is Agent chat: the live line says what the turn does, and its time reads as the turn's total #33248's timer fix; the queued-message controls were aligned in Agent chat: pin a waiting steer's Send now, × and Copy to the bubble's edge #33333; the host label stays (it shows only when it differs, per the earlier decision); the chip's style is left for the design-system tokens.

Tests

SentMessageLine.test.tsx now checks the stacked line: the chip and count on the row, the preview below it, the preview toggling the row, and Copy with Raw under an opened message. It also checks that single keeps the old line. The earlier assertions now read the preview from its own line.

Observed / Not run

• Unit tests for the affected rows ran on the build fleet; typecheck and format pass at this head; the rows' estimate, grammar and preview tests were updated to read the first line from its own line.
• Browser layout tests (spacing table, row pitch, chevron column) run in this PR's webview suite; their one-line pitch values are being restated for the two-line message rows here.

Changelog

• Changed: message rows between agents show the recipient and count on one line and the message's first line under it; an opened sent message shows Copy and Raw under it.

🤖 Generated with Claude Code

Agent session: agent session

[github-actions]

cmux status _{(one comment, edited in place; each line is updated by the job that owns it)}

Review 00231b4: HQ feed card · gallery before/after runs · checks

App of this head (app.zip, kept 1 day)

gh workflow run reload-build.yml -R manaflow-ai/cmux --ref feat-cmux-next -f tag=pr33249 -f ref=lane/activity-row-two-lines -f platform=macos -f backend_mode=local

Gallery before/after for 00231b4: the capture produced no images (run).

Yours to fix: incoming-message-disclosure-browser.test.ts (a file this PR changes), transcript-rhythm.test.ts (a file this PR changes), transcript-rhythm.test.ts (a file this PR changes) and 2 more. Also failing here, not on main: transcript-meta-columns-browser.test.ts, transcript-meta-columns-browser.test.ts. Seen on other PRs too (likely flaky): render.test.tsx, agent-pane-agents-pill.test.ts.

CI failed on 00231b45ca (run 41656214035 attempt 1): 2 code, 1 unknown.

Job	Verdict	Why
web / react-apps-base-check (5)	code	a web test failed
web / react-apps-base-check (2)	code	a web test failed
web / react-apps-check	unknown	no known signature; failed step: Check webview test shards

Failures:

• yours incoming-message-disclosure-browser.test.ts a delivered message and a waiting one draw the same line: chevron after the words, actions on hover: failed (job)
• new in this PR transcript-meta-columns-browser.test.ts dark: every meta row shares one icon column and one text column: failed (job)
• new in this PR transcript-meta-columns-browser.test.ts light: every meta row shares one icon column and one text column: failed (job)
• seen on other PRs render.test.tsx no rule declares a background other than transparent or the two interaction tokens: failed (job)
• seen on other PRs agent-pane-agents-pill.test.ts by default the running agents sit in the tray above the composer, not in the transcript: failed (job)
• yours transcript-rhythm.test.ts light 480px: opened cards share lines and count spacing: failed (job)
• yours transcript-rhythm.test.ts dark 480px: opened cards share lines and count spacing: failed (job)
• yours transcript-rhythm.test.ts light 1000px: opened cards share lines and count spacing: failed (job)
• yours transcript-rhythm.test.ts dark 1000px: opened cards share lines and count spacing: failed (job)

Matched log lines

web / react-apps-base-check (5): (fail) a delivered message and a waiting one draw the same line: chevron after the words, actions on hover [1047.52ms]
web / react-apps-base-check (2): (fail) no rule declares a background other than transparent or the two interaction tokens [1.02ms]

Not re-run automatically: web / react-apps-base-check (5), web / react-apps-base-check (2), web / react-apps-check are not machine failures.

Written by scripts/ci/classify_failures.py (ci-failure-attribution.yml); signatures are its SIGNATURES table. A machine verdict is the runner's fault, not this PR's; yours means the failing file is one this PR changes, also red on main that main's latest full suite fails the same way, seen on other PRs that it failed on another pull request's run lately.

red: web / Web status; a job it gathers is red on this change (its line here); do not merge until green; see lane-rules
red: web / react-apps-base-check (2); NEW webview test reds: test/browser/transcript-rhythm.test.ts > light 480px: opened cards share lines and count spacing; test/browser/transcript-rhythm.test.ts > light 1000px: opened cards share lines and count spacing; test/browser/transcript-rhythm.test.ts > dark 480px: opened cards share lines and count spacing (+1 more); do not merge until green; see lane-rules
red: web / react-apps-base-check (5); NEW webview test reds: test/transcript-meta-columns-browser.test.ts > light: every meta row shares one icon column and one text column; test/transcript-meta-columns-browser.test.ts > dark: every meta row shares one icon column and one text column; test/incoming-message-disclosure-browser.test.ts > a delivered message and a waiting one draw the same line: chevron after the words, actions on hover; do not merge until green; see lane-rules
red: web / react-apps-check; a job it gathers is red on this change (its line here); do not merge until green; see lane-rules

Shipped in:

• cmux NEXT nightly 1.0.0-nightly.4166527817101 (72aa23abec)
• cmux NEXT nightly 1.0.0-nightly.4166687160001 (cd679bd6f0)
• cmux NEXT nightly 1.0.0-nightly.4166822316701 (a8aa75879e)
• cmux NEXT nightly 1.0.0-nightly.4167014501001 (63381baf63)

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[teamleaderleo]

Owned by an agent session · session

[blacksmith-sh]

Found 11 test failures on Blacksmith runners:

Failures

Test	View Logs
src/pages/settings/render.test.tsx/render.test.tsx	View Logs
src/pages/settings/render.test.tsx/render.test.tsx	View Logs
test/agent-pane-agents-pill.test.ts/agent-pane-agents-pill.test	View Logs
test/agent-pane-agents-pill.test.ts/agent-pane-agents-pill.test	View Logs
test/browser/transcript-rhythm.test.ts/transcript-rhythm.test	View Logs
test/browser/transcript-rhythm.test.ts/transcript-rhythm.test	View Logs
test/incoming-message-disclosure-browser.test.ts/ incoming-message-disclosure-browser.test	View Logs
test/incoming-message-disclosure-browser.test.ts/ incoming-message-disclosure-browser.test	View Logs
test/transcript-meta-columns-browser.test.ts/transcript-meta-columns-browser.test	View Logs
test/transcript-meta-columns-browser.test.ts/transcript-meta-columns-browser.test	View Logs

...and 1 more test failures. View all on Blacksmith

^{Need help on this PR? Tag @codesmith-bot with what you need.}

[teamleaderleo]

Review (codex gpt-6.1-sol xhigh, next-review): BLOCK at 74c1927

BLOCK at 74c1927
Visual verdict: no images; Leo tries the build

1. [P1] [blocking] conversation.css:2379 — Update the remaining tests. activityTone.test.ts:12 still requires the old focus selector; replaying that assertion with Node fails. Browser tests also retain incompatible expectations: incoming-message-disclosure-browser.test.ts:240 requires a 22px row, and message-preview-browser.test.ts:94 waits for the removed .cv-received__preview. These leave the webviews suite failing.

Follow-ups:

2. [P2] [follow-up] model.ts:2030 — Reconcile preview spacing with estimates. DisclosureRow and AgentMessageRow retain a 12px flex gap, so closed stacked rows occupy 22 + 12 + 18 = 52px while estimates reserve 40px. Shell sends have no corresponding gap. This creates inconsistent pitch and incorrect geometry before measurement.
3. [P2] [follow-up] model.ts:1985 — Add preview height only when the batch renders one. Delivered inbox batches pass senders={undefined} to MessageGroupHead, producing a 22px head, but this branch reserves 40px.
4. [P2] [follow-up] MessageLineLook.gallery.ts:146 — Supply stacked and opened gallery captures; this head has no images for visual verification.

[teamleaderleo]

Review (codex gpt-6-astra high, router-review): BLOCK at 141a58b

BLOCK at 141a58b
Visual verdict: no images; Leo tries the build

1. [P1] [blocking] webviews/src/agent-session/acpmux/conversation/PendingMessagesCard.tsx:63 removes .cv-pending__toggle for a single message, but existing consumers still require it. incoming-message-disclosure-browser.test.ts:451, agent-pane-suggested-tasks.test.ts:1055, and the queued-message gallery’s menu play (QueuedMessageCard.gallery.ts:61) wait/click that now-absent element. Update these consumers to handle the singleton row; otherwise the browser tests and gallery play time out.

2. [P2] [follow-up] webviews/src/agent-session/acpmux/model.ts:2000 adds 18px to every collapsed inbox batch. Delivered batches explicitly pass senders={undefined} in LaneNoticeBatch.tsx:94, so they render no preview. Match the renderer’s condition to prevent inflated virtual heights and corrections when these rows mount.

3. [P2] [follow-up] webviews/src/agent-session/acpmux/conversation/MessageLineLook.gallery.ts:149: no after images were supplied. Check the stacked and opened layouts in the build.

Runtime tests could not run: Bun and dependencies are absent.

Follow-ups:

• Match inbox-batch estimates to rendered previews.
• Visually check stacked and opened rows in the build.

[teamleaderleo]

Review (codex gpt-6-astra high, router-review): BLOCK at 3833f28

BLOCK at 3833f28
Visual verdict: no images; Leo tries the build

1. [P1] [blocking] webviews/test/message-preview-browser.test.ts:104 — The selected .cv-disclosure__below is now a sibling of .cv-disclosure__line. Consequently, closest(".cv-disclosure__line") returns null and this browser test throws. Find the header through the containing disclosure instead.

2. [P1] [blocking] webviews/src/agent-session/acpmux/conversation/AgentMessageRow.tsx:137 — Emptying the toggle’s preview collapses its width to zero under the existing transcript flex: 0 1 auto rule. The remaining Playwright click at message-preview-browser.test.ts:130 therefore times out. Preserve a visible toggle target, or update the remaining browser interactions to use the preview/header.

3. [P2] [follow-up] webviews/src/agent-session/acpmux/conversation/MessageLineLook.gallery.ts:148 — Supply gallery captures of the stacked and opened variants; no images were available to verify their layout.

These findings are from static inspection; Bun is unavailable in this box.

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Bugbot needs on-demand usage enabled

Bugbot uses usage-based billing for this team and requires on-demand usage to be enabled.

A team admin can enable on-demand usage in the Cursor dashboard.

[teamleaderleo]

Review (codex, router-review): SHIP at c64a066

Reviewer: codex gpt-6.1-sol xhigh, fast tier.

Follow-ups: 3. Each lands as an issue in this repo that links this receipt; the lane that opened the PR fixes it forward.

SHIP at c64a066
Visual verdict: no images; Leo tries the build

1. [P2] [follow-up] webviews/src/agent-session/acpmux/conversation/SentMessageLine.tsx:271: The collapsed preview is now aria-hidden, absent from the row’s accessible name, and unmounted elsewhere until opened. Include the preview in the row’s accessible label or description.

2. [P2] [follow-up] webviews/src/agent-session/acpmux/conversation/AgentMessageRow.tsx:150: Preview clicks bypass foldToggleAt, losing the header’s controlled bottom expansion and scroll anchoring. Route them through the header’s anchoring path; the new previews in SentMessageLine and MessageGroupHead have the same issue.

Static tone tests and TypeScript transpilation passed. React/browser verification was unavailable because dependencies are missing.

Follow-ups:

• Preserve collapsed send previews for screen readers.
• Preserve fold anchoring when clicking previews.
• [P2] [follow-up] webviews/src/agent-session/acpmux/conversation/MessageLineLook.gallery.ts:148: Capture stacked and opened states for visual review.

[cmux-bot]

cmux-bot approves cdeb192: 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.

A newer verdict blocks ff343a7 (no independent SHIP at the head).

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Bugbot needs on-demand usage enabled

Bugbot uses usage-based billing for this team and requires on-demand usage to be enabled.

A team admin can enable on-demand usage in the Cursor dashboard.

[cursor]

Bugbot needs on-demand usage enabled

Bugbot uses usage-based billing for this team and requires on-demand usage to be enabled.

A team admin can enable on-demand usage in the Cursor dashboard.

[teamleaderleo]

Review (codex, router-review): SHIP at 00231b4

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

Follow-ups: 2. Each lands as an issue in this repo that links this receipt; the lane that opened the PR fixes it forward.

SHIP at 00231b4
Visual verdict: no images; Leo tries the build

Static review completed; tests could not run without Bun and webview dependencies.

1. [P2] [follow-up] webviews/src/agent-session/acpmux/conversation/IncomingMessageCard.tsx:443: Opening a pending group of ordinary messages leaves each child’s header without text: PendingMessagesCard.css:41 hides its sender, and this change removes its inline preview. Preserve an inline preview for those children or restore their sender so each message avoids an empty 22px header above its preview.

2. [P2] [follow-up] webviews/src/agent-session/acpmux/conversation/MessageLineLook.gallery.ts:163: Capture the stacked and opened variants, including an expanded waiting group, for visual verification; this head has no images.

Follow-ups:

• Fix empty child headers inside expanded pending groups.
• Capture and inspect the changed message layouts.

[cmux-bot]

cmux-bot approves 00231b4: 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.