[teamleaderleo]

Reply footer, part 3 of 3: Codex's turn header.

Leo, 2026-11-02: "compared to claude code our bottom thing looks bad ... i assume the x previous messages are when there's a mix and the worked for is if it's one contiguous thing. notice how on hover it reveals the exact timestamp. let's follow those."

A finished Codex turn's header now follows Codex:

• "N previous messages ›" when the fold mixes the agent's own messages with its work. N counts the agent's messages, each call or thought in the work, and each received report. The answer stays below the header.
• "Worked for 54s ›" when the fold is one stretch of work with no message between.

The chevron and hairline rule are the existing .cv-worked disclosure, unchanged. The turn.previous.one/other strings were already translated in Localizable.xcstrings, though nothing had set row.previous since turns without a summary stopped folding.

Codex turns only. Claude turns keep their per-run folding from #30176 and draw no header. #30176 is not reversed.

Code. turns.ts foldMixesMessages / foldedMessages set previous on the WORKED row, and workedLabel already reads it. The model.ts comment is updated.

Tests

• New unit test conversation/codexHeader.test.ts: one stretch reads "Worked for 1m"; a mix of 5 calls and 1 note reads "6 previous messages"; a Claude turn draws no header.
• New gallery variant agent-pane.transcript codex-turn-headers (a Codex chat). In Chromium the labels read ["5 previous messages", "Worked for 54s"]. Invariant and shift baselines were added for it.
• 41 test files that mention "Worked for" or "previous message" were run at this tree and at base on the Linux pool: the same 7 failures on both (base reds), none new.
• Typecheck and fmt are clean.

Viewed after image: yes. 2x captures of the new gallery variant in light and dark show "5 previous messages ›" over the first turn and "Worked for 54s ›" over the second, each with its hairline rule, and the answer below.

Agent session: agent session

🤖 Generated with Claude Code

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

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Summary by cubic

Finished Codex turns now draw a turn header that matches Codex's own: "N previous messages" when the fold mixes the agent's messages with its work, "Worked for 1m" when the fold is one contiguous stretch of work.

• The header is Codex-only; Claude turns keep their per-run folding and draw no header.
• Adds codexHeader.test.ts covering the mixed, contiguous, and Claude cases, plus a codex-turn-headers gallery variant with baselines.

^{Written for commit bba7ba2. Summary will update on new commits.}

[github-actions]

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

Review bba7ba2: 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=pr31825 -f ref=leo/codex-worked-header -f platform=macos -f backend_mode=local

Gallery before/after for bba7ba2: 16 states rendered, 12 images differ, 2957 more touched states not rendered. Images are in the run's artifact, not on this public PR; the independent review of this head reads them on its own, so the PR needs no hand-made screenshots of these states.

gh run download 41390288269 -R manaflow-ai/cmux -n gallery-advisory-31825-bba7ba2ce89a37f118096181fc1ffa31a10ecb71 (then read gallery-review.json)

States

State	Theme	Status	Diff	Picked by
agent-pane.prompt-after-tool-rows/centered	Apple System Colors	changed	0.0276%	own model.ts
agent-pane.prompt-after-tool-rows/centered	Apple System Colors Light	unchanged	0%	own model.ts
agent-pane.recorded-chats/claude-long-turn	Apple System Colors Light	unchanged	0%	own turns.ts
agent-pane.recorded-chats/claude-long-turn	Apple System Colors	unchanged	0%	own turns.ts
agent-pane.recorded-chats/codex-steered-turn	Apple System Colors Light	changed	0.191%	own turns.ts
agent-pane.recorded-chats/codex-steered-turn	Apple System Colors	changed	0.19%	own turns.ts
agent-pane.recorded-chats/codex-steered-turn-expand	Apple System Colors	changed	0.207%	own turns.ts
agent-pane.recorded-chats/codex-steered-turn-expand	Apple System Colors Light	changed	0.206%	own turns.ts
agent-pane.transcript/codex-turn-headers	Apple System Colors Light	new	0%	own transcript.gallery.ts
agent-pane.transcript/codex-turn-headers	Apple System Colors	new	0%	own transcript.gallery.ts
agent-pane.transcript/grid-rhythm	Apple System Colors Light	changed	0.0576%	own transcript.gallery.ts
agent-pane.transcript/grid-rhythm	Apple System Colors	unchanged	0%	own transcript.gallery.ts
agent-pane.transcript/grid-waiting	Apple System Colors Light	unchanged	0%	own transcript.gallery.ts
agent-pane.transcript/grid-waiting	Apple System Colors	unchanged	0%	own transcript.gallery.ts
agent-pane.transcript/grid-settled	Apple System Colors Light	unchanged	0%	own transcript.gallery.ts
agent-pane.transcript/grid-settled	Apple System Colors	unchanged	0%	own transcript.gallery.ts
agent-pane.transcript/grid-rhythm-hover	Apple System Colors Light	changed	0.0912%	own transcript.gallery.ts
agent-pane.transcript/grid-rhythm-hover	Apple System Colors	changed	0.0376%	own transcript.gallery.ts
agent-pane.transcript/activity-tone-secondary	Apple System Colors Light	unchanged	0%	own transcript.gallery.ts
agent-pane.transcript/activity-tone-secondary	Apple System Colors	unchanged	0%	own transcript.gallery.ts
agent-pane.transcript/activity-tone-tertiary	Apple System Colors Light	unchanged	0%	own transcript.gallery.ts
agent-pane.transcript/activity-tone-tertiary	Apple System Colors	unchanged	0%	own transcript.gallery.ts
agent-pane.transcript/activity-tone-readable	Apple System Colors Light	unchanged	0%	own transcript.gallery.ts
agent-pane.transcript/activity-tone-readable	Apple System Colors	unchanged	0%	own transcript.gallery.ts
agent-pane.access-offer/turn-no-credits	Apple System Colors Light	unchanged	0%	imports turns.ts (1 hops)
agent-pane.access-offer/turn-no-credits	Apple System Colors	unchanged	0%	imports turns.ts (1 hops)
agent-pane.access-offer/turn-low-credits	Apple System Colors Light	unchanged	0%	imports turns.ts (1 hops)
agent-pane.access-offer/turn-low-credits	Apple System Colors	unchanged	0%	imports turns.ts (1 hops)
agent-pane.access-offer/turn-no-offer	Apple System Colors Light	unchanged	0%	imports turns.ts (1 hops)
agent-pane.access-offer/turn-no-offer	Apple System Colors	unchanged	0%	imports turns.ts (1 hops)
agent-pane.acpmux-batch-send/batches	Apple System Colors Light	changed	0%	imports model.ts (1 hops)
agent-pane.acpmux-batch-send/batches	Apple System Colors	changed	0%	imports model.ts (1 hops)

_{Pick other states with a Gallery: entry.id, entry.id/variant line in the PR body.}

Shipped in:

• cmux NEXT nightly 1.0.0-nightly.4139084486201 (b5060b494d)
• cmux NEXT nightly 1.0.0-nightly.4139171596001 (fb7e28b51d)
• cmux NEXT nightly 1.0.0-nightly.4139290103001 (a92c6ce841)
• cmux NEXT nightly 1.0.0-nightly.4139510839501 (d47dcbddc6)
• cmux NEXT nightly 1.0.0-nightly.4139567428201 (14a5e1b153)

[teamleaderleo]

Owned by an agent session · session