Add expandable command and file-change activity boxes

[Quicksaver]

Summary

This adds richer expandable activity boxes for command and file-change work-log rows in the chat timeline. Command rows can now show the command, raw command, exit code, duration, stdout/stderr or fallback output, and file-change rows can show changed paths plus inline unified diffs when patch data is available.

The implementation keeps this data in the derived work-log model, extracts command result and patch metadata from provider payloads, and renders the richer details without losing the existing compact row behavior.

What Changed

• Preserved command output metadata in WorkLogEntry, including stdout, stderr, fallback output, exit code, and duration.
• Added bounded file-change patch extraction from provider payloads, including Codex-style nested file-change records and simple content diffs normalized into unified patches.
• Kept stable arrival order for unsequenced same-timestamp activity events so streamed output chunks are not scrambled by random event ids.
• Added expandable command details in MessagesTimeline with command/raw-command sections, status chips, tail-truncated output, and full-output expansion.
• Added expandable file-change details in MessagesTimeline with changed-file chips and inline diff rendering through the existing diff rendering utilities.
• Kept generic tool expansion behavior for rows that are neither command nor file-change details.
• Added focused coverage for command output extraction, output merging, file-change patch extraction, renderable command output helpers, and timeline rendering of command/file-change rows.

Why

Individual command and diff events are mostly opaque currently. We can somewhat see what the agent is doing, but we don't have a clear picture of what each command actually outputs, or what each file change actually produced.

Usually that's fine, most times we inspect the end result and trust the agent. Sometimes it's good to inspect a little deeper. For commands we can help steer by debugging their output, or just compare the results with manual runs. For diffs we can see better follow along the multiple changes an agent makes, or even inspect changes to git-ignored files (which don't appear on the main diff panel).

Validation

• pnpm exec vp check passed. It reported 20 existing lint warnings outside this branch's changed files.
• pnpm exec vp run typecheck passed across all packages.
• pnpm exec vp run --filter @t3tools/web test -- src/session-logic.test.ts src/components/chat/MessagesTimeline.logic.test.ts src/components/chat/MessagesTimeline.test.tsx passed, running the @t3tools/web unit test project with 121 files and 1116 tests.

Proof

before:

after:

expanded command output with tail truncation:

expanded inline file-change diffs:

---

Note

Medium Risk
Touches activity ordering and broad provider payload parsing in session-logic, which can affect timeline ordering and displayed tool output; UI changes are localized to chat work rows.

Overview
Adds expandable detail panels for command and file-change rows in the chat work log, so users can inspect stdout/stderr, exit codes, durations, and inline diffs without leaving the timeline.

Data layer (session-logic): WorkLogEntry now carries command result fields (stdout, stderr, output, exitCode, durationMs) and patch, populated from provider payloads (including Codex-style nested shapes). Incremental tool.updated → tool.completed streams merge via prefix-aware concatenation. File-change patches are extracted with bounded depth/size limits and Codex content diffs are normalized to unified patches. Same-timestamp activity ordering no longer breaks ties on event id (preserves arrival order for streamed chunks).

UI (MessagesTimeline): Work rows expand into structured sections—command blocks with tail-truncated output (last 40 lines, full expand), file-change blocks with FileDiff or path chips, and generic fallback for other tools. Expansion is gated by item type so non-command tools (e.g. web search) do not treat stdout as command output. Helpers hasRenderableCommandOutput / getRenderableCommandOutputLines trim outer blank lines while keeping intentional blank lines inside output.

Tests: Coverage for extraction, merging, patch normalization, renderable output helpers, and static markup for expandable command/file-change rows.

^{Reviewed by Cursor Bugbot for commit 19abc64. Bugbot is set up for automated code reviews on this repo. Configure here.}

Note

Add expandable command and file-change activity boxes to the chat timeline

• Work entries in MessagesTimeline now show expand/collapse controls with aria labels; expanded rows render structured command or file-change details instead of raw text.
• Command details include the command string, exit code/duration badges, and stdout/stderr output blocks truncated to the last 40 lines by default with a toggle for the full view.
• File-change details show inline unified diffs with per-file headers (path and +/- stats) or a fallback list of changed file badges; raw patch text is shown when no structured diff is available.
• WorkLogEntry in session-logic.ts gains stdout, stderr, output, exitCode, durationMs, and patch fields, populated by new extraction helpers that normalize heterogeneous provider payload shapes.
• Streaming command output chunks are merged cumulatively via mergeTextOutput; a tiebreaker fix in compareActivitiesByOrder preserves arrival order for same-timestamp events instead of scrambling by id.

^{Macroscope summarized 19abc64.}

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[cursor]

Cursor Bugbot has reviewed your changes using high effort and found 1 potential issue.

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^{Reviewed by Cursor Bugbot for commit 19abc64. Configure here.}

[cursor]

Whitespace stdout hides output

Medium Severity

In extractCommandResult, a whitespace-only stdout string is treated as real output and short-circuits the fallback chain, so values like aggregatedOutput are never read. The work log then stores that blank stdout, skips entry.output, and the expanded command UI hides all streams because they are not renderable.

Additional Locations (1)

• apps/web/src/session-logic.ts#L747-L761

 

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[macroscopeapp]

Approvability

Verdict: Needs human review

This PR introduces significant new functionality (expandable command/file-change activity boxes) with ~1145 lines of new components and logic. Additionally, an unresolved review comment identifies a potential bug where whitespace-only stdout could hide command output. Both factors warrant human review.

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