annotate-last: pick which message to annotate (fixes #800)#809
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When running /plannotator-last after /rewind, the newest transcript entry is no longer the message the user intended to annotate, and there was no affordance to pick a different one. Adds a picker UI that surfaces the recent assistant messages so the user can choose which one to annotate: - A "Message N of M" button in the Viewer's sticky-top action bar (alongside Copy / Global comment / Attachments), so it stays accessible while scrolling. - A "Messages" tab in the left sidebar with the full list (newest-first, preview + timestamp, default ★), mirroring the existing Files / Versions / Archive tab pattern. Wired for Claude Code, Codex, and Droid (all share apps/hook/server). OpenCode, Pi, and Copilot still get the original single-message behavior — they don't emit recentMessages, so the picker affordances hide cleanly. Default selection (index 0) matches today's "last message" behavior, so users who don't interact with the picker see no change.
The picker UI from backnotprop#800 was wired for Claude / Codex / Droid only. Pull Copilot and OpenCode onto the same shape so users on those harnesses also get the recent-messages picker when annotating the last assistant message. - Copilot: replace getLastCopilotMessage with getRecentCopilotMessages, walking events.jsonl newest-first up to 25 assistant.message events. - OpenCode: rewrite the session walk to collect up to 25 messages (newest first) instead of bailing on the first hit; normalize the SDK time.created (ms epoch) to ISO to match the shared picker contract. - Both pass recentMessages to startAnnotateServer only when length > 1, matching the existing Claude/Codex/Droid behavior. Also trims a leftover narrating comment in MessagesBrowser and refreshes the stale Copilot session-parser header. Pi parity follows in the next commit (needs round-trip of the picker selection through /api/feedback so its post-submit anchoring quotes the right message).
Extends the picker UI (backnotprop#800) to Pi and fixes a Pi-specific anchoring bug the picker would otherwise introduce. Picker plumbing - assistant-message: getRecentAssistantMessages walks the active branch newest-first, returning { messageId, text, timestamp? } in the same shape the other harnesses produce. - Plumbed through plannotator-browser / plannotator-events so the Bun server's recentMessages option is populated when the branch has more than one assistant message. Anchoring fix - Pi quotes the targeted assistant message back to the agent because its UX is async — the conversation may have moved on by feedback time. With the picker, that target is no longer guaranteed to be the snapshot taken when the UI opened. The editor now sends the user's selectedMessageId with /api/feedback; Pi looks it up in the current branch via findAssistantMessageByEntryId and quotes that message instead. Falls back to the original snapshot if the entry is gone. - The round-trip field is optional and only meaningful in annotate-last mode; other harnesses (and other modes) ignore it. Timestamp safety - Pi's SDK currently types SessionEntryBase.timestamp as string, but the picker contract everywhere else is ISO. Treat the value as unknown and normalize string/number(ms)/Date to ISO; drop anything else, rather than blind-casting and risking silent drift if the SDK changes.
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Ok I gotta go through some more thorough testing myself tomorrow with Claude Code but this should be pretty close to the final form if you want to take a look @backnotprop If not I'll explicitly mark it as ready for review once I've had a chance to check it out more deeply. |
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Fixes #800.
What this changes for users
Running `/plannotator-last` after `/rewind` no longer silently opens on the orphaned pre-rewind message. The annotation UI now surfaces recent messages so you can pick whichever message you like.
Two affordances, both only visible when there's more than one message to choose from:
Default selection (index 0) matches today's "last message" behavior, so anyone who doesn't interact with the picker sees no change.
Coverage
Wired for Claude Code, Codex, and Droid — they all share `apps/hook/server/index.ts` and parse session/rollout files locally, so it was one refactor.
OpenCode, Pi, and Copilot CLI still get the original single-message behavior. They each have their own entry point with their own message source (SDK calls / branch traversal / events.jsonl) — each is ~20 LOC to extend. Happy to do those in this PR if you'd prefer to ship coverage parity, or in a follow-up.
Notes for reviewers
Test plan