Reapply: real-time message writes to Honcho (re-land #42)

[ajspig]

Re-applies the changes from #42, which were reverted in #53.

#42 made user prompts write to Honcho in real time on UserPromptSubmit (instead of queuing for the SessionEnd flush), and removed the local ~/.honcho/message-queue.jsonl queue. That was reverted in #53 because the real-time path is still blocked on something on the Honcho side.

This PR holds those changes so we can re-land them the moment that's unblocked — do not merge until the Honcho-side blocker is resolved.

Merge order

1. Merge Revert "Simplifying Adding Messages to Honcho (#42)" #53 first (the revert).
2. Then merge this. Its base is the revert-42-realtime-writes branch; once Revert "Simplifying Adding Messages to Honcho (#42)" #53 merges and that branch is deleted, GitHub will auto-retarget this PR's base to main.

Contents

• cache.ts — removes the queueMessage() / queue-file logic
• user-prompt.ts — writes prompts to Honcho in real time (version-nag from feat: nag users when the honcho plugin is behind the published version #48 preserved)
• session-end.ts, config.ts — drop the queue-flush path
• Wraps the full SDK interaction in try/catch in the user-prompt hook (per CodeRabbit review on Simplifying Adding Messages to Honcho #42)

bunx tsc --noEmit passes clean.

🤖 Generated with Claude Code

[coderabbitai]

Important

Review skipped

Auto reviews are disabled on base/target branches other than the default branch.

Please check the settings in the CodeRabbit UI or the .coderabbit.yaml file in this repository. To trigger a single review, invoke the @coderabbitai review command.

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 6fbed391-8cdf-4eb1-9e3a-4ed211dfbd12

You can disable this status message by setting the reviews.review_status to false in the CodeRabbit configuration file.

Use the checkbox below for a quick retry:

• 🔍 Trigger review

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch reapply-42-realtime-writes

---

_{Comment @coderabbitai help to get the list of available commands and usage tips.}