Summary

Request a dedicated session:compact or session:compacted hook event that fires when a session is compacted/summarized.

Use Case

When a session is compacted, the agent loses specific memories and operational patterns learned during the session. I want to inject a reminder to re-read key files (like learned-patterns.md, current-focus.md) after compaction so that important knowledge survives.

Current Workaround

I've built a workaround that:

1. Hooks into agent:bootstrap
2. Detects compaction by looking for markers like "session is being continued" or "ran out of context" in recent messages
3. Injects a reminder if detected

This works but is fragile — it depends on specific phrasing in compaction summaries.

Requested Event

A proper session:compact event that fires once when compaction completes, with context like:

• sessionId / sessionKey
• summaryLength or tokensRetained
• Ability to inject messages into the post-compaction context

This would enable reliable post-compaction memory refresh without relying on text detection.

Related

The hooks documentation shows session:start and session:end as "planned events" — this would fit naturally alongside those.