v13.39.0
tambo-ai/tambov13.39.0Oct 13, 2026by thedotmack
Upgrading?
AI Summary
Fixes a critical bug where memory timelines were lost in subagent threads following Codex compaction.
Key Highlights
- Restores memory timeline in subagent threads after Codex compaction.
- New `PostCompact` hook marks compacted threads to restore timeline context.
- Shared session-marker file handling now supports Codex compaction and Kimi context gates.
New Features
- `PostCompact` hook
- Memory timeline restoration for subagent threads
Full Release Notes
## Codex: memory timeline returns to subagent threads after compaction When Codex compacts a thread, the memory timeline drops out of its history. The root thread already got it back through `SessionStart` (source `compact`). Codex never sends `SessionStart` to subagent threads, though, so a subagent that compacted kept working without its memory. - A new **PostCompact** hook marks the compacted thread, keyed by `session_id` plus `agent_id`. - That thread's next **PostToolUse** records the observation as usual, consumes the marker, and returns the timeline once as `additionalContext`. - **SessionStart** clears the marker, so the root thread never gets the timeline twice. - Shared session-marker file handling now backs both the Codex compaction gate and the Kimi context gate. PR: #4733
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