What probably matters to youSection of the release
Unclear The default value of idleCompaction and exactly what it changes in this version are not settled.
What
Compaction is when Claude Code summarizes the earlier part of a long conversation to free up room. Idle compaction does this while your session sits unused. It now has its own setting, idleCompaction:
It appears as "Idle compaction" in /config, near Auto-compact, defaults to true, and is shown only when certain checks pass. The panel also reads where the value was set to decide whether you set it yourself.
After an idle compaction, Claude Code now says "Compacted while idle, before the prompt cache expired", or a one-hour version, followed by "turn off with "idleCompaction": false in settings.json".
The feature still depends on the tengu_sunny_locket flag and CLAUDE_CODE_IDLE_COMPACT_MIN_TOKENS, and a helper now reports whether the mode is compact or compact_on_return. Nothing has been read about tengu_sunny_locket for this release.
Nearby, new helpers hide synced skills whose plugin is turned off and point to the plugin or to /plugin.
Why
If you would rather Claude Code not summarize your conversation while you are away, you can now switch it off in /config or by setting "idleCompaction": false in settings.json.
