Under the hood
Compaction status can now be recorded as 'kept', a new fourth state
What
Compaction is the process where Claude Code condenses a long conversation to save space. The internal tracking for a conversation's compaction status previously allowed three values: "clearing", "cleared", and "untouched". It now allows a fourth: "kept".
Why
The finding doesn't say what triggers the "kept" state, but its addition implies there's now a way for content to be explicitly preserved during compaction rather than only being cleared or left untouched.
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The writer flagged doubt
What causes a conversation to be marked 'kept', and what that means for the user, is not stated.