You'll noticeTier: how much it should matter to you
1Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
CompactionArea: what it touches
ImprovementsKind: in v2.1.323,
ImprovementsSection of the release
What
When a conversation gets long, Claude Code can condense it into a summary to free up room. This is called compaction. Two new instructions now guide Claude after that happens:
Tool results left out entirely: Claude should only report that the tool call was made, not guess what it returned. A tool call is one action Claude takes, such as reading a file or running a command.
Text from before compaction: that text is no longer in Claude's working memory, so Claude should read it again with a tool, using the conversation id current, instead of reproducing it from memory.
Why
These instructions change what Claude says about earlier parts of a conversation once it has been condensed. They steer it away from restating content it can no longer actually see.
