You'll noticeTier: how much it should matter to you
2Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
CompactionArea: what it touches
ImprovementsKind: in v2.1.314,
ImprovementsSection of the release
Unclear It is not clear what makes Claude Code include the note about left-out tool results in a summary.
What
Compaction is how Claude Code shrinks a long conversation by replacing earlier parts with a summary, so there is room to keep going. Reactive compaction is the kind that happens as a response during the session rather than on request.
This kind of compaction can now tell the model writing the summary about tool results that were left out. A tool result is the output of an action Claude Code took, such as reading a file. In some cases it also adds extra wording to the summarizer's instructions.
Why
The way conversations are summarized has changed. The summary can now reflect that some tool output was not included.
How sure we are
Something disagreesSomething we can check disagrees with this entry, or the writer said they could not settle it.
The writer flagged doubtIt is not clear what makes Claude Code include the note about left-out tool results in a summary.
