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 v2.1.323,
ImprovementsSection of the release
Unclear The conditions that decide whether this runs were not worked out, so it is unclear whether it is active for anyone.
What
Compaction is how Claude Code shrinks a long conversation: it replaces older messages with a summary so the conversation keeps fitting in the model's memory. Claude Code can prepare that summary in advance. That preparation can now start beside a turn, while Claude is still working on your request. Before, it could only start while the session was idle.
The preparation shows up in status as compact_beside_turn.
Why
When the conversation fills up, the summary may already be ready, which could shorten the wait before work continues.
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 doubtThe conditions that decide whether this runs were not worked out, so it is unclear whether it is active for anyone.
