Under the hoodTier: how much it should matter to you
1Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
TelemetryArea: what it touches
Internal ChangesKind: in v2.1.310,
Internal ChangesSection of the release
What
Compaction is when Claude Code summarizes a long conversation to free up space. When automatic compaction fails, the usage data Claude Code records about it now also includes which agent was running, alongside the trigger, outcome, duration, size and error it already recorded.
Why
This only affects what is recorded about a failure. How compaction works for you does not change.