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 v2.1.301,
Internal ChangesSection of the release
What
Compaction is when Claude Code summarises older parts of a conversation to free up room. Part of it can be worked out ahead of time, a step called precompute. The usage data Claude Code sends about compaction now includes a count of display-only messages, ones meant for showing on screen, that this step left out.
Why
This suggests the precompute step now leaves display-only messages out of what it works from.
