Under the hoodTier: how much it should matter to you
1Useful: my rating, 1 to 5
3Signal: worth watching, 1 to 5
CompactionArea: what it touches
Internal ChangesKind: in v2.1.311,
Internal ChangesSection of the release
Unclear It is not stated whether any of these are in use yet.
What
Compaction shortens a conversation so it fits in what the model can accept. Claude Code adds two new recorded reasons around it: one for compaction that names the tools that were loaded, and one for when compaction was not needed at the hard size limit.
There is also a new background task that runs after a turn and is shown as memory save, and a new recorded event about input held behind a prompt in remote sessions.
Why
These point to compaction naming the tools that were loaded and to a memory save that runs after each turn.
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 stated whether any of these are in use yet.
