Under the hoodTier: how much it should matter to you
1Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
Session StateArea: what it touches
Internal ChangesKind: in v2.1.232,
Internal ChangesSection of the release
What
Conversation messages are no longer held by a per-agent hook with a setter callback; the REPL now builds a store that tracks changes and writes messages plus an estimated token count back into app state. Nothing changes on screen, but message updates now reach the UI through one object exposing replace, apply and a snapshot-backed current.
Evidence
setInProgressToolUseIDs
Strings lifted out of the shipped bundle, so the claim above can be checked against them.
