Under the hoodTier: how much it should matter to you
2Useful: my rating, 1 to 5
3Signal: worth watching, 1 to 5
SessionsArea: what it touches
Internal ChangesKind: in v2.1.248,
Internal ChangesSection of the release
What
The per-session scratch store gained accessors for pending conversation edit kinds, assistant messages the client truncated, and thread keys it does not support, and renamed its worker check-in field. Nothing user-visible, but it shows client-side truncation now being tracked as state.
Evidence
clientTruncatedAssistantIds
Strings lifted out of the shipped bundle, so the claim above can be checked against them.