The message-history assembly function now derives a thinkingStrippedResponses set and strips thinking blocks from assistant messages whose IDs are in that set before returning the transcript.
Conversation transcript builder gains thinking-stripped-response tracking
Transcript assembly now tracks which assistant responses had thinking stripped and removes those blocks before returning.
Under the hoodTier: how much it should matter to you
2Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
CompactionArea: what it touches
Internal ChangesKind: in v2.1.259,
Internal ChangesSection of the release