You'll noticeTier: how much it should matter to you
3Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
SessionsArea: what it touches
ImprovementsKind: in v2.1.224,
ImprovementsSection of the release
What
Uploading a session transcript to the remote side no longer decides what is new by comparing a stored index against the message count, which could miss or duplicate work after a compaction. It now anchors on message ids and tracks which it has already seen, logging when it detects that history was rewritten.
Details
Messages are counted as seen without being uploaded once the session binding has detached.
Uploads of compaction pairs are skipped entirely for sessions carrying history-backfill suppression, with a log line saying so.