You'll noticeTier: how much it should matter to you
1Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
TelemetryArea: what it touches
ImprovementsKind: in v2.1.323,
ImprovementsSection of the release
What
When you resume or continue a session, it now takes over the tracing identifier from the previous user message. A tracing identifier links related requests together in monitoring tools.
After compaction, which is when Claude Code shortens a long conversation by summarising it, the set of tools carried on as not allowed is rebuilt from the prompt of the turn that was running.
Why
Tracing stays linked across compaction and resume.