You'll noticeTier: how much it should matter to you
2Useful: my rating, 1 to 5
3Signal: worth watching, 1 to 5
SDKArea: what it touches
ImprovementsKind: in v2.1.281,
ImprovementsSection of the release
What
In print or SDK mode (Claude Code driven by another program), a process started with --await-claim waits to be claimed before it works. A message that arrives during that wait is now answered with a not_claimed error instead of being run. The error comes in two forms:
one for when the claim failed
one for when no claim has arrived yet, telling the sender to send claim_session before the first message
The first message added by the host program itself is tracked separately. If input ends before it is handled, it is closed with "the input ended first".
Why
A message sent too early is now refused with a clear reason instead of being run before the process has been claimed.
