Source Intelligence

DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.

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Claude Code v2.1.246

Per-task stop is first-attached-client-wins and does not survive a worker restart

Under the hood
Useful2 Signal3
SDK not in their notes

The first client to attach decides per-task stop behaviour, and it is lost on worker restart.

perTaskStopAffordance
What

The perTaskStopAffordance declaration is stored on a per-surface capability latch: the first client to attach sets it, and later clients cannot change it. Across worker restarts it is classified as "lost" rather than restored, so a reconnecting client must declare it again or interrupts go back to killing background tasks.

Details
  • Plumbed through the initialize config and the control-request handshake.
  • Any SDK consumer on this build can reach it by setting the field; no remote flag gates it.
Evidence

Declares that this consumer renders a per-task stop control wired to the stop_task control request, perTaskStopAffordance

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

Related

Other releases about the same thing. Found by shared names or similar wording; neither means one caused the other.

See this entry in the whole of v2.1.246 →