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.

All of v2.1.247 Home All releases olderv2.1.246 v2.1.248newer
Claude Code v2.1.247

The interruptible_tool_in_progress stream event is gone

You'll notice
Useful3 Signal3
SDK Streaming

Clients no longer get the stream event announcing that a long tool is still running and interruptible.

What

Claude Code no longer emits the stream message that told clients a long-running tool was still going and could be interrupted. The callback that delivered it has been pulled out of the dispatcher, the SDK message switch and the list of recognised message kinds, so any client subscribed to it simply stops receiving anything. Nothing replaces it as a signal: callers now infer tool state from the abort path instead.

Details
  • The event name interruptible_tool_in_progress does not appear anywhere in this build.
  • Working out why a tool was aborted now rests on whether the tool had actually begun running, and on the shell caller kind reported by shellCallerOf, which is one of inner, turn or agent.
  • The per-tool lookup of interrupt behaviour and the state updater that emitted the event were both deleted.
  • Where the tool scheduler used to update interruptible state, it now wakes waiting callers directly.
Evidence

shellCallerOf, interruptible_tool_in_progress

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 v2.1.247 →