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 v2.1.239 Home All releases olderv2.1.238 v2.1.240newer
Claude Code v2.1.239

Re-initializing an SDK session gets an immediate background-task snapshot

You'll notice
Useful2 Signal2
SDK

Re-initializing an SDK session immediately gets a background-task snapshot instead of waiting.

What

A host that re-initializes an already-running Claude Code process, for example after reconnecting, is now sent a snapshot of the current background tasks right behind the success response, even when there are none. It no longer has to wait for the next change to learn what is running.

Details
  • Only applies to a repeated initialize on a live process.
  • Older CLIs send nothing at that point.
Evidence

A host that re-initializes an already-running process (a repeated \initialize\ control request, e.g. after reconnecting) is sent a snapshot of the current set right behind the success response to that request, even when it is empty, so it need not wait for a change; CLIs that predate this send nothing there.

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

See this entry in the whole of v2.1.239 →