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 v2.1.234 Home All releases olderv2.1.233 v2.1.235newer
Claude Code v2.1.234

REPL tool has an async dispatch path, compiled off

Not switched on
Useful2 Signal4
REPL Tool

The REPL tool could return a receipt and deliver results later, but that path is compiled off.

Async REPL dispatch with background poll delivery is behind a build-time constant that is false here.

What

The REPL tool can now hand a script to a dispatcher, return a receipt immediately and deliver the real result later as a background poll event. The gate is a build-time constant that is false here, so every call runs the synchronous path.

Details
  • The tool's output schema gained an asyncDispatched boolean.
  • There is a cap on how many dispatches can be outstanding; past it, further dispatches are refused.
  • Both the receipt and the refusal text point at a <event kind="repl-eval"> poll event, with the receipt assembled at runtime around the evaluation id and current queue depth.
  • Settle handling runs a PostToolUse pass over the deferred result, so hooks still see it.
Evidence

asyncDispatched

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 v2.1.234 →