Source Intelligence
Follow Discord
Reading a new release v2.1.251 Analysing changes · 2/5 Deeper second pass · 4/5 agents 427 findings $12.75 so far

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 v2.1.64 Home All releases ←olderv2.1.63 v2.1.66newer→
Claude Code v2.1.64

Improved Parallel Tool Call Error Handling

When a parallel tool call fails, sibling tool calls now receive a clearer cancellation message: "Cancelled: parallel tool call \<name\> errored" — replacing the previous generic "Sibling tool call errored" message. This helps identify which specific tool caused the failure.

Evidence

Error message (search for "Cancelled: parallel tool call")

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 v2.1.64 →