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 v2.1.242 Home All releases olderv2.1.241 v2.1.243newer
Claude Code v2.1.242

Bash background runs honour the caller's constraint, stderr matching normalised

You'll notice
Useful3 Signal2
Bash Tool

Valid foreground bash calls are no longer wrongly rejected, and stderr matching is tidier.

What

Input validation now checks whether the calling request permits or requires a background run before objecting to a foreground one, so a valid foreground call is no longer rejected. Standard error is trimmed and stripped before being matched against patterns, and tool results can carry appended trailing text.

Evidence

"tool_host_result_lines"

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 v2.1.242 →