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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.

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Claude Code v2.1.242

Unix-socket messaging explains how to connect

Use it now
Useful2 Signal3
Cross-Session not in their notes

The unix-socket messaging listener logs the exact command to connect to it.

nc -N -U
What

The unix-socket messaging listener now logs how to connect, including the exact nc -N -U form, and warns that a connection which does not send a complete line within the first-line deadline is closed.

Evidence

"nc -N -U"

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 →