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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 v2.1.232

Session names from the environment are normalized before use

Use it now
Useful2 Signal1
Elsewhere not in their notes

A blank CLAUDE_CODE_SESSION_NAME now falls back to the directory-derived name.

CLAUDE_CODE_SESSION_NAME
What

A name set through CLAUDE_CODE_SESSION_NAME is passed through a normalizer, and if the result is empty an interactive session falls back to the name derived from the working directory rather than registering a blank one.

Details
  • The session pid file now also records where the name came from and a timestamp for when it was set; the recorded source in this build is the derived one.
Evidence

CLAUDE_CODE_SESSION_NAME

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 v2.1.232 →