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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 v2.1.234

Eval runs can publish artifacts to a local directory instead of the service

Use it now
Useful2 Signal3
Artifacts Notable not in their notes

Point artifact publishing at a local directory and it writes files there instead of calling the service.

CLAUDE_CODE_EVAL_ARTIFACT_STUB_DIR
What

Setting CLAUDE_CODE_EVAL_ARTIFACT_STUB_DIR makes artifact publishing write to that directory rather than contacting the artifact service, producing an index.html, a files/ folder for supporting files and a manifest.json, and returning a synthetic URL with version "1".

Details
  • Supporting file paths that escape the target directory, including via symlink, are skipped with a warning.
  • In this path, payloads named *.workshop.html are run through the structural verifier and refused, listing up to 12 violations.
  • The plugin-eval harness sets the variable for the sessions it spawns.
Evidence

CLAUDE_CODE_EVAL_ARTIFACT_STUB_DIR

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 →