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Sweep 28 Aug 2026 · 00:00Z Build v2.1.250 478 read Stable v2.1.236 Latest v2.1.250 Next v2.1.251 Feeds RSS JSON llms.txt
Reading a new release v2.1.251 Analysing changes · 2/5 Deeper second pass · 0/5 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.

Reference / Environment variables

CLAUDE_CODE_EVAL_ARTIFACT_STUB_DIR

A Claude Code environment variable, read out of the shipped bundle. No mined inventory carries it: everything below comes from what this site has written about it.

What it is

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

Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.234.

Presence across releases

The miner has never read a build containing this name. It is here because a changelog entry of ours names it, which is evidence that it existed and not evidence of which releases carried it. The inventory starts at v2.1.138 and everything older than that was never mined.

Changelog entries naming it

  1. v2.1.234Eval runs can publish artifacts to a local directory instead of the service

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

    named in this entry

  2. v2.1.234Artifact stub mode hides the /artifacts browser

    In artifact stub mode the /artifacts browser hides itself, since there is no gallery to browse.

    named in this entry

Documentation pages

None of Anthropic's documentation pages this site has a copy of carries this name.

Names beside it

Every environment variable in the inventory starting claude_code_eval, up to twelve of them.

CLAUDE_CODE_EVAL_An env var turns on the tool that proposes new skills; otherwise it stays off in this build. never mined CLAUDE_CODE_EVAL_ALLOW_ARTIFACT_PUBLISHEval suites can only publish artifacts or override feature flags if you explicitly allow it. never mined CLAUDE_CODE_EVAL_ALLOW_FLAG_OVERRIDESEval suites can only publish artifacts or override feature flags if you explicitly allow it. never mined CLAUDE_CODE_EVAL_INTERVIEW_SESSIONAn env var turns on the tool that proposes new skills; otherwise it stays off in this build. 2.1.233

Read out of the published npm bundle release by release, and out of Anthropic's own documentation as this site captured it. Nothing on this page is a description anybody here wrote about what the environment variable does. All environment variables.