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Sweep 28 Aug 2026 · 16:06Z Build v2.1.251 479 read Stable v2.1.236 Latest v2.1.251 Next v2.1.251 Feeds RSS JSON llms.txt

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_INTERVIEW_SESSION

A Claude Code environment variable, read out of the shipped bundle. It has been in the build since v2.1.233, including the newest one read.

What it is

An env var turns on the tool that proposes new skills; otherwise it stays off in this build.

Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.233.

Presence across releases

ReleasesReadingDeclared typeDefault
2.1.245 – 2.1.251 6 releases never mined — —
2.1.233 – 2.1.243 11 releases in the build bool —

A row reading never mined is a release with no archived bundle behind it. Nothing was read out of it, so nothing here says whether the name was in it. A declared type or a default is only ever what that release's own bundle stated.

Changelog entries naming it

  1. v2.1.233CLAUDE_CODE_SKILL_PROPOSALS turns on the skill-proposal tool

    An env var turns on the tool that proposes new skills; otherwise it stays off in this build.

    named in this entry

  2. v2.1.233Eval report publishing announces itself and is skipped inside interview runs

    Eval report publishing now announces itself, and nested interview runs no longer each publish.

    named in this entry

  3. v2.1.233Two more variables recognised when building subprocess environments

    Two more Claude-owned variables are handled when building environments for subprocesses.

    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_ARTIFACT_STUB_DIRPoint artifact publishing at a local directory and it writes files there instead of calling the service. never mined CLAUDE_CODE_EVAL_CONFINEDIn confined evaluation runs, publishing re-checks a file's identity before reading it. never mined

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.