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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 v2.1.250 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_PLAN_ARTIFACTS

A Claude Code environment variable, read out of the shipped bundle. It was in the build from v2.1.223 and was gone by v2.1.238.

What it is

Plan artifacts now have their own switch instead of riding along with an unrelated experiment.

Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.223.

Presence across releases

ReleasesReadingDeclared typeDefault
2.1.245 – 2.1.250 5 releases never mined — —
2.1.238 – 2.1.243 6 releases not in the build — —
2.1.223 – 2.1.237 14 releases in the build triBool —

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. v2.1.223Thrifty-sonic narrowed to one model; plan artifacts moved to its own gate

    Plan artifacts now have their own switch instead of riding along with an unrelated experiment.

    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_plan, up to twelve of them.

CLAUDE_CODE_PLAN_MODE_INTERVIEW_PHASENo description from anybody. 2.1.138 CLAUDE_CODE_PLAN_MODE_REQUIREDNo description from anybody. 2.1.138 CLAUDE_CODE_PLAN_V2_AGENT_COUNTNo description from anybody. 2.1.138 CLAUDE_CODE_PLAN_V2_EXPLORE_AGENT_COUNTNo description from anybody. 2.1.138

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.