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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_ARTIFACT_COMMENT_RESPONDER

A Claude Code environment variable, read out of the shipped bundle. It has been in the build since v2.1.227, including the newest one read.

What it is

A read-only subagent that analyses one artifact comment thread exists but stays off.

Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.227.

Presence across releases

ReleasesReadingDeclared typeDefault
2.1.245 – 2.1.250 5 releases never mined — —
2.1.227 – 2.1.243 16 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. v2.1.227An artifact comment thread can be analysed by a new read-only subagent

    A read-only subagent that analyses one artifact comment thread exists but stays off.

    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_artifact_comment, up to twelve of them.

CLAUDE_CODE_ARTIFACT_COMMENT_FAST_ACKClaude can post a quick 'on it' note in artifact comment threads before the real reply, off unless enabled. 2.1.232 CLAUDE_CODE_ARTIFACT_COMMENT_FAST_ACK_FIXEDA cheaper canned way to acknowledge artifact comments exists but needs two env vars switched on. 2.1.235 CLAUDE_CODE_ARTIFACT_COMMENTSSet to 0 to stop Claude reading and replying to [comments on an artifact](/docs/en/artifacts#collect-comments-on-an-artifact). Has no effect when CLAUDE_CODE_DISABLE_NONESSENTIAL_TRAFFIC has [turned artifacts off](/docs/en/artifacts#availability). Requires Claude Code v2.1.221 or later 2.1.221 CLAUDE_CODE_ARTIFACT_COMMENTS_AUTOREACTSet to 0 to stop Claude [replying on its own to comments sent to it](/docs/en/artifacts#let-claude-reply-to-comments-on-its-own). Requires Claude Code v2.1.228 or later 2.1.221

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.