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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_COMMENTS_AUTOREACT

A Claude Code environment variable, read out of the shipped bundle. It has been in the build since v2.1.221, including the newest one read.

What it is

Set 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

Anthropic's own wording. Read off Environment variables, captured 2026-08-28.

Presence across releases

ReleasesReadingDeclared typeDefault
2.1.245 – 2.1.250 5 releases never mined — —
2.1.221 – 2.1.243 22 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. v2.1.238Artifact auto-reply state written into the transcript so it survives resume and fork

    Automatic replies to artifact comments would survive resume and fork, but the opt-in is off by default.

    named in this entry

  2. v2.1.233Auto-reply guidance tells Claude to check for an existing answer before posting

    Auto-reply guidance now tells Claude to read the thread and resolve rather than duplicate.

    named in this entry

  3. v2.1.233Automatic comment replies stand down if someone else answers first

    Claude withholds an automatic artifact comment reply if someone else answered while it was writing.

    named in this entry

  4. v2.1.227Auto-reply to artifact comments can include earlier analysis notes

    Automatic artifact comment replies can carry earlier analysis notes, treated as untrusted observations.

    named in this entry

  5. v2.1.221Artifact comment auto-reply subsystem

    Claude can watch artifact comment threads and post replies or edits, off unless you set the env var.

    named in this entry

  6. v2.1.221Auto-replies to artifact comments

    Claude could answer artifact comments automatically, but the whole path is inert unless you turn it on.

    named in this entry

Documentation pages

A reference table page is one whose own table defines this name, and it is where the description above came from. A page that mentions it carries the name somewhere in its text and may say nothing about it at all. Every page carrying it.

Names beside it

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

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

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.