CLAUDE_CODE_ARTIFACT_COMMENTS
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.
Set to 0 to stop Claude reading and replying to comments on an artifact. Has no effect when CLAUDE_CODE_DISABLE_NONESSENTIAL_TRAFFIC has turned artifacts off. Requires Claude Code v2.1.221 or later
Anthropic's own wording. Read off Environment variables, captured 2026-09-28.
In the changelogs
13Releases whose published page names CLAUDE_CODE_ARTIFACT_COMMENTS.
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v2.1.248
Artifact comment threads are summarised before Claude acts on them
Artifact comment threads get summarised so the permission prompt names what's being acted on.
named in this entry, found in this entry's text
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v2.1.248
Permission prompts say whose comment is being acted on
Comment permission prompts can name whose comment it is, behind an artifact-comments env var.
named in this entry, found in this entry's text
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v2.1.246
Artifact comments refuse organization service keys
Artifact comments now explain org service key failures clearly, but comments themselves need an env var.
named in this entry, found in this entry's text
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v2.1.239
Artifact request schema: auto_reply gated, embeds compiled out
Artifact auto-reply appears only with comments enabled, and an embeds field is compiled out entirely.
named in this entry, found in this entry's text
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v2.1.239
Artifact watch entries gain unread-comment counters behind the comments flag
Artifact watches can track unread comments and replies, but only with the comments flag on.
named in this entry, found in this entry's text
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v2.1.234
Resuming stopped artifact auto-replies, and marking comments the artifact posted itself
Comments Claude posts to an artifact are now marked as its own, so it stops replying to itself.
found in this entry's text
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v2.1.227
Artifact auto-replies stop describing their own plumbing
Automatic artifact comment replies now sound like plain acknowledgements instead of describing internal plumbing.
named in this entry, found in this entry's text
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v2.1.227
Artifact tool can resolve comment threads, behind an off-by-default flag
Claude could mark a comment thread on a published artifact as resolved, but the path is off.
named in this entry, found in this entry's text
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v2.1.221
Artifact comment errors distinguish egress-proxy blocks and non-activated threads
Artifact comment failures would name the real cause, like a proxy block or an unactivated thread, once enabled.
named in this entry
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v2.1.221
Artifact live-update arming carries auto-react wiring
Artifact live-update watching now carries the plumbing needed for automatic comment replies and cancellation.
named in this entry, found in this entry's text
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v2.1.221
Comment replies always ask, and the prompt names who will see them
Replying to an artifact comment always asks first, and tells you whether the artifact is shared.
named in this entry, found in this entry's text
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v2.1.221
Artifact auto-reply subscriptions can be stopped from the cancel gestures
Escape or double ctrl+x ctrl+k now also turns off automatic replies to comments on your artifacts.
named in this entry, found in this entry's text
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v2.1.221
New artifact comment threads: read, reply, resolve
Reading, replying to and resolving comment threads on published artifacts is built in but off unless enabled.
named in this entry, found in this entry's text
First cited
1The earliest release whose published evidence quoted CLAUDE_CODE_ARTIFACT_COMMENTS was v2.1.239, 21 Aug 2026. That is the oldest release this project wrote about it, so it is a floor on the name's age and not the release that introduced it. It is not a presence reading: which builds carried the name is the table below.
Presence across releases
1Build by build
76One row per release since the first build this name was read out of. Absent means the build was read and the name was not in it, never mined means no bundle for that release was ever archived, and a declared type or a default is only ever what that release's own bundle stated.
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.