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Claude Code v2.1.233 ·

--watch-artifact flag to follow a claude.ai artifact from a session

A new --watch-artifact flag follows a claude.ai artifact for new versions and comments, but needs account access.

Nothing to try yet Notable No documentation found In Development
JSON All of v2.1.233
Nothing to try yetTier: how much it should matter to you
3Useful: my rating, 1 to 5
5Signal: worth watching, 1 to 5
ArtifactsArea: what it touches
In DevelopmentKind: in v2.1.233,
What probably matters to youSection of the release

Artifact watching is fully built behind the tengu_slate_lantern gate, which falls back off, so most accounts see a refusal message.

What

A new startup flag takes a claude.ai artifact id or URL and watches it for new versions and comments during the session, telling Claude which artifact is the current one of interest. It needs the tengu_slate_lantern gate (fallback off); without it you get "Artifact watching is not available for this account yet."

Details
  • A hidden --watch-artifact-no-autoreact variant arms the watch without automatic comment replies.
  • Both flags are hidden from claude --help, though they parse on every build, and both were added to the lists of flags that take a value and get forwarded.
  • Rejected in non-interactive and print sessions, and in sessions attached to a remote environment; the id is validated against the signed-in environment.
  • Arming prints a feedback line built around "Watching artifact".
Usage
claude --watch-artifact https://claude.ai/public/artifacts/<id>
Evidence

Watch a Claude artifact (id or URL) in this session and hear about new versions and comments

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

Read from
Names in the bundle--watch-artifact--watch-artifact-no-autoreact
Feature flag
tengu_slate_lantern Off by default, switched on for this account

The shipped code defaults this off, and the flag server returned on for the one account this site reads on this version. That is the reading that makes the entry above worth a second look, and it still says nothing about your account.

This account: on · anonymous baseline: on · compiled default in v2.1.233: off

These values were read against a different version of Claude Code, so treat them as the nearest reading available instead of one taken on this release.

Read once, for one account on one subscription tier, against v2.1.233. It isn't a statement about your account. What a flag value here can and cannot tell you

What has happened since
Flag reading moved The flag server now returns on for tengu_slate_lantern, read as this account. A reading is one sample. Claude Code evaluates its flags remotely, so no client sees the targeting rule behind a value and this says nothing about your account.
Flag reading moved The flag server now returns off for tengu_slate_lantern, read as this account. A reading is one sample. Claude Code evaluates its flags remotely, so no client sees the targeting rule behind a value and this says nothing about your account.
Flag reading moved The flag server now returns on for tengu_slate_lantern, read as this account. A reading is one sample. Claude Code evaluates its flags remotely, so no client sees the targeting rule behind a value and this says nothing about your account.
Flag reading moved The flag server now returns nothing at all, having stopped carrying it for tengu_slate_lantern, read as this account. A reading is one sample. Claude Code evaluates its flags remotely, so no client sees the targeting rule behind a value and this says nothing about your account.

See this across every release →

See this entry in the whole of v2.1.233 →

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