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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.

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Claude Code v2.1.229

New /design skill drafts multi-artboard canvases as an Artifact, gated off

Not switched on
Useful3 Signal5
Artifacts Notable not in their notes

A /design skill drafting multi-artboard canvases as editable Artifacts is bundled but switched off.

A full design-canvas skill publishing pan-and-zoom artboards with an in-page editor needs a flag that falls back to false plus a capability-advertising Artifact tool.

Feature flag
tengu_ethereal_nova On for this account, and not off by default

The flag server returned on for the one account this site reads, and nothing in this release compiles it off by default. The compiled default is shown below, and says which it is when we cannot read one: a fifth of gates compile in a string or a number rather than on or off, and most published releases have no gate table behind them at all. No client can see what the server returns for your account.

This account: on · anonymous baseline: on · compiled default in v2.1.229: on

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 v2.1.229. It isn't a statement about your account. What a flag value here can and cannot tell you

/design
What

A large new bundled skill drafts designs as .dc.html artboards laid out on a single pan-and-zoom canvas and publishes them as an Artifact, with an editor built into the published page. Saving republishes for everyone only where the artifact grants the self-write capability; otherwise the page is view plus PNG and PDF export. It registers a design slash command. Off in this build: it needs tengu_ethereal_nova, which falls back to false, and an Artifact tool that advertises capabilities.

Details
  • ships as a skill document plus a canvas seeding script and a precompiled editor page payload
Evidence

Draft a design on a canvas Artifact — editable where saving is enabled (Claude Design preview)

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

Related

Other releases about the same thing. Found by shared names or similar wording; neither means one caused the other.

See this entry in the whole of v2.1.229 →