What probably matters to youSection of the release
What
The switch controlling the design canvas command, tengu_ethereal_nova, now defaults to on instead of off, so with no server-side value the design slash command registers and appears in the menu as "Draft a design on a canvas Artifact — editable where saving is enabled (Claude Design preview)". Two further conditions still apply: artifacts must be enabled for the account, and the Artifact tool must advertise a capabilities field. Whether it is on for a given account is still decided remotely.
Details
The compiled fallback moved from false to true; the live value continues to come from remote config, which overrides the fallback.
The enablement check gating the command is named isDesignCanvasSkillEnabled, and the command name it registers is design.
Accounts without artifacts, or on a build whose Artifact tool schema omits capabilities, see no change.
Evidence
tengu_ethereal_nova, isDesignCanvasSkillEnabled, 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.
tengu_ethereal_novaOn 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 v2.1.238: on
The entry above is what we published on the day. These lines were added later, as Anthropic's own pages caught up, and they sit beside the original rather than replacing it.
Added sinceA small documentation edit on Claude apps gateway for Amazon Bedrock, Claude Platform on AWS, Google Cloud, and Microsoft Foundry touched a line naming /design after this was published.| [`/design-sync`](/docs/en/commands#all-commands) and `/design-login` | Not available | Both need claude.ai, which the CLI doesn't contact on gateway sessions, so neither command appears there |claude-apps-gatewaysee the edit
What has happened since
Flag reading movedThe flag server now returns off for tengu_ethereal_nova, 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 movedThe flag server now returns on for tengu_ethereal_nova, 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 movedThe flag server now returns nothing at all, having stopped carrying it for tengu_ethereal_nova, 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.
One source agreesOne thing we can check says the same as this entry.
Anthropic's documentation agreesA small documentation edit on Claude apps gateway for Amazon Bedrock, Claude Platform on AWS, Google Cloud, and Microsoft Foundry touched a…
