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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 v2.1.178

DesignSync: Works Without a claude.ai Session Login

What

DesignSync (and the DesignSync tool) now works even when the session authenticates with an API key or provider token, as long as a design credential has been stored via /design-login.

Details
  • Previously, design access required expanding the main OAuth token with design scopes — impossible with API keys
  • Now there is a separate credential slot (designOauth) checked independently of the main session token
  • Error messages are updated to reflect this: the new message for needing authorization is "Run /design-login to authorize it with your claude.ai account — this works even when this session authenticates with an API key or a provider token."
  • The DesignSync tool description is updated to note the (or, for sessions without one, a dedicated design authorization from /design-login) path
Evidence

DesignSync error message (search for "DesignSync needs design-system authorization. Run /design-login", "designOauth")

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

See this entry in the whole of v2.1.178 →