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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.

← All of v2.1.251 Home All releases ←olderv2.1.250
Claude Code v2.1.251

Design login errors now say which credential was actually sent

You'll notice
Useful3 Signal2
Auth

Design login failures now tell you whether to run /design-login or /login.

/design-login/login
What

When the Claude Design connector rejects your token, the message now depends on what was sent: no credential at all, a /design-login credential, a claude.ai login that already carries Design permissions, or a plain login. That points you at /design-login or /login specifically instead of one generic failure.

Details
  • Applies whenever first-party MCP authentication is rejected.
Evidence

even though that login already includes Claude Design permissions

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 v2.1.251 →