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Sweep 22 Oct 2026 · 21:04Z Build v2.1.309 528 read Stable v2.1.308 Latest v2.1.309 Next v2.1.309 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.248 ·

Design error classes relocated in the bundle

Design auth error types moved, joined by a new precondition error and response shapes.

Under the hood Internal Changes
JSON All of v2.1.248
Under the hoodTier: how much it should matter to you
1Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
Claude DesignArea: what it touches
Internal ChangesKind: in v2.1.248,
Internal ChangesSection of the release
What

The Claude Design authentication error types moved to the top level of the bundle with their wording and the design_tool_auth_401 code intact, joined there by a new precondition error and the response shapes for the project read, search, write, delete and info calls. Whether the consent and project-grant error types were re-declared elsewhere is not visible in this build.

Evidence

design_tool_auth_401

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

See this entry in the whole of v2.1.248 →

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