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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
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Claude Code v2.1.221 ·

HTTP status codes read from the error's status instead of its code

Fixes MCP re-authentication misfiring by reading the real HTTP status instead of guessing from messages.

You'll notice Improvements
JSON All of v2.1.221
You'll noticeTier: how much it should matter to you
3Useful: my rating, 1 to 5
0Signal: worth watching, 1 to 5
MCPArea: what it touches
ImprovementsKind: in v2.1.221,
ImprovementsSection of the release
What

MCP auth-challenge classification is now driven by the HTTP error's status property rather than its code field.

Details
  • Auth-challenge classification for sse/http/claudeai-proxy connect failures and the ENDPOINT_NOT_FOUND special case prefer .status, falling back to .code.
  • The claudeai-proxy 401/403 re-auth path does the same.
  • The GET-stream 404 check no longer matches on the message text.
Evidence

get_stream_404_not_reinit

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

See this entry in the whole of v2.1.221 →

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