Under the hoodTier: how much it should matter to you
2Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
API ClientArea: what it touches
Internal ChangesKind: in v2.1.228,
Internal ChangesSection of the release
What
Claude Code's copy of the Anthropic SDK builds requests through a middleware chain instead of overriding request preparation. Errors raised by middleware are no longer retried as if they were network failures.
Details
Bedrock SigV4 signing and Vertex path rewriting run as middleware over a complete request; Vertex rewrites the URL path and strips the beta query parameter instead of editing a path field.
Bedrock reads the AWS region from the shared AWS config file and derives a default base URL from it.
Evidence
middleware error (not retryable)
Strings lifted out of the shipped bundle, so the claim above can be checked against them.
