You'll noticeTier: how much it should matter to you
3Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
MCPArea: what it touches
New FeaturesKind: in v2.1.248,
New FeaturesSection of the release
What
MCP error handling has an explicit set of codes it treats as retryable, combining HTTP 5xx, the existing connection error codes, and auth-rejection codes such as helper-minted credential rejections.
Details
The MCP error classes moved out of a lazily loaded wrapper into plain top-level classes.
Applies unconditionally, with no flag.
Evidence
HEADERS_HELPER_AUTH_REJECTED
Strings lifted out of the shipped bundle, so the claim above can be checked against them.
