Under the hoodTier: how much it should matter to you
2Useful: my rating, 1 to 5
0Signal: worth watching, 1 to 5
MCPArea: what it touches
Internal ChangesKind: in v2.1.221,
Internal ChangesSection of the release
What
The MCP SDK moved to string error codes such as CLIENT_HTTP_AUTHENTICATION carried on a code property, and the app's classifiers were widened to match.
Details
The 401 and 403 classifiers accept either code or errorCode.
The retry predicate special-cases the typed HTTP error's status instead of string-matching "Server returned 403 after trying upscoping".
Evidence
ClientHttpForbidden
Strings lifted out of the shipped bundle, so the claim above can be checked against them.
