Under the hoodTier: how much it should matter to you
2Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
MCPArea: what it touches
Internal ChangesKind: in v2.1.232,
Internal ChangesSection of the release
What
When probing an MCP server falls back to the legacy transport, the reason is now recorded distinctly as an id mismatch, a malformed response or a premature stream end, rather than one undifferentiated legacy fallback.
Evidence
_anthropicProbeLegacyEvidence
Strings lifted out of the shipped bundle, so the claim above can be checked against them.
