Follow-ups from the #399 review:
- Stateless mock: validate error replies with a placeholder id so the
JSON-RPC-mandated id:null is not recorded as a harness violation, and
skip inbound validation when express left the body unparsed (wrong or
missing Content-Type) — both were false positives blamed on the wrong
party. Same unparsed-body guard in the stateful mock.
- Stateful mock: validate client traffic against the protocol version
the client declares via MCP-Protocol-Version, falling back to
2025-03-26 when the header is absent (it only exists from 2025-06-18,
whose spec says to assume 2025-03-26), instead of always using the
run version.
- sdk-client: validate batches once as a whole array instead of also
per element, which double-recorded every violation.
- Make specVersion required on connectToServer/connectStateful/
createServerStateful; add isSpecVersion to types.ts.
- Extend the NumberSchema erratum to 2025-06-18 (same generator bug on
minimum/maximum, modelcontextprotocol#3139) and add a tripwire test
that forces erratum deletion once the schemas are re-vendored.
- Document the wire-schema-valid / wire-schema-harness-error check IDs
in the README.
5cc567c399