MCP Herald

Static migration linter for the MCP 2026-07-28 spec

Scans your MCP server's source for the breaking-change signatures of the 2026-07-28 spec, then reports, file and line, what to change. It flags the retired -32002 error code (SEP-2164), stateful sessions (SEP-2575), deprecated roots/sampling/logging (SEP-2577) and OAuth without resource metadata (RFC 9728/8707). Every finding links its SEP/RFC. Single Rust binary, SARIF + GitHub Action. 93 tests, on crates.io, MIT.