# R009 code review — Step 4: Parity tests

Verdict: APPROVE

## Findings

No blocking findings.

## Notes

- `git diff 0e745c4..HEAD --name-only` and `git diff 0e745c4..HEAD` are empty; the parity-test implementation is already present in the current tree rather than introduced by a new commit in this review window.
- Audited `internal/mcp/protocol_test.go`: the shared suite exercises initialize, tools/list, successful and failing tool calls, resources list/read/not-found/sanitized errors, prompts list/get, malformed raw/HTTP requests, and the `TestProtocolTransportParity` canonical JSON comparison between in-memory and Streamable HTTP sessions.
- Verification run: `go test ./internal/mcp -run 'TestProtocol(SharedTransportSuite|TransportParity|MalformedHTTPPost)$' -count=1` passed.
