PR #82 Review - Researcher Agent Infrastructure Test Coverage Gap When reviewing new MCP tool implementations (create_proposal, list_proposals), found that integration tests in spec/requests/api/v1/mcp_spec.rb are REQUIRED. Every other MCP tool has comprehensive test coverage covering success cases, error cases, permission checks, and edge cases. Pattern to follow for new MCP tool tests: - describe block in "POST /api/v1/mcp/execute" section - Success case (tool works as expected) - Error case (validation failures, invalid parameters) - Permission check (non-authorized roles blocked) - Edge cases (nil values, empty results, missing associations) Test files: - spec/requests/api/v1/mcp_spec.rb - Integration tests for MCP tools - spec/models/mcp_synchronization_spec.rb - Role configuration validation Researcher agent infrastructure implementation was solid: - Proper project-scoped queries - Good permission guardrails - Well-structured system prompt - Missing only test coverage