MobileBuildMCP Structured Output Review

Review guardrails for structured output schema correctness and compatibility.

Review scope

• Review-only by default.
• Do not edit product code unless the user explicitly requests implementation changes.

Files to inspect

• schemas/structured-output/**
• src/core/structured-output-schema.ts
• src/core/__tests__/structured-output-schema.test.ts
• src/snapshot-tests/__fixtures__/json/**
• src/snapshot-tests/__tests__/json-fixture-schema.test.ts
• xcodebuildmcp.com/app/docs/_content/schema-versioning.mdx
• xcodebuildmcp.com/app/docs/_content/output-formats.mdx

Guardrails

• schema uses mobilebuildmcp.output.<name> format.
• schemaVersion uses integer strings only.
• Breaking schema changes create a new versioned schema file.
• Published schema versions are not removed or mutated incompatibly.
• Manifest outputSchema matches emitted ctx.structuredOutput payload.
• JSON fixtures validate against current schema contracts.
• $ref usage remains compatible with bundling in structured-output-schema.ts.

Validation

• npm run test:schema-fixtures
• npm test -- src/core/__tests__/structured-output-schema.test.ts
• npm run typecheck
• npx skill-check .agents/skills/mobilebuildmcp-structured-output-review