develop-mq

name	develop-mq
description	Implement or change mq parser, selector, schema, mutation, library API, or CLI behavior. Use for any code task in the mirek/mq repository that must follow its specification, package boundaries, dependency policy, and lossless-edit invariants.

Develop mq

1. Read the relevant parts of SPEC.md, TODO.md, and the selected task in todo/.
2. Identify one observable vertical slice; avoid speculative package splits or abstractions outside that slice.
3. Add a failing test with node:test through the public API or CLI boundary.
4. Implement the smallest composable change that passes it.
5. Add round-trip and source-locality cases whenever parsing or rendering is involved.
6. Run pnpm check and pnpm build from the workspace root.
7. Update SPEC.md when behavior changes. Delete completed task files and their TODO.md entries; never mark a todo completed.

Keep filesystem and process concerns in @prelude/mq-cli. Keep the core package deterministic and side-effect free. Prefer Node built-ins and @prelude/* packages; justify other runtime dependencies.