specrail-write-product-speclisted

# SpecRail Write Product Spec Use this skill for the product half of the `write_spec` route. ## Steps 1. Confirm the linked issue number. Search first if no issue is provided. 2. Read `workflow.yaml`, `states.yaml`, `labels.yaml`, and the relevant product spec template from `templates/<locale>/product_spec.md` or `templates/product_spec.md`. 3. Run the local gate when available: ```sh python3 checks/route_gate.py --repo . --route write_spec --issue <issue-number> --state ready_to_spec --json ``` 4. Write `specs/GH<issue-number>/product.md`. 5. Keep product content about observable behavior: goals, non-goals, behavior invariants, acceptance criteria, edge cases, and open questions. 6. Write behavior as numbered, testable invariants without implementation detail. 7. Keep implementation approach, file ownership, test commands, and rollout mechanics for the tech spec or task plan. ## Boundaries - Do not write a numbered spec without a linked issue unless a human explicitly chooses a non-GitHub workflow. - Do not translate stable IDs, paths, commands, JSON keys, states, or route names. - Keep human-facing product text in the selected locale.