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:

python3 checks/route_gate.py --repo . --route write_spec --issue <issue-number> --state ready_to_spec --json