Use this skill for reusable project patterns that need evidence and a runnable teaching example. Before product-source changes, check the patterns owned by the project and follow every applicable one.
- Inspect the relevant pattern children and their documented checks.
- Apply an active pattern when its situation and boundary fit.
- Create a candidate only when a real source case, transferable relation, and runnable example exist.
- Keep code, checks, status, and teaching material in agreement.
Read the detailed guide for qualification, approval boundaries, or work under patterns/. Tests, scripts, configuration, migrations, generated code, and docs examples stay outside the product-source gate.