Runtime Validation

This skill serves two phases of the pipeline:

• Design phase (Part 1) — planning roles read this to produce a testing strategy before implementation begins
• Validation phase (Part 2) — tester reads this to execute startup verification + write and run tests

Part 1: Testing Strategy

Audience: planning roles producing the pre-implementation plan. Tester reads the resulting testing strategy during validation and executes it. Output: a "Testing Strategy" section in the planning artifact, produced before writing test code.

1.1 Test Tiers

Not every project needs every tier. Pick the tiers that match the app's architecture: