runtime-validation

Runtime validation for migrated applications — covers testing strategy (planning phase) and test execution (validation phase): startup verification, integration testing, and end-to-end flow validation. Use when: (1) designing test strategy during planning phase (teamlead reads Part 1) (2) verifying a migrated app starts and runs correctly (3) writing or executing integration / E2E tests (tester reads Part 2) (4) choosing test tooling and environment setup (5) producing structured test evidence and verdicts Triggers: "runtime validation", "testing strategy", "test strategy", "test design", "verify the app", "integration test", "e2e test", "end-to-end test", "smoke test", "startup check", "write tests", "run tests", "test the migration", "playwright", "testcontainers", "test strategy", "test plan", "runtime gate", "testing phase", "validation phase"