Testing and Validation Harness

The repository ships deterministic validation harnesses by phase.

Common Pattern

• phaseX-run-all.sh orchestration.
• scenario-specific scripts.
• matrix builders producing JSON + CSV gate outputs.

Current Key Regression Gates

• Phase 10 non-smoke system behavior.
• Phase 11 migration and docs/sandbox end-to-end flow.

Contribution Guidance

• Keep scenario scripts idempotent.
• Surface deterministic artifact paths and machine-readable summary outputs.
• Prefer explicit runtime env controls over hidden defaults.