## Summary
- add Spec 212 planning artifacts for test authoring constitution and review guardrails
- expand `TEST-GOV-001` and sync the SpecKit spec/plan/tasks/checklist templates plus contributor guidance
- define the canonical review checklist outcomes and record low-impact and higher-cost validation examples
## Validation
- docs/workflow only; no runtime Pest or Sail test lanes were run
- validation is recorded in `specs/212-test-authoring-guardrails/spec.md` and `specs/212-test-authoring-guardrails/quickstart.md`
Co-authored-by: Ahmed Darrazi <ahmed.darrazi@live.de>
Reviewed-on: #245
