# Verification

Framework defined in `docs/architecture/27-verification-strategy.md` and detailed in ARCH-37.

- `matrix.yaml` — the Verification Matrix per ARCH-37 §2. Every architectural claim → verification instrument(s) + owner + cadence.
- `claims-registry.yaml` — Assurance Claim Registry per ARCH-43 §2.
- `evidence/` — signed evidence artifacts per ARCH-43 §3.

## Rules

- Every claim in `claims-registry.yaml` must have ≥ 1 verification instrument in `matrix.yaml` (Consistency Verification C-3 blocks otherwise, ARCH-41).
- Every evidence artifact is signed by its producing role.
- Evidence has a `valid_until` window; stale evidence transitions the claim to "unsupported" (ARCH-43 §6).
- Weights, thresholds, and windows are ceremony-controlled (ARCH-22 C-C class).

**Population.** The matrix and registry are populated per subsystem as Implementation Readiness Assessments (ARCH-53) are signed. This is a tracked ARCH-60 R-5 Conditional.