| ALCOA+ principle | Invariant support |
|---|---|
| Attributable | Every action records the actor (human/AI/system) and organization |
| Legible | Structured records; human-readable audit trail |
| Contemporaneous | Audit entries written atomically with the business change |
| Original | Source records retained; exports are derived copies |
| Accurate | Server-side completeness gates + versioned metric contract |
| Complete | Reason-for-change on regulated edits; linked records |
| Consistent | Enforced lifecycle ordering + hash-chained sequence |
| Enduring | Append-only audit + signatures |
| Available | Verifiable on demand; exportable |
Compliance & Validation
Data integrity (ALCOA+)
How Invariant supports ALCOA+ data-integrity principles.
Authoritative statement: Validation Accelerator Pack artifact A8.