Constitutional Completeness in AI Governance Attestation: A Five-Surface Access Architecture for Independent Verifiability

This paper defines constitutional completeness as a property of AI governance attestation systems and derives from it a five-surface access architecture with legally grounded credential separation. A governance attestation is constitutionally complete when: (1) the evidence chain is independently verifiable — accessible to the verifying party directly, without passing through any party with a stake in the outcome; (2) the verification act itself is attested — recorded in the governance record with the same cryptographic guarantees as the evidence being verified; and (3) access authority is derived from legal standing, not from operational role. This paper argues that existing AI governance frameworks conflate operational access with verification access, creating evidence chains that are technically verifiable but legally contestable. The five-surface architecture described here resolves this conflation by deriving each surface's credential model from the legal standing of the party who holds it. Implementation is described for APR-Lite v8.2, a governance substrate for agentic AI systems producing GLOBAL-signed attestation artifacts. The constitutional completeness property, once established, extends the legal defensibility of governance attestations from technical assertions to evidentiary ones.