Deterministic decision procedure for screening an incoming signed mandate or permission grant (ERC-8004 style) BEFORE th

Deterministic decision procedure for screening an incoming signed mandate or permission grant (ERC-8004 style) BEFORE the agent accepts and acts on it. Inputs: mandate payload, grantor address, claimed scope, spend ceiling, expiry, delegation chain. Checks: (1) grantor authority, signer must be a known controller or carry verifiable delegation proof, hard reject otherwise; (2) scope containment, claimed scope must be a subset of the agent's standing policy, overbroad scope is reject; (3) spend