Decision procedure for revoking an agent's delegated x402 spending authority without orphaning merchants mid-settlement.

Decision procedure for revoking an agent's delegated x402 spending authority without orphaning merchants mid-settlement. Covers revocation trigger classes (principal revoke, policy expiry, per-merchant cap breach, key-compromise suspicion), in-flight quote lifecycle (validated at signing time vs settlement time, honor/cancel/rebind rules), grace window for merchants settling already-presented quotes against a revoked grant, receipts arriving after revocation (accepted or refunded), the