/**
 * `agentguard demo`: deterministic simulation with real cryptographic receipt.
 *
 * Output matches agentguard.run/the-block/ exactly. Dollar amounts and
 * agent name are simulated parameters (fixed for reproducibility). The
 * Ed25519 signature, SHA-256 chain hash, and canonical-JSON
 * serialization are REAL: the receipt can be verified with
 * `agentguard verify --trace latest`.
 *
 * No network calls. Fully offline. Deterministic across runs.
 */
export declare function runDemo(argv: string[]): Promise<number>;
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