/**
 * `agentguard anchor`: externally timestamp the head of a tenant's signed
 * decision chain via a public timestamp calendar (OpenTimestamps).
 *
 * Zero data plane: ONLY the 32-byte SHA-256 of the chain head is submitted.
 * Opt-in: does nothing unless an anchor is selected via --type or
 * AGENTGUARD_ANCHOR. OFF by default so existing users are unaffected.
 */
export declare function runAnchor(argv: string[]): Promise<number>;
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