/** Proposal — a proposed system change */
export type Proposal = {
    id: string;
    type: "capability_add" | "capability_remove" | "policy_change" | "schema_change";
    description: string;
    payload: Record<string, unknown>;
    status: "pending" | "approved" | "rejected" | "applied";
    proposedBy: string;
    proposedAt: number;
    approvedBy?: string;
    approvedAt?: number;
    appliedAt?: number;
};
/** Governance engine — manages proposals and change control */
export declare class GovernanceEngine {
    private proposals;
    private approvedActors;
    private applied;
    /** Submit a proposal */
    submit(proposal: Omit<Proposal, "status" | "proposedAt">): Proposal;
    /** Approve a proposal */
    approve(proposalId: string, approver: string): Proposal;
    /** Reject a proposal */
    reject(proposalId: string): Proposal;
    /** Mark a proposal as applied */
    markApplied(proposalId: string): Proposal;
    /** Get a proposal */
    get(proposalId: string): Proposal | undefined;
    /** List all proposals */
    list(): Proposal[];
    /** List pending proposals */
    listPending(): Proposal[];
    /** Add an approved actor */
    addApprover(actor: string): void;
    /** Remove an approved actor */
    removeApprover(actor: string): void;
    /** Check if any changes have been applied */
    hasChanges(): boolean;
    /** Get governance statistics */
    getStats(): {
        total: number;
        pending: number;
        approved: number;
        rejected: number;
        applied: number;
    };
}