/**
 * Sync Policy and Safety Gates (TRL-334)
 *
 * Defines safety policies for realtime sync to prevent accidental
 * mutations, deletions, and corruptions from propagating between environments.
 */
import type { NackReason } from '../sync/types.js';
export interface SyncPolicy {
    /** Require manual approval for destructive ops from remote. */
    blockRemoteDestructive: boolean;
    /** Require confirmation for bulk deletes (>N entities). */
    bulkDeleteThreshold: number;
    /** Block sync if local has uncommitted changes. */
    requireCleanWorkingTree: boolean;
    /** Quarantine suspicious ops for review. */
    quarantineSuspicious: boolean;
}
export interface ChangeRisk {
    risk: 'safe' | 'elevated' | 'destructive' | 'critical';
    reason: string;
}
export interface QuarantineEntry {
    id: string;
    timestamp: string;
    sourcePeerId: string;
    message: any;
    risk: ChangeRisk;
    reason: NackReason;
    reviewed: boolean;
}
/**
 * Default policies by environment type.
 */
export declare const DEFAULT_POLICIES: Record<string, SyncPolicy>;
/**
 * Get sync policy from environment or default.
 */
export declare function getSyncPolicy(): SyncPolicy;
/**
 * Classify change risk based on message content.
 */
export declare function classifyChangeRisk(message: any): ChangeRisk;
/**
 * Check if a message should be blocked by sync policy.
 */
export declare function shouldBlockMessage(message: any, policy: SyncPolicy): {
    blocked: boolean;
    reason?: NackReason;
    details?: string;
};
/**
 * Quarantine store for suspicious changes.
 */
export declare class QuarantineStore {
    private entries;
    private storagePath;
    constructor(storagePath?: string);
    /**
     * Add an entry to quarantine.
     */
    add(message: any, sourcePeerId: string, reason: NackReason): string;
    /**
     * Get all quarantine entries.
     */
    getAll(): QuarantineEntry[];
    /**
     * Get a specific quarantine entry.
     */
    get(id: string): QuarantineEntry | undefined;
    /**
     * Mark an entry as reviewed.
     */
    markReviewed(id: string): void;
    /**
     * Remove an entry from quarantine.
     */
    remove(id: string): void;
    /**
     * Load quarantine from disk.
     */
    private load;
    /**
     * Save quarantine to disk.
     */
    private save;
}
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