/**
 * Fact checker — extracts verifiable claims from agent output and validates them.
 * Currently supports file/directory path verification via fs.existsSync.
 */
export interface FactClaim {
    type: 'file-path';
    value: string;
    verified: boolean;
    evidence?: string;
}
export interface FactCheckResult {
    claims: FactClaim[];
    verifiedCount: number;
    totalCount: number;
    verifiedRate: number;
}
/**
 * Extract file path claims from agent output text.
 */
export declare function extractPathClaims(output: string): string[];
/**
 * Check facts in agent output by verifying file paths exist in cwd.
 */
export declare function checkFacts(output: string, cwd: string): FactCheckResult;