/**
 * HigherUp Unified Security Engine (Local Copy for Agent)
 * Centralized logic for command validation and safety checks across the ecosystem.
 */
export interface SafetyCheckResult {
    safe: boolean;
    reason?: string;
    severity: 'low' | 'medium' | 'high' | 'critical';
    requiresConfirmation: boolean;
}
export declare class SafetyEngine {
    private static readonly DESTRUCTIVE_COMMANDS;
    private static readonly DANGEROUS_PATTERNS;
    private static readonly PROTECTED_PATHS;
    /**
     * Comprehensive command validation
     */
    static validateCommand(command: string): SafetyCheckResult;
    /**
     * File operation safety check
     */
    static validateFileOperation(operation: 'read' | 'write' | 'delete', targetPath: string): SafetyCheckResult;
}
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