/**
 * Session Manager Helper Functions and Classes
 * @module @skillsmith/core/session/SessionManager.helpers
 */
import type { CommandExecutor } from './SessionManager.types.js';
/**
 * Memory key patterns for session storage
 */
export declare const MEMORY_KEYS: {
    readonly CURRENT: "session/current";
    readonly SESSION_PREFIX: "session/";
    readonly CHECKPOINT_PREFIX: "checkpoint/";
};
/**
 * Validates a memory key to prevent injection attacks
 */
export declare function validateMemoryKey(key: string): boolean;
/**
 * Default command executor using child_process.spawn
 * Uses argument arrays to prevent command injection
 */
export declare class DefaultCommandExecutor implements CommandExecutor {
    /**
     * @deprecated Legacy string-based execution - use spawn instead
     */
    execute(command: string): Promise<{
        stdout: string;
        stderr: string;
    }>;
    /**
     * Secure spawn-based execution with argument array
     */
    spawn(executable: string, args: string[]): Promise<{
        stdout: string;
        stderr: string;
    }>;
    /**
     * Parse legacy string command and execute via spawn
     */
    private executeWithSpawn;
}
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