/**
 * QA360 Pack v2 Loader
 *
 * Loads and parses pack.yml v2 files from the filesystem.
 * Supports environment variable substitution with ${VAR} and ${VAR:-default} syntax.
 */
import { PackConfigV2, PackValidationResultV2, ValidationError } from '../types/pack-v2.js';
export interface PackLoadResult {
    success: boolean;
    pack?: PackConfigV2 | any;
    validation?: PackValidationResultV2;
    valid?: boolean;
    error?: Error;
    sourcePath?: string;
    format?: 'v1' | 'v2' | 'unknown' | 'legacy';
    migrated?: boolean;
    changes?: string[];
    warnings?: string[];
    foundFiles?: string[];
    missingFiles?: string[];
    validationErrors?: ValidationError[];
}
export declare class PackLoaderV2 {
    private cache;
    /**
     * Load a pack configuration from a file path
     */
    load(packPath: string, options?: {
        validate?: boolean;
        checkFilesExist?: boolean;
        useCache?: boolean;
        migrate?: boolean;
    }): Promise<PackLoadResult>;
    /**
     * Load and validate in one step
     */
    loadAndValidate(packPath: string, options?: {
        checkFilesExist?: boolean;
    }): Promise<PackLoadResult>;
    /**
     * Load multiple packs from a directory
     */
    loadFromDir(dirPath: string, options?: {
        pattern?: string;
        validate?: boolean;
        checkFilesExist?: boolean;
    }): Promise<PackLoadResult[]>;
    /**
     * Load from a YAML string (useful for testing or dynamic configs)
     */
    loadFromString(yamlContent: string, options?: {
        validate?: boolean;
        filename?: string;
    }): Promise<PackLoadResult>;
    /**
     * Clear the cache
     */
    clearCache(path?: string): void;
    /**
     * Get cache size
     */
    getCacheSize(): number;
}