import type { FileChange, ToolkitManifest } from "./types.js";
/** Hash a file's content with SHA-256 */
export declare function hashFile(filePath: string): string;
/** Walk a directory recursively, returning relative paths */
export declare function walkDir(dir: string): string[];
/** Load existing manifest if present */
export declare function loadManifest(targetDir: string): ToolkitManifest | null;
/** Save manifest to target directory */
export declare function saveManifest(targetDir: string, manifest: ToolkitManifest): void;
/** Check if a directory has a pi-extension-toolkit installation */
export declare function isToolkitInstalled(targetDir: string): boolean;
/** Get installed version, or null */
export declare function getInstalledVersion(targetDir: string): string | null;
/** Create a backup of target files before overwriting */
export declare function createBackup(targetDir: string, files: string[]): string | null;
/**
 * Compute file changes between current state and expected source state.
 *
 * Modes:
 * - `"create"`: Compares template files against target (all files are new or skipped)
 * - `"retrofit"`: Compares existing files against known manifest hashes
 */
export declare function computeChanges(targetDir: string, sourceFiles: Map<string, string>, // relativePath -> sourceHash
operation: "create" | "retrofit", force: boolean): FileChange[];
/**
 * Apply file changes computed by computeChanges().
 * Returns lists of created, updated, skipped, and conflicted files.
 */
export declare function applyChanges(targetDir: string, sourceDir: string, sourceFiles: Map<string, string>, changes: FileChange[], backup: boolean): {
    created: string[];
    updated: string[];
    skipped: string[];
    conflicts: string[];
    backupDir: string | null;
};
/**
 * Build a manifest for all source files so future runs can detect user modifications.
 */
export declare function buildManifest(sourceFiles: Map<string, string>, version: string, operation: "create" | "retrofit"): ToolkitManifest;