import type { Asset } from '../core/types';
export declare class IncrementalCache {
    private readonly cachePath;
    private data;
    private hits;
    private misses;
    constructor(cachePath: string, enabled: boolean, toolVersion?: string);
    /** Returns cached assets if the file is unchanged, else null. */
    get(relPath: string, absPath: string, content: string): Asset[] | null;
    set(relPath: string, absPath: string, content: string, assets: Asset[]): void;
    /** Drop entries for files that no longer exist. */
    prune(livePaths: Set<string>): void;
    flush(): void;
    get stats(): {
        hits: number;
        misses: number;
    };
    private mtime;
}
export declare function cachePathFor(root: string, outDir: string): string;