/**
 * Detects the nearest package.json for a file in a monorepo.
 * Caches lookups per directory to avoid repeated filesystem reads.
 */
export declare class PackageDetector {
    private repoRoot;
    private cache;
    constructor(repoRoot: string);
    /**
     * Find the nearest package.json for a file and return its `name` field.
     * @param relativePath - File path relative to repo root
     * @returns Package name (e.g., '@epicdm/flowstate-cli') or undefined
     */
    detect(relativePath: string): string | undefined;
    /** Clear the internal cache */
    clear(): void;
}
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