/**
 * Deterministic content hash for a skill directory (for hub lock / drift detection).
 */
/**
 * Stable hash: sorted relative paths, each file hashed; final digest over `path\\0hex\\n` lines.
 */
export declare function computeSkillTreeHash(skillDir: string): Promise<string>;
/** Sync variant for CLI paths that are already small trees. */
export declare function computeSkillTreeHashSync(skillDir: string): string;