export interface PathSafetyOptions {
    rootDir: string;
}
export declare class UnsafePathError extends Error {
    constructor(message: string);
}
/**
 * Resolve a user-supplied relative path against rootDir, rejecting any input
 * that escapes the root via absolute paths, .. segments or NUL bytes.
 */
export declare function resolveOutputPath(userPath: string, options: PathSafetyOptions): string;
/**
 * Sanitize a filename: drop everything before the last / or \ (platform
 * independent), drop control characters, replace any non-[A-Za-z0-9._-] with
 * underscore. Returns "unnamed" if the result is empty.
 */
export declare function sanitizeFilename(name: string): string;
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