/**
 * @file `detectPnpmVersion(content)` — scans a pnpm-lock.yaml for its
 *   `lockfileVersion:` line and returns `5`, `6`, or `9`. Falls back to `9`
 *   (the latest) when no recognizable marker is present. Matches socket-btm's
 *   smol-manifest internal `detectPnpmVersion`.
 */
export declare function detectPnpmVersion(content: string): 5 | 6 | 9;
