export interface SpecPin {
    /** Repo key, e.g. `spec/main`. */
    readonly key: string;
    /** Full upstream commit SHA. */
    readonly sha: string;
}
/**
 * Parse vendor/PINNED.txt. Throws if the file is missing or empty.
 * Pure read; no network, no fetch.
 */
export declare function readPins(file?: string): SpecPin[];
/** Look up a single pin by key. */
export declare function getPin(key: string, pins?: SpecPin[]): SpecPin;