export type GetEnvFn = (name: string) => string | undefined;
export interface PrContext {
    number: number;
    baseSha: string | null;
    headSha: string | null;
}
/**
 * Resolve the PR context, or null when no PR signal is present.
 *
 * @param getEnv  Optional environment-variable getter. Defaults to reading
 *                from `process.env`, but tests pass a deterministic map.
 */
export declare function detectPrContext(getEnv?: GetEnvFn): PrContext | null;
//# sourceMappingURL=pr-detect.d.ts.map