export interface RunnerScriptCache {
    ensureRunnerScript(): Promise<string>;
    cleanup(): Promise<void>;
}
export declare function createRunnerScriptCache(tempRoot: string): RunnerScriptCache;
/** @internal Test-only initializer for isolated artifact assertions. */
export declare function createRunnerScriptInitializer(tempRoot: string): () => Promise<string>;
export declare const ensureRunnerScript: () => Promise<string>;