import type { AgentRun } from "./grading/types.js";
/**
 * Memoizes one AgentRun per (workspaceKey, inputId). A nested store avoids any
 * separator-collision between the two components (a flat `${ws} ${id}` or
 * `${ws}-${id}` key can collide, e.g. workspace keys are themselves `ws-N`).
 * Null-prototype maps since both keys can derive from user input.
 */
export declare class EvalCache {
    private readonly runs;
    get(workspaceKey: string, inputId: string, produce: () => Promise<AgentRun>): Promise<AgentRun>;
}