import type { StateDatabase } from "./database.js";
export type AttemptClock = {
    now(): number;
    monotonic(): number;
};
/** Records active execution in the existing database. Wall time never determines the budget. */
export declare class AttemptTime {
    private readonly state;
    private readonly clock;
    private readonly anchors;
    constructor(state: StateDatabase, clock?: AttemptClock);
    start(attemptId: string): void;
    sample(): void;
    stop(attemptId: string): void;
    recover(): void;
    private sampleInterval;
    private openIntervals;
}
export declare function closeRunTime(state: StateDatabase, runId: string): void;
/** Freeze the last host sample when an attempt settles outside its model turn. */
export declare function closeAttemptTime(state: StateDatabase, attemptId: string): void;