import type { MissionRunnerLockArtifact, MissionState } from "../runtime-types.js";
export declare const RUNNER_HEARTBEAT_INTERVAL_MS = 5000;
export declare const RUNNER_HEARTBEAT_TIMEOUT_MS = 20000;
export declare function runnerLockFile(cwd: string, missionId: string): string;
export declare function isPidAlive(pid: number): boolean | undefined;
export declare function readRunnerLock(cwd: string, missionId: string): MissionRunnerLockArtifact | undefined;
export declare function lockHeartbeatExpired(lock: MissionRunnerLockArtifact): boolean;
export declare function upsertRunnerLockHeartbeat(cwd: string, missionId: string): void;
export declare function releaseRunnerLock(cwd: string, missionId: string, reason: string): void;
export declare function acquireRunnerLock(cwd: string, mission: MissionState): Promise<{
    ok: true;
    lock: MissionRunnerLockArtifact;
    recoveredStale: boolean;
} | {
    ok: false;
    reason: string;
    lock?: MissionRunnerLockArtifact;
}>;
export declare function hasMissionExecutionStarted(cwd: string, mission: MissionState): boolean;
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