export type CodexThreadActivityStatus = 'running' | 'idle' | 'error';
export type CodexThreadActivitySource = 'app-server' | 'hook';
type CodexThreadActivity = {
    status: CodexThreadActivityStatus;
    turnId: string | null;
    source: CodexThreadActivitySource;
    updatedAt: number;
};
export declare function markCodexThreadRunning(threadId: string, turnId?: string | null, source?: CodexThreadActivitySource): boolean;
export declare function markCodexThreadIdle(threadId: string, turnId?: string | null): boolean;
export declare function markCodexThreadError(threadId: string, turnId?: string | null): boolean;
export declare function readCodexThreadActivity(threadId: string | null | undefined, nowMs?: number): CodexThreadActivity | null;
export declare function readCodexThreadActivityStatus(threadId: string | null | undefined, nowMs?: number): CodexThreadActivityStatus | null;
export {};
//# sourceMappingURL=codex-thread-activity.d.ts.map