/**
 * Maps Astrid taskId ↔ OpenClaw sessionKey.
 * Session key format: `astrid:task:{taskId}`
 */
export declare class SessionMapper {
    private taskToSession;
    private sessionToTask;
    getOrCreate(taskId: string): string;
    get(taskId: string): string | undefined;
    getTaskId(sessionKey: string): string | undefined;
    end(taskId: string): void;
    activeCount(): number;
}
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