/**
 * MCP Tasks Types (spec v2025-11-25)
 *
 * Task state machine for async long-running operations.
 * States: working → completed | failed | cancelled
 *         working → input_required → working (when resuming)
 */
export type TaskState = 'working' | 'input_required' | 'completed' | 'failed' | 'cancelled';
export declare const TERMINAL_STATES: readonly TaskState[];
export declare const DEFAULT_TTL: number;
export declare const DEFAULT_POLL_INTERVAL = 2000;
export interface Task {
    id: string;
    photon: string;
    method: string;
    params?: Record<string, unknown>;
    state: TaskState;
    statusMessage?: string;
    ttl: number;
    pollInterval: number;
    progress?: {
        percent: number;
        message?: string;
    };
    result?: unknown;
    error?: string;
    input?: unknown;
    createdAt: string;
    updatedAt: string;
}
/** MCP wire format — field names match the spec exactly */
export interface TaskWire {
    taskId: string;
    status: TaskState;
    statusMessage?: string;
    createdAt: string;
    lastUpdatedAt: string;
    ttl: number;
    pollInterval: number;
}
/** Convert internal Task to MCP wire format */
export declare function toWireFormat(task: Task): TaskWire;
/** The _meta field for task-related messages */
export declare function relatedTaskMeta(taskId: string): Record<string, unknown>;
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