import type { SubagentAuthorizationEvent, SubagentAuthorizationEventHookPayload } from "#channel/types.js";
import type { WorkflowToolAgentRequest } from "#execution/tools/workflow/messages.js";
import type { SessionInboxAddress } from "#execution/session-inbox/address.js";
import { type JsonValue } from "#shared/json.js";
/** Durable lifecycle status for one unit of background work. */
export type TaskStatus = "working" | "input_required" | "completed" | "failed" | "cancelled";
/** Executor-neutral identity shown for one task. */
export interface TaskMetadata {
    readonly kind: string;
    readonly name: string;
    readonly [key: string]: JsonValue | undefined;
}
export declare function sameTaskMetadata(left: TaskMetadata, right: TaskMetadata): boolean;
export type TaskOutput = {
    readonly type: "result";
    readonly data: JsonValue;
} | {
    readonly type: "error";
    readonly data: JsonValue;
};
/** An outstanding request carried opaquely by the task lifecycle. */
export type TaskInputRequest = JsonValue;
export interface TaskUsage {
    readonly cacheReadTokens: number;
    readonly cacheWriteTokens: number;
    readonly costUsd?: number;
    readonly inputTokens: number;
    readonly outputTokens: number;
}
/** Reads valid provider usage without making task settlement depend on it. */
export declare function readTaskUsage(value: unknown): TaskUsage | undefined;
/** Reads the request identity from one opaque request. */
export declare function readTaskInputRequestId(request: TaskInputRequest): string | undefined;
interface TaskViewBase {
    readonly taskId: string;
    readonly metadata: TaskMetadata;
    /** Retained for accounting, excluded from model-visible JSON. */
    readonly usage?: TaskUsage;
}
export type TaskView = TaskViewBase & ({
    readonly status: "working";
    readonly inputRequests?: never;
    readonly lastOutput?: never;
} | {
    readonly status: "input_required";
    readonly inputRequests: readonly TaskInputRequest[];
    readonly lastOutput?: never;
} | {
    readonly status: "completed";
    readonly inputRequests?: never;
    readonly lastOutput: Extract<TaskOutput, {
        type: "result";
    }>;
} | {
    readonly status: "failed";
    readonly inputRequests?: never;
    readonly lastOutput: Extract<TaskOutput, {
        type: "error";
    }>;
} | {
    readonly status: "cancelled";
    readonly inputRequests?: never;
    readonly lastOutput?: never;
});
/** Admission, cancellation, and input state changes for a background invocation. */
export type TaskCommand = {
    readonly kind: "reject-dispatch";
    readonly data: JsonValue;
} | {
    readonly kind: "cancel";
    readonly usage?: TaskUsage;
} | {
    readonly kind: "require-input";
    readonly inputRequests: readonly TaskInputRequest[];
} | {
    readonly kind: "ready";
} | {
    readonly kind: "answered";
    readonly requestIds: readonly string[];
};
export interface TaskCommandHookPayload {
    readonly kind: "task-command";
    readonly command: TaskCommand;
}
/** One human answer routed through the task that owns the blocked executor. */
export interface TaskInboundAnswerInput {
    readonly auth?: unknown;
    readonly childContinuationToken: string;
    readonly childSessionInbox?: SessionInboxAddress;
    readonly childResponseUrl?: string;
    readonly inputResponses: readonly {
        readonly optionId?: string;
        readonly requestId: string;
        readonly text?: string;
    }[];
    readonly kind: "input-response";
    readonly taskId: string;
}
export type TaskRunInboundPayload = TaskCommandHookPayload | TaskInboundAnswerInput;
/** Generic task-owned request sent through the parent session payload. */
interface TaskInputRequestDeliveryBase {
    readonly replyTo: string;
    readonly sequence: number;
    readonly stepIndex: number;
    readonly taskId: string;
    readonly turnId: string;
}
export type TaskInputRequestDelivery = TaskInputRequestDeliveryBase & ({
    readonly request: TaskInputRequest;
    readonly requests?: never;
} | {
    readonly request?: never;
    readonly requests: readonly TaskInputRequest[];
});
/**
 * Child authorization event projected through the parent channel. Display
 * only: the authorization callback completes against the child directly.
 */
export interface TaskAuthorizationEventDelivery {
    readonly hookPayload: SubagentAuthorizationEventHookPayload;
    readonly taskId: string;
}
/** Stable id shared by one authorization attempt's events, used to dedupe deliveries. */
export declare function taskAuthorizationRequestId(event: SubagentAuthorizationEvent): string;
/**
 * Agent spawn or settlement a task-owned workflow tool run asks its parent to
 * apply, forwarded after task admission. `replyTo` is the run's reply hook.
 */
export interface TaskAgentRequestDelivery {
    readonly replyTo: string;
    readonly request: WorkflowToolAgentRequest;
    readonly taskId: string;
}
export declare function isTerminalTaskStatus(status: TaskStatus): boolean;
export declare function isReadyTaskStatus(status: TaskStatus): boolean;
export {};