import type { SessionPlan } from "../store/plan.js";
import type { ToolCall } from "../types.js";
export interface ResponderParentAccepted {
    readonly ok: true;
    readonly taskId: string | undefined;
    readonly source: "declared" | "active-fallback" | "none";
}
export interface ResponderParentRejected {
    readonly ok: false;
    readonly reason: string;
}
export type ResponderParentResolution = ResponderParentAccepted | ResponderParentRejected;
export declare function readDeclaredParentTaskId(call: ToolCall): string | undefined;
export declare function resolveResponderParent(input: {
    readonly plan: SessionPlan | undefined;
    readonly declared: string | undefined;
    readonly activeForegroundTaskIds: readonly string[];
}): ResponderParentResolution;
export declare function isExplicitResponderDelegation(call: ToolCall): boolean;
export declare function delegationTaskTitle(call: ToolCall): string;