import type { DispatchPlanInput } from "./index.js";
import type { DispatchResult } from "./types.js";
export type DispatchBackendName = "fabric" | "pi-delegate";
export type DispatchBackendResult = DispatchResult & {
    readonly backend: DispatchBackendName | "plan-only";
};
/** An injected host adapter; this module never discovers or imports Fabric. */
export interface FabricHost {
    dispatch(input: DispatchPlanInput): Promise<DispatchResult>;
}
export interface DispatchBackend extends FabricHost {
    readonly name: DispatchBackendName | "plan-only";
}
export interface DispatchBackendOptions {
    readonly backend?: DispatchBackendName;
    readonly fabricHost?: FabricHost;
}
/** Explicit selection never falls back to a different executor. */
export declare function selectDispatchBackend(options: DispatchBackendOptions, delegate: DispatchBackend): DispatchBackend;