import type { Adapter, AdapterId } from "./types.js";
/** Mutable registry for embedders, initialized empty unless adapters are
 * provided. Duplicate ids fail loud instead of silently replacing behavior. */
export declare class AdapterRegistry {
    #private;
    constructor(adapters?: Iterable<Adapter>);
    register(adapter: Adapter): this;
    get(id: AdapterId): Adapter | undefined;
    require(id: AdapterId): Adapter;
    list(): Adapter[];
    ids(): AdapterId[];
    spawners(): Record<AdapterId, Adapter["spawn"]>;
}
export declare function createBuiltinAdapterRegistry(): AdapterRegistry;
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