/**
 * @copyright Sister Software
 * @license AGPL-3.0
 * @author Teffen Ellis, et al.
 *
 *   The lookup table that resolves an adapter id to its implementation.
 *
 * `mailwoman corpus run <adapter-id>` and the `corpus build` pipeline both resolve `<adapter-id>`
 * through this registry. Adapters do not self-register at module load; `adapters.ts` adds each one
 * explicitly, so the dependency graph stays traceable.
 */
import type { CorpusAdapter } from "#types";
/**
 * Lookup table for corpus adapters.
 */
export interface AdapterRegistry {
    /**
     * Add an adapter.
     *
     * @throws If `adapter.id` is already registered.
     */
    register(adapter: CorpusAdapter): void;
    /**
     * Return the adapter for `id`, or `undefined`.
     */
    get(id: string): CorpusAdapter | undefined;
    /**
     * All registered adapters, in insertion order.
     */
    list(): readonly CorpusAdapter[];
    /**
     * Convenience: ids only, in insertion order.
     */
    ids(): readonly string[];
}
/**
 * Default in-memory registry.
 *
 * The runner constructs one per invocation.
 * The CLI re-uses {@linkcode defaultAdapterRegistry}, which `adapters.ts` populates.
 */
export declare class InMemoryAdapterRegistry implements AdapterRegistry {
    #private;
    register(adapter: CorpusAdapter): void;
    get(id: string): CorpusAdapter | undefined;
    list(): readonly CorpusAdapter[];
    ids(): readonly string[];
}
/**
 * Process-wide default registry, populated by `adapters.ts`.
 *
 * A test constructs its own {@linkcode InMemoryAdapterRegistry} rather than mutating this one.
 */
export declare const defaultAdapterRegistry: InMemoryAdapterRegistry;
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