import type { AbstractHyperedge } from './abstract-hyperedge.js';
/**
 * Backward-compat: snapshot of registered classes keyed by typeTag.
 * Prefer HyperedgeRegistry.forTypeTag() for new code — this snapshot
 * is frozen at module load and won't pick up runtime registrations
 * from tests (the OCP test in Phase 11 registers a mock type after
 * import).
 */
export declare const TYPE_TO_CLASS: object;
/**
 * Thrown by `loadAll` when a relation file has an unknown `type`,
 * malformed structure, or a class that fails to instantiate.
 */
export declare class RelationLoadError extends Error {
    readonly path: string;
    constructor(path: string, message: string);
}
/**
 * Walk a `relations/` directory and load every relation file,
 * returning a Map keyed by comprehensive-id.
 *
 * Returns an empty Map if `relationsDir` doesn't exist or is empty.
 */
export declare function loadAll(relationsDir: string | null | undefined): Map<string, AbstractHyperedge[]>;
/**
 * Namespace bundle for the loader — callers import it as
 * `import { RelationLoader } from './relation-loader.js'` and call
 * `RelationLoader.loadAll(dir)`. The individual functions are also
 * exported directly for tree-shakeable single-call sites.
 */
export declare const RelationLoader: Readonly<{
    loadAll: typeof loadAll;
    loadOne: typeof loadOne;
}>;
/**
 * Load a single relation file. Returns null if the file is missing,
 * unreadable, or doesn't have a recognized `type` field. Throws
 * `RelationLoadError` on malformed content.
 */
export declare function loadOne(path: string): AbstractHyperedge | null;
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