/**
 * npm registry adapter for source-sync.
 *
 * Owns: resumable npm changes-feed sync and npm-specific status messaging.
 */
import type { SourceDefinition } from "../../../../types.js";
import type { SourceSyncContext, SourceSyncSourceState } from "../types.js";
/**
 * Syncs the npm registry using the official replicate changes feed for
 * resumable incremental indexing.
 */
export declare function syncNpmRegistrySource(source: SourceDefinition, context: SourceSyncContext): Promise<SourceSyncSourceState>;