/**
 * VS Code Marketplace registry adapter for source-sync.
 *
 * Owns: paginated VS Code Marketplace query sync, demand-query cursor
 * management, and marketplace-specific page-size configuration. The actual
 * marketplace fetch and item shape are delegated to reference-harvesters.ts.
 *
 * Harvest tiers (run in order per sync call):
 *   Tier 1 — Popularity sweep: top-N by install count. Re-runs on every
 *             scheduled index refresh. Uses a dedicated cursor so progress
 *             does not interfere with other tiers.
 *   Tier 2 — Category sweep: all extensions in categories derived from the
 *             workspace demand profile. Runs after the popularity sweep.
 *   Tier 3 — Alphabetical pagination: full long-tail coverage using the
 *             existing demand-query cursor loop.
 */
import type { SourceDefinition } from "../../../../types.js";
import type { SourceSyncContext, SourceSyncSourceState } from "../types.js";
/**
 * Syncs the VS Code Marketplace source in three tiers:
 *   1. Popularity sweep  — top-N by install count
 *   2. Category sweep    — all extensions in demand-mapped categories
 *   3. Alphabetical loop — full long-tail pagination (existing behaviour)
 */
export declare function syncVsCodeMarketplaceSource(source: SourceDefinition, context: SourceSyncContext): Promise<SourceSyncSourceState>;