/**
 * Key-value dedup store abstraction.
 *
 * PageAnalyzer uses multiple dedup collections to avoid redundant test
 * generation and finding reporting.  This interface allows each consumer
 * to provide its own storage backend:
 *
 * - Extension: chrome.storage.local (survives service-worker restarts,
 *   no memory pressure)
 * - Server runner: in-memory Sets (no size constraints)
 */
export interface DedupStore {
    /** Check if a key exists in the named collection. */
    has(collection: string, key: string): Promise<boolean>;
    /** Add a key to the named collection. */
    add(collection: string, key: string): Promise<void>;
}
/**
 * Default in-memory implementation.  Used by the server runner and as
 * a fallback when no store is provided.
 */
export declare class InMemoryDedupStore implements DedupStore {
    private collections;
    private getCollection;
    has(collection: string, key: string): Promise<boolean>;
    add(collection: string, key: string): Promise<void>;
}
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