/**
 * In-memory vector store with cosine similarity search.
 *
 * Stores pre-computed attack embeddings and finds nearest neighbors
 * for incoming text. Sub-millisecond for ~2000 vectors at 384 dimensions.
 *
 * @module agent-threat-rules/embedding/vector-store
 */
import type { ATRSeverity } from '../types.js';
export interface VectorEntry {
    readonly id: string;
    readonly vector: Float32Array;
    readonly label: string;
    readonly category: string;
    readonly severity: ATRSeverity;
}
export interface SearchResult {
    readonly entry: VectorEntry;
    readonly similarity: number;
}
export declare class VectorStore {
    private readonly entries;
    constructor(entries?: readonly VectorEntry[]);
    /** Create new store with additional entries (immutable) */
    withEntries(newEntries: readonly VectorEntry[]): VectorStore;
    /**
     * Find top-K nearest neighbors by cosine similarity.
     * Only returns results above the threshold.
     */
    search(query: Float32Array, topK?: number, threshold?: number): readonly SearchResult[];
    size(): number;
}
/** Load pre-computed embeddings from JSON */
export declare function loadVectorEntries(data: readonly {
    id: string;
    vector: number[];
    label: string;
    category: string;
    severity: string;
}[]): VectorEntry[];
//# sourceMappingURL=vector-store.d.ts.map