/**
 * Hybrid semantic recall — merges FTS keyword results with vector KNN using
 * reciprocal-rank fusion, then applies the trust (status) penalty so VERIFIED
 * memories outrank STALE ones regardless of similarity.
 *
 * Degrades gracefully: no provider / no vec extension → plain FTS search.
 */
import type { MemoryStore } from "../db/store.js";
import type { MemoryEntry, MemorySearchOptions } from "../types.js";
import { type EmbeddingProvider } from "./provider.js";
/** Embed and index one memory (call after write/approve). No-op without a provider. */
export declare function indexMemory(store: MemoryStore, entry: MemoryEntry): Promise<boolean>;
/** Backfill embeddings for all memories missing one. Returns count indexed. */
export declare function reindexAll(store: MemoryStore): Promise<{
    indexed: number;
    provider: EmbeddingProvider | null;
}>;
/** Hybrid search: FTS + KNN fused, status-aware. Falls back to FTS-only. */
export declare function hybridSearch(store: MemoryStore, opts: MemorySearchOptions): Promise<{
    results: MemoryEntry[];
    semantic: boolean;
}>;