@adonis-agora/agent/dist/src/rag/lexical-retriever.js

Governed, durable-backed AI agent (chat + tool-calling + governance) for AdonisJS — part of the Agora ecosystem.

/**
 * A {@link Retriever} over a store's own full-text index — the lexical half of a hybrid search, next to
 * an {@link import('./embedding-retriever.js').EmbeddingRetriever} over the same store:
 *
 * ```ts
 * const store = new PgLexicalVectorStore(db, { dimension: 1536 })
 * const retriever = new HybridRetriever([
 *   new EmbeddingRetriever(embedder, store),
 *   new LexicalRetriever(store),
 * ])
 * ```
 *
 * Embeds nothing, so it reports no usage. `minScore` is not forwarded: a text rank is not a similarity,
 * and a floor tuned for cosine would mean nothing on it.
 */
export class LexicalRetriever {
    store;
    constructor(store) {
        this.store = store;
    }
    async retrieve(query, options = {}) {
        return this.store.searchText(query, {
            topK: options.topK ?? 5,
            ...(options.filter !== undefined ? { filter: options.filter } : {}),
        });
    }
}
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