import type { SqliteDatabase } from '../db/adapter.js';
export declare const QUERY_TEMPLATE_VERSION: 1;
export declare const QUERY_TEMPLATE_VERSION_V2: 2;
export declare const EMBEDDING_QUERY_INPUT_CONTRACT: "e5-query-passage-v1";
export declare const MAX_QUERY_TEXT_BYTES: number;
export declare const QUERY_EMBEDDING_CACHE_LIMIT = 512;
export interface StoredQueryEmbedding {
    readonly profileId: string;
    readonly queryHash: string;
    readonly dimensions: number;
    readonly vector: Float32Array;
    readonly vectorHash: string;
    readonly createdAt: string;
    readonly lastUsedAt: string;
}
export interface QueryEmbeddingInput {
    readonly profileId: string;
    readonly queryHash: string;
    readonly vector: Float32Array | readonly number[];
}
export interface QueryEmbeddingWriteOptions {
    readonly now?: string;
    readonly expectedGeneration?: number;
}
export declare function normalizeEmbeddingQuery(value: string): string;
/** Hash only the canonical query template; the raw query is never stored. */
export declare function queryEmbeddingHash(value: string): string;
export declare function normalizeCanonicalEmbeddingQuery(value: string): string;
export declare function renderEmbeddingQueryInput(value: string, prefix?: string): string;
/** Hash the complete v2 provider input contract without storing raw query text. */
export declare function queryEmbeddingHashV2(value: string): string;
export declare const embeddingQueryHash: typeof queryEmbeddingHash;
export declare function readQueryEmbeddingInTransaction(database: SqliteDatabase, input: {
    profileId: string;
    queryHash: string;
    now?: string;
}): StoredQueryEmbedding | undefined;
export declare function readQueryEmbedding(database: SqliteDatabase, input: {
    profileId: string;
    queryHash: string;
    now?: string;
}): StoredQueryEmbedding | undefined;
export declare function writeQueryEmbeddingInTransaction(database: SqliteDatabase, input: QueryEmbeddingInput, options?: QueryEmbeddingWriteOptions): StoredQueryEmbedding;
export declare function writeQueryEmbedding(database: SqliteDatabase, input: QueryEmbeddingInput, options?: QueryEmbeddingWriteOptions): StoredQueryEmbedding;
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