/**
 * Artifact store factory — picks a backend the way conversation memory does.
 *
 * Backend:    `artifacts.store` → `artifacts.storage` → `STORAGE_TYPE` → local
 * Connection: `artifacts.redisConfig` → conversation memory's `redisConfig`
 *             → `REDIS_URL` / `REDIS_HOST` … environment variables
 *
 * So `STORAGE_TYPE=redis`, which already moves sessions to Redis, moves
 * artifacts there too, on the same pooled connection, with nothing new to
 * set. The one thing never inherited is the KEY PREFIX: artifacts get their
 * own (`neurolink:artifact:`) even when the connection came from the
 * conversation config or `REDIS_KEY_PREFIX`.
 *
 * @module artifacts/artifactStoreFactory
 */
import type { ArtifactStorageConfig, ArtifactStorageType, ArtifactStore, RedisStorageConfig } from "../types/index.js";
/**
 * The Redis connection described by the environment — the same variables
 * conversation memory reads, minus `REDIS_KEY_PREFIX`, which names the
 * conversation keyspace and must not name this one.
 */
export declare function readArtifactRedisConfigFromEnv(): RedisStorageConfig;
/** Which backend `config` and the environment select. */
export declare function resolveArtifactStorageType(config?: ArtifactStorageConfig): ArtifactStorageType;
/**
 * The Redis connection an artifact store should use, with its own key prefix.
 *
 * @param config   `artifacts` constructor config
 * @param fallback conversation memory's `redisConfig`, when one was given
 */
export declare function resolveArtifactRedisConfig(config?: ArtifactStorageConfig, fallback?: RedisStorageConfig): RedisStorageConfig;
/**
 * Build the artifact store `config` asks for.
 *
 * @param config   `artifacts` constructor config
 * @param fallbackRedis conversation memory's `redisConfig`, consulted for the
 *   connection when `config.redisConfig` is absent
 */
export declare function createArtifactStore(config?: ArtifactStorageConfig, fallbackRedis?: RedisStorageConfig): ArtifactStore;