@vkmem/core

A real Valkey server for your test suite, started as a child process in milliseconds. No Docker, no daemon, nothing on disk: the server is the Valkey C code compiled to Go, listening on a loopback port and a Unix socket.

import { VkmemServer } from "@vkmem/core";
import { createClient } from "redis"; // or iovalkey, ioredis, ...

const server = await VkmemServer.start();
const client = createClient({ url: server.url });
await client.connect();
await client.set("k", "v");
await server.flushAll(); // between tests
await client.quit();
await server.close();

start() accepts port, unixSocket (a path, or false), args (extra valkey-server flags such as ["--maxmemory", "64mb"]) and binary. The binary comes from the @vkmem/<platform> optional dependency; VKMEM_SERVER_BIN overrides it.

Not available: BGSAVE/AOF rewrite (no fork), replication, cluster, TLS.