expo-kevy

kevy embedded in React Native via Expo Modules — the real native engine in your app, synchronous JSI calls (the MMKV shape), plus everything an mmap KV doesn't have: real TTL, hashes/lists/zsets, pub/sub, cmd() to every verb, and persistence you can read (AOF + snapshots). Works in Expo apps and — via expo-modules-core — in bare React Native apps.

npx expo install expo-kevy

import { open } from "expo-kevy";
import * as FileSystem from "expo-file-system";

const db = open({ dir: `${FileSystem.documentDirectory}kevy` });

db.set("session:7f3a", "payload", { ttlMs: 3_600_000 }); // scalar fast path
db.getText("session:7f3a");

db.subscribe("room", (payload, channel) => { /* a microtask after publish */ });
db.publish("room", "hi"); // → engine + local receiver count

// The escape hatch: every verb, RESP semantics, errors as VALUES.
const reply = db.cmd("ZADD", "board", "42", "alice");

db.close();

open() is synchronous, set/get ride the C ABI's scalar fast path — that is the MMKV lane. Typed methods throw on a protocol error; cmd() returns KevyError as a value. The native shells (Swift over Kevy.xcframework, Kotlin over libkevy_jni) are bare pipes: the whole typed surface lives in TypeScript, same API shape as @goliapkg/kevy-node and @goliapkg/kevy (wasm).

Docs: https://kevy.golia.jp.