kkRPC

kkrpc lets two JavaScript or TypeScript runtimes call each other through type-safe proxy objects. Expose an API on one side, wrap a transport on the other side, and call remote functions, nested methods, properties, and callbacks like local code.

The stable API is built on native Transport<RPCMessage> objects. The core entry is browser-safe; runtime transports and optional peer dependencies live in subpath exports.

Features

Type-safe proxies

Remote APIs keep TypeScript completion and checking, including nested methods and properties.

Bidirectional channels

Evented transports let both sides expose APIs and pass callback arguments.

Native transports

Use stdio, HTTP, WebSocket, workers, iframes, Chrome extension ports, Electron, Tauri, Socket.IO, RabbitMQ, Kafka, Redis Streams, or NATS.

Browser-safe core

kkrpc and kkrpc/browser avoid Node-only imports. Optional integrations stay behind explicit subpaths.

Validation, middleware, metadata

Standard Schema validation, interceptor chains, and request metadata are available as plugins and channel options.

Transfer, relay, inspector

Transfer ownership where supported, bridge two transports, or observe traffic.

Runtime Coverage

Runtime or system	Entry points
Browser and Web Worker	kkrpc/browser, kkrpc/worker, kkrpc/iframe
Node.js, Deno, Bun processes	kkrpc/stdio, kkrpc/deno
HTTP and WebSocket servers	kkrpc/http, kkrpc/ws, kkrpc/ws/hono, kkrpc/ws/elysia
Desktop apps	kkrpc/electron, kkrpc/tauri
Browser extensions	kkrpc/chrome-extension
Message buses	kkrpc/socketio, kkrpc/rabbitmq, kkrpc/kafka, kkrpc/redis-streams, kkrpc/nats

AI Support

The repository includes agent skill docs for AI coding assistants. They describe the stable API, package layout, and language interop implementations.

cp -r skills/kkrpc ~/.claude/skills/
cp -r skills/kkrpc-migration ~/.claude/skills/
cp -r skills/interop ~/.claude/skills/

See the skills/ directory for details.