TL;DR: I built a TypeScript CLI that makes testing LangGraph agents dead simple. No more writing custom scripts or complex SDK setup for every test.

🚨 The Problem

Anyone working with LangGraph agents knows the pain:

• ❌ Writing throwaway scripts just to test one agent

• ❌ Setting up the SDK manually for every experiment

• ❌ Wrestling with JSON configs for simple tests

• ❌ No easy way to stream responses or debug runs

• ❌ You just want to throw one message at the assistant for testing

✅ The Solution

I created LangGraph Client CLI - a comprehensive TypeScript CLI that wraps the LangGraph SDK and makes agent easy for you, and apps like Claude Code

🔧 Key Features

• 🤖 Complete LangGraph coverage: assistants, threads, runs management

• ⚙️ Smart configuration: JSON files + environment variables + CLI overrides

• 📡 Real-time streaming: See agent responses as they happen

• 🚀 Production ready: Secure config, multiple deployment options

• 📝 TypeScript throughout: Full type safety and great DX

🚀 Quick Start

# Install and test instantly
npx langgraph-client-cli@latest assistants list
npx langgraph-client-cli threads create
npx langgraph-client-cli runs stream <thread> <agent> --input '{"messages": [{"role": "human", "content": "Hello!"}]}'

💡 Real-World Usage

Perfect for:

• 🔬 Rapid agent prototyping and testing

• 🤖 Claude Code users who need command-line agent testing

• 😤 Anyone tired of writing boilerplate SDK code

🔗 Links

• NPM: https://www.npmjs.com/package/langgraph-client-cli

• GitHub: https://github.com/nickwinder/langgraph-client-cli

Built this scratching my own itch - hope it helps others in the LangGraph community! Feedback and contributions welcome.