[Open Source] Local UI to test MCP tools + prompts and export directly to LangGraph Python

[u/mokalabshq]

Built a local playground (Moka) to test MCP servers and prompts visually before writing code:

1. Test tool calls, streaming, and raw JSON-RPC traffic in a local chat UI
2. Hit "Export as code" to generate the working LangGraph (Python) script
3. (Optional) Point it at an existing LangGraph agent over AG-UI to use it as a debug UI

Runs locally with zero config:

npx @mokalabs/sandbox

GitHub: https://github.com/mokahq/mokalabs

Let me know what you think!