Effect and React with the help of many others in this channel. I keep adding to the repo and explore new concepts (for me new since new to TS and Effect) in test code. Feel free to peek at https://github.com/atooni/zio-insight-ui. metrics branch to get the backend API straight. One thing I am exploring is to swap out my backend layer for a mock with static data, so I can run the UI without a server.