I love these. Coding agents aren't very difficult to build, it's a TUI + tools + getting a nice agent loop working. The hardest part seems to be supporting all of the different providers and model quirks. What is interesting is seeing the experimentation: some provide tons of tools, others provide a single python interpreter and have the agent use tools via sandboxed python scripts, others use minimal tools and lean on bash. Personally I want a harness that gives a ton of control to the user to let them steer the LLM, less agent and more augmentation. Maybe I'll have to build it myself. If anyone has ideas, let me know.
I'm working on one right now where nearly everything can be expressed as a combination of workflows. There will be some built-in agent types out of the box but all the Lego pieces are there if you want to put together something different.
What language are you building this in? I’m interested but trying to stay away from js world for security reasons.
Pi.dev is pretty good in giving tons of control to the use and has extensions that you can easily build.
Although people are complaining about its RAM usage in this thread, I haven't bothered to check how much RAM it uses.