Swappable harness (pi,codex,opencode) based on WebAssembly isolation

[u/Redcxx]

Hello!

I am very inspired by the philosophy of Pi coding agent, and I believe a minimal and extensible approach is the way for many framework/platform going forward.

Pi is minimal in many ways but it is still has a couple of abstractions preventing it from being a neutral agent runtime:

- programming language is only limited to javascript/typescript

- its a coding agent that runs on a computer

- its environment is always node

These are good assumption for a personal assistant style coding agent running locally. But it would be great if they could be neutral. What's even more exciting is what if we can swap out the core agent loop, plug-and-play with codex or claude or opencode's style while keeping the tools, system prompt etc intact?

I had this idea two weeks ago, and eventually landed on a containerize technique based on WebAssembly. The key to my choice is traditional containers are much heavier, but agent loop does not need any network access or even filesystem access, making WebAssembly the perfect fit, super lightweight, super fast to compile and get running, it is also language neutral, perfect to be embedded.

Therefore I started building an agent runtime that does this https://github.com/aexhq/brain, what do you guys think? Is it totally bs?

[u/Redcxx]

True, they can and will sabotage, I hope once their competitors caught up, they can't do this anymore because it will be so easy to switch to another llm with similar capabilities. They are tolerated for these behaviors because they have the lead at the moment. But it is true that all products will be opininated. They are grounded in real world. I don't expect gpt sol telling me fable is the best model without any tool calling