For Golang, I highly recommend yzma to explore this surface. I’ve used it for embedding and summarization (with small models) and just mucking around with integrated LLM BubbleTea TUI idea (with bigger models).

https://github.com/hybridgroup/yzma

And thank you antirez for using your rep and quality output to push this line of evangelism; it is even more important than the software itself.

> ...I'm not sure why people don't try to write more stuff in C to have more control / speed / less dependences.

Codex CLI is written in Rust, which should give comparable raw performance to C/C++. Of course you can care about the "less dependencies" point but this is somewhat less of a concern on a properly maintained project like Codex. That's not so much "wild, out of control" third-party dependencies and closer to the old ideal of proper software componentry.

> Also there is a lot more to imagine, TUI side. The problem is that most projects all copy what they already saw. For instance I just did this in 20 minutes.

This mockup is really nice and the sidebar display gives you a natural way to expose running multiple thinking flows in parallel, at least if you keep them from stepping on each other's toes with code edits (keep them all in read-only "plan" mode or working on completely separate directories/files). That's not so helpful on a 128GB MacBook where a single agentic flow brings you to thermal/power limits already, but it suddenly becomes useful on other hardware (DGX Spark, Strix Halo, lower-RAM machines with SSD offload, multiple nodes with pipeline parallelism) where you have more compute than you could use for single-stream decode.