# Buz - A drop-in replacement for Bun using modern Zig, with sub-1s incremental builds

> Source: <https://ziggit.dev/t/buz-a-drop-in-replacement-for-bun-using-modern-zig-with-sub-1s-incremental-builds/16891#post_17>
> Published: 2026-07-26 03:54:19+00:00

Hi [@jazzzooo](https://ziggit.dev/u/jazzzooo), Buz looks interesting.

I also tinkered with the pre-rewrite Bun code in what I called [Bunsen](https://github.com/raymyers/bunsen), but just from the perspective of catching bugs, not improving the code yet. I think I surfaced new 50 memory bugs. This was a stunt for my talk at [Software Should Work](https://softwareshould.work/) conference last week, showing that adding language-aware toolchain beats agents alone.

I’m not qualified to say what good Zig idioms would be in Bun because I learned Zig just for this, but I’d hoped if I there were other people working on this (like you are) it would be a good way to learn.

Something I could bring to the table is that I’ve worked a lot with disciplined agentic workflows that avoid the pitfalls, so if there’s a desire to experiment with strict harness I could help. I respect that in this community there is a lot of LLM-skepticism, in fact I wish more people had thought like you because we might have had a more balanced rollout overall.