Buz – A fork of Bun using modern Zig, with sub-1s incremental builds

Buz is a work-in-progress fork of Bun rewritten in Zig that aims to be a drop-in replacement with improved code quality and sub-1 second incremental builds. The project removes over 11,000 lines of dead code and modernizes the codebase while maintaining compatibility with Bun's test suite, though many tests still need to pass. The developer plans to use LLMs extensively to help rewrite subsystems and reduce technical debt, with the goal of creating a maintainable codebase within weeks or months.