bun

Anthropic acquired Bun and used AI agents to rewrite its codebase from Zig to Rust, a massive 1M-line change that passed 99.8% of tests, raising both excitement about AI's potential for infrastructure rewrites and concerns about reviewability, unsafe Rust, and hidden bugs.

Mitchell Hashimoto comments on the increasing fungibility of programming languages, using Bun's rewrite from Zig to Rust as an example, suggesting that languages are no longer a source of lock-in.

Bun, the JavaScript runtime and package manager, has merged a rewrite of its core from Zig to Rust, potentially improving performance and maintainability.

The Bun JavaScript runtime and toolkit has been rewritten in Rust, marking a major change from its original Zig implementation.

A free 30-minute live session featuring the creator of Claude Code and the creator of Bun, demonstrating vibe-coding with Claude.

A developer named Jarred successfully rewrote parts of the Bun runtime in Rust, achieving a 99.8% pass rate on the existing test suite, highlighting a discussion on engineering ambition.

A tutorial video featuring the Head of Claude Code and the creator of Bun demonstrating how to effectively use Claude Code for high-ROI development.

Sumner successfully ported 960,000 lines of Bun runtime code from Zig to Rust using Anthropic's Claude AI, demonstrating the significant efficiency potential of AI in code rewriting.