Bun is joining Anthropic

TLDR: Bun has been acquired by Anthropic. Anthropic is betting on Bun as the infrastructure powering Claude Code, Claude Agent SDK, and future AI coding products & tools.

- What doesn't change:

- Bun stays open-source & MIT-licensed

- Bun continues to be extremely actively maintained

- The same team still works on Bun

- Bun is still built in public on GitHub

- Bun's roadmap will continue to focus on high performance JavaScript tooling, Node.js compatibility & replacing Node.js as the default server-side runtime for JavaScript

- Claude Code ships as a Bun executable to millions of users. If Bun breaks, Claude Code breaks. Anthropic has direct incentive to keep Bun excellent.

What changes:

- We will help make coding tools like Claude Code & Claude Agent SDK faster & smaller

- We get a closer first look at what's around the corner for AI coding tools, and make Bun better for it

- Bun will ship faster.

[...]

Anthropic is investing in Bun as the infrastructure powering Claude Code, Claude Agent SDK, and future AI coding products. Our job is to make Bun the best place to build, run, and test AI-driven software — while continuing to be a great general-purpose JavaScript runtime, bundler, package manager, and test runner.