Best of Bun — December 2025

  1. 1
    Article
    Avatar of collectionsCollections·24w

    Anthropic Acquires Bun to Enhance AI Coding Products' Performance and Stability

    Anthropic acquired Bun, the high-performance JavaScript runtime with 7 million monthly downloads and 83,000 GitHub stars. Despite $26 million in VC funding, Bun generated no revenue. The runtime will remain open source under MIT license and integrate into Anthropic's AI coding products like Claude Code and Claude Agent SDK. The acquisition provides Bun with resources to expand its team and accelerate development while supporting Anthropic's AI-driven development infrastructure, as Claude Code reaches $1 billion in run-rate revenue.

  2. 2
    Article
    Avatar of bunBun·22w

    Bun v1.3.5

    Bun v1.3.5 introduces a new Bun.Terminal API for pseudo-terminal (PTY) support, enabling interactive terminal applications. The release adds compile-time feature flags for dead-code elimination in the bundler, improves Bun.stringWidth accuracy for Unicode and emoji, and implements V8 C++ value type checking APIs. It also adds Content-Disposition support for S3 uploads and fixes environment variable expansion in .npmrc files. The update addresses 32 issues including networking bugs (macOS kqueue CPU usage, HTTP proxy authentication), Windows-specific crashes (WebSocket with compression, bunx panics), Node.js compatibility improvements, TypeScript definition fixes, and security issues with trusted dependencies.

  3. 3
    Article
    Avatar of bunBun·23w

    Bun v1.3.4

    Bun v1.3.4 fixes 194 issues and introduces several new features. The release adds URLPattern API for declarative URL matching, fake timers for the test runner to control time in tests, and custom proxy headers in fetch requests. It fixes a critical http.Agent connection pooling bug that prevented connection reuse. Standalone executables now skip loading config files at runtime by default for better performance. The update includes SQLite 3.51.1, console.log %j format specifier support, and numerous bugfixes across testing, bundler, Windows compatibility, Node.js APIs, and FFI.

  4. 4
    Video
    Avatar of awesome-codingAwesome·24w

    Claude buys Bun, and this is really bad for devs...

    Anthropic acquired Bun, the JavaScript runtime built as a faster alternative to Node.js. While Bun will remain open source and MIT licensed, concerns arise about whether future development priorities will serve the JavaScript community or primarily benefit Claude's AI coding capabilities. The acquisition highlights broader tensions around AI companies claiming to replace developers while simultaneously hiring engineers and acquiring development tools. The piece questions the credibility of predictions about AI replacing software engineers within months, comparing them to historically inaccurate tech forecasts.

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