WHAT BUN CAN TELL US ABOUT AI, OPEN SOURCE, AND ANTHROPIC

Summary from the TLDR Dev newsletter

Anthropic acquired Bun's maker Oven in December 2025, and the runtime has kept growing fast (npm installs up ~16X to 7.3M/month). However, two shifts stand out: AI now writes most commits (peaking above 80%), while human contributors have roughly halved, with most of the original team gone and external contributions falling sharply.