Sixteen AI agents build a C compiler that compiles a Linux kernel

Sixteen AI agents created a C compiler, compiling a Linux kernel but requiring significant human oversight. The experiment, costing $20,000 in API fees, used Claude Opus 4.6 agents that independently managed tasks and resolved conflicts via Git. The resulting Rust compiler supports multiple architectures. This development highlights advancements in AI agent capabilities, though limitations in code efficiency and coherence suggest current practical ceilings for autonomous AI coding.