I vibe-coded a C compiler that can build SQLite

A while back, Claude Opus built a pretty ambitious compiler. I didn't set out to do anything nearly as ambitious as Anthropic's. They were targeting multiple CPU architectures and they wanted to be able to compile a bootable Linux kernel. (I'd actually forgotten about that project until I started posting some screenshots of the work below to social media and someone reminded me.) Last night, as I was getting ready for bed I was reaching for some project to /loop support and tool use in Evener, our ~new agentic harness. I popped open the mobile UI on my phone and typed "Your job is to implement a standards-compliant ARM64 C compiler for macOS in Swift." Evener asked me a couple of questions. I clarified my intent a little bit: "I'm great with radical task decomposition. You should use recursive subagents to manage context and complexity.Should structure the project in whatever sane way you want. You should work fully autonomously And do not need to ask me questions." And then I set a…