Redis Creator Lets Claude Code Build a Z80 Emulator From Scratch — And It Nailed It
Redis Creator Lets Claude Code Build a Z80 Emulator From Scratch — And It Nailed It
antirez.com
Implementing a clear room Z80 / ZX Spectrum emulator with Claude Code - <antirez>
Salvatore Sanfilippo (antirez, creator of Redis) gave Claude Code detailed Z80/ZX Spectrum specs and documentation upfront — like a real engineer would get — then stepped back. In 20-30 minutes, with zero human steering, it produced a 1,200-line C emulator that passed the notoriously strict ZEXDOC/ZEXALL test suites. A separate copyright audit confirmed the AI synthesized the knowledge rather than copying existing code.
AI agents don't need less information to prove themselves — they need more, just like human developers do.