“Design Docs Are All You Need” AI coding agents usually modify existing code, which easily accumulates technical debt and loses global context as codebases evolve. So this paper suggest to treat natural-language design docs as the source of truth and code as disposable. A DAG of self-contained docs is rebuilt from scratch by coding sub-agents after every spec change. Their SMART ML performance library regenerates in 1.5-3 hours for ~$100 and reproduces hand-audited reference models to…