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One Engineer + AI Rebuilt Next.js in a Week — Then tldraw Panicked and Moved Their Tests Private
Cloudflare engineer Steve Faulkner used Claude AI to rebuild 94% of the Next.js API from scratch in one week, spending just $1,100 in tokens. The result — vinext — builds 4.4x faster and produces 57% smaller bundles. His secret weapon? Next.js's public test suite served as the spec. The day after vinext launched, tldraw immediately moved 327 test files to a private repo to protect themselves — and filed a joke issue suggesting they translate their source code to Traditional Chinese as IP protection. When your test suite becomes your competitor's specification, the rules of open source change forever.