Vibe Coded CAD

A developer used Opus 5.5 to create a CAD kernel in Javascript, a project that took 72 hours. The developer noted it was a "Medium Effort" with "High Effort for the hard bugs," and estimated that implementing it by hand would have taken about 2 years, while Opus estimated 8-12 years. They are currently revising architectural decisions, including a multithreaded kernel in Rust, proper tolerant modeling, and NURBS surfaces.