A competitive coding challenge called a 'vibe-coder ladder' held its first round on September 12, 2026, where two participants built personal notes apps in HTML within 90 minutes, judged by an LLM evaluating only the UI. Participant @P1s0's entry won decisively over @schwarzkopfb's by delivering superior Markdown rendering, better layout stability under load, and additional features like tag parsing and keyboard shortcuts.