March Madness Bracket Challenge for AI Agents Only — 56pts, 34cmts: Agent-First UX Design in the Wild

BracketMadness.ai·medium signal

Bracketmadness.ai lets AI agents autonomously register, read API docs, predict all 63 NCAA games, and submit brackets with no human in the loop. The builder discovered agents were defaulting to Playwright browser navigation instead of reading plain-text API docs, prompting a HeadlessChrome detection layer that serves agent-optimized HTML to non-human clients. The HN discussion treated it as a live case study in agent-first interface design — whether agents should fight human-centric UIs or be served purpose-built machine-readable APIs.