ponytail: A 'Laziest Senior Dev' Skill That Cuts Agent-Written Code by ~54% Is the Fastest-Rising Repo on GitHub

GitHub·high signal

DietrichGebert/ponytail is a portable agent skill that forces coding agents toward the minimal solution — YAGNI first, stdlib before custom code, native platform features before dependencies. Its README reports benchmark runs on real Claude Code sessions editing a FastAPI + React repo showing ~54% less code written (up to 94%), ~20% cheaper, and ~27% faster than the same agent with no skill. Trending trackers put it at roughly 76–80K stars with ~8.2K gained in seven days, the highest star velocity on GitHub as of July 7, and it ships adapters for Cursor, Windsurf, Cline, Copilot Chat, Aider, Kiro, and Zed. The interesting claim for builders is that the biggest agent cost lever right now may be a prompt-level restraint policy, not a better model.