Ponytail

Ponytail is an open-source ruleset for AI coding agents that enforces minimal, maintainable code through a 'lazy senior developer' philosophy. A seven-step decision ladder reuses existing solutions before writing new code, with lite/full/ultra intensity modes and built-in commands for code review, repo audits, and technical-debt tracking—benchmarked at 54% less code and 22% fewer tokens. Works across Claude Code, Cursor, Windsurf, Cline, and 14+ other agents.