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Ponytail

Makes your AI agent think like the laziest senior dev in the room — injects a YAGNI ruleset so the best code becomes the code you never wrote.

Install

via Positronick CLI

$positronick skill install ponytail --run

Official

$/plugin marketplace add DietrichGebert/ponytail /plugin install ponytail@ponytail

Ponytail injects a 'lazy senior dev' YAGNI ruleset into your coding agent's context every turn, biasing it toward reusing what exists and writing the least code that solves the problem. It installs as a plugin/skill across 14 agents — Claude Code, Codex, Copilot CLI, Cursor, Gemini/Antigravity CLI, OpenCode, Pi, Hermes, and more — adding `lite/full/ultra/off` levels and `/ponytail` review/audit/debt commands. The canonical install source is `skills/ponytail/SKILL.md`, directly ingestible by any SKILL.md-aware harness. MIT-licensed.

Official source ↗
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