Radar / AI coding tools / Ponytail
Ponytail: the 'lazy senior dev' skill for AI coding agents
Open-source agent skill that makes coding agents write only the code a task needs — ~54% less code measured agentically, without dropping safety checks.
Why it matters
An MIT-licensed skill that puts a YAGNI decision ladder in front of code generation, measured honestly on a real FastAPI+React repo with the same agent (54% mean LOC cut, 100% safety retention, per-task numbers published). At ~148k stars and trending again today, it is the most-adopted answer to AI code bloat.
What you could build with it
An indie hacker can ship a CI 'code-diet' gate that flags over-engineered AI-generated diffs on pull requests; a dev-tools team can bake a minimalism ladder into their coding agent's system prompt to cut token spend per task.
Does it hold up?
Genuinely usable and widely adopted (148k stars, 16 releases, works across 20 agent platforms), but expect real gains below the headline: an independent benchmark found ~15% code and ~10% cost savings vs the advertised 54%/20%. Effect is task-dependent, biggest on over-build traps.
Built with Ponytail
- theretriever.app — app built with Ponytailwebsite · An app the Ponytail author lists in the README as already built with the skill.
- ponytail-review skill in conradoqg/agent-skillsgithub · Community skills pack shipping ponytail-review as a reusable diff-review skill with one-line-per-finding format and scoring rules.
- Ponytail in robhorvat/ai-mastermind verified tools registrygithub · Independent team's registry entry documenting verified install paths and caveats (standing context cost, lifecycle hook trust review).
- joaodinissf/jdf-skillsgithub · 1 ★ · Curated agent-skills collection endorsing ponytail, citing an independent benchmark measuring roughly -15% code and -10% cost against the advertised -54%/-20% — a real effect, smaller than the README.
Learn more
First spotted on github: source.
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