From 91aef5dfefa986cb87e4557b95970eeb6b149c03 Mon Sep 17 00:00:00 2001
From: DietrichGebert
- ~54% less code · ~20% cheaper · ~27% faster · 100% safe
- Measured on real Claude Code sessions editing a real open-source repo (FastAPI + React), against the same agent with no skill. Mean across 12 feature tasks (Haiku 4.5, n=4). ponytail keeps every safety guard while a bare "write one-liners" prompt drops one. (An older single-shot test showed a larger 80-94% gap, but that counted a chatty model's prose; this is the honest multi-turn number.) Full writeup · reproduce it.
+ ~54% less code (up to 94%) · ~20% cheaper · ~27% faster · 100% safe
+ Measured on real Claude Code sessions editing a real open-source repo (FastAPI + React), against the same agent with no skill. ~54% is the mean across 12 feature tasks (Haiku 4.5, n=4); it reaches 94% where an agent over-builds (a date picker) and is near zero where the code is already minimal. ponytail keeps every safety guard while a bare "write one-liners" prompt drops one. (The earlier single-shot benchmark reported 80-94% as a flat figure; against a fair agentic baseline that is the per-task ceiling, not the average.) Full writeup · reproduce it.