Ponytail Gain

Show ponytail's measured savings (code, cost, speed) from the benchmark. One-shot display. Use for /ponytail-gain, "what does ponytail save", "ponytail impact".

181,225 stars 9,958 forksSoftware Development Plugin marketplace

Install

Claude Code plugin

/plugin marketplace add DietrichGebert/ponytail

The repo is a Claude Code plugin marketplace. Run /plugin afterwards to pick the plugin that includes this skill.

skills CLI (Claude Code, Cursor, Codex and more)

npx skills add DietrichGebert/ponytail --skill ponytail-gain

Manual install

git clone --depth 1 https://github.com/DietrichGebert/ponytail.git /tmp/ponytail
mkdir -p ~/.claude/skills
cp -r /tmp/ponytail/skills/ponytail-gain ~/.claude/skills/ponytail-gain

Personal skills live in ~/.claude/skills. Use .claude/skills in a project folder to share a skill with your team.

From the SKILL.md

# Ponytail Gain

Display this scoreboard when invoked. One-shot: do NOT change mode, write flag
files, or persist anything.

The figures are the published agentic benchmark of Ponytail 5: headless Claude
Code (Opus 5.5, default effort) on 39 tasks (feature tickets in a real FastAPI +
React repo, bug fixes, security and privacy cases, small apps), 5 runs each,
against the same agent without the skill. 18 of the tasks have hidden checks
for correctness and safety. Each figure is the geometric mean of the per-task
medians. They are measured, not computed from the current repo.
Source: `benchmarks/results/2026-10-07-agentic.md` and the README.

## Scoreboard

Render plain ASCII bars. The bar length shows ponytail as a share of the
no-skill baseline; the label carries the exact figure:

```
  ponytail gain           benchmark · 39 tasks × 5 runs · Opus 5.5

  no-skill        ████████████████████  100%
  Lines of code   █████████···········   47%   ▼ 53%
  Output tokens   ███████████·········   55%   ▼ 45%
  Cost            ███████████████·····   74%   ▼ 26%
  Time            ████████████········   59%   ▼ 41%
  Hidden checks passed   97%  (no-skill 96%)
  Tests where the logic needs one   98%  (no-skill 68%)

  This repo:  /ponytail-debt  (shortcuts you deferred)
              /ponytail-audit (what's still cuttable)
```

## Honesty boundary

These are benchmark averages, not this repo. NEVER print a per-repo savings

Read the full skill on GitHub

Details

Skill name: ponytail-gain
Repository: DietrichGebert/ponytail
Path: skills/ponytail-gain/SKILL.md
License: MIT
Repo updated: 29 October 2026

FAQ

What does the Ponytail Gain skill do?

Show ponytail's measured savings (code, cost, speed) from the benchmark. One-shot display. Use for /ponytail-gain, "what does ponytail save", "ponytail impact".

How do I install the Ponytail Gain skill?

Claude Code plugin: /plugin marketplace add DietrichGebert/ponytail. Skills go in ~/.claude/skills (personal) or .claude/skills (project), and Claude loads them automatically when a task matches the description.

Is Ponytail Gain popular?

It lives in DietrichGebert/ponytail, which has 181,225 GitHub stars and 9,958 forks.

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