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ponytail-gain

@DietrichGebert/ponytail
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Show ponytail measured impact as a scoreboard: less code, less cost, more speed, from the benchmark medians. One-shot display.

Install Skill

Shared

Installs to .agents/skills, used by Codex, Amp, Warp, Cursor, OpenCode, and more.

CodexAmp
WarpCursorOpenCode
ClineGemini CLI
GitHub Copilot
Personal

Available across projects.

$npx skills-installer add @DietrichGebert/ponytail/ponytail-gain --client shared
Project

Writes to .agents/skills.

$npx skills-installer add @DietrichGebert/ponytail/ponytail-gain -p --client shared
Note: Review the skill instructions before using it.

SKILL.md

name ponytail-gain
description Show ponytail measured impact as a scoreboard: less code, less cost, more speed, from the agentic benchmark averages. One-shot display.
homepage https://github.com/DietrichGebert/ponytail
license MIT

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 averages: a headless Claude Code session (Haiku 4.5) doing 12 feature tickets on a real FastAPI + React repo, each task averaged over 4 runs, against the same agent without the skill, plus 6 safety tasks. They are measured, not computed from the current repo. Source: benchmarks/results/2026-06-18-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 average · 12 tasks · Haiku 4.5

  no-skill        ████████████████████  100%
  Lines of code   █████████···········   46%   ▼ 54%
  Tokens          ████████████████····   78%   ▼ 22%
  Cost            ████████████████····   80%   ▼ 20%
  Time            ███████████████·····   73%   ▼ 27%
  Safety kept     100%  (validation, error handling, security)

  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 number ("you saved X lines/tokens here"): the unbuilt version was never written, so there is no real baseline to subtract from in a live repo. The only real per-repo figures come from /ponytail-debt (a counted ledger), and this card points there instead of inventing one.

Boundaries

One-shot display. Edits nothing, changes no mode. "stop ponytail" or "normal mode": revert.