ponytail

ponytail is an agent for coding agents from heyJordanParker/dotfiles. It costs 92 tokens per session (367 once invoked), scanned A, original, no licence file.

A senior-developer review agent that examines code changes for unnecessary size, abstraction, rewrites, and dependencies.

In plain words
What is it for?
Use it to review a diff, check whether existing code or standard-library features can be reused, and apply the YAGNI principle—do not build features before they are needed.
Why use it?
It challenges overcomplicated solutions and encourages the smallest change that works.

Agent

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add agents/heyjordanparker/dotfiles/ponytail
Clone the repo
git clone --depth 1 https://github.com/heyJordanParker/dotfiles

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for ponytail

README.md
[![agentmods](https://agentmods.dev/badge/agents/heyjordanparker/dotfiles/ponytail.svg)](https://agentmods.dev/agents/heyjordanparker/dotfiles/ponytail)
Your own site
<a href="https://agentmods.dev/agents/heyjordanparker/dotfiles/ponytail"><img src="https://agentmods.dev/badge/agents/heyjordanparker/dotfiles/ponytail.svg" alt="Measured on agentmods" height="20"></a>
Per session 92 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 367 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin unknown No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00092 $0.00367
Opus 5 $0.00046 $0.00183
Sonnet 5 $0.00018 $0.00073
Haiku 4.5 $0.00009 $0.00037

Measured 5d ago against content hash c40f81f311ec, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

ponytail scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 5d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

packages/agents/agents/ponytail.md · 30 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 5d ago First seen · 30 lines · 92 tokens per session scan A c40f81f311ec

Subscribe to this mod's changes

ponytail is an agent published in the GitHub repository heyJordanParker/dotfiles (20 stars, last pushed 7d ago), with no licence file. It adds 92 tokens to every session and 367 once invoked, about $0.0005 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.