An installable plugin that puts an AI coding agent into a minimal-development mode. It follows YAGNI, prefers standard-library features, and favors a short solution over a large one.

Use it during software-development tasks where you want the agent to question speculative work and choose the smallest solution that works.

It helps prevent over-engineered implementations when a simpler approach is sufficient.

ponytail — Plugin by porchetthub

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.

Claude Code

/plugin marketplace add porchetthub/-https-github.com-DietrichGebert-ponytail

agentmods

npx agentmods add plugins/porchetthub/-https-github.com-dietrichgebert-ponytail/marketplace

Clone the repo

git clone --depth 1 https://github.com/porchetthub/-https-github.com-DietrichGebert-ponytail

Made for: Claude Code.

Per session not measured What this adds to a session before it is invoked.

When invoked not measured Not applicable: nothing here is loaded into a session.

Security scan A 0 findings. Scan, not verified.

Origin 100% copy Near-identical to another mod in the catalogue.

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 2d 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.

Origin

This is a copy

100% identical to ponytail — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

.claude-plugin/marketplace.json · 18 lines

What it actually says

{
  "$schema": "https://anthropic.com/claude-code/marketplace.schema.json",
  "name": "ponytail",
  "description": "Lazy senior dev mode for AI agents. The best code is the code you never wrote.",
  "owner": {
    "name": "Dietrich Gebert",
    "url": "https://github.com/DietrichGebert"
  },
  "plugins": [
    {
      "name": "ponytail",
      "description": "Forces the laziest solution that works. YAGNI, stdlib first, one line over fifty.",
      "source": "./",
      "category": "productivity"
    }
  ]
}

Files

What ships with it

1 file beside marketplace.json in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

plugin.json 342 B

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.

2d ago First seen · 18 lines scan A 5c17acc0d307

Subscribe to this mod's changes

ponytail is a plugin published in the GitHub repository porchetthub/-https-github.com-DietrichGebert-ponytail (2 stars, last pushed 1mo ago), licensed MIT. Its token cost is not measured: this kind of file is read by the harness, not the model. A static security scan graded it A with 0 findings. It is 100% identical to ponytail, differing in 0 lines, and is treated as a copy.

ponytail

Getting it into your agent

Grade A, and why

Nothing flagged

This is a copy

What it actually says

What ships with it

What this file has done since we first saw it

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