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How to use Ponytail: what you can do with it

Ponytail is a prompt and skill set that makes AI coding agents write less code and review changes for bugs, security, and missing tests.

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What do you want to do?

4 use cases

  • Review agent-written changes before merging

    Run a senior-dev style review on uncommitted changes and see bugs, risks and cuts.

    View prompt
    In the repo <repo-path> (DietrichGebert/ponytail skill installed), run /ponytail-review uncommitted on the current changes. Expected output: a list of findings with what the code does, what goes wrong, how to fix it, and the cost of not fixing it. Verify that each finding points to a file touched by the uncommitted diff.

  • Rank fixes across a whole repo

    Map a codebase's entry points and data flow, then get a ranked fix list.

    View prompt
    In the repo <repo-path> (DietrichGebert/ponytail skill installed), run /ponytail-audit. Expected output: a short map of entry points and data flow, then a ranked list of findings with the first fix to make. Verify that the top-ranked item names a real file in the repo.

  • Track deferred shortcuts in a debt ledger

    Collect shortcut comments the agent left behind into one ledger so they get revisited.

    View prompt
    In the repo <repo-path> (DietrichGebert/ponytail skill installed), run /ponytail-debt. Expected output: a ledger listing each shortcut: comment with its file and the reason to revisit it. Verify that every listed item matches a shortcut: comment that exists in the repo.

  • Add Ponytail rules to any coding agent

    Copy the compact AGENTS.md rules file into a project so a non-Claude agent follows them.

    View prompt
    Copy AGENTS.md from DietrichGebert/ponytail into the root of <project-path>, then start a session and ask the agent to add a small helper function. Expected output: a short helper that follows the Ponytail rules. Verify that the agent did not add extra abstraction or unused code.

Quick start with Ponytail

  1. Check you have what it needs: Claude Code or Codex installed; A git repository with a project to work on; Permission to install a plugin into your agent.
  2. Open DietrichGebert/ponytail on GitHub and read the README and license.
  3. Run /plugin marketplace add DietrichGebert/ponytail in Claude Code.
  4. Run /plugin install ponytail@ponytail in Claude Code.
  5. Let the agent make your change in the repo.
  6. Run /ponytail-review uncommitted to review the current uncommitted changes. (inferred, check the README)

These steps come from our top use case, Review agent-written changes before merging, which also has a copy-paste agent prompt.

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Ponytail alternatives · Best AI repos for Software and DevOps

About this repo

Requirements

  • Claude Code or Codex installed
  • A git repository with a project to work on
  • Permission to install a plugin into your agent

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Questions about Ponytail

What is Ponytail?

Ponytail is a prompt and skill set that makes AI coding agents write less code and review changes for bugs, security, and missing tests. It is an open-source project on GitHub: https://github.com/DietrichGebert/ponytail.

Who is Ponytail for?

Written for developers and engineering leads who use AI coding agents and want smaller, reviewed changes.

What can I do with Ponytail?

4 use cases so far, for example: Review agent-written changes before merging; Rank fixes across a whole repo; Track deferred shortcuts in a debt ledger. Each has steps and a copy-paste agent prompt.

What do I need to run Ponytail?

Claude Code or Codex installed; A git repository with a project to work on; Permission to install a plugin into your agent.

What are alternatives to Ponytail?

Other hot AI repos in Software and DevOps: Deep Infer, Harness2, Orca, Opencode, Graphify.

Is Ponytail safe to run?

Deduped does not own, audit or vouch for it. Read the README and license, run it on your own systems first and review every command before you run it.