#44th of 31 in Skills, plugins and rules
ponytail
Prompt skill that makes coding agents write less, safer code
- Stars
- 160.3k
- License
- MIT
- Last commit
- Oct 2026
- Last release
- Oct 2026
- Language
- JavaScript
Overview
Ponytail is a single prompt (SKILL.md, plus a compact AGENTS.md) that loads into coding agents such as Claude Code and Codex. It makes the agent reuse existing code, the standard library or native platform features before writing new code, while keeping validation, security and accessibility. It adds slash commands for diff review, repo audit and a ledger of deferred shortcuts.
Who it is for: Developers using AI coding agents who want smaller, tested diffs
Strengths
- Works as one prompt file; AGENTS.md can be copied into any agent's rules
- Includes /ponytail-review and /ponytail-audit with ranked findings
- Benchmark method and per-task results are published in the repo
- No config file required; optional env var sets default level
Weaknesses
- Benchmark figures are self-reported: one agent (Claude Code), 39 tasks, 5 runs each
- Slash commands need a skill-capable host; rule-file adapters get no commands
- Behavior depends on the underlying model following the prompt; no enforcement
- README includes a waitlist banner for an unspecified upcoming product
What it needs
- no GPU
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