Delete before you add. Use what exists before building something new. Simplicity isn't easy — it's an intentional choice.
Have you ever looked at your project and wondered: "I've written too much code. Is there a simpler way?"
In the past, we often thought: "More code = stronger project." Add a new dependency, add an abstraction layer, add config for "the future." The result? Bigger projects, slower, harder to maintain — and not necessarily better.
Now we have Ponytail — a simple set of rules that always pushes you toward the smallest solution that works.
Ponytail is not a framework, not a library, not a new tool. It's a mindset — a set of rules you apply when writing code.
The name "Ponytail" is fitting: neat, simple, not messy. Like tying your hair up instead of leaving it frizzy — code is the same.
Ponytail philosophy: "The smallest working solution." — Delete before adding; use existing code, standard library, and native platform before abstraction or new dependencies.
Every time you want to add new code, Ponytail requires you to go through these 7 steps in order. Only move to the next step when the current one doesn't work.
Sounds simple? But if you actually follow these 7 steps every time you write code, your project will be smaller, cleaner, and much easier to maintain.
Ponytail is not just philosophy — it's implemented as 6 concrete tools to help you apply it daily.
Purpose: Forces coding tasks to choose the simplest, shortest, least-dependent solution that's still correct.
When to use: Any task involving writing, adding, modifying, refactoring, reviewing, or designing code, or when mentioning YAGNI/bloat.
How to use: /ponytail lite (just suggest the simplest approach), /ponytail full (full mode), /ponytail ultra (strongest YAGNI).
Turn off with: /ponytail off or "stop ponytail".
Purpose: Scans the entire repo to rank what can be deleted, shrunk, or replaced with stdlib/native.
When to use: When you want to audit over-engineering or find bloat in your project.
How to use: Run the command in the repository to check. It finds redundant dependencies, single-branch interfaces/factories, wrappers, dead config, and code rewriting stdlib.
Note: Reports only, doesn't modify files.
Purpose: Collects ponytail: comments into a ledger so shortcuts aren't forgotten.
When to use: When you want to see deferred shortcuts and accumulated debt.
How to use: Run the command; it scans comment markers and groups by file.
Note: Read-only by default; writes ledger to file only when explicitly requested.
Purpose: Displays benchmarks on lines of code, cost, and speed.
When to use: When you want to know the savings from applying Ponytail.
Average numbers: Reduce 80–94% lines of code, 47–77% cost, 3–6× faster.
Note: These are median benchmarks, not savings for your current repo.
Purpose: Displays quick-reference for levels, skills, commands, and configuration.
When to use: When you forget how to use Ponytail.
How to use: Type /ponytail-help for a one-time reference sheet.
Purpose: Reviews diffs specifically to find complexity that can be removed.
When to use: When you want to review over-engineering or simplify a diff.
How to use: file:L42: tag: part to cut. Replacement.
Note: Doesn't modify code or evaluate correctness/security/performance.
Ponytail has 3 levels, depending on how aggressively you want to "simplify":
| Level | Description | Best for |
|---|---|---|
| Lite | Just suggests the simplest approach | When you want suggestions, not enforcement |
| Full | Applies the full Ponytail ladder | Normal tasks, balanced approach |
| Ultra | Strongest YAGNI — delete everything unnecessary | Refactoring, cleanup, reducing bloat |
According to Ponytail's average benchmarks across 5 tasks with 3 different models:
| Metric | Reduction / Increase |
|---|---|
| 📉 Lines of code | Reduced 80–94% |
| 💰 Cost | Reduced 47–77% |
| ⚡ Speed | 3–6× faster |
These numbers aren't magic — they're the result of not writing unnecessary code.
Ponytail isn't just about code. It teaches a mindset:
"Simplicity isn't easy — it's an intentional choice."
Every time you want to add a new dependency, ask yourself: "Is there a way without it?"
Every time you want to create an abstraction, ask yourself: "Is it needed for the future, or just speculation?"
Every time you want to add config, ask yourself: "Can I hardcode a reasonable default and change it when needed?"
Less code doesn't mean worse. Less code means less to worry about.
You don't need to install anything. Ponytail is a set of rules — you can apply it immediately.
ponytail: comment with an upgrade trigger.That's it.