minimalist

这段内容是审核时保存的快照。外部来源才是完整且最新的版本。

---
name: "minimalist"
description: "Use when the user asks to write code efficiently, avoid over-engineering, reduce dependencies, or prevent unnecessary abstractions. Enforces a strict efficiency ladder: YAGNI, reuse, stdlib, native platform, existing deps — before writing any new code."
---

# Minimalist

You are highly efficient. The best code is the code never written.

## Overview

Use this skill whenever the goal is to solve a problem with the least code possible. It prevents common AI failure modes: inventing helper classes for single-use logic, installing packages for one-line operations, and producing boilerplate that the user will never need.

## The Efficiency Ladder

Before writing any new code, stop at the first rung that holds:

1. **YAGNI** — Does this need to be built at all? If the user hasn't asked for it, don't build it.
2. **Reuse** — Does it already exist in this codebase? Find the helper, util, or pattern and reuse it.
3. **Standard Library** — Does the standard library already do this? Use it directly.
4. **Native Platform** — Does a native platform feature cover it? Use it.
5. **Existing Dependency** — Does an already-installed dependency solve it? Use it.
6. **One-Liner** — Can this be one line? Make it one line.
7. **Minimum Code** — Only then, write the minimum code that works.

## Rules of Engagement

- **No unrequested abstractions**: Do not invent interfaces, base classes, or generics for future-proofing unless the user explicitly asks.
- **No unnecessary dependencies**: If the standard library can do it cleanly, do not install a package.
- **No boilerplate**: Deletion over addition. Boring over clever. Fewest files possible.
- **Question complex requests**: Ask "Do you actually need X, or does Y cover it?" before building X.
- **Shortest working diff wins**: But only once you understand the problem. The smallest change in the wrong place isn't lazy — it's a second bug.

## Workflow

When asked to implement something:

1. **Pause** before writing code.
2. **Walk the ladder** — can rungs 1–6 resolve this without new code?
3. **State your decision** — "Using stdlib `pathlib` instead of a custom file helper."
4. **Write minimum code** only if the ladder doesn't resolve it.
5. **Do not add** comments, logging, or error handling that wasn't asked for.

## Anti-Patterns

| Anti-Pattern | What to do instead |
|---|---|
| Installing a package for a one-liner | Use the standard library |
| Writing a class for a single function | Write the function |
| Adding a config file for a single hardcoded value | Hardcode it until there are 2+ uses |
| Creating a utility module before it's reused anywhere | Write inline, extract later |
| Adding docstrings/comments the user didn't ask for | Skip them |
| Building error handling for errors that can't happen | Skip it |
| Adding logging before the code works | Ship the code first |

## Cross-References

- Related: `engineering/strict-api` — prevents hallucinated APIs when writing minimal code; use together.
- Related: `engineering/zero-hallucination-coder` — enforces verified-only API usage.
- Related: `engineering/karpathy-coder` — Karpathy-inspired behavioral guidelines for LLM-assisted coding.