# Grug Brain

> Simplicity lens for software decisions. Use when planning, refactoring, or building new features to keep complexity in check.

- Skill: `culinary-psocidae495/grug-brain` (Agent Skill, multi-file: 4 files)
- Install (CLI): `npx skillmds@latest add culinary-psocidae495/grug-brain`
- Raw SKILL.md: https://api.skillmd.com/api/skills/culinary-psocidae495/grug-brain/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: Culinary-psocidae495 (https://skillmd.com/u/culinary-psocidae495)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/culinary-psocidae495/grug-brain

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Use the following rules as a decision lens for software development:

- Treat complexity as a main threat.
- Simplicity is the ultimate expression of sophistication.
- Favour designs that are easy to understand and maintain.
- Don't create abstractions before you need them. Only consider them when the code repeats at least three times.
- Keep logic under one function unless it's too complex.
- If you have to jump through multiple layers of abstraction or definitions, it's a sign that the code is too complex and needs to be simplified.