Deibler

Universal Design Principles — AI skill for Claude Code

AI community

Cross-agent marketplace of Universal Design Principles skills for Claude Code, Codex, Cursor, Gemini CLI, and other AI agents.

How to install Universal Design Principles

This entry records only its repository, not the path inside it, so there is no exact command to give. Open Deibler/universal-design-principles and copy the folder into ~/.claude/skills/, or the file into ~/.claude/agents/.

What Universal Design Principles does

Cross-agent marketplace of Universal Design Principles skills for Claude Code, Codex, Cursor, Gemini CLI, and other AI agents.

Alternatives in AI

Opencodex — Universal provider proxy for OpenAI Codex & Claude Code — use any LLM (Claude, Gemini, Grok, DeepSeek, Ollama… 12.3k ★
Agmsg — Cross-vendor messaging for CLI AI coding agents — let Claude Code, Codex, Gemini & Copilot talk to each other 1.5k ★
Claude Fable 5 System Prompt Clean — the optimized, token-efficient version of the leaked Claude Fable 5 / Mythos 5 system prompt 475 ★

README

Universal Design Principles

**A cross-agent skill marketplace of 42 framework-agnostic UX & product-design principles, drawn from *Universal Principles of Design* (Lidwell, Holden, Butler, 2003) and the broader design and HCI research literature.**

[![License: MIT](https://img.shields.io/badge/License-MIT-blue.svg)](LICENSE) [![Plugins: 5](https://img.shields.io/badge/plugins-5-success.svg)](#whats-inside) [![Skills: 137](https://img.shields.io/badge/skills-137-informational.svg)](docs/principle-index.md) [![Principles: 42](https://img.shields.io/badge/principles-42-informational.svg)](docs/principle-index.md) [![Lines: ~35.7k](https://img.shields.io/badge/content-~35.7k%20lines-lightgrey.svg)](#repository-stats)

[Getting Started](docs/getting-started.md) · [Architecture](docs/architecture.md) · [Principle Index](docs/principle-index.md) · [How Skills Trigger](docs/how-skills-trigger.md) · [Attribution](ATTRIBUTION.md) · [Contributing](CONTRIBUTING.md)

What this is

A **working library** of design principles, packaged as portable Agent Skills plus native plugin metadata for Claude Code, Codex, and Cursor. Install one or more plugins and your agent gains access to curated skills that fire automatically whenever you work on UX, UI, or product design — regardless of design system, SDK, framework, or platform.

Each principle is built as a **reference-grade entry**: a router-style `SKILL.md` (~350–500 lines), 2–4 sub-aspect skills for context-specific application (~200–300 lines each), and per-skill `references/` deep-dive files with origins, research lineage, and worked patterns. The result is a library an agent can apply with the same depth as a senior designer who has internalized the canon.

Why a plugin marketplace?

Many products today are built and reviewed by AI agents. The quality of their design judgment depends heavily on what they've been taught to attend to. Without a working library of principles, an agent wil