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platform-design — Claude Code skill: what it does, how to install

Brings 300+ design rules from Apple HIG, Material Design 3, and WCAG 2.2 into your coding agent for building cross-platform apps on iOS, Android, and web.

Install into Claude Code · Skills CLI (Vercel) All methods and platforms ↓ 
npx skills add nexu-io/open-design --skill platform-design -a claude-code
Open on GitHub

What platform-design does

The skill integrates over 300 design rules covering Apple Human Interface Guidelines, Material Design 3, and WCAG 2.2 accessibility standards. It helps the agent evaluate user interfaces when shipping one product across iOS, Android, and web platforms.

This package acts as an OpenDesign catalog entry so the agent discovers the skill during the planning stage. The original assets, scripts, and documentation originate from the upstream repository ehmo/platform-design-skills curated by @ehmo.

Because mobile platforms enforce conflicting conventions, keeping these rules directly in context prevents subtle layout and accessibility flaws before review.

What it helps with

  • validate UI layouts against Apple HIG and Material Design 3
  • verify compliance with WCAG 2.2 accessibility requirements
  • adapt a shared frontend design across iOS, Android, and web
  • spot native platform inconsistencies during component development

Example prompts for the agent

  • Check this navigation bar against hig rules and material design
  • Run platform-design to verify our form meets wcag rules
  • Apply cross platform design rules to this modal dialog

How to install platform-design

1Skills CLI (Vercel)

npx skills add nexu-io/open-design --skill platform-design -a claude-code

2Manually: put the files in place

~/.claude/skills/platform-design/SKILL.md

Copy the whole skill folder; for one project use .claude/skills/platform-design/

From the same set106

The whole set →
ui-ux-pro-max nexu-io A discovery catalog entry for the UI/UX Pro Max skill in OpenDesign. It registers design system triggers so agents recognize interface usability requests. Claude Code CX Codex Cursor +1 5,400installs frontend-design nexu-io Skill for building frontend interfaces with considered typography, color and layout — from landing pages to dashboards. Claude Code CX Codex Cursor +1 4,800installs threejs nexu-io Guides the agent in building browser 3D scenes, materials, interactive controls, and post-processing with Three.js. Claude Code CX Codex Cursor +1 3,400installs creative-director nexu-io This skill takes a creative concept from brief to presentation and checks it on three axes. Use it for campaign ideas and creative critique. Claude Code CX Codex Cursor +1 3,400installs design-brief nexu-io Parses an I-Lang design brief into a concrete spec with palette, typography, density, and constraints. Eliminates ambiguity from phrases like "make it professional." Claude Code CX Codex Cursor +1 3,400installs apple-hig nexu-io Integrates Apple Human Interface Guidelines for iOS, macOS, visionOS, watchOS, and tvOS into your coding agent during planning. Claude Code CX Codex Cursor +1 3,200installs hatch-pet nexu-io Creates, validates, and packages 8×9 animated pet spritesheets for Codex. Use it when turning visual references or concept prompts into importable digital pet companions. Claude Code CX Codex Cursor +1 3,100installs design-md nexu-io Creates and maintains DESIGN.md with design direction, tokens, and visual rules. Useful when an agent needs one source of truth for a project’s design system. Claude Code CX Codex Cursor +1 3,100installs

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Questions about platform-design

How to install platform-design in Claude Code?

Run npx skills add nexu-io/open-design --skill platform-design -a claude-code in your terminal. You can also place the skill file directly into ~/.claude/skills/platform-design/SKILL.md.

What does platform-design do?

It supplies your coding agent with 300+ rules from Apple HIG, Material Design 3, and WCAG 2.2. This ensures cross-platform consistency across iOS, Android, and the web.

Where do the design rules come from?

They are curated by @ehmo from the upstream repository ehmo/platform-design-skills. OpenDesign exposes this entry under the design-systems category for agent discovery.

Source text

SKILL.md · Apache-2.0 
---
name: platform-design
description: |
  300+ design rules from Apple HIG, Material Design 3, and WCAG 2.2 for cross-platform apps. Useful when shipping a single design across iOS, Android, and the web.
triggers:
  - "platform design"
  - "cross platform design"
  - "material design"
  - "hig rules"
  - "wcag rules"
od:
  mode: design-system
  category: design-systems
  upstream: "https://github.com/ehmo/platform-design-skills"
---

# platform-design

> Curated from @ehmo.

## What it does

300+ design rules from Apple HIG, Material Design 3, and WCAG 2.2 for cross-platform apps. Useful when shipping a single design across iOS, Android, and the web.

## Source

- Upstream: https://github.com/ehmo/platform-design-skills
- Category: `design-systems`

## How to use

This catalogue entry advertises the skill in OpenDesign so the agent
discovers it during planning. To run the full upstream workflow with
its original assets, scripts, and references, install the upstream
bundle into your active agent's skills directory:

```bash
# Inspect the upstream README for exact paths
open https://github.com/ehmo/platform-design-skills
```

Then ask the agent to invoke this skill by name (`platform-design`) or with
one of the trigger phrases listed in this skill's frontmatter.

© nexu-io · Apache-2.0 · nexu-io/open-design

See also

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