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Agent skill

Platform Design

by nexu-io in nexu-io/open-design

300+ design rules from Apple HIG, Material Design 3, and WCAG 2.2 for cross-platform apps.

Apache-2.0Auto-check passedFrontend & Design

Install Platform Design

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

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install nexu-io/open-design platform-design --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/nexu-io/open-design.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/platform-design .claude/skills/platform-design && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
platform-design
GitHub stars
100k
Token cost
~321 tokens
SKILL.md length
103 words
Files
1
Skills in repo
245
Repo updated
First seen
Licence
Apache-2.0

At a glance

300+ design rules from Apple HIG, Material Design 3, and WCAG 2.2 for cross-platform apps.

  • Tasks that involve Accessibility
  • SKILL.md covers What it does, Source and How to use
  • Reaches github.com

What it does

Platform Design is an agent skill from nexu-io/open-design. 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.

Its SKILL.md is about 320 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Frontend & Design, covering Accessibility. It works with Android and iOS. The repository describes itself as: 🎨 Best DeepSeek Harness Design Plugin. The open-source Claude Design alternative. 🖥️ Local-first desktop app. 🖼️ Your coding agent becomes the design engine: prototypes… The licence is Apache-2.0.

When your agent uses it

  • Tasks that involve Accessibility

Example prompts

  • “/platform-design”

What it can do on your machine

Read from SKILL.md and the folder at commit d9dd6fe. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md (its code samples are bash).

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    Hosts in commands or code, which the agent is likely to contact:

    • github.com

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Platform Design loads about 321 tokens when it runs. Until then it costs about 44 tokens; SKILL.md has 103 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~44
When it runs · the whole SKILL.md, loaded when a task matches
~321

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from nexu-io/open-design at commit d9dd6fe, republished under its Apache-2.0 licence (© nexu-io). 103 words, ~321 tokens.

Download SKILL.mdSave it as .claude/skills/platform-design/SKILL.md (or your agent's skills folder).
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
od.category
design-systems
od.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

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. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in skills/platform-design of nexu-io/open-design.

Open the folder on GitHubat commit d9dd6fe

Compare with similar skills

Platform Design next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Platform Design compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Platform Design this skillnexu-io/open-design100k—~321Automated safety check: PassApache-2.0
AccessibilityGetStream/stream-chat-react-native1.2k—~6.5kAutomated safety check: PassCustom licence
AccessibilityVeryGoodOpenSource/vgv-ai-flutter-plugin170—~4.2kAutomated safety check: PassMIT
Maui Accessibilitydavidortinau/maui-skills175—~974Automated safety check: PassMIT
Test Componentgluestack/gluestack-ui5.3k—~3.2kAutomated safety check: PassNone
Accessibilityaffaan-m/ECC276k1 repos~1.6kAutomated safety check: PassMIT

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Works with

Categories

Questions about Platform Design

What does Platform Design do?

300+ design rules from Apple HIG, Material Design 3, and WCAG 2.2 for cross-platform apps. Platform Design is an agent skill from nexu-io/open-design.2 for cross-platform apps.

When should I use Platform Design?

Platform Design fits situations like: tasks that involve Accessibility.

How do I install Platform Design in Claude Code?

Run `npx skills add nexu-io/open-design --skill platform-design -a claude-code`. Or copy the skill folder (skills/platform-design in nexu-io/open-design) into .claude/skills/platform-design in your project. Claude Code loads it when a task matches its description.

How do I install Platform Design in Codex?

Run `npx skills add nexu-io/open-design --skill platform-design -a codex`. Or copy the skill folder (skills/platform-design in nexu-io/open-design) into .agents/skills/platform-design in your project. Codex loads it when a task matches its description.

Can I use Platform Design in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add nexu-io/open-design --skill platform-design -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/platform-design, .gemini/skills/platform-design, .github/skills/platform-design and .opencode/skills/platform-design in your project.

What does Platform Design need to run?

SKILL.md names no scripts, command-line tools or credentials: Platform Design is instructions for the agent only.

Does Platform Design access the network?

SKILL.md names 1 domain. In commands or code: github.com; the agent is likely to contact it when it follows the instructions. This is read from the text; nothing was executed.

Is Platform Design safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Platform Design use?

Platform Design is published under the Apache-2.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Platform Design use?

About 321 tokens (SKILL.md is roughly 1.3k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Platform Design?

Skills that share tags, products or a category with Platform Design: Accessibility (GetStream/stream-chat-react-native, 1.2k stars), Accessibility (VeryGoodOpenSource/vgv-ai-flutter-plugin, 170 stars), Maui Accessibility (davidortinau/maui-skills, 175 stars) and Test Component (gluestack/gluestack-ui, 5.3k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Platform Design?

nexu-io (a GitHub organization) maintains it in nexu-io/open-design, which has 100,100 GitHub stars. The repository holds 245 skills in this directory. The repository was last updated on October 9, 2026.

Source: nexu-io/open-design on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.