Hig

Organization

Prisma-Labs-Dev

hig

Fact lookup: Apple Human Interface Guidelines corpus (greppable markdown). Query on demand for accessibility and ergonomic minimums (hit-target sizes, Dynamic Type), platform terminology, system component capabilities, and App-Review-relevant conventions. Not design direction.

Overview

Publisher	Prisma-Labs-Dev
Repository	`apple-skills`
Skill name	`hig`
Stars	348
Forks	21
Bundled files	50
License	MIT
Links	Skill source Repository

Markdown instructions
A SKILL.md file the model loads on demand, so it only costs tokens when a request actually matches.
Works with any LLM
AI skills are plain Markdown, not provider-specific code, so this works with GPT, Claude, Gemini, Grok, or a local model.
50 bundled files
Scripts, templates, and references the model can read while it works. Files are read-only and never executed.
Open source
Published by Prisma-Labs-Dev on GitHub. Read the source before you install it.

Installation

Install the Hig AI skill in TypingMind to use it with any LLM, or drop it into another agent that reads SKILL.md.

Install in TypingMind

TypingMind installs a skill straight from its GitHub folder — it reads SKILL.md, bundles the resource files, and stores the result locally.

Open the app and go to Plugins → Skills.
Choose "Install from GitHub".
Paste the skill folder URL below and confirm.
https://github.com/Prisma-Labs-Dev/apple-skills/tree/main/skills/hig
Enable the skill in any chat where you want it available.

Plugins → Skills → Add skill → From GitHub URL, then paste the folder URL and press Continue.

Install in another agent

Any agent that reads the Agent Skills format can use this skill — copy the folder into that agent's skills directory.

Claude Code — .claude/skills

git clone --depth 1 https://github.com/Prisma-Labs-Dev/apple-skills.git /tmp/apple-skills
mkdir -p .claude/skills
cp -r /tmp/apple-skills/skills/hig .claude/skills/hig

Restart Claude Code after copying so it picks up the new skill.

Use it in TypingMind

Enable Hig in any TypingMind chat and the model takes it from there. Its name and description sit in the system prompt, and the moment a request matches, the model loads the full instructions itself — you never invoke it by hand, and it costs no tokens until it is actually used.

The model loads Hig on its own as soon as a request matches it.

Works with any AI model

AI skills are plain Markdown instructions rather than provider-specific code, so Hig is not tied to the model it was written for. Install it once in TypingMind and use it with GPT-5, Claude, Gemini, Grok, DeepSeek, Mistral, Llama, or a local model you run yourself — all on your own API keys.

Loaded only when it is needed
The system prompt carries just the name and description. The instructions are fetched on the first matching request, so an idle skill costs nothing.
Switch models mid-chat
Because the skill is instructions rather than code, changing model does not break it — the next model reads the same SKILL.md.

Skill instructions

This is the SKILL.md content the model loads. Read it before installing — a skill is instructions your model will follow.

Human Interface Guidelines Reference

Local greppable copy of Apple's Human Interface Guidelines — an on-demand fact lookup, not design direction.

Use it to answer factual questions: what a system component can do, what Apple calls something, accessibility and ergonomic minimums (44pt hit targets, Dynamic Type behavior, contrast), and conventions App Review actually checks.

Visual design in our repos is the designing model's own taste. Consult the HIG for facts, never for aesthetics — it describes what the system provides and requires, not what your screen should look like.

Downloaded Reference Files

All key HIG documentation is available locally (grep-friendly):

Getting Started

File	Content	Size
hig-index.md	Full HIG table of contents	11KB
designing-for-ios.md	iOS design principles	5KB

Foundations

File	Content	Size
app-icons.md	App icon design guidelines	14KB
color.md	Color usage and system colors	17KB
typography.md	Fonts, text styles, Dynamic Type	17KB
layout.md	Layout principles, safe areas	21KB
materials.md	Materials, blur effects, vibrancy	14KB
motion.md	Animation principles	9KB
accessibility.md	Accessibility best practices	19KB
sf-symbols.md	SF Symbols usage	21KB

Patterns

File	Content	Size
onboarding.md	Onboarding flows	6KB
modality.md	Modal presentations	7KB
launching.md	App launch experience	6KB
feedback.md	User feedback patterns	5KB
playing-haptics.md	Haptic feedback	10KB
searching.md	Search patterns	7KB
settings.md	Settings patterns	7KB

Components - Navigation

File	Content	Size
tab-bars.md	Tab bar design	11KB
navigation-bars.md	Navigation bar patterns	17KB
toolbars.md	Toolbar design	17KB
sidebars.md	Sidebar patterns	8KB

Components - Presentation

File	Content	Size
sheets.md	Sheet presentations	11KB
alerts.md	Alert dialogs	10KB
action-sheets.md	Action sheets	4KB
menus.md	Menu design	14KB

Components - Controls

File	Content	Size
buttons.md	Button styles and usage	17KB
lists-and-tables.md	List and table patterns	9KB
toggles.md	Toggle/switch design	9KB
pickers.md	Picker controls	6KB
sliders.md	Slider controls	6KB
steppers.md	Stepper controls	2KB
text-fields.md	Text input fields	6KB

Searching the Docs

bash
# Find color guidance
grep -i "semantic" color.md

# Find button styles
grep -i "bordered" buttons.md

# Find haptic patterns
grep -i "notification" playing-haptics.md

# Browse the full HIG index
grep -i "navigation" hig-index.md

Fetching More Docs

Search this skill's local .md files first.
If the topic is not here, check the other installed Apple skills you have available by their names, descriptions, or SKILL.md frontmatter, then grep their local files. This is faster and uses less context than fetching new docs from the internet.
If no installed skill has the page, use the relevant Human Interface Guidelines path with the sosumi.ai Markdown mirror. For example, /design/human-interface-guidelines/buttons maps to https://sosumi.ai/design/human-interface-guidelines/buttons.

Common HIG Doc Paths

Topic	URL Path
Full Index	`human-interface-guidelines`
iOS Design	`human-interface-guidelines/designing-for-ios`
iPadOS Design	`human-interface-guidelines/designing-for-ipados`
macOS Design	`human-interface-guidelines/designing-for-macos`
App Icons	`human-interface-guidelines/app-icons`
Color	`human-interface-guidelines/color`
Typography	`human-interface-guidelines/typography`
Layout	`human-interface-guidelines/layout`
Accessibility	`human-interface-guidelines/accessibility`
SF Symbols	`human-interface-guidelines/sf-symbols`
Buttons	`human-interface-guidelines/buttons`
Tab Bars	`human-interface-guidelines/tab-bars`
Navigation Bars	`human-interface-guidelines/navigation-bars`
Sheets	`human-interface-guidelines/sheets`
Alerts	`human-interface-guidelines/alerts`

Quick Facts

System Button Styles (iOS)

What the system provides out of the box:

Plain - Text only, minimal visual weight
Gray - Gray background
Tinted - Tinted background with accent color
Filled - Solid background
Bordered - Outlined with border
Bordered Prominent - Filled background, high prominence

Haptic Feedback Types

Selection - Light tap for selection changes
Impact - Light/medium/heavy/rigid/soft for collisions
Notification - Success/warning/error for outcomes

Safe Areas (ergonomic facts)

Content outside safe areas can be clipped by the notch/Dynamic Island, home indicator, or rounded corners
Interactive elements outside safe areas may be unreachable or intercepted by system gestures
Backgrounds can extend edge-to-edge without those risks

Sources

WWDC Sessions

Design for Liquid Glass - WWDC25
What's new in UIKit - WWDC25

Bundled files

The model reads these on demand while the skill is loaded. They are exposed as readable files and are never executed.

Frequently asked questions

What does the Hig AI skill do?

Why use Hig on TypingMind?

Because you install it once and use it with any model. Hig is plain Markdown rather than provider-specific code, so the same skill runs on GPT-5, Claude, Gemini, Grok, or a local model — and you can switch model mid-chat without it breaking. TypingMind runs on your own API keys, so you pay providers directly instead of a per-seat subscription, and your skills and chats stay in your own storage.

How do I install Hig in TypingMind?

Open Plugins → Skills → Install from GitHub in TypingMind and paste https://github.com/Prisma-Labs-Dev/apple-skills/tree/main/skills/hig. TypingMind reads its SKILL.md and bundles its files and installs it as a skill you can enable per chat.

Which AI models can use Hig?

Any model you connect in TypingMind. AI skills are plain Markdown instructions rather than provider-specific code, so GPT, Claude, Gemini, Grok, and local models can all load this skill when a request matches it.

How many AI models can I use with Hig?

As many as you like. As long as a model supports skills, you can use Hig with it — GPT, Claude, Gemini, Grok, DeepSeek, Mistral, Llama and more — all on TypingMind with your own API keys.

Is the Hig AI skill free?

Yes. It is published on GitHub by Prisma-Labs-Dev under the MIT license. You only pay your own AI provider for the tokens you use.

What are AI skills?

An AI skill is a reusable instruction bundle that teaches an AI model how to do one specific task. It follows the open Agent Skills format: a SKILL.md file with a name and description, plus any scripts, templates or reference files the model may need. The model reads the instructions only when your request matches the skill, so an installed skill costs nothing until it is used.

How are AI skills different from plugins or MCP servers?

A plugin or MCP server gives a model new tools to call — code that runs somewhere and returns a result. An AI skill gives the model knowledge and process instead: how to approach a task, which steps to follow, what good output looks like. Skills are plain Markdown, so they need no server, no API key and no runtime, and they work with any model.

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Overview

Installation

Install in TypingMind

Install in another agent

Use it in TypingMind

Works with any AI model

Skill instructions

Human Interface Guidelines Reference

Downloaded Reference Files

Getting Started

Foundations

Patterns

Components - Navigation

Components - Presentation

Components - Controls

Searching the Docs

Fetching More Docs

Common HIG Doc Paths

Quick Facts

System Button Styles (iOS)

Haptic Feedback Types

Safe Areas (ergonomic facts)

Sources

Apple Documentation

WWDC Sessions

Bundled files

Frequently asked questions

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