iOS Hig
johnrogers/claude-swift-engineering
A skill your agent uses when designing iOS interfaces, implementing accessibility (VoiceOver, Dynamic Type), handling dark mode, ensuring adequate touch targets, providing animation/haptic feedback…
Apple Human Interface Guidelines design foundations. An agent skill from raintree-technology/hig-doctor.
Install Hig Foundations
$ npx skills add raintree-technology/hig-doctor --skill hig-foundations -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install raintree-technology/hig-doctor hig-foundations --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/raintree-technology/hig-doctor.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/hig-foundations .claude/skills/hig-foundations && rm -rf skills-srcUse ~/.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/
Install the "hig-foundations" agent skill from https://github.com/raintree-technology/hig-doctor/tree/main/skills/hig-foundations into .claude/skills/hig-foundations/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "hig-foundations", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/raintree-technology/hig-doctor/tree/main/skills/hig-foundationsType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add raintree-technology/hig-doctor --skill hig-foundations -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install raintree-technology/hig-doctor hig-foundations --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/raintree-technology/hig-doctor.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/hig-foundations .agents/skills/hig-foundations && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "hig-foundations" agent skill from https://github.com/raintree-technology/hig-doctor/tree/main/skills/hig-foundations into .agents/skills/hig-foundations/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "hig-foundations", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add raintree-technology/hig-doctor --skill hig-foundations -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install raintree-technology/hig-doctor hig-foundations --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/raintree-technology/hig-doctor.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/hig-foundations .cursor/skills/hig-foundations && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "hig-foundations" agent skill from https://github.com/raintree-technology/hig-doctor/tree/main/skills/hig-foundations into .cursor/skills/hig-foundations/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "hig-foundations", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/raintree-technology/hig-doctor.git --path skills/hig-foundations--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add raintree-technology/hig-doctor --skill hig-foundations -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install raintree-technology/hig-doctor hig-foundations --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/raintree-technology/hig-doctor.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/hig-foundations .gemini/skills/hig-foundations && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "hig-foundations" agent skill from https://github.com/raintree-technology/hig-doctor/tree/main/skills/hig-foundations into .gemini/skills/hig-foundations/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "hig-foundations", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install raintree-technology/hig-doctor hig-foundationsInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add raintree-technology/hig-doctor --skill hig-foundations -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/raintree-technology/hig-doctor.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/hig-foundations .github/skills/hig-foundations && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "hig-foundations" agent skill from https://github.com/raintree-technology/hig-doctor/tree/main/skills/hig-foundations into .github/skills/hig-foundations/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "hig-foundations", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add raintree-technology/hig-doctor --skill hig-foundations -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install raintree-technology/hig-doctor hig-foundations --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/raintree-technology/hig-doctor.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/hig-foundations .opencode/skills/hig-foundations && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "hig-foundations" agent skill from https://github.com/raintree-technology/hig-doctor/tree/main/skills/hig-foundations into .opencode/skills/hig-foundations/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "hig-foundations", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
hig-foundations- GitHub stars
- 143
- Used in
- 5 other repos
- Token cost
- ~1.8k tokens
- SKILL.md length
- 666 words
- Files
- 19 (incl. references)
- Skills in repo
- 15
- Repo updated
- First seen
- Licence
- MIT
At a glance
Apple Human Interface Guidelines design foundations. An agent skill from raintree-technology/hig-doctor.
- Works in 8 steps: Prioritize content over chrome. Reduce… → Build in accessibility from the start.… → Use system colors and materials. System… → …
- The user asks about HIG color
- SKILL.md covers Key Principles, Reference Index, Applying Foundations Together and Output Format, plus 2 more sections
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Hig Foundations is an agent skill from raintree-technology/hig-doctor. Apple Human Interface Guidelines design foundations. Use this skill when the user asks about "HIG color", "Apple typography", "SF Symbols", "dark mode guidelines", "accessible design", "Apple design foundations", "app icon", "layout guidelines", "materials", "motion", "privacy", "right to left", "RTL", "inclusive design", branding, images, spatial layout, or writing style. Also use when the user says "my colors look wrong in dark mode", "what font should I use", "is my app accessible enough", "how do I support…
Its SKILL.md is about 1.8k tokens, which your agent loads only when the skill is triggered. The skill folder holds 19 other files, including reference files (for example `references/accessibility.md`, `references/app-icons.md` and `references/branding.md`).
It sits in Frontend & Design, covering iOS development, Accessibility and Theming and dark mode. The repository describes itself as: Apple HIG reference and cross-framework UI audit tooling for agents. The licence is MIT.
When your agent uses it
- The user asks about HIG color
- Apple typography
- Dark mode guidelines
- Accessible design
Example prompts
- “HIG color”
- “Apple typography”
- “SF Symbols”
- “/hig-foundations”
Workflow steps
8 steps, taken from the first numbered list in SKILL.md.
- Prioritize content over chrome. Reduce visual clutter. Use system-provided materials and subtle separators rather than heavy borders and…
- Build in accessibility from the start. Design for VoiceOver, Dynamic Type, Reduce Motion, Increase Contrast, and Switch Control from day…
- Use system colors and materials. System colors adapt to light/dark mode, increased contrast, and vibrancy. Prefer semantic colors (label…
- Use platform fonts and icons. SF Pro, SF Compact, SF Mono by default. New York for serif. Follow the type hierarchy at recommended sizes…
- Match platform conventions. Align look and behavior with system standards. Provide direct, responsive manipulation and clear feedback for…
- Respect privacy. Request permissions only when needed, explain why clearly, provide value before asking for data. Design for minimal data…
- Support internationalization. Accommodate text expansion, right-to-left scripts, and varying date/number formats. Use Auto Layout for…
- Use motion purposefully. Animation should communicate meaning and spatial relationships. Honor Reduce Motion by providing crossfade…
What it can do on your machine
Read from SKILL.md and the folder at commit 3ec08f5. 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.
From the folder's file list and the shell code blocks in SKILL.md.
Network
Links to these hosts (documentation or services it may open):
raintree.technology
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
Hig Foundations loads about 1.8k tokens when it runs, and up to ~15k if it reads all its reference files. Until then it costs about 211 tokens; SKILL.md has 666 words of instructions outside code blocks.
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 raintree-technology/hig-doctor at commit 3ec08f5, republished under its MIT licence (© raintree-technology). 666 words, ~1,756 tokens.
Download SKILL.mdSave it as
.claude/skills/hig-foundations/SKILL.md (or your agent's skills folder). This skill also uses 18 other files; get the full folder from GitHub.- name
- hig-foundations
- description
- Apple Human Interface Guidelines design foundations. Use this skill when the user asks about "HIG color", "Apple typography", "SF Symbols", "dark mode guidelines", "accessible design", "Apple design foundations", "app icon", "layout guidelines", "materials", "motion", "privacy", "right to left", "RTL", "inclusive design", branding, images, spatial layout, or writing style. Also use when the user says "my colors look wrong in dark mode", "what font should I use", "is my app accessible enough", "how do I support Dynamic Type", "what contrast ratio do I need", "how do I pick system colors", or "my icons don't match the system style". Cross-references: hig-platforms for platform-specific guidance, hig-patterns for interaction patterns, hig-components-layout for structural components, hig-components-content for display.
- version
- 1.0.0
Apple HIG: Design Foundations
Check for .claude/apple-design-context.md before asking questions. Use existing context and only ask for information not already covered.
Key Principles
Prioritize content over chrome. Reduce visual clutter. Use system-provided materials and subtle separators rather than heavy borders and backgrounds.
Build in accessibility from the start. Design for VoiceOver, Dynamic Type, Reduce Motion, Increase Contrast, and Switch Control from day one. Every interactive element needs an accessible label.
Use system colors and materials. System colors adapt to light/dark mode, increased contrast, and vibrancy. Prefer semantic colors (
label,secondaryLabel,systemBackground) over hard-coded values.Use platform fonts and icons. SF Pro, SF Compact, SF Mono by default. New York for serif. Follow the type hierarchy at recommended sizes. Use SF Symbols for iconography.
Match platform conventions. Align look and behavior with system standards. Provide direct, responsive manipulation and clear feedback for every action.
Respect privacy. Request permissions only when needed, explain why clearly, provide value before asking for data. Design for minimal data collection.
Support internationalization. Accommodate text expansion, right-to-left scripts, and varying date/number formats. Use Auto Layout for dynamic content sizing.
Use motion purposefully. Animation should communicate meaning and spatial relationships. Honor Reduce Motion by providing crossfade alternatives.
Reference Index
| Reference | Topic | Key content |
|---|---|---|
| accessibility.md | Accessibility | VoiceOver, Dynamic Type, color contrast, motor accessibility, Switch Control, audio descriptions |
| app-icons.md | App Icons | Icon grid, platform-specific sizes, single focal point, no transparency |
| branding.md | Branding | Integrating brand identity within Apple's design language, subtle branding, custom tints |
| color.md | Color | System colors, Dynamic Colors, semantic colors, custom palettes, contrast ratios |
| dark-mode.md | Dark Mode | Elevated surfaces, semantic colors, adapted palettes, vibrancy, testing in both modes |
| icons.md | Icons | Glyph icons, SF Symbols integration, custom icon design, icon weights, optical alignment |
| images.md | Images | Image resolution, @2x/@3x assets, vector assets, image accessibility |
| immersive-experiences.md | Immersive Experiences | AR/VR design, spatial immersion, comfort zones, progressive immersion levels |
| inclusion.md | Inclusion | Diverse representation, non-gendered language, cultural sensitivity, inclusive defaults |
| layout.md | Layout | Margins, spacing, alignment, safe areas, adaptive layouts, readable content guides |
| materials.md | Materials | Vibrancy, blur, translucency, system materials, material thickness |
| motion.md | Motion | Animation curves, transitions, continuity, Reduce Motion support, physics-based motion |
| privacy.md | Privacy | Permission requests, usage descriptions, privacy nutrition labels, minimal data collection |
| right-to-left.md | Right-to-Left | RTL layout mirroring, bidirectional text, icons that flip, exceptions |
| sf-symbols.md | SF Symbols | Symbol categories, rendering modes, variable color, custom symbols, weight matching |
| spatial-layout.md | Spatial Layout | visionOS window placement, depth, ergonomic zones, Z-axis design |
| typography.md | Typography | SF Pro, Dynamic Type sizes, text styles, custom fonts, font weight hierarchy, line spacing |
| writing.md | Writing | UI copy guidelines, tone, capitalization rules, error messages, button labels, conciseness |
Show full SKILL.md (235 more words)Show less
Applying Foundations Together
Consider how principles interact:
Color + Dark Mode + Accessibility -- Custom palettes must work in both modes while maintaining WCAG contrast ratios. Start with system semantic colors.
Typography + Accessibility + Layout -- Dynamic Type must scale without breaking layouts. Use text styles and Auto Layout for the full range of type sizes.
Icons + Branding + SF Symbols -- Custom icons should match SF Symbols weight and optical sizing. Brand elements should integrate without overriding system conventions.
Motion + Accessibility + Feedback -- Every animation must have a Reduce Motion alternative. Motion should reinforce spatial relationships, not decorate.
Privacy + Writing + Onboarding -- Permission requests need clear, specific usage descriptions. Time them to when the user will understand the benefit.
Output Format
- Cite the specific HIG foundation with file and section.
- Note platform differences for the user's target platforms.
- Provide concrete code patterns (SwiftUI/UIKit/AppKit).
- Explain accessibility impact (contrast ratios, Dynamic Type scaling, VoiceOver behavior).
Questions to Ask
- Which platforms are you targeting?
- Do you have existing brand guidelines?
- What accessibility level are you targeting? (WCAG AA, AAA, Apple baseline?)
- System colors or custom?
Related Skills
- hig-platforms -- How foundations apply per platform (e.g., type scale differences on watchOS vs macOS)
- hig-patterns -- Interaction patterns where foundations like writing and accessibility are critical
- hig-components-layout -- Structural components implementing layout principles
- hig-components-content -- Content display using color, typography, and images
Built by Raintree Technology · More developer tools
© raintree-technology, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
SKILL.md and 18 other files (references) in skills/hig-foundations of raintree-technology/hig-doctor.
- SKILL.md
- references/accessibility.md
- references/app-icons.md
- references/branding.md
- references/color.md
- references/dark-mode.md
- references/icons.md
- references/images.md
- references/immersive-experiences.md
- references/inclusion.md
- references/layout.md
- references/materials.md
- references/motion.md
- references/privacy.md
- references/right-to-left.md
- references/sf-symbols.md
- references/spatial-layout.md
- references/typography.md
- references/writing.md
Open the folder on GitHubat commit 3ec08f5
Used in 5 other repositories
We found 18 copies of this SKILL.md (exact, near-identical or edited) in other folders, from 5 other GitHub owners. This page covers the copy in raintree-technology/hig-doctor, which our catalogue first saw on October 7, 2026.
- aiskillstore/marketplaceskills/sickn33/hig-foundations
- sickn33/agentic-awesome-skillsskills/hig-foundationsplugins/agentic-awesome-skills/skills/hig-foundations+2 more
- lingxling/awesome-skills-cnantigravity-awesome-skills/skills/hig-foundationsantigravity-awesome-skills/plugins/agentic-awesome-skills/skills/hig-foundations+2 more
- benjaminasterA/antigravity-awesome-skillsskills/hig-foundations
- henryalouf/ruflow.agents/skills/hig-foundations.agents/skills/antigravity-awesome-skills/skills/hig-foundations+6 more
Compare with similar skills
Hig Foundations 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.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Hig Foundations this skillraintree-technology/hig-doctor | 143 | 5 repos | ~1.8k | Automated safety check: Pass | MIT | |
| iOS Higjohnrogers/claude-swift-engineering | 231 | — | ~705 | Automated safety check: Pass | MIT | |
| UI UX Pro Maxsaoudi-h/solar-icons | 186 | 18 repos | ~11k | Automated safety check: Notes | Custom licence | |
| Color Auditrome-os/rome | 737 | — | ~2.7k | Automated safety check: Pass | MIT | |
| Ant Designkqcoxn/MaaPipelineEditor | 408 | 1 repos | ~1.1k | Automated safety check: Pass | MIT | |
| Better Colorstrycompai/crm | 11k | — | ~1.9k | Automated safety check: Pass | MIT |
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UI UX Pro Max
saoudi-h/solar-icons
UI/UX design intelligence for web and mobile. An agent skill from saoudi-h/solar-icons.
Color Audit
rome-os/rome
Audit a design system's color palette against measurable color-science disciplines — WCAG/APCA contrast of declared token pairs, perceptual (OKLCH) ramp uniformity, color-blindness safety of…
Ant Design
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Decision guide for antd 6.x, Ant Design Pro 5/ProComponents, Ant Design X v2, and the offline @ant-design/cli.
Better Colors
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OKLCH color space and color usage for web projects. An agent skill from trycompai/crm.
Data-Dense Dashboard Designer
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Lays out dense analytics or trading-terminal screens in banded sections with hand-drawn SVG charts, instead of a wall of identical stat cards.
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Related
Categories
Questions about Hig Foundations
What does Hig Foundations do?
Apple Human Interface Guidelines design foundations. An agent skill from raintree-technology/hig-doctor. Hig Foundations is an agent skill from raintree-technology/hig-doctor. Apple Human Interface Guidelines design foundations.
When should I use Hig Foundations?
Hig Foundations fits situations like: the user asks about HIG color; apple typography; dark mode guidelines; accessible design.
How do I install Hig Foundations in Claude Code?
Run `npx skills add raintree-technology/hig-doctor --skill hig-foundations -a claude-code`. Or copy the skill folder (skills/hig-foundations in raintree-technology/hig-doctor) into .claude/skills/hig-foundations in your project. Claude Code loads it when a task matches its description.
How do I install Hig Foundations in Codex?
Run `npx skills add raintree-technology/hig-doctor --skill hig-foundations -a codex`. Or copy the skill folder (skills/hig-foundations in raintree-technology/hig-doctor) into .agents/skills/hig-foundations in your project. Codex loads it when a task matches its description.
Can I use Hig Foundations 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 raintree-technology/hig-doctor --skill hig-foundations -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/hig-foundations, .gemini/skills/hig-foundations, .github/skills/hig-foundations and .opencode/skills/hig-foundations in your project.
What does Hig Foundations need to run?
SKILL.md names no scripts, command-line tools or credentials: Hig Foundations is instructions for the agent only.
Does Hig Foundations access the network?
SKILL.md names 1 domain. As links in the text: raintree.technology. This is read from the text; nothing was executed.
Is Hig Foundations 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 Hig Foundations use?
Hig Foundations is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Hig Foundations use?
About 1.8k tokens (SKILL.md is roughly 7k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 13k tokens, read only when the agent opens those files.
What are the alternatives to Hig Foundations?
Skills that share tags, products or a category with Hig Foundations: iOS Hig (johnrogers/claude-swift-engineering, 231 stars), UI UX Pro Max (saoudi-h/solar-icons, 186 stars), Color Audit (rome-os/rome, 737 stars) and Ant Design (kqcoxn/MaaPipelineEditor, 408 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Hig Foundations?
raintree-technology (a GitHub organization) maintains it in raintree-technology/hig-doctor, which has 143 GitHub stars. The repository holds 15 skills in this directory. The repository was last updated on September 11, 2026.
Source: raintree-technology/hig-doctor on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.