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antigravity-skills-reference/skills/hig-components-system/SKILL.md
Ares 4a5f1234bb fix: harden registry tooling, make tests hermetic, and restore metadata consistency (#168)
* chore: upgrade maintenance scripts to robust PyYAML parsing

- Replaces fragile regex frontmatter parsing with PyYAML/yaml library
- Ensures multi-line descriptions and complex characters are handled safely
- Normalizes quoting and field ordering across all maintenance scripts
- Updates validator to strictly enforce description quality

* fix: restore and refine truncated skill descriptions

- Recovered 223+ truncated descriptions from git history (6.5.0 regression)
- Refined long descriptions into concise, complete sentences (<200 chars)
- Added missing descriptions for brainstorming and orchestration skills
- Manually fixed imagen skill description
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* chore: sync generated registry files and document fixes

- Regenerated skills index with normalized forward-slash paths
- Updated README and CATALOG to reflect restored descriptions
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* fix: restore missing skill and align metadata for full 955 count

- Renamed SKILL.MD to SKILL.md in andruia-skill-smith to ensure indexing
- Fixed risk level and missing section in andruia-skill-smith
- Synchronized all registry files for final 955 skill count

* chore(scripts): add cross-platform runners and hermetic test orchestration

* fix(scripts): harden utf-8 output and clone target writeability

* fix(skills): add missing date metadata for strict validation

* chore(index): sync generated metadata dates

* fix(catalog): normalize skill paths to prevent CI drift

* chore: sync generated registry files

* fix: enforce LF line endings for generated registry files
2026-03-01 09:38:25 +01:00

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Markdown

---
name: hig-components-system
description: 'Apple HIG guidance for system experience components: widgets, live activities, notifications, complications, home screen quick actions, top shelf, watch faces, app clips, and app shortcuts.'
risk: unknown
source: community
date_added: '2026-02-27'
---
# Apple HIG: System Experiences
Check for `.claude/apple-design-context.md` before asking questions. Use existing context and only ask for information not already covered.
## Key Principles
### General
1. **Glanceable, immediate value.** System experiences bring your app's most important content to surfaces the user sees without launching your app. Design for seconds of attention.
2. **Respect platform context.** A Lock Screen widget has different constraints than a Home Screen widget. A complication is far smaller than a top shelf item.
### Widgets
3. **Show relevant information, not everything.** Display the most useful subset, updated appropriately.
4. **Support multiple sizes with distinct layouts.** Each size should be a thoughtful design, not a scaled version of another.
5. **Deep-link on tap.** Take users to the relevant content, not the app's root screen.
### Live Activities
6. **Track events with a clear start and end.** Deliveries, scores, timers, rides. Design for both Dynamic Island and Lock Screen.
7. **Stay updated and timely.** Stale data undermines trust. End promptly when the event concludes.
### Notifications
8. **Respect user attention.** Only send notifications for information users genuinely care about. No promotional or low-value notifications.
9. **Actionable and self-contained.** Include enough context to understand and act without opening the app. Support notification actions. Use threading and grouping.
### Complications
10. **Focused data on the watch face.** Design for the smallest useful representation. Support multiple families. Budget updates wisely.
### Home Screen Quick Actions
11. **3-4 most common tasks.** Short titles, optional subtitles, relevant SF Symbol icons.
### Top Shelf
12. **tvOS showcase.** Feature content that entices: new episodes, featured items, recent content.
### App Clips
13. **Instant, focused functionality within a strict size budget.** Load quickly without App Store download. Only what's needed for the immediate task, then offer full app install.
### App Shortcuts
14. **Surface key actions to Siri and Spotlight.** Define shortcuts for frequent tasks. Use natural, conversational trigger phrases.
## Reference Index
| Reference | Topic | Key content |
|---|---|---|
| [widgets.md](references/widgets.md) | Widgets | Glanceable info, sizes, deep linking, timeline |
| [live-activities.md](references/live-activities.md) | Live Activities | Real-time tracking, Dynamic Island, Lock Screen |
| [notifications.md](references/notifications.md) | Notifications | Attention, actions, grouping, content |
| [complications.md](references/complications.md) | Complications | Watch face data, families, budgeted updates |
| [home-screen-quick-actions.md](references/home-screen-quick-actions.md) | Quick actions | Haptic Touch, common tasks, SF Symbols |
| [top-shelf.md](references/top-shelf.md) | Top shelf | Featured content, showcase |
| [app-clips.md](references/app-clips.md) | App Clips | Instant use, lightweight, focused task, NFC/QR |
| [watch-faces.md](references/watch-faces.md) | Watch faces | Custom complications, face sharing |
| [app-shortcuts.md](references/app-shortcuts.md) | App Shortcuts | Siri, Spotlight, voice triggers |
## Output Format
1. **System experience recommendation** -- which surface best fits the use case.
2. **Content strategy** -- what to display, priority, what to omit.
3. **Update frequency** -- refresh rate including system budget constraints.
4. **Size/family variants** -- which to support and how layout adapts.
5. **Deep link behavior** -- where tapping takes the user.
## Questions to Ask
1. What information needs to surface outside the app?
2. Which platform?
3. How frequently does the data update?
4. What is the primary glanceable need?
## Related Skills
- **hig-components-status** -- Progress indicators in widgets or Live Activities
- **hig-inputs** -- Interaction patterns for system experiences (Digital Crown for complications)
- **hig-technologies** -- Siri for App Shortcuts, HealthKit for complications, NFC for App Clips
---
*Built by [Raintree Technology](https://raintree.technology) · [More developer tools](https://raintree.technology)*
## When to Use
This skill is applicable to execute the workflow or actions described in the overview.