# Watchos

> watchOS platform-specific development with complications, workouts, HealthKit, and Watch Connectivity. Use when building Apple Watch apps, health features, or iPhone-Watch communication. Use when this capability is needed.

- Skill: `tomevault-io/watchos` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds@latest add tomevault-io/watchos`
- Raw SKILL.md: https://api.skillmd.com/api/skills/tomevault-io/watchos/raw
- Safety review: pending (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: tomevault-io (https://skillmd.com/u/tomevault-io)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/tomevault-io/watchos

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# watchOS Platform

watchOS-specific development for Apple Watch experiences.

## Agent Workflow (MANDATORY)

Before ANY implementation, use `TeamCreate` to spawn 3 agents:

1. **fuse-ai-pilot:explore-codebase** - Analyze existing watchOS patterns
2. **fuse-ai-pilot:research-expert** - Verify latest watchOS 26 docs via Context7/Exa
3. **mcp__apple-docs__search_apple_docs** - Check watchOS patterns

After implementation, run **fuse-ai-pilot:sniper** for validation.

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## Overview

### When to Use

- Building Apple Watch apps
- Creating watch face complications
- Workout and fitness tracking
- Health data access (HealthKit)
- iPhone-Watch communication

### Why watchOS Skill

| Feature | Benefit |
|---------|---------|
| Complications | Glanceable data on watch face |
| Workouts | Fitness and health tracking |
| HealthKit | Access health metrics |
| Connectivity | Sync with iPhone |

---

## Reference Guide

| Need | Reference |
|------|-----------|
| Watch face complications | [complications.md](references/complications.md) |
| Workout sessions, HealthKit | [workouts.md](references/workouts.md) |
| iPhone ↔ Watch sync | [watch-connectivity.md](references/watch-connectivity.md) |

---

## Design Considerations

### Screen Size
- Small display, large touch targets
- Glanceable information
- Minimal text, clear icons

### Interactions
- Digital Crown for scrolling/input
- Force Touch (older watches)
- Gestures: swipe, tap

### Battery
- Minimize background work
- Use complications for updates
- Efficient data transfer

---

## Best Practices

1. **Glanceable** - Quick information access
2. **Large targets** - Easy tapping
3. **Minimal input** - Reduce typing
4. **Complications** - Update watch face data
5. **Background refresh** - Efficient updates
6. **Test on device** - Simulator differs from hardware

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<!-- tomevault:4.0:skill_md:2026-04-13 -->