skill CX Codex

healthkit · prisma-labs-dev — Claude Code skill: HealthKit API reference

Q: How do I install healthkit in Claude?

Run `npx skills add Prisma-Labs-Dev/apple-skills --skill healthkit -a claude-code`. It places the skill at `~/.claude/skills/healthkit/SKILL.md`.

A skill that hands your agent the HealthKit docs: store operations, sample queries, workouts, unit conversions. Useful when you write iOS code and don't want to keep opening Apple's docs.

Install into Claude Code · Skills CLI (Vercel) All methods and platforms ↓

npx skills add Prisma-Labs-Dev/apple-skills --skill healthkit -a claude-code

Open on GitHub

What healthkit does

The skill is user-invocable and runs in a forked context with the Explore agent, so it searches its own reference files instead of your project. Six documents ship with it: a framework overview, hkhealthstore.md for store operations, hkquantitysample.md for samples like weight and heart rate, hkquantitytypeidentifier.md listing type identifiers, hksamplequery.md for queries, and hkunit.md for conversions.

Answers come back in a fixed shape: a short summary plus file paths for the full details. That keeps the agent from paraphrasing the whole reference. Ask about reading or writing health data and it works from these documents rather than guessing.

The skill answers API questions; it does not generate project code for you. You need Node.js with npx to install, since the command drops SKILL.md into the skills directory of the platform you pick.

What it helps with

find the right quantity type identifier for a sample
work out reading and writing health data through HKHealthStore
convert units with HKUnit
build a sample query with HKSampleQuery
check how workouts and quantity samples are handled

Example prompts for the agent

How do I read heart rate data with HKHealthStore?
Show me the quantity type identifiers for weight samples
How do I convert units in HKUnit?

How to install healthkit

1Skills CLI (Vercel)

npx skills add Prisma-Labs-Dev/apple-skills --skill healthkit -a claude-code

2Manually: put the files in place

~/.claude/skills/healthkit/SKILL.md

Copy the whole skill folder; for one project use .claude/skills/healthkit/

1Skills CLI (Vercel)

npx skills add Prisma-Labs-Dev/apple-skills --skill healthkit -a codex

2Manually: put the files in place

.agents/skills/healthkit/SKILL.md

For all projects use ~/.agents/skills/

1Skills CLI (Vercel)

npx skills add Prisma-Labs-Dev/apple-skills --skill healthkit -a cursor

2Manually: put the files in place

.cursor/skills/healthkit/SKILL.md

Cursor also reads .agents/skills/ and .claude/skills/

1GitHub CLI

gh skill install Prisma-Labs-Dev/apple-skills healthkit

2Manually: put the files in place

.github/skills/healthkit/SKILL.md

1Skills CLI (Vercel)

npx skills add Prisma-Labs-Dev/apple-skills --skill healthkit -a gemini-cli

2Platform CLI

gemini skills install https://github.com/Prisma-Labs-Dev/apple-skills --path skills/healthkit

Manually: put the files in place

.devin/skills/healthkit/SKILL.md

The legacy .windsurf/skills/ path still works

Skills CLI (Vercel)

npx skills add Prisma-Labs-Dev/apple-skills --skill healthkit -a opencode

Step by step, with commands for each platform: How to install skills in Claude Code: five ways

Questions about healthkit

How do I install healthkit in Claude?

Run npx skills add Prisma-Labs-Dev/apple-skills --skill healthkit -a claude-code. It places the skill at ~/.claude/skills/healthkit/SKILL.md.

What does healthkit do?

It acts as a HealthKit reference: the agent searches the bundled docs and returns a summary with paths to the relevant files.

Which platforms support the skill?

Claude, Codex, Cursor, GitHub Copilot, Gemini CLI and OpenCode, each with its own install command.

Source text

SKILL.md · MIT

---
name: healthkit
user-invocable: true
description: "API reference: HealthKit. Query for HKHealthStore, HKQuantitySample, workouts, health data read/write."
context: fork
agent: Explore
---

# HealthKit Documentation

Search these docs to answer questions about HealthKit APIs.

## Return Format

Always include:
1. **Summary** - Answer the question concisely
2. **File paths** - List relevant files for full details, e.g.:
   - `hkhealthstore.md` for HKHealthStore API
   - `hkunit.md` for unit conversions

## Files

- `healthkit-index.md` - Framework overview and all available APIs
- `hkhealthstore.md` - Health data store operations
- `hkquantitysample.md` - Quantity samples (weight, heart rate, etc.)
- `hkquantitytypeidentifier.md` - All quantity type identifiers
- `hksamplequery.md` - Querying health data
- `hkunit.md` - Units and conversions

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