⚡

// Skill profile

HealthKit Code Review

Name: HealthKit Code Review
Author: anderskev

name: healthkit-code-review

by anderskev · published 2026-04-01

开发工具数据处理

Total installs

Stars

★ 0

Last updated

2026-04

// Install command

$ claw add gh:anderskev/anderskev-healthkit-code-review

View on GitHub

// Full documentation

---

name: healthkit-code-review

description: Reviews HealthKit code for authorization patterns, query usage, background delivery, and data type handling. Use when reviewing code with import HealthKit, HKHealthStore, HKSampleQuery, HKObserverQuery, or HKQuantityType.

---

# HealthKit Code Review

Quick Reference

| Issue Type | Reference |

|------------|-----------|

| HKHealthStore, permissions, status checks, privacy | [references/authorization.md](references/authorization.md) |

| HKQuery types, predicates, anchored queries, statistics | [references/queries.md](references/queries.md) |

| Background delivery, observer queries, completion handlers | [references/background.md](references/background.md) |

| HKQuantityType, HKCategoryType, workouts, units | [references/data-types.md](references/data-types.md) |

Review Checklist

[ ] `HKHealthStore.isHealthDataAvailable()` called before any HealthKit operations

[ ] Authorization requested only for needed data types (minimal permissions)

[ ] `requestAuthorization` completion handler not misinterpreted as permission granted

[ ] No attempt to determine read permission status (privacy by design)

[ ] Query results dispatched to main thread for UI updates

[ ] `HKObjectQueryNoLimit` used only with bounded predicates

[ ] `HKStatisticsQuery` used for aggregations instead of manual summing

[ ] Observer query `completionHandler()` always called (use `defer`)

[ ] Background delivery registered in `application(_:didFinishLaunchingWithOptions:)`

[ ] Background delivery entitlement added (iOS 15+)

[ ] Correct units used for quantity types (e.g., `count/min` for heart rate)

[ ] Long-running queries stored as properties and stopped in `deinit`

When to Load References

Reviewing authorization/permissions flow -> authorization.md

Reviewing HKSampleQuery, HKAnchoredObjectQuery, or predicates -> queries.md

Reviewing HKObserverQuery or `enableBackgroundDelivery` -> background.md

Reviewing HKQuantityType, HKCategoryType, or HKWorkout -> data-types.md

Review Questions

1. Is `isHealthDataAvailable()` checked before creating HKHealthStore?

2. Does the code gracefully handle denied permissions (empty results)?

3. Are observer query completion handlers called in all code paths?

4. Is work in background handlers minimal (~15 second limit)?

5. Are HKQueryAnchors persisted per sample type (not shared)?

// Comments

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