core-motion SKILL.md skillA
core-motion from jordancoin/ios-skills-collection is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add jordancoin/ios-skills-collection/core-motion@git:20260329.893209fPins git:20260329.893209f in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- jordancoin/ios-skills-collection
- Path
skills/dpearson2699--core-motion/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260329.893209f, committed Mar 29, 2026
- Size
- 11,795 bytes
- Repository stars
- 6
- License
- a license file GitHub does not identify
Access accelerometer, gyroscope, magnetometer, pedometer, and activity-recognition data using CoreMotion. Use when reading device sensor data, counting steps, detecting user activity (walking/running/driving), tracking altitude changes, or implementing motion-based interactions in iOS/watchOS apps.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# CoreMotion Read device sensor data -- accelerometer, gyroscope, magnetometer, pedometer, and activity recognition -- on iOS and watchOS. CoreMotion fuses raw sensor inputs into processed device-motion data and provides pedometer/activity APIs for fitness and navigation use cases. Targets Swift 6.3 / iOS 26+. ## Contents - [Setup](#setup) - [CMMotionManager: Sensor Data](#cmmotionmanager-sensor-data) - [Processed Device Motion](#processed-device-motion) - [CMPedometer: Step and Distance Data](#cmpedometer-step-and-distance-data) - [CMMotionActivityManager: Activity Recognition](#cmmotionactivitymanager-activity-recognition) - [CMAltimeter: Altitude Data](#cmaltimeter-altitude-data) - [Update Intervals and Battery](#update-intervals-and-battery) - [Common Mistakes](#common-mistakes) - [Review Checklist](#review-checklist) - [References](#references) ## Setup ### Info.plist Add `NSMotionUsageDescription` to Info.plist with a user-facing string explaining why your app needs motion data. Without this key, the app crashes on first access. ```xml <key>NSMotionUsageDescription</key> <string>This app uses motion data to track your activity.</string> ``` ### Authorization …
Read the whole file at its exact version.
How to install
mdr add jordancoin/ios-skills-collection/core-motion@sha256:7beae6aba7442383The line at the top of this page pins the label git:20260329.893209f, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_4cljourdy2etdhbc)
5 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Mar 29, 2026.
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (11795 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
jordancoin/ios-skills-collection · 6 stars · license a license file GitHub does not identify · pushed 2026-09-10 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_4cljourdy2etdhbc GET https://markdownregistry.com/api/v1/resolve?ref=jordancoin/ios-skills-collection/core-motion GET https://markdownregistry.com/api/v1/blob/7beae6aba7442383d1892ce5d08b2a8292ffdfa808a57fbefd5a1958f94abeae
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.