device-integrity SKILL.md skillA
device-integrity 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/device-integrity@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--device-integrity/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260329.893209f, committed Mar 29, 2026
- Size
- 14,345 bytes
- Repository stars
- 6
- License
- a license file GitHub does not identify
Verify device legitimacy and app integrity using DeviceCheck (DCDevice per-device bits) and App Attest (DCAppAttestService key generation, attestation, and assertion flows). Use when implementing fraud prevention, detecting compromised devices, validating app authenticity with Apple's servers, protecting sensitive API endpoints with attested requests, or adding device verification to a backend architecture.
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
# Device Integrity Verify that requests to your server come from a genuine Apple device running your unmodified app. DeviceCheck provides per-device bits for simple flags (e.g., "claimed promo offer"). App Attest uses Secure Enclave keys and Apple attestation to cryptographically prove app legitimacy on each request. ## Contents - [DCDevice (DeviceCheck Tokens)](#dcdevice-devicecheck-tokens) - [DCAppAttestService (App Attest)](#dcappattestservice-app-attest) - [App Attest Key Generation](#app-attest-key-generation) - [App Attest Attestation Flow](#app-attest-attestation-flow) - [App Attest Assertion Flow](#app-attest-assertion-flow) - [Server Verification Guidance](#server-verification-guidance) - [Error Handling](#error-handling) - [Common Patterns](#common-patterns) - [Common Mistakes](#common-mistakes) - [Review Checklist](#review-checklist) - [References](#references) ## DCDevice (DeviceCheck Tokens) [`DCDevice`](https://sosumi.ai/documentation/devicecheck/dcdevice) generates a unique, ephemeral token that identifies a device. The token is sent to your server, which then communicates with Apple's servers to read or set two per-device bits. Available on iOS 11+. …
Read the whole file at its exact version.
How to install
mdr add jordancoin/ios-skills-collection/device-integrity@sha256:daf1b700d5a223e3The 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_qotp2shgpvdobmdk)
4 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 (14345 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_qotp2shgpvdobmdk GET https://markdownregistry.com/api/v1/resolve?ref=jordancoin/ios-skills-collection/device-integrity GET https://markdownregistry.com/api/v1/blob/daf1b700d5a223e35ad514c850097e504cc56b9b0a173acf0693344ac35ba570
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.