authentication SKILL.md skillA
authentication 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/authentication@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--authentication/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260329.893209f, committed Mar 29, 2026
- Size
- 17,786 bytes
- Repository stars
- 6
- License
- a license file GitHub does not identify
Implement iOS authentication patterns including Sign in with Apple (ASAuthorizationAppleIDProvider, ASAuthorizationController, ASAuthorizationAppleIDCredential), credential state checking, identity token validation, ASWebAuthenticationSession for OAuth and third-party auth flows, ASAuthorizationPasswordProvider for AutoFill credential suggestions, and biometric authentication with LAContext. Use when implementing Sign in with Apple, handling Apple ID credentials, building OAuth login flows…
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
# Authentication
Implement authentication flows on iOS using the AuthenticationServices
framework, including Sign in with Apple, OAuth/third-party web auth,
Password AutoFill, and biometric authentication.
## Contents
- [Sign in with Apple](#sign-in-with-apple)
- [Credential Handling](#credential-handling)
- [Credential State Checking](#credential-state-checking)
- [Token Validation](#token-validation)
- [Existing Account Setup Flows](#existing-account-setup-flows)
- [ASWebAuthenticationSession (OAuth)](#aswebauthenticationsession-oauth)
- [Password AutoFill Credentials](#password-autofill-credentials)
- [Biometric Authentication](#biometric-authentication)
- [SwiftUI SignInWithAppleButton](#swiftui-signinwithapplebutton)
- [Common Mistakes](#common-mistakes)
- [Review Checklist](#review-checklist)
- [References](#references)
## Sign in with Apple
Add the "Sign in with Apple" capability in Xcode before using these APIs.
### UIKit: ASAuthorizationController Setup
```swift
import AuthenticationServices
final class LoginViewController: UIViewController {
func startSignInWithApple() {
let provider = ASAuthorizationAppleIDProvider()
…Read the whole file at its exact version.
How to install
mdr add jordancoin/ios-skills-collection/authentication@sha256:b808db33356fb591The 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_2staf5qrqaft43nf)
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 (17786 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_2staf5qrqaft43nf GET https://markdownregistry.com/api/v1/resolve?ref=jordancoin/ios-skills-collection/authentication GET https://markdownregistry.com/api/v1/blob/b808db33356fb59192f2839324210788895dcdd6c540963530dded06df191b84
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.
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