Implement iOS authentication flows with Sign in with Apple, OAuth, and Keychain.
npx skills add https://github.com/onymchat/onym-ios --skill authentication-onymchat
Please help me install this Agent Skill. Skill: authentication Source: https://github.com/onymchat/onym-ios/tree/main/.claude/skills/authentication Command: npx skills add https://github.com/onymchat/onym-ios --skill authentication-onymchat
Implementing robust authentication flows on iOS— Sign in with Apple, OAuth, Password AutoFill, and biometric access—can be complex and error-prone. This Skill provides a comprehensive blueprint for secure, user-friendly sign-in, credential management, and token validation across modern iOS apps.
Set up an iOS app to enable Sign in with Apple, OAuth flow via ASWebAuthenticationSession, Password AutoFill, and biometric re-authentication, and implement server-side token validation and credential state checks.
High-intent search queries and answers about installing and using this skill.
Sign in with Apple integration uses ASAuthorizationAppleIDProvider to handle first-time data capture and subsequent credential state checks. This Skill provides the blueprint for securely requesting user authorization, managing credentials, and validating identity tokens server-side.
OAuth web-auth flows on iOS are best handled via ASWebAuthenticationSession. This Skill outlines how to manage third-party provider authentication, implement secure callback handling, and safely store the resulting access tokens in the Keychain.
Password AutoFill integrates with Keychain storage by using ASPasswordProvider to securely manage user credentials. This Skill covers how to combine AutoFill with LAContext biometric re-authentication to securely retrieve and store tokens during login and onboarding.
Server-side identity token validation requires verifying the cryptographic signature and claims of the token received from the iOS client. This Skill provides secure validation patterns and safe storage strategies to keep user access tokens synchronized.
Credential state monitoring and revocation handling keep user sessions safely in sync with Apple IDs. This Skill details how to implement continuous credential state checks to detect when an Apple ID revokes access, ensuring immediate session termination.
Biometric re-authentication via LAContext can be combined with Keychain storage for secure session refresh. This Skill demonstrates how to enforce biometric access requirements when retrieving sensitive tokens from the Keychain during active user sessions.
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