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Run npx skillmds@latest add caglarbaranbora/authenticationservices in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

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Who published Authenticationservices?

caglarbaranbora (@caglarbaranbora) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Authenticationservices by caglarbaranbora

Name: Authenticationservices
Author: caglarbaranbora

Authenticationservices

Route Sign in with Apple implementation tasks to the correct Knowledge Contracts -- building the authorization request and reading the resulting credential, nonce generation and identity-token/authorization-code handling, credential-state checks and revocation reactions, and session persistence and sign-out. Use when calling ASAuthorizationAppleIDProvider, createRequest(), ASAuthorizationController, ASAuthorizationControllerDelegate, ASAuthorizationControllerPresentationContextProviding, ASAuthorizationAppleIDCredential, ASAuthorizationError, getCredentialState(forUserID:), ASAuthorizationAppleIDProvider.CredentialState, or credentialRevokedNotification. v1 is Sign in with Apple only -- no Password AutoFill/credential-provider extensions, no Passkeys/WebAuthn, no server-side JWT verification. Triggers on Sign in with Apple, AuthenticationServices, ASAuthorizationAppleIDProvider, ASAuthorizationAppleIDRequest, ASAuthorizationController, ASAuthorizationAppleIDCredential, identityToken, authorizationCode, nonce,

File contents

AuthenticationServices — Foundations Skill

Purpose

Route Sign in with Apple implementation tasks to the minimum required AuthenticationServices Knowledge Contracts. v1 scope is the ASAuthorizationAppleIDProvider/ASAuthorizationController Sign in with Apple flow only — no Password AutoFill/credential-provider extensions, no Passkeys/WebAuthn APIs, no server-side identity-token verification.

Routing

Load only the contracts relevant to the task. All paths relative to knowledge/authenticationservices/.

Building an ASAuthorizationAppleIDRequest via createRequest(), setting requestedScopes, driving ASAuthorizationController through its delegate/presentation-context protocols, or reading user/fullName/email/identityToken/authorizationCode/ASAuthorizationError from the result -> sign-in-with-apple-request-and-credential.md
Generating/hashing a nonce, or forwarding identityToken/authorizationCode to a backend -> nonce-and-identity-token-verification.md
Calling getCredentialState(forUserID:), branching on .authorized/.revoked/.notFound/.transferred, or observing credentialRevokedNotification -> credential-state-and-revocation.md
Deciding what to persist for a signed-in session, or sign-out behavior -> session-persistence-and-sign-out.md

Never load more than the contracts relevant to the specific question.

Stop Conditions

Stop and report if the requested topic has no matching Knowledge Contract in knowledge/authenticationservices/ — do not guess or fall back to general knowledge.

Password AutoFill / credential-provider extensions (ASCredentialProviderExtension, ASCredentialProviderViewController) — Deferred
Passkeys / WebAuthn (ASAuthorizationPlatformPublicKeyCredentialProvider, ASAuthorizationSecurityKeyPublicKeyCredentialProvider) — Deferred
Server-side JWT signature/claims verification of the identity token — Excluded, a backend responsibility this kit does not cover
"Sign in with Apple" button UI/HIG design — owned by human-interface-guidelines
Sign-in terminology and wording — owned by style-guide
General Keychain storage/CRUD — owned by security

Composing these with this Skill is workflow.authentication's job.

---name: authenticationservicesdescription: Route Sign in with Apple implementation tasks to the correct Knowledge Contracts -- building the authorization request and reading the resulting credential, nonce generation and identity-token/authorization-code handling, credential-state checks and revocation reactions, and session persistence and sign-out. Use when calling ASAuthorizationAppleIDProvider, createRequest(), ASAuthorizationController, ASAuthorizationControllerDelegate, ASAuthorizationControllerPresentationContextProviding, ASAuthorizationAppleIDCredential, ASAuthorizationError, getCredentialState(forUserID:), ASAuthorizationAppleIDProvider.CredentialState, or credentialRevokedNotification. v1 is Sign in with Apple only -- no Password AutoFill/credential-provider extensions, no Passkeys/WebAuthn, no server-side JWT verification. Triggers on Sign in with Apple, AuthenticationServices, ASAuthorizationAppleIDProvider, ASAuthorizationAppleIDRequest, ASAuthorizationController, ASAuthorizationAppleIDCredential, identityToken, authorizationCode, nonce,---# AuthenticationServices — Foundations Skill## PurposeRoute Sign in with Apple implementation tasks to the minimum requiredAuthenticationServices Knowledge Contracts. v1 scope is the`ASAuthorizationAppleIDProvider`/`ASAuthorizationController` Sign in withApple flow only — no Password AutoFill/credential-provider extensions,no Passkeys/WebAuthn APIs, no server-side identity-token verification.## RoutingLoad only the contracts relevant to the task. All paths relative toknowledge/authenticationservices/.- Building an `ASAuthorizationAppleIDRequest` via `createRequest()`, setting `requestedScopes`, driving `ASAuthorizationController` through its delegate/presentation-context protocols, or reading `user`/`fullName`/`email`/`identityToken`/`authorizationCode`/`ASAuthorizationError` from the result -> sign-in-with-apple-request-and-credential.md- Generating/hashing a nonce, or forwarding `identityToken`/`authorizationCode` to a backend -> nonce-and-identity-token-verification.md- Calling `getCredentialState(forUserID:)`, branching on `.authorized`/`.revoked`/`.notFound`/`.transferred`, or observing `credentialRevokedNotification` -> credential-state-and-revocation.md- Deciding what to persist for a signed-in session, or sign-out behavior -> session-persistence-and-sign-out.mdNever load more than the contracts relevant to the specific question.## Stop ConditionsStop and report if the requested topic has no matching KnowledgeContract in knowledge/authenticationservices/ — do not guess or fallback to general knowledge.- Password AutoFill / credential-provider extensions (`ASCredentialProviderExtension`, `ASCredentialProviderViewController`) — Deferred- Passkeys / WebAuthn (`ASAuthorizationPlatformPublicKeyCredentialProvider`, `ASAuthorizationSecurityKeyPublicKeyCredentialProvider`) — Deferred- Server-side JWT signature/claims verification of the identity token — Excluded, a backend responsibility this kit does not cover- "Sign in with Apple" button UI/HIG design — owned by `human-interface-guidelines`- Sign-in terminology and wording — owned by `style-guide`- General Keychain storage/CRUD — owned by `security`Composing these with this Skill is `workflow.authentication`'s job.

Frequently asked questions