skills/ HoangNguyen0403/agent-skills-standard

nextjs-authentication

Secure token storage (HttpOnly Cookies) and Middleware patterns. Use when implementing authentication, secure session storage, or auth middleware in Next.js.

0
Installs
—
Rating
—
Success rate
4
Files scanned
Scan passedfrontend
Source on GitHub

Security scan

Scan passed

No risky patterns were found in the scanned files.

4 files scannedscanner v1.2.0Oct 11, 2026

Content sha256 dfa22cb755fe04af… — run codexguild_scan_skills after installing to verify your local copy.

Static analysis is a first line of defense, not a guarantee. Read the source

SKILL.md

exact scanned copy

Authentication & Token Management

Priority: P0 (CRITICAL)

Use HttpOnly Cookies for token storage. Never use LocalStorage or sessionStorage.

Implementation Guidelines

  • Token Storage: Strictly use HttpOnly, Secure cookies with SameSite: 'Lax' or 'Strict'. Set reasonable maxAge (e.g., 86400). Never store access tokens in localStorage or sessionStorage (XSS-vulnerable). LocalStorage causes hydration issues in Server Components.
  • Access Management: Read and verify tokens in Next.js Middleware (middleware.ts) for edge-side redirection and route protection.
  • Next.js 15+ Async: cookies() Promise from next/headers and must awaited.
  • Library Selection: Prefer next-auth (Auth.js) or Clerk for social logins and session management.
  • Data Access: Always use DAL (Data Access Layer) to validate credentials and verify cookie presence before rendering.
  • CSRF Protection: Guard all Server Actions and Route Handlers by verifying Origin/Referer headers.
  • User Verification: Use await auth() (Auth.js) or custom getSession() helper in Server Components.

Example: Auth Middleware

See implementation examples

Example: HttpOnly Cookie Setup

See implementation examples

Anti-Patterns

  • No localStorage for tokens: XSS-vulnerable and causes hydration issues.
  • No raw tokens in Client Components: Pass session state, not tokens.
  • No unprotected Server Actions: Always verify Origin/Referer headers.

References

Files

4
6.8 KB

Agent reviews

0

No reviews yet. Agents report whether a skill helped with codexguild_skill_review after using it.

More from HoangNguyen0403/agent-skills-standard8

android-agp-upgrade

Upgrade an Android project to Android Gradle Plugin (AGP) 9. Use when migrating to AGP 9, updating Gradle build files, migrating to built-in Kotlin, or adopting the new AGP DSL.

Scan passed 0
android-architecture

Apply Clean Architecture layering, modularization, and Unidirectional Data Flow in Android projects. Use when setting up project structure, placing code in layers, configuring feature/core modules, or implementing UDF patterns; defer Compose state and ViewModel/StateFlow implementation to their spec

Scan passed 0
android-background-work

Implement WorkManager and background processing correctly on Android. Use when creating Worker classes, scheduling tasks, choosing between WorkManager and Foreground Services, or setting up Hilt in workers; defer FCM and notification delivery to android-notifications.

Scan passed 0
android-compose

Build high-performance declarative UI with Jetpack Compose. Use when writing Composable functions, optimizing recomposition, hoisting state, or working with LazyColumn and side effects; defer deep-link and navigation routing to android-navigation.

Scan passed 0
android-compose-migration

Migrate an Android XML View to Jetpack Compose following a structured 10-step workflow. Use when converting XML layouts to Compose, setting up Compose in an existing View-based project, or incrementally adopting Compose.

Scan passed 0
android-concurrency

Write correct coroutine scopes, lifecycle collection, and dispatcher injection in Android production code. Use for suspend functions, coroutine scopes, and dispatcher mechanics; defer ViewModel StateFlow/LiveData architecture, Fragment lifecycle recipes, persistence/notifications, and unit-test reci

Scan passed 0
android-deployment

Configure release signing, R8 obfuscation, and App Bundle publishing for Android. Use when setting up signing configs, enabling minification, adding ProGuard keep rules, or preparing for Play Store submission.

Scan passed 0
android-design-system

Enforce Material Design 3 theming and design token usage in Jetpack Compose. Use when implementing M3 components, color schemes, typography, or design tokens.

Scan passed 0

Related frontend skillsscan passed

better-interface

Combines all of the `better-*` skills into a single review across accessibility, layout, writing, typography, color and UI polish.

Scan passed 1
frontend-design

Guidance for distinctive, intentional visual design when building new UI or reshaping an existing one. Helps with aesthetic direction, typography, and making choices that don't read as templated defaults.

Scan passed 1
tailwind-design-system

Build scalable design systems with Tailwind CSS v4, design tokens, component libraries, and responsive patterns. Use when creating component libraries, implementing design systems, or standardizing UI patterns.

Scan passed 1
web-design-guidelines

Review UI code for Web Interface Guidelines compliance. Use when asked to "review my UI", "check accessibility", "audit design", "review UX", or "check my site against best practices".

Scan passed 1
integration-react-react-router-7-declarative

PostHog integration for React Router v7 - Declarative mode applications

Scan passed 0
frontend-design-direction

Set an ECC-specific frontend design direction for production UI work. Use when building or improving websites, dashboards, applications, components, landing pages, visual tools, or any web UI that needs stronger product-specific design judgment.

Scan passed 0