New: 98,000+ skills indexed from GitHub repos with 100+ stars · every skill safety-checkedBrowse top skillsTop skills
Esc to closeBrowse all skills
Submit a skillBrowse skills
Submit a skillBrowse skills

Agent skill

Nextjs Authentication

by HoangNguyen0403 in HoangNguyen0403/agent-skills-standard

Secure token storage (HttpOnly Cookies) and Middleware patterns.

MITAuto-check passedBackend & APIs

Install Nextjs Authentication

skills CLI
$ npx skills add HoangNguyen0403/agent-skills-standard --skill nextjs-authentication -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install HoangNguyen0403/agent-skills-standard nextjs-authentication --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/HoangNguyen0403/agent-skills-standard.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/nextjs/nextjs-authentication .claude/skills/nextjs-authentication && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
nextjs-authentication
GitHub stars
572
Token cost
~508 tokens
SKILL.md length
180 words
Files
4 (incl. references)
Skills in repo
211
Repo updated
First seen
Licence
MIT

At a glance

Secure token storage (HttpOnly Cookies) and Middleware patterns.

  • Implementing authentication
  • SKILL.md covers Priority: P0 (CRITICAL), Implementation Guidelines, Anti-Patterns and References
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
  • Secure session storage

What it does

Nextjs Authentication is an agent skill from HoangNguyen0403/agent-skills-standard. Secure token storage (HttpOnly Cookies) and Middleware patterns. Use when implementing authentication, secure session storage, or auth middleware in Next.js.

Its SKILL.md is about 510 tokens, which your agent loads only when the skill is triggered. The skill folder holds 5 other files, including reference files (for example `evals/evals.json`, `references/auth-implementation.md` and `references/implementation.md`).

It sits in Backend & APIs, covering Authentication. It works with Next.js. The repository describes itself as: A collection of Agent Skills Standard and Best Practice for Programming Languages, Frameworks that help our AI Agent follow best practies on frameworks and programming laguages. The licence is MIT.

When your agent uses it

  • Implementing authentication
  • Secure session storage
  • Auth middleware in Next.js

Example prompts

  • “/nextjs-authentication”

What it can do on your machine

Read from SKILL.md and the folder at commit b529c2d. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md.

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Nextjs Authentication loads about 508 tokens when it runs, and up to ~1.2k if it reads all its reference files. Until then it costs about 45 tokens; SKILL.md has 180 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~45
When it runs · the whole SKILL.md, loaded when a task matches
~508
With references · SKILL.md plus every file in references/, read only if the agent opens them
~1.2k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from HoangNguyen0403/agent-skills-standard at commit b529c2d, republished under its MIT licence (© HoangNguyen0403). 180 words, ~508 tokens.

Download SKILL.mdSave it as .claude/skills/nextjs-authentication/SKILL.md (or your agent's skills folder). This skill also uses 3 other files; get the full folder from GitHub.
name
nextjs-authentication
description
Secure token storage (HttpOnly Cookies) and Middleware patterns. Use when implementing authentication, secure session storage, or auth middleware in Next.js.

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

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

© HoangNguyen0403, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 3 other files (references) in skills/nextjs/nextjs-authentication of HoangNguyen0403/agent-skills-standard.

  • SKILL.md
  • evals/evals.json
  • references/auth-implementation.md
  • references/implementation.md

Open the folder on GitHubat commit b529c2d

Compare with similar skills

Nextjs Authentication next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Nextjs Authentication compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Nextjs Authentication this skillHoangNguyen0403/agent-skills-standard572—~508Automated safety check: PassMIT
Supabase Development and Debuggingsupabase/agent-skills2.7k3 repos~3.6kAutomated safety check: PassMIT
Supabasecurvenote/curvenote1705 repos~2.2kAutomated safety check: PassCustom licence
Edgeone Pages Website SkeletonTencentEdgeOne/awesome-website-prompts-and-skills185—~2.2kAutomated safety check: NotesMIT
Clerk Setupgrowupanand/ConvoForm102—~3kAutomated safety check: PassMIT
Wp Headless And Wpgraphqljorgerosal/wordpress-skills103—~1.7kAutomated safety check: PassMIT

Similar skills

  • Supabase Development and Debugging

    supabase/agent-skills

    Official

    General Supabase skill for database, auth, Edge Functions, Realtime and storage work, plus client libraries, migrations, security audits, debugging and reading logs.

    2.7k GitHub starsUsed in 3 repos~3.6k tokens
    Backend & APIsAuto-check passed

  • Supabase

    curvenote/curvenote

    A skill your agent uses when doing ANY task involving Supabase.

    170 GitHub starsUsed in 5 repos~2.2k tokens
    Backend & APIsAuto-check passed

  • Edgeone Pages Website Skeleton

    TencentEdgeOne/awesome-website-prompts-and-skills

    基于 EdgeOne Pages 的全栈网站生成方案。用户说一句话（如「帮我建一个电商站」「做一个AI客服站」「做个管理后台」），AI 自动组合 Auth、Cart、Payment、AI Chat、Admin 五大模块，生成完整 Next.js 前后端代码并部署到 EdgeOne Pages 全球 CDN。支持电商、AI 助手、SaaS 管理后台三大模板。底层使用 Edge…

    185 GitHub stars~2.2k tokensUpdated 4 mo ago
    Backend & APIsAuto-check: notes

  • Clerk Setup

    growupanand/ConvoForm

    Set up Clerk authentication in any project with the Clerk CLI and official framework quickstarts.

    102 GitHub stars~3k tokensUpdated yesterday
    Backend & APIsAuto-check passed

  • Wp Headless And Wpgraphql

    jorgerosal/wordpress-skills

    Headless WordPress and WPGraphQL review guidance. An agent skill from jorgerosal/wordpress-skills.

    103 GitHub stars~1.7k tokensUpdated 4 mo ago
    Backend & APIsAuto-check passed

  • Fullstack Dev

    HHU3637kr/skills

    Full-stack backend architecture and frontend-backend integration guide.

    145 GitHub starsUsed in 3 repos~8.6k tokens
    Backend & APIsAuto-check: notes

More from HoangNguyen0403/agent-skills-standard

All 211 skills in this repo

  • Subagent-Driven Development

    HoangNguyen0403/agent-skills-standard

    Runs a multi-task implementation plan by sending each task to a fresh implementer subagent, reviewing it independently, then reviewing the whole branch.

    572 GitHub stars~1.3k tokensUpdated yesterday
    Auto-check passed

  • draw.io Architecture Diagramming

    HoangNguyen0403/agent-skills-standard

    Draws architecture diagrams as editable draw.io files from a JSON spec, with a fixed house style, one C4 level per diagram and evidence-tagged shapes.

    572 GitHub stars~1.3k tokensUpdated yesterday
    Auto-check passed

  • Android Navigation 3 Guide

    HoangNguyen0403/agent-skills-standard

    Implements and migrates to Jetpack Navigation 3 in Compose: NavDisplay, typed route objects, a state-list back stack, deep links, multiple back stacks and dialog scenes.

    572 GitHub stars~687 tokensUpdated yesterday
    Auto-check passed

  • Angular HttpClient Standards

    HoangNguyen0403/agent-skills-standard

    Sets rules for Angular HTTP code: functional interceptors, typed requests, services that own every call, and httpResource for reactive data loading in Angular 17+.

    572 GitHub stars~652 tokensUpdated yesterday
    Auto-check passed

  • Angular Tooling

    HoangNguyen0403/agent-skills-standard

    Angular CLI usage, code generation, build configuration, and bundle optimization.

    572 GitHub stars~743 tokensUpdated yesterday
    Auto-check passed

  • Common Code Review

    HoangNguyen0403/agent-skills-standard

    Conduct high-quality, persona-driven code reviews. An agent skill from HoangNguyen0403/agent-skills-standard.

    572 GitHub stars~772 tokensUpdated yesterday
    Auto-check passed

Works with

Categories

Questions about Nextjs Authentication

What does Nextjs Authentication do?

Secure token storage (HttpOnly Cookies) and Middleware patterns. Nextjs Authentication is an agent skill from HoangNguyen0403/agent-skills-standard. Secure token storage (HttpOnly Cookies) and Middleware patterns.

When should I use Nextjs Authentication?

Nextjs Authentication fits situations like: implementing authentication; secure session storage; auth middleware in Next.js.

How do I install Nextjs Authentication in Claude Code?

Run `npx skills add HoangNguyen0403/agent-skills-standard --skill nextjs-authentication -a claude-code`. Or copy the skill folder (skills/nextjs/nextjs-authentication in HoangNguyen0403/agent-skills-standard) into .claude/skills/nextjs-authentication in your project. Claude Code loads it when a task matches its description.

How do I install Nextjs Authentication in Codex?

Run `npx skills add HoangNguyen0403/agent-skills-standard --skill nextjs-authentication -a codex`. Or copy the skill folder (skills/nextjs/nextjs-authentication in HoangNguyen0403/agent-skills-standard) into .agents/skills/nextjs-authentication in your project. Codex loads it when a task matches its description.

Can I use Nextjs Authentication in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add HoangNguyen0403/agent-skills-standard --skill nextjs-authentication -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/nextjs-authentication, .gemini/skills/nextjs-authentication, .github/skills/nextjs-authentication and .opencode/skills/nextjs-authentication in your project.

What does Nextjs Authentication need to run?

SKILL.md names no scripts, command-line tools or credentials: Nextjs Authentication is instructions for the agent only.

Does Nextjs Authentication access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Nextjs Authentication safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Nextjs Authentication use?

Nextjs Authentication is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Nextjs Authentication use?

About 508 tokens (SKILL.md is roughly 2k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 671 tokens, read only when the agent opens those files.

What are the alternatives to Nextjs Authentication?

Skills that share tags, products or a category with Nextjs Authentication: Supabase Development and Debugging (supabase/agent-skills, 2.7k stars), Supabase (curvenote/curvenote, 170 stars), Edgeone Pages Website Skeleton (TencentEdgeOne/awesome-website-prompts-and-skills, 185 stars) and Clerk Setup (growupanand/ConvoForm, 102 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Nextjs Authentication?

HoangNguyen0403 (a GitHub user) maintains it in HoangNguyen0403/agent-skills-standard, which has 572 GitHub stars. The repository holds 211 skills in this directory. The repository was last updated on October 9, 2026.

Source: HoangNguyen0403/agent-skills-standard on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.