Core Web Vitals
vmDeshpande/ai-agent-automation
Optimize Core Web Vitals (LCP, INP, CLS) for better page experience and search ranking.
Optimize images, fonts, scripts, and metadata for Next.js performance and Core Web Vitals.
Install Nextjs Optimization
$ npx skills add HoangNguyen0403/agent-skills-standard --skill nextjs-optimization -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install HoangNguyen0403/agent-skills-standard nextjs-optimization --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ 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-optimization .claude/skills/nextjs-optimization && rm -rf skills-srcUse ~/.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/
Install the "nextjs-optimization" agent skill from https://github.com/HoangNguyen0403/agent-skills-standard/tree/develop/skills/nextjs/nextjs-optimization into .claude/skills/nextjs-optimization/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "nextjs-optimization", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/HoangNguyen0403/agent-skills-standard/tree/develop/skills/nextjs/nextjs-optimizationType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add HoangNguyen0403/agent-skills-standard --skill nextjs-optimization -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install HoangNguyen0403/agent-skills-standard nextjs-optimization --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/HoangNguyen0403/agent-skills-standard.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/nextjs/nextjs-optimization .agents/skills/nextjs-optimization && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "nextjs-optimization" agent skill from https://github.com/HoangNguyen0403/agent-skills-standard/tree/develop/skills/nextjs/nextjs-optimization into .agents/skills/nextjs-optimization/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "nextjs-optimization", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add HoangNguyen0403/agent-skills-standard --skill nextjs-optimization -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install HoangNguyen0403/agent-skills-standard nextjs-optimization --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/HoangNguyen0403/agent-skills-standard.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/nextjs/nextjs-optimization .cursor/skills/nextjs-optimization && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "nextjs-optimization" agent skill from https://github.com/HoangNguyen0403/agent-skills-standard/tree/develop/skills/nextjs/nextjs-optimization into .cursor/skills/nextjs-optimization/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "nextjs-optimization", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/HoangNguyen0403/agent-skills-standard.git --path skills/nextjs/nextjs-optimization--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add HoangNguyen0403/agent-skills-standard --skill nextjs-optimization -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install HoangNguyen0403/agent-skills-standard nextjs-optimization --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/HoangNguyen0403/agent-skills-standard.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/nextjs/nextjs-optimization .gemini/skills/nextjs-optimization && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "nextjs-optimization" agent skill from https://github.com/HoangNguyen0403/agent-skills-standard/tree/develop/skills/nextjs/nextjs-optimization into .gemini/skills/nextjs-optimization/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "nextjs-optimization", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install HoangNguyen0403/agent-skills-standard nextjs-optimizationInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add HoangNguyen0403/agent-skills-standard --skill nextjs-optimization -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/HoangNguyen0403/agent-skills-standard.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/nextjs/nextjs-optimization .github/skills/nextjs-optimization && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "nextjs-optimization" agent skill from https://github.com/HoangNguyen0403/agent-skills-standard/tree/develop/skills/nextjs/nextjs-optimization into .github/skills/nextjs-optimization/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "nextjs-optimization", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add HoangNguyen0403/agent-skills-standard --skill nextjs-optimization -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install HoangNguyen0403/agent-skills-standard nextjs-optimization --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/HoangNguyen0403/agent-skills-standard.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/nextjs/nextjs-optimization .opencode/skills/nextjs-optimization && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "nextjs-optimization" agent skill from https://github.com/HoangNguyen0403/agent-skills-standard/tree/develop/skills/nextjs/nextjs-optimization into .opencode/skills/nextjs-optimization/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "nextjs-optimization", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
nextjs-optimization- GitHub stars
- 572
- Token cost
- ~533 tokens
- SKILL.md length
- 183 words
- Files
- 3 (incl. references)
- Skills in repo
- 211
- Repo updated
- First seen
- Licence
- MIT
At a glance
Optimize images, fonts, scripts, and metadata for Next.js performance and Core Web Vitals.
- Configuring next/image for LCP
- SKILL.md covers Priority: P1 (HIGH), Monitoring (Core Web Vitals), Images and Fonts, plus 4 more sections
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
- Next/font for zero layout shift
What it does
Nextjs Optimization is an agent skill from HoangNguyen0403/agent-skills-standard. Optimize images, fonts, scripts, and metadata for Next.js performance and Core Web Vitals. Use when configuring next/image for LCP, next/font for zero layout shift, next/script loading strategies, or generateMetadata for SEO.
Its SKILL.md is about 530 tokens, which your agent loads only when the skill is triggered. The skill folder holds 4 other files, including reference files (for example `evals/evals.json` and `references/example.md`).
It sits in Frontend & Design, covering Web performance. 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
- Configuring next/image for LCP
- Next/font for zero layout shift
- Next/script loading strategies
- GenerateMetadata for SEO
Example prompts
- “/nextjs-optimization”
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 Optimization loads about 533 tokens when it runs, and up to ~752 if it reads all its reference files. Until then it costs about 61 tokens; SKILL.md has 183 words of instructions outside code blocks.
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). 183 words, ~533 tokens.
Download SKILL.mdSave it as
.claude/skills/nextjs-optimization/SKILL.md (or your agent's skills folder). This skill also uses 2 other files; get the full folder from GitHub.- name
- nextjs-optimization
- description
- Optimize images, fonts, scripts, and metadata for Next.js performance and Core Web Vitals. Use when configuring next/image for LCP, next/font for zero layout shift, next/script loading strategies, or generateMetadata for SEO.
Optimization
Priority: P1 (HIGH)
Core optimization primitives provided by Next.js. Monitor First, Optimize Later.
Monitoring (Core Web Vitals)
- LCP (Largest Contentful Paint): Target < 2.5s.
- CLS (Cumulative Layout Shift): Target < 0.1.
- INP (Interaction to Next Paint): Target < 200ms.
- Tools: Chrome DevTools "Performance" tab,
next/speed-insights,React Profiler.
Images
Always use next/image to prevent CLS and enable automatic optimization:
Fonts
Use next/font for zero layout shift — self-hosts fonts and adds font-display: swap:
Metadata (SEO)
Scripts
Use next/script with appropriate loading strategies:
beforeInteractive: Critical scripts (polyfills).afterInteractive: Analytics (Google Analytics).lazyOnload: Chat widgets, social embeds.
Bundle & Components
- Analyze with
@next/bundle-analyzer. Prune heavy libraries; use ESM-tree-shakable dependencies. - Use
dynamicimports withSuspensefor large components not needed at initial render. - Enable
ppr: true(Partial Prerendering) in Next.js 15+ for static shell + dynamic islands.
Anti-Patterns
- No
<img>tag: Usenext/imageto prevent CLS and enable automatic optimization. - No Google Fonts CDN link: Use
next/fontto self-host and eliminate layout shift. - No metadata in
_document.tsx: Useexport const metadataorgenerateMetadata(). - No 3rd-party scripts in
<head>: Usenext/scriptwith appropriatestrategy.
© 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 2 other files (references) in skills/nextjs/nextjs-optimization of HoangNguyen0403/agent-skills-standard.
- SKILL.md
- evals/evals.json
- references/example.md
Open the folder on GitHubat commit b529c2d
Compare with similar skills
Nextjs Optimization 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.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Nextjs Optimization this skillHoangNguyen0403/agent-skills-standard | 572 | — | ~533 | Automated safety check: Pass | MIT | |
| Core Web VitalsvmDeshpande/ai-agent-automation | 178 | 4 repos | ~3.6k | Automated safety check: Pass | MIT | |
| React Best Practicesryokun6/ryos | 1.3k | — | ~2k | Automated safety check: Pass | MIT | |
| Senior Frontendalirezarezvani/claude-skills | 28k | 5 repos | ~3.9k | Automated safety check: Pass | MIT | |
| Next.js DeveloperJeffallan/claude-skills | 12k | — | ~1.4k | Automated safety check: Pass | MIT | |
| React ExpertJeffallan/claude-skills | 12k | — | ~1.4k | Automated safety check: Pass | MIT |
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Questions about Nextjs Optimization
What does Nextjs Optimization do?
Optimize images, fonts, scripts, and metadata for Next.js performance and Core Web Vitals. Nextjs Optimization is an agent skill from HoangNguyen0403/agent-skills-standard.js performance and Core Web Vitals.
When should I use Nextjs Optimization?
Nextjs Optimization fits situations like: configuring next/image for LCP; Next/font for zero layout shift; Next/script loading strategies; generateMetadata for SEO.
How do I install Nextjs Optimization in Claude Code?
Run `npx skills add HoangNguyen0403/agent-skills-standard --skill nextjs-optimization -a claude-code`. Or copy the skill folder (skills/nextjs/nextjs-optimization in HoangNguyen0403/agent-skills-standard) into .claude/skills/nextjs-optimization in your project. Claude Code loads it when a task matches its description.
How do I install Nextjs Optimization in Codex?
Run `npx skills add HoangNguyen0403/agent-skills-standard --skill nextjs-optimization -a codex`. Or copy the skill folder (skills/nextjs/nextjs-optimization in HoangNguyen0403/agent-skills-standard) into .agents/skills/nextjs-optimization in your project. Codex loads it when a task matches its description.
Can I use Nextjs Optimization 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-optimization -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-optimization, .gemini/skills/nextjs-optimization, .github/skills/nextjs-optimization and .opencode/skills/nextjs-optimization in your project.
What does Nextjs Optimization need to run?
SKILL.md names no scripts, command-line tools or credentials: Nextjs Optimization is instructions for the agent only.
Does Nextjs Optimization 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 Optimization 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 Optimization use?
Nextjs Optimization 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 Optimization use?
About 533 tokens (SKILL.md is roughly 2.1k 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 219 tokens, read only when the agent opens those files.
What are the alternatives to Nextjs Optimization?
Skills that share tags, products or a category with Nextjs Optimization: Core Web Vitals (vmDeshpande/ai-agent-automation, 178 stars), React Best Practices (ryokun6/ryos, 1.3k stars), Senior Frontend (alirezarezvani/claude-skills, 28k stars) and Next.js Developer (Jeffallan/claude-skills, 12k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Nextjs Optimization?
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.