React Doctor
makeplane/plane
Scans React code for lint, accessibility, bundle size and architecture issues, reports a health score and checks that changes do not lower it.
Diagnose measured runtime and Core Web Vitals. An agent skill from TheGoat395/Codex-Skills.
Install Performance Audit Websites
$ npx skills add TheGoat395/Codex-Skills --skill performance-audit-websites -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install TheGoat395/Codex-Skills performance-audit-websites --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/TheGoat395/Codex-Skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/performance-audit-websites .claude/skills/performance-audit-websites && 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 "performance-audit-websites" agent skill from https://github.com/TheGoat395/Codex-Skills/tree/main/skills/performance-audit-websites into .claude/skills/performance-audit-websites/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "performance-audit-websites", 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/TheGoat395/Codex-Skills/tree/main/skills/performance-audit-websitesType 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 TheGoat395/Codex-Skills --skill performance-audit-websites -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install TheGoat395/Codex-Skills performance-audit-websites --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/TheGoat395/Codex-Skills.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/performance-audit-websites .agents/skills/performance-audit-websites && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "performance-audit-websites" agent skill from https://github.com/TheGoat395/Codex-Skills/tree/main/skills/performance-audit-websites into .agents/skills/performance-audit-websites/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "performance-audit-websites", 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 TheGoat395/Codex-Skills --skill performance-audit-websites -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install TheGoat395/Codex-Skills performance-audit-websites --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/TheGoat395/Codex-Skills.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/performance-audit-websites .cursor/skills/performance-audit-websites && 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 "performance-audit-websites" agent skill from https://github.com/TheGoat395/Codex-Skills/tree/main/skills/performance-audit-websites into .cursor/skills/performance-audit-websites/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "performance-audit-websites", 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/TheGoat395/Codex-Skills.git --path skills/performance-audit-websites--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 TheGoat395/Codex-Skills --skill performance-audit-websites -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install TheGoat395/Codex-Skills performance-audit-websites --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/TheGoat395/Codex-Skills.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/performance-audit-websites .gemini/skills/performance-audit-websites && 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 "performance-audit-websites" agent skill from https://github.com/TheGoat395/Codex-Skills/tree/main/skills/performance-audit-websites into .gemini/skills/performance-audit-websites/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "performance-audit-websites", 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 TheGoat395/Codex-Skills performance-audit-websitesInstalls 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 TheGoat395/Codex-Skills --skill performance-audit-websites -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/TheGoat395/Codex-Skills.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/performance-audit-websites .github/skills/performance-audit-websites && 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 "performance-audit-websites" agent skill from https://github.com/TheGoat395/Codex-Skills/tree/main/skills/performance-audit-websites into .github/skills/performance-audit-websites/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "performance-audit-websites", 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 TheGoat395/Codex-Skills --skill performance-audit-websites -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install TheGoat395/Codex-Skills performance-audit-websites --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/TheGoat395/Codex-Skills.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/performance-audit-websites .opencode/skills/performance-audit-websites && 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 "performance-audit-websites" agent skill from https://github.com/TheGoat395/Codex-Skills/tree/main/skills/performance-audit-websites into .opencode/skills/performance-audit-websites/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "performance-audit-websites", 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
performance-audit-websites- GitHub stars
- 126
- Token cost
- ~441 tokens
- SKILL.md length
- 207 words
- Files
- 4 (incl. references)
- Skills in repo
- 23
- Repo updated
- First seen
- Licence
- MIT
At a glance
Diagnose measured runtime and Core Web Vitals. An agent skill from TheGoat395/Codex-Skills.
- Works in 5 steps: Inspect the affected surface, relevant… → Read Performance Audit Websites Guide… → Record a reproducible baseline and… → …
- Tasks that involve Web performance
- SKILL.md covers Workflow and Scoped execution
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Performance Audit Websites is an agent skill from TheGoat395/Codex-Skills. Diagnose measured runtime and Core Web Vitals.
Its SKILL.md is about 440 tokens, which your agent loads only when the skill is triggered. The skill folder holds 5 other files, including reference files (for example `agents/openai.yaml`, `references/performance-audit-websites-guide.md` and `references/react-next-performance.md`).
It sits in Frontend & Design, covering Web performance. It works with React. The repository describes itself as: Codex-first Agent Skills library for premium frontend, website, motion, accessibility, QA, and handoff workflows. The licence is MIT.
When your agent uses it
- Tasks that involve Web performance
Example prompts
- “/performance-audit-websites”
Workflow steps
5 steps, taken from the first numbered list in SKILL.md.
- Inspect the affected surface, relevant project scripts, target URL and available inspection tooling; reuse existing context.
- Read Performance Audit Websites Guide before claiming the site is ready. For React or Next.js implementation work, also read React and…
- Record a reproducible baseline and identify the dominant request, rendering, interaction or layout-shift cost. When optimization is…
- Fix issues when they are in scope; otherwise record exact evidence and remaining risk.
- Summarize commands, URLs, screenshots/checks, changed files, and what was not tested.
What it can do on your machine
Read from SKILL.md and the folder at commit feff772. 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
Performance Audit Websites loads about 441 tokens when it runs, and up to ~2.2k if it reads all its reference files. Until then it costs about 18 tokens; SKILL.md has 207 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 TheGoat395/Codex-Skills at commit feff772, republished under its MIT licence (© TheGoat395). 207 words, ~441 tokens.
Download SKILL.mdSave it as
.claude/skills/performance-audit-websites/SKILL.md (or your agent's skills folder). This skill also uses 3 other files; get the full folder from GitHub.- name
- performance-audit-websites
- description
- Diagnose measured runtime and Core Web Vitals.
Performance Audit Websites
Use this skill to keep premium sites fast enough that visual ambition does not punish users. Measure first and optimize the dominant constraint; do not apply framework folklore as proof.
Own measured diagnosis and implementation. Route pre-build numeric budgets, acceptance thresholds, and visual-richness policy to $performance-budget-lab.
Workflow
- Inspect the affected surface, relevant project scripts, target URL and available inspection tooling; reuse existing context.
- Read Performance Audit Websites Guide before claiming the site is ready. For React or Next.js implementation work, also read React and Next.js performance.
- Record a reproducible baseline and identify the dominant request, rendering, interaction or layout-shift cost. When optimization is authorized, change the measured bottleneck and compare under matched build/device/cache conditions.
- Fix issues when they are in scope; otherwise record exact evidence and remaining risk.
- Summarize commands, URLs, screenshots/checks, changed files, and what was not tested.
Separate field data, controlled lab data, source inspection, and inference. A Lighthouse score from one machine is not a field-performance guarantee; an optimized source pattern is not a measured user improvement.
Scoped execution
Apply the shared web contract once when execution crosses phases; reuse it if already read. Load only the specialist guidance relevant to the requested surface and deliverable.
© TheGoat395, 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/performance-audit-websites of TheGoat395/Codex-Skills.
- SKILL.md
- agents/openai.yaml
- references/performance-audit-websites-guide.md
- references/react-next-performance.md
Open the folder on GitHubat commit feff772
Compare with similar skills
Performance Audit Websites 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 |
|---|---|---|---|---|---|---|
| Performance Audit Websites this skillTheGoat395/Codex-Skills | 126 | — | ~441 | Automated safety check: Pass | MIT | |
| React Doctormakeplane/plane | 61k | 12 repos | ~657 | Automated safety check: Pass | AGPL-3.0 | |
| React Frontend Development Guidelinesdiet103/claude-code-infrastructure-showcase | 10k | 2 repos | ~2.9k | Automated safety check: Pass | MIT | |
| Core Web VitalsvmDeshpande/ai-agent-automation | 178 | 4 repos | ~3.6k | Automated safety check: Pass | MIT | |
| Reduce Bundle Sizekcsujeet/ilamy-calendar | 351 | — | ~2.9k | Automated safety check: Pass | MIT | |
| Shader for Interfacesv2space-labs/shader-for-interfaces | 116 | — | ~3.1k | Automated safety check: Pass | MIT |
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Core Web Vitals
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Related
Works with
Categories
Questions about Performance Audit Websites
What does Performance Audit Websites do?
Diagnose measured runtime and Core Web Vitals. An agent skill from TheGoat395/Codex-Skills. Performance Audit Websites is an agent skill from TheGoat395/Codex-Skills. Diagnose measured runtime and Core Web Vitals.
When should I use Performance Audit Websites?
Performance Audit Websites fits situations like: tasks that involve Web performance.
How do I install Performance Audit Websites in Claude Code?
Run `npx skills add TheGoat395/Codex-Skills --skill performance-audit-websites -a claude-code`. Or copy the skill folder (skills/performance-audit-websites in TheGoat395/Codex-Skills) into .claude/skills/performance-audit-websites in your project. Claude Code loads it when a task matches its description.
How do I install Performance Audit Websites in Codex?
Run `npx skills add TheGoat395/Codex-Skills --skill performance-audit-websites -a codex`. Or copy the skill folder (skills/performance-audit-websites in TheGoat395/Codex-Skills) into .agents/skills/performance-audit-websites in your project. Codex loads it when a task matches its description.
Can I use Performance Audit Websites 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 TheGoat395/Codex-Skills --skill performance-audit-websites -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/performance-audit-websites, .gemini/skills/performance-audit-websites, .github/skills/performance-audit-websites and .opencode/skills/performance-audit-websites in your project.
What does Performance Audit Websites need to run?
SKILL.md names no scripts, command-line tools or credentials: Performance Audit Websites is instructions for the agent only.
Does Performance Audit Websites 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 Performance Audit Websites 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 Performance Audit Websites use?
Performance Audit Websites 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 Performance Audit Websites use?
About 441 tokens (SKILL.md is roughly 1.8k 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 1.8k tokens, read only when the agent opens those files.
What are the alternatives to Performance Audit Websites?
Skills that share tags, products or a category with Performance Audit Websites: React Doctor (makeplane/plane, 61k stars), React Frontend Development Guidelines (diet103/claude-code-infrastructure-showcase, 10k stars), Core Web Vitals (vmDeshpande/ai-agent-automation, 178 stars) and Reduce Bundle Size (kcsujeet/ilamy-calendar, 351 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Performance Audit Websites?
TheGoat395 (a GitHub user) maintains it in TheGoat395/Codex-Skills, which has 126 GitHub stars. The repository holds 23 skills in this directory. The repository was last updated on September 11, 2026.
Source: TheGoat395/Codex-Skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.