New: 97,000+ 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

Third Party Scripts

by thedaviddias in thedaviddias/Front-End-Checklist

A skill your agent uses when auditing slow page loads, heavy assets, or rendering delays related to Optimize third-party script loading.

MITAuto-check passedFrontend & Design

Install Third Party Scripts

skills CLI
$ npx skills add thedaviddias/Front-End-Checklist --skill third-party-scripts -a claude-code

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

GitHub CLI
$ gh skill install thedaviddias/Front-End-Checklist third-party-scripts --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/thedaviddias/Front-End-Checklist.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/third-party-scripts .claude/skills/third-party-scripts && 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
third-party-scripts
GitHub stars
74k
Token cost
~417 tokens
SKILL.md length
151 words
Files
2 (incl. references)
Skills in repo
390
Repo updated
First seen
Licence
MIT

At a glance

A skill your agent uses when auditing slow page loads, heavy assets, or rendering delays related to Optimize third-party script loading.

  • Auditing slow page loads
  • SKILL.md covers Quick Reference, Check, Fix and Explain, plus 1 more section
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
  • Rendering delays related to Optimize third-party script loading

What it does

Third Party Scripts is an agent skill from thedaviddias/Front-End-Checklist. Use when auditing slow page loads, heavy assets, or rendering delays related to Optimize third-party script loading. Verify the actual bottleneck in DevTools, Lighthouse, or field data before recommending changes.

Its SKILL.md is about 420 tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files, including reference files (for example `references/rule.md`).

It sits in Frontend & Design, covering Web performance. The repository describes itself as: 🗂 The essential checklist for modern web development, for humans and AI agents. The licence is MIT.

When your agent uses it

  • Auditing slow page loads
  • Rendering delays related to Optimize third-party script loading

Example prompts

  • “/third-party-scripts”

What it can do on your machine

Read from SKILL.md and the folder at commit e8d14d0. 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

    Links to these hosts (documentation or services it may open):

    • frontendchecklist.io

    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

Third Party Scripts loads about 417 tokens when it runs, and up to ~2k if it reads all its reference files. Until then it costs about 58 tokens; SKILL.md has 151 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~58
When it runs · the whole SKILL.md, loaded when a task matches
~417
With references · SKILL.md plus every file in references/, read only if the agent opens them
~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 thedaviddias/Front-End-Checklist at commit e8d14d0, republished under its MIT licence (© thedaviddias). 151 words, ~417 tokens.

Download SKILL.mdSave it as .claude/skills/third-party-scripts/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.
name
third-party-scripts
description
Use when auditing slow page loads, heavy assets, or rendering delays related to Optimize third-party script loading. Verify the actual bottleneck in DevTools, Lighthouse, or field data before recommending changes.
metadata.category
performance
metadata.priority
high
metadata.difficulty
intermediate
metadata.estimatedTime
20
metadata.source
frontendchecklist.io
metadata.url
https://frontendchecklist.io/rules/performance/third-party-scripts

Optimize third-party script loading

Third-party scripts are the #1 cause of slow websites—unoptimized loading can add 2-5 seconds to your page load time.

Quick Reference

  • Use async for independent scripts (analytics, ads)
  • Use defer for DOM-dependent scripts (chat widgets, social)
  • Lazy-load non-critical scripts after page load
  • Consider self-hosting critical third-party scripts

Check

Analyze third-party scripts on this page to ensure they use async/defer and don't block rendering.

Fix

Add async or defer attributes to third-party scripts and consider lazy loading non-critical scripts.

Explain

Explain the performance impact of third-party scripts and strategies to minimize their blocking effect.

Code Review

Review the routes, assets, and loading behavior that affect Optimize third-party script loading. Flag exact files, requests, or rendering steps that add unnecessary network, CPU, or layout cost, and describe the measurement method used to confirm the issue.

For full implementation details, code examples, and framework-specific guidance, see references/rule.md.

Rule page: https://frontendchecklist.io/rules/performance/third-party-scripts

© thedaviddias, 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 1 other file (references) in skills/third-party-scripts of thedaviddias/Front-End-Checklist.

  • SKILL.md
  • references/rule.md

Open the folder on GitHubat commit e8d14d0

Compare with similar skills

Third Party Scripts 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.

Third Party Scripts compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Third Party Scripts this skillthedaviddias/Front-End-Checklist74k—~417Automated safety check: PassMIT
React Doctormakeplane/plane60k12 repos~657Automated safety check: PassAGPL-3.0
Fixing Motion Performanceibelick/ui-skills9.4k5 repos~1.4kAutomated safety check: PassMIT
GSAP Performance Tuninggreensock/gsap-skills16k4 repos~1kAutomated safety check: PassMIT
React Frontend Development Guidelinesdiet103/claude-code-infrastructure-showcase10k2 repos~2.9kAutomated safety check: PassMIT
Web Quality Auditaddyosmani/web-quality-skills2.9k—~2.6kAutomated safety check: PassMIT

Similar skills

  • 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.

    60k GitHub starsUsed in 12 repos~657 tokens
    Frontend & DesignAuto-check passed

  • Fixing Motion Performance

    ibelick/ui-skills

    Audits and fixes web animation performance: layout thrashing, work that belongs on the compositor, scroll-linked motion and costly blur effects.

    9.4k GitHub starsUsed in 5 repos~1.4k tokens
    Frontend & DesignAuto-check passed

  • GSAP Performance Tuning

    greensock/gsap-skills

    Guides the agent to keep GSAP animations smooth by animating transforms and opacity, batching DOM reads and writes, and avoiding layout-heavy properties.

    16k GitHub starsUsed in 4 repos~1k tokens
    Frontend & DesignAuto-check passed

  • React Frontend Development Guidelines

    diet103/claude-code-infrastructure-showcase

    Guidelines for React 18 and TypeScript apps covering Suspense data fetching, lazy loading, feature folders, MUI v7 styling, TanStack Router and performance.

    10k GitHub starsUsed in 2 repos~2.9k tokens
    Frontend & DesignAuto-check passed

  • Web Quality Audit

    addyosmani/web-quality-skills

    Run an evidence-led web quality audit covering performance, accessibility, SEO, best practices, and agentic browsing.

    2.9k GitHub stars~2.6k tokensUpdated 1 mo ago
    Frontend & DesignAuto-check passed

  • SEO Google

    AgriciDaniel/codex-seo

    Google SEO APIs: Search Console (Search Analytics, URL Inspection, Sitemaps), PageSpeed Insights v5, CrUX field data with 25-week history, Indexing API v3, and GA4 organic traffic.

    787 GitHub starsUsed in 2 repos~3.4k tokens
    Frontend & DesignAuto-check passed

More from thedaviddias/Front-End-Checklist

All 390 skills in this repo

  • Content Dates Audit

    thedaviddias/Front-End-Checklist

    Audits article and blog pages for visible publish dates, Article JSON-LD with datePublished and dateModified, and Open Graph time tags, then fixes what is missing.

    74k GitHub stars~691 tokensUpdated yesterday
    Auto-check passed

  • FAQPage Schema Markup

    thedaviddias/Front-End-Checklist

    Adds, checks and fixes FAQPage JSON-LD on pages with visible question-and-answer sections so it matches what readers see and can qualify for rich results.

    74k GitHub stars~774 tokensUpdated yesterday
    Auto-check passed

  • Favicon Audit and Setup

    thedaviddias/Front-End-Checklist

    Checks that a site's favicon is linked, reachable and large enough for Google search results, and sets up ICO, SVG and Apple touch icon files when they are missing.

    74k GitHub stars~731 tokensUpdated yesterday
    Auto-check passed

  • Content Freshness Signals

    thedaviddias/Front-End-Checklist

    Audits article pages for freshness signals, covering the Last-Modified header, Article JSON-LD dateModified and a visible last-updated date, and fixes mismatches.

    74k GitHub stars~741 tokensUpdated yesterday
    Auto-check passed

  • Geo Meta Tags Audit

    thedaviddias/Front-End-Checklist

    Audits and fixes geo.region, geo.placename and geo.position meta tags on regional pages, noting where they help (Bing) and where they do not (Google).

    74k GitHub stars~763 tokensUpdated yesterday
    Auto-check passed

  • Improve a Front-End Checklist Rule

    thedaviddias/Front-End-Checklist

    Scores and rewrites a Front-End Checklist rule MDX file against a scored quality rubric, replacing generic stub prompts with specific, actionable ones.

    74k GitHub stars~1.3k tokensUpdated yesterday
    Auto-check passed

Categories

Questions about Third Party Scripts

What does Third Party Scripts do?

A skill your agent uses when auditing slow page loads, heavy assets, or rendering delays related to Optimize third-party script loading. Third Party Scripts is an agent skill from thedaviddias/Front-End-Checklist. Use when auditing slow page loads, heavy assets, or rendering delays related to Optimize third-party script loading.

When should I use Third Party Scripts?

Third Party Scripts fits situations like: auditing slow page loads; rendering delays related to Optimize third-party script loading.

How do I install Third Party Scripts in Claude Code?

Run `npx skills add thedaviddias/Front-End-Checklist --skill third-party-scripts -a claude-code`. Or copy the skill folder (skills/third-party-scripts in thedaviddias/Front-End-Checklist) into .claude/skills/third-party-scripts in your project. Claude Code loads it when a task matches its description.

How do I install Third Party Scripts in Codex?

Run `npx skills add thedaviddias/Front-End-Checklist --skill third-party-scripts -a codex`. Or copy the skill folder (skills/third-party-scripts in thedaviddias/Front-End-Checklist) into .agents/skills/third-party-scripts in your project. Codex loads it when a task matches its description.

Can I use Third Party Scripts 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 thedaviddias/Front-End-Checklist --skill third-party-scripts -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/third-party-scripts, .gemini/skills/third-party-scripts, .github/skills/third-party-scripts and .opencode/skills/third-party-scripts in your project.

What does Third Party Scripts need to run?

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

Does Third Party Scripts access the network?

SKILL.md names 1 domain. As links in the text: frontendchecklist.io. This is read from the text; nothing was executed.

Is Third Party Scripts 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 Third Party Scripts use?

Third Party Scripts 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 Third Party Scripts use?

About 417 tokens (SKILL.md is roughly 1.7k 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 1.5k tokens, read only when the agent opens those files.

What are the alternatives to Third Party Scripts?

Skills that share tags, products or a category with Third Party Scripts: React Doctor (makeplane/plane, 60k stars), Fixing Motion Performance (ibelick/ui-skills, 9.4k stars), GSAP Performance Tuning (greensock/gsap-skills, 16k stars) and React Frontend Development Guidelines (diet103/claude-code-infrastructure-showcase, 10k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Third Party Scripts?

thedaviddias (a GitHub user) maintains it in thedaviddias/Front-End-Checklist, which has 74,388 GitHub stars. The repository holds 390 skills in this directory. The repository was last updated on October 6, 2026.

Source: thedaviddias/Front-End-Checklist on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.