Use secure and up-to-date JS libraries
SkillMediajs-libraries is an agent skill for auditing slow page loads, heavy assets, and rendering delays tied to JavaScript libraries. It guides the agent to check dependencies for known vulnerabilities and outdated versions, verify the actual bottleneck in DevTools, Lighthouse, or field data, and then recommend updates or lightweight replacements before any changes are made.
Available today. Use it from your connected AI after setup.
No other account needed.
Have a project with JavaScript dependencies to audit.
Then ask your AI: use the Use secure and up-to-date JS libraries skill
What your AI can do with it
- Check JavaScript dependencies for known vulnerabilities and outdated versions
- Verify the actual bottleneck in DevTools, Lighthouse, or field data
- Replace heavy libraries with lightweight alternatives (e.g., date-fns vs moment)
- Ensure libraries are properly versioned and served via reliable CDNs or self-hosted
- Flag exact files, requests, or rendering steps that add unnecessary network, CPU, or layou
- Explain the risks of outdated libraries and the benefits of lightweight alternatives
Getting started
- Have a project with JavaScript dependencies to audit.
- Add the js-libraries skill to the agent's available skills.
- Ask the agent to audit slow page loads, heavy assets, or rendering delays related to JS libraries.
- Provide access to DevTools, Lighthouse, or field data so the agent can verify the bottleneck before recommending changes.
What this skill tells your AI
The instructions your AI receives, as published by thedaviddias/front-end-checklist in skills/js-libraries/SKILL.md and read by ahel’s review.
Outdated or vulnerable libraries pose security risks and often include unnecessary bloat that degrades performance.
Quick Reference
- Regularly audit dependencies for known security vulnerabilities
- Replace heavy libraries with lightweight alternatives (e.g., date-fns vs moment)
- Ensure libraries are properly versioned and served via reliable CDNs or self-hosted
Check
Check the project's JavaScript dependencies for known vulnerabilities and outdated versions.
Fix
Update vulnerable libraries to secure versions and replace bloated dependencies with modern, lightweight alternatives.
Explain
Explain the risks of using outdated JavaScript libraries and the benefits of using lightweight alternatives.
Code Review
Review the routes, assets, and loading behavior that affect Use secure and up-to-date JS libraries. 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/en/rules/performance/js-libraries
Signals
- GitHub stars
- 74k
- Forks
- 7k
- Last commit
- Aug 2026
Questions
- What does the skill check?
- It checks the project's JavaScript dependencies for known vulnerabilities and outdated versions, and reviews routes, assets, and loading behavior that affect performance.
- How does it verify a bottleneck?
- It uses DevTools, Lighthouse, or field data to confirm the actual bottleneck before recommending any changes.
- What fixes does it recommend?
- Updating vulnerable libraries to secure versions and replacing bloated dependencies with modern, lightweight alternatives such as date-fns instead of moment.
Advanced
- Item type
- skill
- Key
js-libraries- Source
- github.com/thedaviddias/front-end-checklist