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Text Compression Auditor

Audits pages for missing Gzip/Brotli compression on HTML, JS and CSS and recommends fixes.

Source Download skill
Repository
thedaviddias/Front-End-Checklist
Stars
74,632
Licence
MIT
Files
2 files

What it does

Once installed, the agent reviews a website's loading performance with a focus on whether text files like HTML, JavaScript and CSS are sent compressed. It checks for Content-Encoding headers showing gzip or br, and suggests enabling compression in a web server such as Nginx or Apache, or in a CDN. It is instructed to confirm the real bottleneck with DevTools, Lighthouse or field data before recommending changes.

Great for

  • Front-end developers checking why a page loads slowly on mobile
  • Site owners reviewing hosting or CDN settings for performance
  • Teams running a performance audit against a front-end checklist

Skip it if

  • Sites where the main problem is large bundles or rendering, since the skill notes compression does not fix parse and execution cost (the agent may still need other tools)
  • Images, video and other binary files, which the skill does not address
  • Anyone expecting it to change server settings itself; it only advises unless the user applies the fix

Try asking

  • “Audit my site's HTML, JS and CSS headers and tell me if Brotli or Gzip is missing.”
  • “Why is my page slow on 3G? Check whether text assets are compressed.”
  • “Explain how to enable Brotli in Nginx for my static site.”
  • “Review my CDN configuration for text compression and flag any files served uncompressed.”
Step-by-step guide: how to use Text Compression AuditorInstall, first run, examples, tips and FAQs

Install in 3 steps

  1. 1

    Download the skill

    The ZIP contains the 2 original files, the MIT licence and an attribution note.

    compression.zip
  2. 2

    Add it to your agent

    Claude Code (all projects)

    mkdir -p ~/.claude/skills && unzip compression.zip -d ~/.claude/skills/

    Claude Code / Agent SDK (this project only)

    mkdir -p .claude/skills && unzip compression.zip -d .claude/skills/

    Claude apps (web/desktop): Settings → Capabilities → Skills → Upload skill, and choose the ZIP.

  3. 3

    Ask for the task

    No special command needed — the agent reads the skill's description and loads it when your request matches. Try one of the prompts above.

Get better results

  • Give the agent the URL or response headers so it can check Content-Encoding directly rather than guessing.
  • Ask for measurements from DevTools or Lighthouse alongside the recommendation to confirm the bottleneck.
  • Point it to your server type (Nginx, Apache, CDN) so the fix steps match your setup.

What's inside

  • references/rule.md
  • SKILL.md

Redistributed unmodified from thedaviddias/Front-End-Checklist under the MIT licence. The assessment was drafted with AI from the skill's files on 2026-10-29. Skills can instruct your agent to run code — read SKILL.md and any scripts before installing.