Guide · Agent skill
How to use the Content Without CSS Check agent skill
Updated · written with AI from the project's own documentation and checked against our catalogue data
The content-without-css skill is a set of instructions that teaches an AI agent to review web markup and check whether its meaning depends on styling. It is for front-end developers, designers and QA testers who want to confirm that headings, labels, error messages and key tasks still work when CSS is missing or replaced. After this guide you will know how to install the skill, trigger it with plain requests and read what it returns.
Content Without CSS Checkthedaviddias/Front-End-Checklist · MIT Download the skill Quick start
- 1Download the ZIP. Get the content-without-css ZIP file from the skill page.
- 2Unzip into a skills folder. Extract it into ~/.claude/skills/ for all projects, or into a project's .claude/skills/ folder for one project.
- 3Or upload in the Claude apps. In the Claude apps, go to Settings → Capabilities → Skills and upload the ZIP.
- 4Describe your review. Ask in plain language to check a page, form or component for content that depends on CSS.
- 5Provide the markup. Share the rendered HTML or component source so the agent can check DOM order and labels.
- 6Apply and verify fixes. Make the suggested semantic HTML changes, then test the key journey with author styles disabled.
What the skill makes the agent do
Agent skills are folders of instructions that an AI assistant loads when a task matches them. When this skill is installed, the agent reviews rendered HTML, layout components and design-system patterns for places where meaning depends on presentation.
It checks the DOM order against the reading and task-completion order, looks at semantic structure such as headings and lists, and confirms that form labels and error messages are tied to their fields. It also looks for essential text hidden in CSS generated content. The skill then suggests semantic HTML fixes and ways to test key pages with styles turned off.
Install the skill
You can install the skill in one of two ways. Download the ZIP file from the skill page and unzip it into ~/.claude/skills/ to make it available across your projects, or into a project's .claude/skills/ folder to limit it to that project.
If you use the Claude apps, you can instead upload the ZIP under Settings → Capabilities → Skills.
- Personal install: unzip into ~/.claude/skills/
- Project install: unzip into .claude/skills/ inside your project
- Claude apps: Settings → Capabilities → Skills, then upload the ZIP
Trigger the skill with natural requests
You do not need a special command. Describe the review you want in plain language, and mention the markup, component or page involved. The skill's description covers reviewing rendered HTML, layout components and design-system patterns, so requests about those are the best matches.
- Check whether this checkout form still makes sense without CSS.
- Review this card component's markup for reading order problems when styles are off.
- Does our design system's tab pattern depend on visual cues to convey meaning?
- Look at this template and tell me if the error messages are tied to their fields.
Examples of what a review finds
A common problem is a step indicator that uses CSS to reorder items. In the source's bad example, a checkout grid places the summary step first in the HTML and relies on layout to show it as step 3. With styles removed, the reading order no longer matches the task.
Another is a form that uses a placeholder as the only label. The skill's fix direction is to keep a real label element in the markup so the field's purpose survives when styling changes.
What the skill needs and how it runs
The skill lists no required tools or dependencies. It does not run scripts and does not use the network. Its files are SKILL.md, which holds the workflow, and references/rule.md, which holds the full rule with code examples. Because it only reads and reasons about the markup you give it, you should still check its suggestions against your own pages.
- Requires: nothing listed
- Runs scripts: no
- Uses network: no
Tips for better results
Give the agent the rendered HTML or the component source, not only a screenshot, so it can check DOM order and labels. Say which journey matters most, such as signing up or paying, so the review focuses on it. Ask the agent to explain how to verify each fix with author styles disabled in your browser.
- Paste the markup for one page or component at a time.
- Name the primary task so the review checks that task end to end.
- Ask for the verification steps alongside the fixes.
What people use it for
- Reviewing a checkout or sign-up form to confirm labels and error messages stay attached to their fields.
- Checking a design-system card or tab component for reading order that depends on CSS layout.
- Auditing a template to find step indicators or instructions that only work visually.
- Helping QA testers plan a run-through of key pages with styles turned off.
Frequently asked questions
How do I install the content-without-css skill?
Download the ZIP from the skill page and unzip it into ~/.claude/skills/ for personal use, or into a project's .claude/skills/ folder. In the Claude apps, you can upload the ZIP under Settings → Capabilities → Skills instead.
Does the content-without-css skill require anything else?
The skill lists no required dependencies. It does not run scripts and does not use the network, according to its listing.
Is this skill free to use?
The source project is published under the MIT licence. Check the repository licence file for the full terms before you reuse the material.
Can this skill replace a full accessibility audit?
No. It covers one checklist rule about content remaining usable without CSS and does not test with assistive technology. Use it alongside other accessibility checks.
Which pages should I not use this skill on?
Skip pages whose only purpose is visual, such as decorative graphics, where removing CSS is not meaningful for the review.
What is an alternative if this skill does not fit my needs?
For a broader check, use a full accessibility audit process that includes assistive technology testing. The source does not compare this skill with specific alternatives, so evaluate them against your own requirements.
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Our verdict
Use this skill if you are a front-end developer, designer or QA tester who wants a focused review of whether markup, labels and task flow survive without CSS. Pick something else if you need a complete accessibility audit or testing with screen readers, or if your pages are purely decorative.
Download the skill