Guide · Agent skill
How to use the Required ARIA Attributes Checker agent skill
Updated · written with AI from the project's own documentation and checked against our catalogue data
The aria-required-attr skill is a set of instructions that teaches an AI agent to review rendered HTML and interactive components for ARIA roles that are missing attributes the WAI-ARIA specification requires. It is aimed at front-end developers, designers and QA reviewers who want to check components before release. After this guide you will know what the skill does, how to install it, how to ask for a review in plain language, and what its limits are.
Required ARIA Attributes Checkerthedaviddias/Front-End-Checklist · MIT Download the skill Quick start
- 1Download the ZIP. Get the aria-required-attr skill as a ZIP from the skill's page on the directory.
- 2Unzip into a skills folder. Extract it into ~/.claude/skills/ for personal use, or into .claude/skills/ in a project.
- 3Or upload in the Claude apps. Go to Settings → Capabilities → Skills and upload the ZIP there.
- 4Make a plain request. Ask the agent to review a component or rendered HTML for required ARIA attributes.
- 5Provide the markup. Paste the rendered HTML or point the agent at the component file.
- 6Apply and verify fixes. Add the missing attributes the agent suggests, then check them with browser accessibility tooling or assistive technology.
What is an agent skill and what does this one do?
An agent skill is a folder containing a SKILL.md file and any supporting reference files. When a request matches the skill's description, the AI agent loads those instructions and follows them for the task. This skill covers one accessibility rule: required ARIA attributes for roles.
ARIA attributes are labels that tell screen readers what an element is and what state it is in. For example, a slider needs a current value, such as aria-valuenow, so a screen reader user can hear it. The skill makes the agent check native HTML semantics first, then flag missing required attributes and suggest fixes. Where relevant, it can also look at keyboard behaviour, focus flow and accessible names.
- Identify roles that require specific state or property attributes
- Check that attributes such as aria-valuenow for sliders are present
- Flag exact elements, roles, labels, focus behaviour or keyboard interactions that violate the rule
- Note how to verify the fix with browser accessibility tooling or assistive technology
How do you install the skill?
Download the skill as a ZIP from the skill's page on the directory. Unzip it into your personal skills folder at ~/.claude/skills/, or into a project's .claude/skills/ folder if you want it available only for that project. After unzipping, the skill folder should contain SKILL.md and the references folder.
If you use the Claude apps instead, open Settings, go to Capabilities and upload the skill under 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
How do you trigger the skill with a natural request?
You do not need a special command. Describe the task in plain language and mention the code or component you want reviewed. The skill's description covers reviewing rendered HTML, interactive components and design-system patterns for required ARIA attributes, so requests that mention those topics are the most likely to load it.
Be specific about what you are giving the agent. Pasting the rendered markup, or pointing it at the component file, gives it something concrete to check.
- "Check this slider component for required ARIA attributes."
- "Review this custom dropdown markup for missing ARIA attributes on its roles."
- "Audit our design-system tabs pattern against the WAI-ARIA required attributes."
What does a good review look like?
The skill asks the agent to check whether native HTML already solves the problem before adding ARIA, because a native element often needs no ARIA at all. For a role that is missing a required attribute, a good answer names the element, the role, the missing attribute and a concrete fix. The reference material gives a correct slider example that includes role, aria-valuenow, aria-valuemin, aria-valuemax and aria-label.
The reference also shows a scrollbar example that uses aria-controls, aria-orientation, aria-valuenow, aria-valuemin and aria-valuemax.
<div role="slider"
aria-valuenow="50"
aria-valuemin="0"
aria-valuemax="100"
aria-label="Volume level">
</div>What do you need before you start?
The skill lists no required tools or dependencies. It does not run scripts and does not use the network. You need an agent that can load skills and read the code you want reviewed.
To verify fixes, the skill points you to browser accessibility tooling and assistive technology. Those are separate from the skill and are not included in it.
- No listed requirements
- Runs scripts: no
- Uses network: no
What are the safety notes and limits?
Because the skill runs no scripts and makes no network calls, it only shapes how the agent reads and comments on your code. It covers one rule. It is not a full accessibility audit and does not replace testing with real assistive technology or a professional audit. For sites that do not use custom ARIA roles, the rule rarely applies, and native HTML is usually the better fix.
- Do not treat a clean review as proof that a component is accessible
- Test with real screen readers and keyboard navigation before release
- Prefer native elements where they meet the need
What tips help you get better results?
Give the agent the rendered markup, not only the source template, so it sees the final roles and attributes. Ask it to check keyboard behaviour, focus flow and accessible names too, if those matter for the component. Ask for exact fixes and then verify them yourself in browser tooling.
- Paste rendered HTML, including state changes such as after a value updates
- Ask for native-HTML alternatives first
- Name the component type, for example slider, scrollbar or tabs
- Re-run the review after applying fixes
What people use it for
- Checking a custom slider for aria-valuenow, aria-valuemin and aria-valuemax before release
- Reviewing a design-system tabs or dropdown pattern against WAI-ARIA required attributes
- Giving a QA reviewer a structured list of missing attributes with element names
- Working through the accessibility items in the Front-End Checklist
Frequently asked questions
How do I install the aria-required-attr skill?
Download the ZIP from the skill's page and unzip it into ~/.claude/skills/ for personal use, or into .claude/skills/ inside a project. In the Claude apps, you can upload the ZIP under Settings → Capabilities → Skills.
Is the aria-required-attr skill free?
The skill is published under the MIT licence. Check the repository for the licence text before reusing it in your own project.
What does required ARIA attributes mean?
Some ARIA roles need certain state or property attributes to work properly. For example, a slider needs aria-valuenow so screen readers can announce its current value. Without them, assistive technology cannot communicate the element's state correctly.
Does this skill need any tools or internet access?
The skill lists no requirements, runs no scripts and does not use the network. It only guides the agent through reviewing the code you give it.
Can this skill replace a full accessibility audit?
No. It covers one rule. It does not replace testing with real assistive technology or a professional audit, so use it as one check among several.
When should I not use this skill?
Skip it for sites that do not use custom ARIA roles, since the rule rarely applies there. Native HTML is usually the better fix in those cases.
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Our verdict
This skill suits front-end developers, designers and QA reviewers who build or review custom components with ARIA roles and want a focused check for missing required attributes. It is a narrow tool, so pick it for that job and use a full audit or real assistive technology testing for everything else. If your site relies mainly on native HTML elements, you will likely get more value from fixing those directly.
Download the skill