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Use when reviewing rendered HTML, interactive components, or design-system patterns related to Use only allowed ARIA attributes for each role. Check native semantics first, then inspect keyboard behavior, focus flow, accessible names, and screen-reader output where relevant.
Passed 4 of 22 test cases with the skill, and 18 of 22 without it.
1 fixed16 passed either way1 still failing4 broke
Tokens, turns and time describe resource use, not a dollar price.
This benchmark measured an earlier version of the skill.
A test case the skill fixed. Same model, same prompt, with and without the skill.
Check <button role="tab" aria-selected="true" aria-valuenow="1">Tab 1</button>. Does role tab support aria-valuenow?
| Checked | Without skill | With skill |
|---|---|---|
| The response identifies aria-valuenow as invalid for role tab | Passed | Passed |
| The response confirms aria-selected is valid for role tab | Missed | Passed |
The instructions your model reads when the skill loads.
Invalid ARIA attributes are ignored by screen readers or may cause them to misinterpret the element's purpose, leading to a broken experience for users with disabilities.
Verify that all ARIA attributes used on elements are valid for their assigned WAI-ARIA roles.
Remove or correct ARIA attributes that are not supported by the element's current ARIA role.
Explain why using only role-supported ARIA attributes is necessary for proper screen reader communication.
Review the rendered markup and interactive states that affect Use only allowed ARIA attributes for each role. Flag exact elements, roles, labels, focus behavior, or keyboard interactions that violate the rule, and note how to verify the fix with browser accessibility tooling or assistive tech.
For full implementation details, code examples, and framework-specific guidance,
see references/rule.md.
Rule page: https://frontendchecklist.io/rules/accessibility/aria-allowed-attr
test cases passed, vs 18 / 22 without
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