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AB-046
Structured 404 Errors
What it means
Your site returns structured JSON for 404 errors instead of plain HTML.
Why it matters
When agents hit a missing page, a structured error tells them what went wrong. An HTML 404 page is useless to machines.
✗
What's wrong
404 returns an HTML page. Agents can't parse the error.
✓
What's right
404 returns structured JSON with error details agents can understand.
Check this rule on your site
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