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AB-019
Preferred Format Selection
What it means
Your site respects format preferences when agents specify what they want.
Why it matters
When an agent says 'I prefer JSON over HTML', your site should honor that preference.
✗
What's wrong
Format preferences are ignored. Agents get whatever the server decides.
✓
What's right
Format preferences are respected, so agents get exactly what they asked for.
Check this rule on your site
Enter your URL to check just this one rule (AB-001).