🎯
AB-019
Preferred Format Selection
🔄 Content Negotiation
Pillar: Discovery
Moderate effort
Severity: low
Est. cost: $10-50
Gap: documentation
Fix: deterministic
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.
Evidence expected
This rule is verified by:
http Source: Runtime probe
✗
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.
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Related rules in Content Negotiation
Machine-Readable
This rule is also available as JSON: /rules/AB-019.json
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