Monday, November 2, 2026

AI Output Schema Bypass Lab: Valid JSON, Impossible Values

ApprovalBot reviews expense reports and returns a JSON verdict the backend validates against a schema: right types, required fields present. But a schema checks shape, not sense — so a verdict approving a $1,000,000 expense is perfectly valid JSON, and perfectly against policy. Lab at a glance: Advanced · 145 XP · about 20 minutes · runs in your browser, no signup or setup. Try it yourself first; the full solution is behind a spoiler below. [se_lab_cta id="ai-output-schema-bypass-1"] 📋 In…

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