Evaluating Apple Intelligence Features in Xcode

Traditional unit tests assume deterministic output. AI is non‑deterministic. This breaks everything.

Apple's solution: Evaluations framework (Xcode 27).

What's covered:

• Why #expect(result == expected) fails for AI features
• The cost of shipping untested AI
• Evaluations framework components: dataset, subject, evaluators
• Measuring quality across multiple runs
• Moving from exact matches to quality scoring

Why it matters: Without evaluation, AI features are shipped blind. This framework gives you objective measurement.