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.

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