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EDGE FDE

Beginner

Version prompts like product copy

Roll back a bad prompt in minutes instead of hunting through app builds.

Version prompts like product copy, then route and roll them back with Dynamic Profiles and Dynamic Instructions.

Store versions, point a Dynamic Profile at the live one, and roll back without a new app build. iOS 27 and macOS 27 only.

Lessons

  1. Prompts are product copy
  2. Store versions, not view strings
  3. Route versions with Dynamic Profiles
  4. A/B route and roll back
  5. Ship a registry the team can edit

Key concepts

Takeaways

Agent briefs

Related courses

Test AI behavior before you ship · Stream tokens and measure speed · Trace every step of an AI call · Core AI vs Core ML vs MLX

Official references

Foundation Models · WWDC26 242 Dynamic Profiles · foundation-models-utilities