CharlesWiltgen

Use when adding debug-only deep links for testing, enabling simulator navigation to specific screens, or integrating with automated…

Use when making design decisions, implementing HIG patterns, Liquid Glass, SF Symbols, typography, or structuring app entry points and…

Use when app runs at unexpected frame rate, stuck at 60fps on ProMotion, frame pacing issues, or configuring render loops.

Use when the user mentions battery drain, energy optimization, power consumption audit, or pre-release energy check.

Symptom-based energy troubleshooting - decision trees for 'app at top of battery settings', 'phone gets hot', 'background drain', 'high…

Use when app drains battery, device gets hot, users report energy issues, or auditing power consumption - systematic Power Profiler…

Complete energy optimization API reference - Power Profiler workflows, timer/network/location/background APIs, iOS 26…

Use when implementing widgets, Live Activities, Control Center controls, or app extensions - comprehensive API reference for WidgetKit…

Use when implementing widgets, Live Activities, or Control Center controls - enforces correct patterns for timeline management, data…

Use when the user mentions Foundation Models review, on-device AI audit, LanguageModelSession issues, @Generable checking, or Apple…

Use when debugging Foundation Models issues — context exceeded, guardrail violations, slow generation, availability problems, unsupported…

Reference — Complete Foundation Models framework guide covering LanguageModelSession, @Generable, @Guide, Tool protocol, streaming…