native-app-performance

Quick Review

Excellent skill for CLI-based profiling of native macOS/iOS apps. The description clearly covers when to invoke (profiling, analyzing traces, finding hotspots). Task knowledge is comprehensive with concrete xctrace commands, extraction steps, symbolication workflow, and critical details like ASLR handling. Structure is clean with quick-start examples, workflow notes, and gotchas. High novelty: a CLI agent would struggle to orchestrate xctrace recording, XML extraction, vmmap load address lookup, and atos symbolication without this guidance—this workflow saves many tokens and trial-and-error. Minor room for improvement: could explicitly mention iOS device/simulator differences or error recovery patterns, but referenced scripts likely handle those details.