System Tracing on the phone only records an app's own trace sections when the app is debuggable or profileable, and the phone runs a build that is neither once release builds exist. profileable shell="true" admits shell profilers and nothing else. runtime-tracing names composables inside those sections and is inert until a trace is recording. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>