Metrickit
Use when collecting or analyzing production iOS or iPadOS performance telemetry with...
Install
npx skills add dpearson2699/swift-ios-skills --skill metrickit -g -a claude-code -y- Repository
- dpearson2699/swift-ios-skills1.3k
- Category
- Mobile
- Updated
- 3mo ago
- License
- See repository
- Context cost
- Mediumabout 3,000 tokens
- Runs scripts
- No, instructions only
What it does
Use when collecting or analyzing production iOS or iPadOS performance telemetry with MetricKit, including iOS 27 MetricManager async metric or diagnostic reports, hang or crash triage, custom signposts, extended launch measurement, durable export, or iOS 26 MXMetricManager compatibility.
MetricKit
Use MetricKit for low-overhead production telemetry that complements local Instruments and Xcode Organizer analysis. On iOS and iPadOS 27, prefer the Swift-first MetricManager report sequences. Keep MXMetricManager only in an explicit iOS 26 compatibility branch.
Beta-sensitive: The iOS/iPadOS 27 surface below is based on Apple's current beta documentation. It has not been locally compiler-verified because Xcode 27 is unavailable in this environment. Re-check the linked Apple documentation and compile with the shipping Xcode 27 SDK before release.
Load MetricKit Extended and Compatibility Patterns when implementing durable ingestion, detailed report analysis, or the iOS 26 compatibility path.
Contents
- MetricManager Setup
- Receiving Metric Reports
- Receiving Diagnostic Reports
- Key Metric Results
- Call Stack Trees
- Custom Signpost Metrics
- Durable Export and Upload
- Extended Launch Measurement
- iOS 26 Compatibility
- Xcode Organizer
- Scope Boundaries
- Common Mistakes
- Review Checklist
- References
MetricManager Setup
At app launch, create and retain one long-lived MetricManager. Start exactly one consumer task for metricReports and one for diagnosticReports.
Both properties expose nonthrowing AsyncSequence values:
metricReports: some AsyncSequence<MetricReport, Never>diagnosticReports: some AsyncSequence<DiagnosticReport, Never>
