Metrickit

This gives Claude the knowledge to help you implement MetricKit for collecting real-world performance data and crash diagnostics from production iOS and macOS apps. You'll want this when you're setting up MXMetricManager subscribers, processing daily metric payloads for CPU and memory stats, handling diagnostic payloads with crash call stacks, or building telemetry pipelines. The documentation covers the complete flow from registration through JSON export, including the tricky bits like extended launch measurement and custom signpost metrics. One thing to know: MetricKit delivers data once per callback, so you need to persist the JSON immediately or risk losing it.

skills.sh installs: 3.3K
GitHub stars: 1.3K
last updated: Aug 21, 2026

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Install

$ npx -y skills add dpearson2699/swift-ios-skills --skill metrickit --agent claude-code

Installs into .claude/skills of the current project.

Files

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.

SKILL.md on GitHub

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