Multiplatform logging in Kotlin Multiplatform with Kermit (co.touchlab:kermit:2.0.7). Use when adding logging to shared code - the global Logger, severity levels (v/d/i/w/e/a), Logger.withTag for per-class tags, configuring LogWriters and minSeverity, building a custom Logger with StaticConfig, and routing warnings/errors to Crashlytics or Bugsnag. Kermit writes to Logcat on Android and OSLog on iOS automatically; Napier is a lighter alternative. For Android-only Logcat/ADB/ANR debugging use android-skills:android-debugging; for analytics events (not logs) use analytics-patterns.