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Found 448 Skills
Add drawings, shapes, and a consistent markup experience using PaperKit. Use when integrating PaperMarkupViewController for markup editing, adding shape recognition, working with PaperMarkup data models, embedding markup tools in document editors, or building annotation features that need the system-standard markup toolbar. New in iOS 26.
Collect and analyze on-device performance metrics and crash diagnostics using MetricKit. Use when setting up MXMetricManager, handling MXMetricPayload or MXDiagnosticPayload, processing crash/hang/disk-write diagnostics via MXCallStackTree, adding custom signpost metrics, or uploading telemetry to an analytics backend.
Permission dialog UI for macOS accessibility and privacy settings, replicating the Codex Computer Use guided permissions flow
Use when adding Auth0 authentication to an iOS, macOS, tvOS, watchOS, or visionOS application — integrates the Auth0.swift SDK for native Apple platform authentication using Web Auth, CredentialsManager, and biometric protection.
Localization rules and audit workflow for cmux UI strings, settings rows, menus, shortcuts, schema/config text, docs, command/help text, alerts, tooltips, and web messages. Use whenever changing user-facing text.
Use when implementing Liquid Glass effects, reviewing UI for Liquid Glass adoption, debugging visual artifacts, optimizing performance, or requesting expert review of Liquid Glass implementation - provides comprehensive design principles, API patterns, and troubleshooting guidance from WWDC 2025. Includes design review pressure handling and professional push-back frameworks
Use when implementing 'CloudKit sync', 'CKSyncEngine', 'CKRecord', 'CKDatabase', 'SwiftData CloudKit', 'shared database', 'public database', 'CloudKit zones', 'conflict resolution' - comprehensive CloudKit database APIs and modern sync patterns reference
Use when build times are slow, investigating build performance, analyzing Build Timeline, identifying type checking bottlenecks, enabling compilation caching, or optimizing incremental builds - comprehensive build optimization workflows including Xcode 26 compilation caching
Expert error handling decisions for iOS/tvOS: when to use throws vs Result, error type design trade-offs, recovery strategy selection, and user-facing error presentation patterns. Use when designing error hierarchies, implementing retry logic, or deciding how to surface errors to users. Trigger keywords: Error, throws, Result, LocalizedError, retry, recovery, error presentation, do-catch, try, error handling, failure
Use when implementing internationalization (i18n), String Catalogs, pluralization, or right-to-left layout support. Covers modern localization workflows with Xcode String Catalogs and LocalizedStringKey patterns.
Use when ANY runtime debugging is needed — setting breakpoints, inspecting variables, evaluating expressions, analyzing threads, or reproducing crashes interactively with LLDB
Timer, DispatchSourceTimer, Combine Timer.publish, AsyncTimerSequence, Task.sleep API reference with lifecycle diagrams, RunLoop modes, and platform availability