Coding standards, frameworks, refactoring, and code review (18.7K skills)
Use this skill to integrate Game Center features into a game, including player authentication, leaderboards, achievements, matchmaking, match data exchange, and turn-based play. It also covers the dashboard, player restrictions, and saved-game or identity patterns.
Use EnergyKit in smart home and energy management apps to read forecasts of cleaner or potentially cheaper electricity periods. The guide shows how to submit EV charging and HVAC load events and query historical energy or runtime insights for a venue.
Design and troubleshoot keyboard and directional focus in SwiftUI and UIKit apps. Manage initial focus, movement between controls, scene-aware commands, focus restoration after presentations, and custom routing for platforms such as tvOS, macOS, watchOS, and visionOS connected-input flows.
Use this skill to schedule iOS work that runs outside the active app, from short refreshes and maintenance to continuing exports and background downloads. It explains task registration, cancellation and completion handling, silent push triggers, required settings, and simulated launch debugging.
Build video playback interfaces in Swift apps with AVKit. Configure standard player controls, Picture-in-Picture, AirPlay, subtitles, and playback speeds, and connect playback to system UI. The guide covers UIKit and SwiftUI patterns and the setup needed for background playback features.
Integrate HealthKit into Apple apps to request access, read and save health samples, calculate summaries, and prepare time-series data for charts. The skill also covers background updates and live workout sessions, including data types, units, and platform requirements.
Add automatic audio switching support for paired third-party Bluetooth headphones and earbuds. Register an accessory, report whether it is worn and which source devices are connected, then handle capability checks and update errors.
Implement and review map and location features in Swift apps for iOS and macOS. Work with map markers and overlays, live location updates, address lookup, place search, directions, and location permissions using MapKit and CoreLocation.
Build Swift app features that read, create, update, or let users pick contacts with Contacts and ContactsUI. The skill covers permission handling, efficient contact fetching, save requests, and presenting CNContactPickerViewController from SwiftUI.
Integrate Apple Music into iOS apps with catalog search, subscription checks, playback, and queue controls. The skill also covers showing track details on the Lock Screen and handling playback commands from supported remote controls.
Implement privacy-preserving ad measurement with AdAttributionKit in iOS apps. Register ad impressions, update conversion values, process attribution postbacks, and handle re-engagement so teams can measure installs and returns without user-level identifiers.
Build and review networking in Swift apps with URLSession and async/await. Handle REST requests, uploads, downloads, streaming, pagination, retries, authentication middleware, caching, and network errors with patterns for foreground and background transfers.
Add DockKit support to camera apps by discovering compatible motorized docks, tracking faces, bodies, or custom subjects, and adjusting framing. The skill also covers direct pan and tilt control, accessory events, and hardware-specific setup requirements.
Build one-time app data migration flows for iOS using AppMigrationKit. The skill covers preparing files for transfer, importing them on the destination device, reporting progress and results, handling errors, and testing the migration logic.
Build iOS VoIP call flows that use the system call interface. The skill covers incoming and outgoing calls, PushKit notifications, audio session timing, and Call Directory data for caller identification and blocking.
Build PDF features in Apple platform apps with PDFKit. Display documents, navigate pages, search and extract text, add annotations, fill forms, create thumbnails, and wrap PDFView for SwiftUI interfaces.
Use this skill to add Apple Pay checkout and Wallet passes to an app. It covers payment buttons and requests, authorization callbacks, shipping details, merchant setup, and adding or checking signed passes, with examples for SwiftUI and UIKit.
Build markup and annotation features with PaperKit, combining PencilKit drawing with structured shapes, text, images, and lines. Integrate its editing canvas and insertion controls, configure supported features, and save or reload markup data across Apple platforms.
Review .NET type and API designs with performance in mind. Get guidance on sealing classes, using readonly structs for small values, choosing collection return types, delaying enumeration, and selecting Task, ValueTask, Span, or Memory where appropriate.
Apply C# nullable reference types to make null intent clear in code and APIs. The guidance covers compiler flow analysis, nullable-analysis attributes, safe use of the null-forgiving operator, public API compatibility, C# 14's field keyword, and incremental migration of legacy projects.
Plan changes to public .NET APIs and distributed system formats while preserving compatibility for existing users. Review source, binary, and wire compatibility, choose versioning strategies, and identify breaking changes before they reach a release.
Guide the release workflow for skills and agents in the dotnet-skills Claude Code marketplace. It covers creating content, registering paths in plugin.json, validating the marketplace, updating versions, and tagging a release that triggers GitHub Actions.
Create compact AGENTS.md or CLAUDE.md indexes that help coding assistants choose relevant skills and agents for .NET tasks. Keep the routing list aligned with registry names as skills and agents are added, removed, or renamed.
Choose serialization formats for .NET APIs, messages, and stored data. Compare schema-based options such as Protobuf and MessagePack with JSON approaches, use System.Text.Json source generation for AOT scenarios, and plan compatible format changes.