Mobile

Frontend-backend pagination standard, defining minimal parameter naming to reduce transmission characters, applicable to all system pagination scenarios.

Generic BAML patterns for type-safe LLM prompting. Covers schema design, DTO generation, client wrappers, and cross-language codegen. Framework-agnostic.

Audits application security (XSS, CSP, vulnerable dependencies, CORS). Use before releases, after adding dependencies, or modifying security-utils.js

Master iOS, Android, React Native, and Flutter development. Build native and cross-platform mobile apps with modern frameworks, handle platform-specific features, optimize performance, and deploy to app stores.

Test Swift applications - XCTest, Swift Testing, UI tests, mocking, TDD, CI/CD

Create a short summary of recent handoff log entries without modifying the append-only log.

Teach Swift and iOS 26 development to experienced developers

Build stateful Durable Objects for real-time apps, WebSocket servers, coordination, and persistent state. Use when: implementing chat rooms, multiplayer games, rate limiting, session management, WebSocket hibernation, or troubleshooting class export, migration, WebSocket state loss, or binding errors.

Expert guidance on Swift 6.2 Approachable Concurrency for iOS 26+. Use when working with async/await, Tasks, actors, MainActor, Sendable, isolation domains, migrating to Swift 6, fixing concurrency compiler errors, or understanding @concurrent. Provides mental models, migration strategies, and safe concurrent Swift patterns.

Implement based on an approved plan. Use after cc-plan is finalized.

Expert guidance for .NET MAUI Blazor Hybrid development combining native mobile/desktop apps with Blazor web UI. Use when working with: (1) .NET MAUI Blazor Hybrid apps, (2) BlazorWebView components, (3) Cross-platform apps sharing Blazor UI, (4) Platform integration in Blazor Hybrid, (5) MVVM with Blazor components, (6) Navigation between MAUI pages and Razor components, (7) Shared Razor Class Libraries (RCL) for MAUI and Web. Applies to any .NET MAUI project using Blazor for UI.

URL validation and contextual analysis specialist. Use when validating links, analyzing URL context, extracting links from content, or ensuring link appropriateness. Combines technical validation with content analysis.

Analyze fundamental data primitives, type systems, and state management patterns in a codebase. Use when (1) evaluating typing strategies (Pydantic vs TypedDict vs loose dicts), (2) assessing immutability and mutation patterns, (3) understanding serialization approaches, (4) documenting state shape and lifecycle, or (5) comparing data modeling approaches across frameworks.

Create a target for haskell application.

Deploy applications to Vercel. Use when the user says "deploy", "deploy to Vercel", "push to production", "deploy my app", or "go live".

This skill should be used when users drop off mid-task, motivation fades, or experiences feel flat. Applies Peak-End Rule, Goal-Gradient Effect, and Zeigarnik Effect.

Process and implement code review feedback systematically. Use when user provides reviewer comments, PR feedback, code review notes, or asks to implement suggestions from reviews. Activates on phrases like "implement this feedback", "address review comments", "fix review issues", "apply these suggestions", or when user pastes reviewer notes.

Write unit and integration tests following the project's testing patterns with Jest. Use this skill when creating test files (*.spec.ts), writing unit tests for DTOs and domain entities, writing integration tests for use cases and queries, setting up test fixtures, or using test utilities. This includes organizing tests in test/unit/ and test/integration/ directories, using proper test naming conventions, mocking external dependencies, and testing with real database transactions for integration tests. Apply when working with any *.spec.ts file, test fixtures, or implementing the project's test-behavior-not-implementation philosophy.

Expert in React Native development, native modules, platform-specific code, navigation, AsyncStorage, styling, animations, and app deployment to iOS/Android stores

Apply safe refactoring patterns to improve code structure without changing behavior. Use when cleaning up code, reducing technical debt, or improving maintainability.