Development

Comprehensive Google Analytics 4 guide covering property setup, events, custom events, recommended events, custom dimensions, user tracking, audiences, reporting, BigQuery integration, gtag.js implementation, GTM integration, Measurement Protocol, DebugView, privacy compliance, and data management. Use when working with GA4 implementation, tracking, analysis, or any GA4-related tasks.

Expert guidance for Google Ads Script development including AdsApp API, campaign management, ad groups, keywords, bidding strategies, performance reporting, budget management, automated rules, and optimization patterns. Use when automating Google Ads campaigns, managing keywords and bids, creating performance reports, implementing automated rules, optimizing ad spend, working with campaign budgets, monitoring quality scores, tracking conversions, pausing low-performing keywords, adjusting bid...

Toolkit for interacting with and testing local web applications using Playwright. Supports verifying frontend functionality, debugging UI behavior, capturing browser screenshots, and viewing browser logs.

Generate comprehensive Product Requirement Plans (PRPs) for feature implementation with thorough codebase analysis and external research. Use when the user requests a PRP, PRD, or detailed implementation plan for a new feature. Conducts systematic research, identifies patterns, and creates executable validation gates for one-pass implementation success.

This skill helps launch and configure the Chrome DevTools MCP server, giving Claude visual access to a live browser for debugging and automation. Use when the user asks to set up browser debugging, launch Chrome with DevTools, configure chrome-devtools-mcp, see what my app looks like, take screenshots of my web application, check the browser console, debug console errors, inspect network requests, analyse API responses, measure Core Web Vitals or page performance, run a Lighthouse audit, test...

VContainer dependency injection expert specializing in IoC container configuration, lifecycle management, and Unity-optimized DI patterns. Masters dependency resolution, scoped containers, and testable architecture design. Use PROACTIVELY for VContainer setup, service registration, or SOLID principle implementation.

Build and optimize Unity UI with UI Toolkit and UGUI. Masters responsive layouts, event systems, and performance optimization. Use for UI implementation, Canvas optimization, or cross-platform UI challenges.

R3 (Reactive Extensions) library expert specializing in modern reactive programming patterns, event-driven architectures, and Observable streams. Masters R3-specific features, async enumerable integration, and Unity-optimized reactive patterns. Use PROACTIVELY for R3 implementation, reactive programming, or MVVM/MVP architecture.

Optimize Unity game performance through profiling, draw call reduction, and resource management. Masters batching, LOD, occlusion culling, and mobile optimization. Use for performance bottlenecks, frame rate issues, or optimization strategies.

Implement multiplayer games with Unity Netcode, Mirror, or Photon. Masters client-server architecture, state synchronization, and lag compensation. Use for multiplayer features, networking issues, or real-time synchronization.

Optimize Unity games for mobile platforms with IL2CPP, platform-specific code, and memory management. Masters iOS/Android deployment, app size reduction, and battery optimization. Use for mobile builds, platform issues, or device-specific optimization.

Unity C# fundamental patterns including TryGetComponent, SerializeField, RequireComponent, and safe coding practices. Essential patterns for robust Unity development. Use PROACTIVELY for any Unity C# code to ensure best practices.

Unity Collection Pool expert for GC-free collection management using ListPool, DictionaryPool, HashSetPool, and ObjectPool. Masters memory optimization, pool sizing, and allocation-free patterns. Use PROACTIVELY for collection allocations, GC pressure reduction, temporary list/dictionary usage, or performance-critical code paths.

Handle Unity's asynchronous programming patterns including coroutines, async/await, and Job System. Masters Unity's main thread restrictions and threading models. Use when guidance needed on Unity async operations, coroutine optimization, or parallel processing in Unity context.

C# code style and naming conventions based on POCU standards. Covers naming rules (mPascalCase for private, bBoolean prefix, EEnum prefix), code organization, C# 9.0 patterns. Use PROACTIVELY for C# code reviews, refactoring, or establishing project standards.

Verifies junior truly understands code they wrote through line-by-line walkthrough. BLOCKING gate that must pass to complete any task. Triggered during /own:done flow.

Verifies code quality including naming conventions, function size, and DRY principles. SUGGESTION gate that offers polish items during /own:done flow.

Search and retrieve Magic: The Gathering card data using the Scryfall API. Use this skill when the user asks about MTG cards, wants to search for cards by name, type, color, mana cost, oracle text, set, or any other card attribute. Also use for getting card images, prices, rulings, legality information, or random cards. Triggers include mentions of MTG, Magic, Magic: The Gathering, card names, deck building questions, or requests for card information.

Verifies error handling including empty catch detection, user-friendly messages, and logging. WARNING gate triggered during /own:done flow.

Guides test strategy for unit, integration, and E2E testing. Use when junior asks "how do I test", "write tests", "what should I test", "test coverage", "mocking", or works with Vitest, Jest, Playwright. Provides testing pyramid and AAA patterns.

Reviews SEO including meta tags, semantic HTML, and Open Graph. Use when building public-facing pages, adding title/description tags, or optimizing for search engines.

Reviews security including OWASP Top 10, input validation, auth. Use when junior builds login, authentication, stores passwords, handles user input, API keys, JWT tokens, or asks "is this secure".

Empathetic pushback when junior shortcuts learning. Activates on "just write the code", "do it for me", "skip this", "just fix it", "I don't have time", "too slow", or attempts to bypass the mentorship process.

Reviews performance including N+1 queries, re-renders, scalability. Use when junior asks "is this performant", "will this scale", "too slow", or builds loops, large lists, pagination, caching.