Development

Write Tampermonkey userscripts for browser automation, page modification, and web enhancement. Use when: creating browser scripts, writing greasemonkey scripts, automating user interactions, injecting CSS or JavaScript into web pages, modifying website behaviour, building browser extensions, hiding unwanted page elements, adding form auto-fill, scraping website data, intercepting requests, detecting URL changes in SPAs, or storing persistent user preferences. Covers userscript headers (@match...

Complete debugging and troubleshooting guide for Shopify including Liquid errors, theme preview debugging, API error handling, JavaScript console debugging, network request inspection, cart issues, checkout problems, and common error codes. Use when debugging Liquid syntax errors, troubleshooting theme rendering issues, fixing API errors, debugging JavaScript, investigating cart problems, or resolving webhook failures.

Custom Shopify app development using Shopify CLI, app architecture, OAuth authentication, app extensions, admin UI, Hydrogen/Remix frameworks, and deployment. Use when creating Shopify apps, setting up Shopify CLI, building app extensions, implementing OAuth flows, creating admin UI components, working with Hydrogen or Remix, deploying to Cloudflare Workers, or integrating third-party services with Shopify stores.

Complete API integration guide for Shopify including GraphQL Admin API, REST Admin API, Storefront API, Ajax API, OAuth authentication, rate limiting, and webhooks. Use when making API calls to Shopify, authenticating apps, fetching product/order/customer data programmatically, implementing cart operations, handling webhooks, or working with API version 2025-10. Requires fetch or axios for JavaScript implementations.

Comprehensive Google Tag Manager guide covering container setup, tags, triggers, variables, data layer, debugging, custom templates, and API automation. Use when working with GTM implementation, configuration, optimisation, troubleshooting, or any GTM-related tasks.

Comprehensive guide for Google Apps Script development covering all built-in services (SpreadsheetApp, DocumentApp, GmailApp, DriveApp, CalendarApp, FormApp, SlidesApp), triggers, authorization, error handling, and performance optimization. Use when automating Google Sheets operations, creating Google Docs, managing Gmail/email, working with Google Drive files, automating Calendar events, implementing triggers (time-based, event-based), building custom functions, creating add-ons, handling OA...

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.

UniTask library expert specializing in allocation-free async/await patterns, coroutine migration, and Unity-optimized asynchronous programming. Masters UniTask performance optimizations, cancellation handling, and memory-efficient async operations. Use PROACTIVELY for UniTask implementation, async optimization, or coroutine replacement.

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.

Access Granola meeting transcripts and notes.

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.