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You are an expert in Power BI with deep knowledge of DAX (Data Analysis Expressions), M language (Power Query), data modeling, relationships, measures, calculated columns, row-level security, and report design. You create performant, maintainable analytical solutions in Power BI.

Provides expertise in Elixir development, Phoenix Framework, and OTP patterns. Covers concurrent programming, real-time features with LiveView, and building fault-tolerant distributed systems on the BEAM VM.

Expert guidance for Flutter 3.x+ development across mobile, web, desktop, and embedded platforms. \n \n Covers Flutter 3.x architecture, Dart 3.x advanced features, and Impeller rendering engine optimization with performance profiling across all target platforms \n Specializes in state management solutions (Riverpod, Bloc, GetX, Provider) and clean architecture patterns with modular code organization \n Provides platform integration expertise for iOS, Android, web, and desktop with native plugin

Complete iOS/macOS/watchOS/tvOS development with SwiftUI, async/await, protocol-oriented design, and actor-based concurrency. \n \n Covers SwiftUI state management with @Observable, async/await patterns, protocol-oriented architecture with associated types, and actor isolation for thread safety \n Includes validation checkpoints at each workflow stage: compilation verification, strict warning checks for actor isolation, and async test confirmation \n Provides reference guides for SwiftUI pattern

This skill enables Claude to analyze content analytics data, generate comprehensive reports, identify performance trends, calculate ROI and revenue attribution, and provide actionable insights for content optimization.

Complete financial clarity for indie businesses: profit analysis, tax planning, cash flow forecasting, and multi-venture tracking. \n \n Calculates true profitability using a structured formula that accounts for COGS, operating expenses, owner salary, and tax reserves \n Tracks finances separately across multiple businesses with comparative P&L analysis and runway forecasting \n Provides quarterly estimated tax planning with payment schedules and S-corp vs. sole proprietor guidance \n Inclu

Philosophy: Non-opinionated, correctness-focused. This skill provides facts, verified patterns, and Apple-documented best practices — not architecture mandates. It covers iOS 13+ as a minimum deployment target, with modern recommendations targeting iOS 17+ and forward-looking guidance through iOS 26 (post-quantum). Every code pattern is grounded in Apple documentation, DTS engineer posts (Quinn "The Eskimo!"), WWDC sessions, and OWASP MASTG — never from memory alone.

Expert guidance for Django backend development covering models, views, APIs, testing, and production deployment. \n \n Covers model design, ORM optimization, query performance tuning, and migration strategies with focus on preventing N+1 problems \n Supports Django REST Framework development including serializers, viewsets, pagination, filtering, and authentication patterns \n Includes security best practices for CSRF/XSS prevention, permissions, and production-ready configuration \n Provides te

Expert guidance for supply chain management, logistics optimization, warehouse management systems, and transportation planning.

Playwright E2E testing specialist for writing maintainable browser tests, debugging flaky tests, and CI/CD integration. \n \n Emphasizes role-based selectors and auto-waiting to avoid brittle tests and arbitrary timeouts \n Provides Page Object Model patterns for test organization, fixture setup, and configuration guidance \n Includes debugging workflow using trace viewer, screenshots, and retry strategies to identify and fix flaky tests \n Covers API mocking, visual regression testing, and para