Building React components with proper loading states, error handling, and user feedback is challenging and often results in confusing UX. This skill provides battle-tested UI patterns for handling async operations, showing appropriate feedback, and creating smooth user experiences.

Implementing RAG systems requires coordinating multiple components including embeddings, vector databases, and retrieval pipelines. This workflow provides a structured approach to build production-ready RAG applications.

Create production-ready, accessible design systems with Radix UI primitives. This skill provides patterns for headless component customization, theming strategies, and compound component architecture for React applications.

Develop and backtest algorithmic trading strategies with risk metrics and portfolio optimization. Get actionable insights for quantitative finance without requiring deep expertise in financial modeling.

Writing maintainable tests is challenging. This skill provides comprehensive pytest patterns including fixtures, mocking, parameterization, and TDD workflows to help you build reliable test suites.

Slow Python code wastes resources and frustrates users. This skill provides systematic profiling and optimization techniques to identify bottlenecks and improve performance.

Define consistent API schemas without manual boilerplate. This skill generates structured Pydantic models following established patterns for request validation, responses, and database integration.

Struggling with inconsistent AI outputs and unreliable responses. Learn proven prompt engineering patterns that maximize LLM performance, reliability, and controllability.

Struggling with query performance in event-sourced systems? This skill provides proven patterns for building efficient read models and projections from event streams.

Set up Prometheus for comprehensive metric collection, alerting, and infrastructure monitoring. This skill provides complete configuration guides for scrape targets, recording rules, and alert definitions.

Programmatic SEO can generate thousands of pages but risks thin content penalties if not done correctly. This skill evaluates feasibility and designs scalable page systems that avoid doorway pages and index bloat.

Struggling to price your product confidently? This skill provides research-backed frameworks for value-based pricing, tier design, and monetization strategy that align with customer willingness to pay.

Avoid common PowerShell pitfalls that cause script failures. Learn proper operator syntax, error handling, and Windows-specific patterns for reliable automation.

Send templated emails, manage templates, and monitor delivery stats through Postmark's API via Rube MCP. Streamline your transactional email workflows without manual API calls.

Manually managing PostHog events and feature flags is time-consuming and error-prone. This skill enables AI assistants to capture events, query analytics, and manage feature flags through natural language commands via MCP tool orchestration.

PostgreSQL databases can suffer from slow queries and poor performance without proper optimization. This skill provides a systematic workflow for query tuning, indexing, and configuration management.

Struggling with slow database queries and poor performance? This skill provides battle-tested PostgreSQL optimization rules from Supabase with concrete SQL examples and measurable performance improvements.

Shell scripts often fail on different systems due to bash-specific features. This skill ensures your scripts run everywhere using strict POSIX compliance.

Create popups and modals that capture leads and drive conversions without annoying users or harming your brand. Get strategy, copy, triggers, and design rules from conversion rate experts.

This skill enables Claude Code to automate browser interactions using Playwright, handling dev server detection, test script execution, and comprehensive web testing capabilities.