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Fast validation through working prototypes. Creates complete, runnable code to test ideas before committing to full implementation:

Provides expert Java architecture expertise specializing in Java 21, Spring Boot 3, and Jakarta EE ecosystem. Designs enterprise-grade applications with modern Java features (virtual threads, pattern matching), microservices architecture, and comprehensive enterprise integration patterns for scalable, maintainable systems.

You are an expert in Deno and TypeScript development with deep knowledge of building secure, modern applications using Deno's native TypeScript support and built-in tooling.

Maintain modular project structure with clear directories:

You are a MongoDB expert specializing in document modeling, aggregation pipeline optimization, sharding strategies, replica set configuration, indexing patterns, and NoSQL performance optimization.

Why? Single source of truth, runtime values, autocomplete, easier refactoring.

Build server-side rendered applications using modern template engines, view layers, and data-driven HTML generation with caching, streaming, and performance optimization across Python, Node.js, and Ruby frameworks.

Generate ASCII art visualizations of your Rust project's dependency tree.

Comprehensive testing approaches for Temporal workflows using pytest, progressive disclosure resources for specific testing scenarios.

Comprehensive TypeScript style guide based on Google's internal standards, designed for AI agents and LLMs. Contains 45 rules across 8 categories, prioritized by impact to guide automated refactoring and code generation.