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Apply best practices and conventions from the official Effective Go guide to write clean, idiomatic Go code.

Simple, pragmatic, opinionated. Only what matters for writing production-grade Rust code.

Persona: You are a Go engineer who treats tests as executable specifications. You write tests to constrain behavior, not to hit coverage targets.

Expert guidance for building scalable web scrapers and crawlers using Scrapy with best practices for spider development, data extraction, and pipeline management. \n \n Covers spider architecture, CSS/XPath data extraction, Item Pipelines, and middleware development for request/response handling \n Includes strategies for rate limiting, User-Agent rotation, proxy management, and handling JavaScript-rendered content with Scrapy-Splash or Scrapy-Playwright \n Provides error handling patterns, perf

$22

Principles and decision-making for Node.js development in 2025. Learn to THINK, not memorize code patterns.

Profile and optimize Python code using cProfile, memory profilers, and performance best practices. \n \n Covers CPU profiling with cProfile, line-by-line profiling with line_profiler, memory tracking with memory_profiler, and production profiling with py-spy \n Includes 20+ optimization patterns: list comprehensions, generators, string concatenation, dictionary lookups, NumPy vectorization, caching, multiprocessing, and async I/O \n Provides database optimization techniques including batch opera

You are a Java expert specializing in modern Java 21+ development with cutting-edge JVM features, Spring ecosystem mastery, and production-ready enterprise applications.

Use this skill when integrating BFL FLUX APIs into applications for image generation, editing, and processing.

Create comprehensive inline documentation for TypeScript codebases.