Generates RSpec tests in Ruby with describe/context/it blocks, matchers, let/before hooks, and mocking. Use when user mentions "RSpec", "describe do", "expect().to", "Ruby (SKILL.md metadata excerpt)
Write idiomatic Ruby code with metaprogramming, Rails patterns, and performance optimization. Specializes in Ruby on Rails, gem development, and testing frameworks. (SKILL.md metadata excerpt)
Run Ruff checks with optional scope and rule overrides, apply safe and unsafe autofixes iteratively, review each change, (Publisher-index excerpt; file read separately)
Cost-safety discipline for paid AI / inference APIs: treat $-cost as a third complexity dimension alongside time and space. Forces a written (SKILL.md metadata excerpt)
Master Rust async programming with Tokio, async traits, error handling, and concurrent patterns. Use when building async Rust applications, implementing concurrent systems, (SKILL.md metadata excerpt)
Master Rust async programming with Tokio, async traits, error handling, and concurrent patterns. Use when building async Rust applications, implementing concurrent systems, (SKILL.md metadata excerpt)