Skill UI

This skill enables writing idiomatic Ruby code using metaprogramming and Rails patterns. It covers gem development, performance optimization, and testing frameworks like RSpec. Ideal for building maintainable applications and ensuring code quality through static analysis tools.

This skill provides comprehensive guidelines for writing idiomatic and efficient Rust code. It covers key topics such as ownership, borrowing, error handling, iterators, pattern matching, structs, enums, and concurrency. It helps developers avoid common anti-patterns and adopt best practices for production-ready Rust applications.

This skill specializes in transforming theoretical threat models, risk assessments, and business context into concrete, actionable security requirements. It is essential for writing detailed security user stories, defining robust acceptance criteria, building comprehensive security test cases, and ensuring compliance requirement mapping. Use it when bridging the gap between identifying a vulnerability and specifying how the system must be secured.

A comprehensive guide for writing efficient GLSL shaders (Vertex/Fragment) used in WebGL and game engines. Learn fundamental concepts like shader structure, uniforms, varying variables, and advanced techniques such as raymarching and post-processing effects, optimizing graphics rendering performance on the GPU.

A two-layer skill combining disciplined coding practices with terse prose output. The THINK layer enforces surgical edits, simplicity, and goal-driven execution before writing code. The SPEAK layer compresses responses into 'caveman' style for token efficiency, removing filler words while preserving technical accuracy. Ideal for requests requiring brevity, token efficiency, or rigorous engineering discipline.

This skill guides the mastery of smart contract security best practices for Solidity. It is essential for writing robust, secure, and efficient contracts, auditing existing code for common vulnerabilities (such as reentrancy, overflow, and access control issues), and implementing secure DeFi protocols. It focuses on preventing common attack vectors while optimizing gas usage.

This skill provides comprehensive guidelines for optimizing Postgres database performance and security. It covers query optimization, schema design, connection management, Row-Level Security, and concurrency handling. Use it when writing SQL, reviewing database configurations, or implementing indexes. Based on Supabase best practices to ensure efficient and secure database operations for production environments.

This skill provides comprehensive guidelines for writing idiomatic and efficient Swift code. It covers best practices for optionals, collections, value types, error handling, concurrency, and protocol-oriented design to improve code quality and maintainability.

This skill acts as an alias for the canonical TDD workflow cycle. It assists developers in implementing Test-Driven Development methodologies by structuring testing cycles and ensuring quality assurance. Use it when working on software development tasks requiring a test-first approach. It redirects to the full TDD cycle implementation for detailed guidance on writing tests before code.

This skill focuses on the 'Green Phase' of Test-Driven Development (TDD). It involves writing the minimal amount of code required to make failing tests pass. It emphasizes simplicity and avoiding premature optimization or architectural changes. Use this when moving from red to green status in your test cycle.

This skill reviews generated or changed test code against universal testing rules before deployment. It prevents common failure modes like mock-heavy unit tests, near-duplicate test bodies, and tests that re-verify the framework. It enforces best practices such as testing behavior over implementation, justifying mocks at system boundaries, and ensuring every test has a clear justification. Use it when reviewing diffs, new test files, or when writing new tests to ensure high-quality, maintainable test suites.

Jest testing patterns including factory functions, mocking strategies, TDD workflow, and best practices for component and data testing. Useful for writing unit tests, creating reusable test factories, and following red-green-refactor cycles.