Go language expertise for writing idiomatic, production-quality Go code. Use for Go development, concurrency patterns, error handling, testing, and module management. Triggers: go, golang,...

Jest testing best practices for JavaScript and TypeScript applications, covering test structure, mocking, and assertion patterns.

Playwright testing. Use this skill to write and run automated tests for web applications using Playwright.

Help address review/issue comments on the open GitHub PR for the current branch using gh CLI; verify gh auth first and prompt the user to authenticate if not logged in.

Use when writing tests. Use when test structure is unclear. Use when arrange/act/assert phases are mixed.

Create or update a feature specification from a natural language feature description.

Automate browser interactions and web testing. Provides scriptable browser control for web scraping, testing, and automation.

Use when CI tests fail on main branch after PR merge, or when investigating flaky test failures in CI environments

RSpec testing best practices for Ruby and Rails applications, covering test organization, data management, and isolation patterns.

Test-Driven Development Iron Law. Write the test first. Watch it fail. Write minimal code to pass. No exceptions.

Cypress end-to-end testing best practices for web applications, covering test structure, commands, and reliability patterns.

Plan new features/integrations following SOLID principles. Analyzes codebase architecture, researches official documentation and best practices, designs extensible solution, and creates...

Playwright end-to-end testing best practices for web applications, covering test design, locator strategies, and assertion patterns.

This skill should be used when the user asks to "perform vulnerability scanning", "scan networks for open ports", "assess web application security", "scan wireless networks", "detect malware",...

Quality assurance expert for testing strategies and quality gates. Use when planning test coverage, setting up QA processes, or improving quality standards.

Deploy and manage cloud infrastructure on Cloudflare (Workers, R2, D1, KV, Pages, Durable Objects, Browser Rendering), Docker containers, and Google Cloud Platform (Compute Engine, GKE, Cloud Run,...

Test-driven development workflow. Write tests first, then implement. Use when building new features, fixing bugs, or refactoring code.

Refactor monolithic code into clean, single-responsibility modules following SOLID principles

Test web applications comprehensively for quality. Performs functional, integration, and user experience testing of web applications.

Run lint, build, and E2E tests in sequence. Use when the user wants to validate their code, run tests, or check if everything works before committing.