Unit Testing

TDD for process documentation - test with subagents before writing, iterate until bulletproof

Build confidence with comprehensive CLI testing. Unit tests catch logic bugs with fakes, integration tests verify API contracts, E2E tests validate workflows.

A specialist skill that designs and implements a testing strategy for a codebase. This skill should be used after code development and before code review.

Comprehensive guide to React component patterns used in the Plataforma B2B de treinamento técnico corporativo educational platform. This skill covers functional components with hooks, composition patterns, state management, props flow, and error handling strategies essential for building maintainable React applications.Learn how to create reusable, testable components following React best practices while avoiding common antipatterns like prop drilling, unnecessary class components, and improper state management. The skill emphasizes composition over inheritance, unidirectional data flow, and separation of concerns.Real-world examples are taken directly from the project codebase, including CLearningSystem, BashLearningSystem, Breadcrumb, AreaCard, and FlashcardModal components. Each pattern is demonstrated with production code showing how architectural decisions were implemented in a 5,500+ line React application with 17 components.Key topics include functional components (vs class components), React Hoo

Angular 21+ expert for .ts .html .css files, @Component, UI, components, pages, services, routing, forms, templates, signals, RxJS, HttpClient, inject(), reactive forms, validators, accessibility, WCAG, AXE, browser testing, Karma, Jasmine, e2e, Playwright

Enforces Red-Green-Refactor TDD cycle. Creates failing tests first, then minimum code to pass, then refactors while keeping tests green.

Build features when user wants to implement PRDs, write code for specs, or develop functionality. Works incrementally substory-by-substory with automatic testing and code review. Automatically loads PRD context to maintain consistency. Also writes standalone tests for any file.

Create and maintain high-quality Claude Code Skills through interactive discovery, web research, and comprehensive description writing standards. Use when building new Skills, researching latest best practices, updating existing Skills, writing skill descriptions with proper trigger keywords, or generating Skill packages backed by official documentation and real-world examples.

Add Espresso and AndroidX Test dependencies to Android project

Padronizar testes de integração com Testcontainers MySQL, garantindo isolamento, reuso seguro e aderência às políticas sem H2.

Use this skill when implementing, modifying, or fixing ANY scraper, discovery, or extraction code in the packages/scrapers directory. Triggers for tasks involving SmartDiscoveryAgent, SmartDishFinderAgent, PuppeteerFetcher, search engines, platform adapters, or related components. Orchestrates a rigorous test-driven workflow with use case definition BEFORE coding, followed by verification.

Testing patterns including pytest, unittest, mocking, fixtures, and test-driven development with extended thinking integration. Activate for test writing, coverage analysis, TDD, hypothesis-driven development, and quality assurance tasks.

Comprehensive repository initialization and scaffolding for new projects. Use when setting up a new repository from scratch with git, GitHub, CI/CD workflows, branch protection, validation checks (format, lint, type-check, tests, builds), git hooks (husky/lefthook), GitHub Actions for PR and main branch validation, automated versioning and tagging, and project-specific release workflows. Ideal for solo developers who want production-ready repository setup including (1) Git initialization with main branch, (2) GitHub repository creation and configuration, (3) Branch protection rules, (4) PR workflow with squash merging and auto-delete branches, (5) Comprehensive validation checks, (6) Git hooks for pre-commit and pre-push validation, (7) GitHub Actions CI/CD pipelines, (8) Automated releases with GitHub Releases integration.

Generate React components following DevPortfolio patterns with automatic scaffolding. Use when asked to create components, generate UI elements, scaffold new features, or create React components. Generates TypeScript components with proper structure, translations, tests, and animations.

Playwright best practices including selectors, wait strategies, accessibility testing, responsive design, and flaky-test prevention. Use when writing or improving Playwright E2E tests.

Testing introduction and simple TDD for beginners

Test coverage tracking and improvement strategies. Use when analyzing test coverage.

World-class data science skill for statistical modeling, experimentation, causal inference, and advanced analytics. Expertise in Python (NumPy, Pandas, Scikit-learn), R, SQL, statistical methods, A/B testing, time series, and business intelligence. Includes experiment design, feature engineering, model evaluation, and stakeholder communication. Use when designing experiments, building predictive models, performing causal analysis, or driving data-driven decisions.

Advanced swarm orchestration patterns for research, development, testing, and complex distributed workflows

Use when user requests new features or functionality. Defines complete workflow from specification through testing to implementation.