Unit Testing

Provides a comprehensive guide and templates for creating integration tests for FastAPI applications. Use this skill when you need to set up or write integration tests involving a database, authentication, file uploads, or error handling. It includes patterns for pytest fixtures, test client usage, and test data factories.

Build React components using @fpkit/acss library patterns. Scaffolds complete component structures (tsx, types, scss, stories, tests), validates CSS variables follow naming conventions (--component-property with rem units), enforces TypeScript patterns, accessibility standards (WCAG 2.1 AA), and Storybook documentation. Use when building new components, generating boilerplate, or refactoring to use fpkit primitives. Includes automation scripts, reference guides, and templates.

Creates a new domain following DDD architecture pattern with all 4 layers (Repository, API Client, Hooks, Components), boilerplate files, and test stubs. Use when starting a new feature domain.

Testing strategies and best practices

Comprehensive guide for Shopify CLI app development lifecycle. Use when working with Shopify apps - initializing projects, managing TOML configurations, running local development (shopify app dev), deploying extensions, setting up multi-environment workflows (dev/staging/prod), or automating CI/CD pipelines. Includes helper scripts for common tasks like environment setup, config validation, webhook testing, and deployment automation.

Returns a simple 'Hello World' message. Use this tool for testing MCP connection.

Visual regression testing with Playwright and Percy. Use when implementing screenshot-based testing.

Automatically runs project validation commands (linters, type checkers, tests) after file edits and blocks commits on any failure. Reads validation commands from CLAUDE.md or auto-detects from project type. Enforces strict quality gates to catch issues early. (project)

Write clear, testable requirements using User Stories and Gherkin scenarios. Capture functional and non-functional requirements with proper acceptance criteria. Use when defining new features or documenting system behavior.

Systematic refactoring with small-step discipline. Use when user says 'refactor', 'clean up', 'restructure', 'extract', 'rename', 'simplify', or mentions code smells. Enforces one change → test → commit cycle. For structural improvements, NOT style/formatting (use /lint). NOT for adding features or fixing bugs.

Teaches testing Server Actions in isolation in React 19. Use when testing Server Actions, form handling, or server-side logic.

Use this skill when the user wants to call different LLM models through OpenRouter's unified API, compare model responses, track costs and response times, or find the best model for a task. Triggers include requests to test models, benchmark performance, use specific providers (OpenAI, Anthropic, Google, etc.), or optimize for speed/cost.

WHEN: Test code generation, unit/integration/E2E test writing, component/hook/utility testsWHAT: Framework detection + Jest/Vitest/RTL/Playwright templates + Happy Path/Edge/Error case testsWHEN NOT: Coverage analysis → coverage-analyzer, Test quality review → code-reviewer

Validate WCAG 2.1 compliance, screen reader compatibility, and Universal Design for Learning (UDL) principles implementation throughout curriculum materials. Use when checking accessibility, validating UDL, or ensuring compliance. Activates on "accessibility check", "WCAG validation", "UDL review", or "screen reader test".

Running and validating Probitas scenarios. Use when executing tests, running scenarios, or debugging test failures.

Jest and React Native Testing Library patterns. Use when writing component tests.

Core test infrastructure patterns for monorepo Vitest setup including global configuration, browser API polyfills, mocking patterns, test cleanup, directory structure, and coverage philosophy. Use when setting up Vitest test infrastructure, configuring test environments, implementing test utilities, or establishing test standards. Triggers on: vitest setup, test configuration, test infrastructure setup, test mocking patterns, test cleanup, test standards, monorepo testing.

Quantitative trading expertise for DeFi and crypto derivatives. Use when building trading strategies, signals, risk management. Triggers on signal, backtest, alpha, sharpe, volatility, correlation, position size, risk.

Comprehensive persona journey testing and UX verification across all personas

Use Gemini CLI for web search powered by Google. Triggers on search requests where Google's search quality matters. Use for "google this", "search for...", "find information about...", "what's the latest on...".