Browse skills

Generate comprehensive, ready-to-run test suites from any source code — API routes, React/Vue components, backend services, CLI tools, database models. Supports Jest, Vitest, Pytest, Go testing, Playwright, Cypress. Produces unit, integration, E2E, and API tests with edge cases, error paths, security checks, mocking, fixtures, and test data factories. The complete test-writing replacement for any codebase.

Generate complete mock API servers from OpenAPI/Swagger specs, example request/response pairs, or natural language descriptions. Produces runnable mock server code (Node.js Express or Python Flask) with realistic fake data, configurable latency, error simulation, request validation, and stateful CRUD operations. Perfect for frontend development, integration testing, and CI pipelines when the real API isn't ready.

Generate comprehensive unit tests, integration tests, and E2E tests for any codebase. Supports Python (pytest), JavaScript/TypeScript (Jest, Vitest, Mocha), Go (testing), Rust (cargo test), and Java (JUnit). Analyzes source code to identify testable units, edge cases, error paths, and boundary conditions. Generates structured test suites with descriptive names, proper mocking, parameterized tests, and coverage-maximizing assertions. Includes mutation testing suggestions and property-based test hints.

An example skill for generating sample outputs.

Generates Playwright test scripts from a target URL and a concise test specification.

Interact with and test local web applications using Playwright: verify frontend functionality, debug UI behavior, capture browser screenshots, and read browser logs.