testing-plugin

Run tests and report results. Detects the project's test framework, executes tests with agentic-optimized flags, and returns a concise summary to the orchestrator.

Property-based testing with Hypothesis for discovering edge cases and validating invariants. Use when testing code with many possible inputs, verifying mathematical properties, testing serialization round-trips, or finding edge cases that example-based tests miss.

Validate test effectiveness with mutation testing using Stryker (TypeScript/JavaScript) and mutmut (Python). Find weak tests that pass despite code mutations. Use when user mentions mutation testing, Stryker, mutmut, test effectiveness, finding weak tests, or improving test quality through mutation analysis.

Playwright CLI browser automation for AI agents. Navigate pages, take screenshots, fill forms, click elements from the command line. Use when automating browser tasks with shell access. Prefer over Playwright MCP (4-10x more token-efficient).

Playwright end-to-end testing for web applications. Cross-browser testing (Chromium, Firefox, WebKit), visual regression, API testing, mobile emulation. Use when writing E2E tests, testing across browsers, or setting up automated UI testing workflows.

Property-based testing with fast-check (TypeScript/JavaScript) and Hypothesis (Python). Generate test cases automatically, find edge cases, and test mathematical properties. Use when user mentions property-based testing, fast-check, Hypothesis, generating test data, QuickCheck-style testing, or finding edge cases automatically.