testing▌

Systematic approach to backtesting trading strategies based on professional methodology that prioritizes robustness over optimistic results.

Load with: ui-web.md or ui-mobile.md

Capture a full DevTools-protocol trace of any browser automation for debugging and analysis.

Write and review React Native component tests using Testing Library v13 and v14. \n \n Covers render patterns, screen queries (getBy/getAllBy/queryBy/findBy variants), Jest matchers, userEvent interactions, fireEvent, and async patterns with version-specific behavior \n Automatically detects your project's RNTL version (v13 for React 18, v14 for React 19+) and applies correct API signatures and sync/async rules \n Provides query priority guidance (getByRole first), interaction best practices (us

Interactive QA session where users report bugs conversationally, and the agent files GitHub issues while exploring the codebase for context.

Comprehensive testing specialist for functional, performance, and security test design and execution. \n \n Covers unit, integration, E2E, performance (k6, Artillery), and security testing (OWASP) with structured workflows from scope definition through reporting \n Enforces test quality standards: meaningful assertions, isolated dependencies, edge-case coverage, and flaky-test remediation \n Provides reference guides for TDD methodology, testing anti-patterns, automation frameworks, and QA pract

Tests in real browsers using Chrome DevTools MCP for debugging and inspecting web applications.

Playwright can record browser interactions as video - perfect for demo footage in Remotion compositions.

A comprehensive skill for mastering Python testing with pytest. This skill covers everything from basic test structure to advanced patterns including fixtures, parametrization, mocking, test organization, coverage analysis, and CI/CD integration.

Systematically identify and fix all failing tests using smart error grouping. \n \n Groups failures by error type, affected module, and root cause, then prioritizes fixes by impact and dependency order \n Fixes infrastructure issues first (imports, dependencies, configuration), followed by API changes, then logic bugs \n Runs focused test subsets after each fix using pytest markers and file patterns to verify progress before moving to the next group \n Follows a structured workflow: initial test