Test API integrations by mocking responses, intercepting requests, and monitoring network traffic. Use when the user wants to mock backend APIs, simulate errors, test offline behavior, intercept requests, or add authentication headers.
Automates browser interactions using Playwright for web testing, debugging, and automation. Use when the user needs to navigate websites, take screenshots, fill forms, click elements, extract page content (HTML/text), audit accessibility (ARIA/AX tree), measure Web Vitals performance, monitor console logs and HTTP requests, mock API responses, execute JavaScript in browser, inspect React components, compare UI with Figma designs, or perform non-blocking debugging with tracepoints, logpoints, and exception monitoring.
Automated browser testing, interaction automation, and form testing. Use when the user needs to test web pages, automate browser interactions, fill forms, test validation, run multi-step wizards, or test login/signup flows.
Debug web and Node.js applications using console inspection, network analysis, and non-blocking code debugging. Use when the user reports bugs, wants to debug JavaScript (browser or backend), inspect network requests, troubleshoot page/API issues, trace function calls, or monitor exceptions.
CLI for debugging Node.js backend processes with non-blocking inspection. Use when the user needs to connect to Node.js processes (by PID, name, Docker, or port), set tracepoints/logpoints/exceptionpoints, capture call stacks and local variables, or inspect console logs. Requires daemon; connect before other debug commands.
Monitor and debug web and Node.js applications using OpenTelemetry, console logs, network requests, and distributed tracing. Use when the user asks about distributed tracing, correlating frontend/backend requests, OpenTelemetry, Jaeger, or monitoring application behavior.
Analyze web and backend performance using Web Vitals, network timing, and Node.js metrics. Use when the user asks about page performance, load times, Core Web Vitals (LCP, CLS, INP), slow pages, backend bottlenecks, or SEO performance factors.
Debug React applications by inspecting components, props, and the component tree. Use when the user is debugging React apps, wants to inspect component props/state, find which component renders an element, or understand the React component hierarchy.