Skill UI

This skill focuses on reversing JavaScript-based custom DSL and Virtual Machine interpreters, commonly found in risk-control and captcha engines. It involves identifying IIFE and switch-based opcode dispatch patterns, extracting opcode tables, and capturing runtime semantics. The workflow includes static analysis for variable mapping and opcode classification, as well as runtime injection techniques to understand exported functions. It excludes standard WASM and typical Webpack bundles.

This skill provides functional programming patterns for building type-safe and testable backend services using fp-ts in Node.js or Deno environments. It covers dependency injection, service composition, and handling typed backend errors with ReaderTaskEither. Ideal for developers refactoring legacy code or implementing functional architecture principles in modern JavaScript runtimes.

Build applications using Google Gemini API hosted models including Gemini and Gemma 4. Covers multimodal content handling (text, images, audio, video), function calling, structured outputs, and current model specifications. Includes SDK usage for Python, JavaScript/TypeScript, Go, and Java with installation instructions.

Build real-time bidirectional streaming applications using the Gemini Live API. Supports WebSocket-based audio/video/text streaming, voice activity detection, function calling, and session management. Includes SDKs for Python and JavaScript for low-latency AI interactions.

Extract backend API routes from SPA JavaScript bundles to identify missing authentication or broken access control vulnerabilities. Test endpoints without credentials to find unauthenticated data exposure and security gaps in web applications.

Learn and apply 33+ essential JavaScript concepts, covering fundamentals, tricky behavior, debugging, code review, and language quirks for developers.

This comprehensive guide provides patterns and best practices for implementing robust testing strategies in modern JavaScript and TypeScript applications. It covers setting up test infrastructure, writing unit tests for functions and classes, creating integration tests for APIs, and implementing end-to-end tests for user flows, supporting TDD and CI/CD integration.

Scaffold production-ready TypeScript projects with modern tooling including pnpm, Vite, Next.js, type safety, testing setup, and best practices. Supports Next.js, React+Vite, Node.js API, libraries, and CLI projects.

Generates Jest unit and integration tests for JavaScript or TypeScript projects. Supports mocking, snapshots, async testing, and React component testing. Ideal for verifying code logic, UI interactions, and API behavior using standard testing patterns.

A skill for reverse engineering front-end web applications. It helps locate API signature chains, analyze encrypted request parameters, sample runtime behavior, and reproduce logic locally in Node.js for evidence-based output. Suitable for security assessments and understanding client-side encryption.

This comprehensive guide covers advanced topics in modern JavaScript (ES6+), focusing on functional programming patterns and industry best practices. It is ideal for developers looking to refactor legacy code, optimize performance, manage asynchronous operations (Promises/async-await), and build highly maintainable, scalable web applications.

This skill provides expert guidance for writing JavaScript code within n8n Code nodes. It covers using $input, $json, and $node syntax, making HTTP requests with $helpers, and working with dates using DateTime. It helps with troubleshooting Code node errors and choosing between Code node modes. Use this for complex transformations, custom calculations, recursive operations, and data aggregation that simple nodes cannot handle.