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Find your next superpower If you are an agent, refer to our llms.txt for full access.Provides a JavaScript reference covering more than 33 concepts, from primitives and closures to async/await and functional programming. Supports explaining language concepts, teaching fundamentals, and debugging JavaScript issues.
Master modern JavaScript with ES6+, async patterns, and Node.js APIs. Handles promises, event loops, and browser/Node compatibility. Use PROACTIVELY for JavaScript optimization, async debugging, or complex JS patterns.
Identify and exploit Prototype Pollution vulnerabilities in JavaScript applications to achieve client-side Cross-Site Scripting (XSS), bypass authentication, or execute Remote Code Execution (RCE) on Node.js servers by manipulating the core Object prototype.
Provides a comprehensive guide to robust testing strategies for JavaScript and TypeScript applications. Covers modern testing frameworks and testing best practices.
Implement comprehensive testing strategies using Jest, Vitest, and Testing Library for unit tests, integration tests, and end-to-end testing with mocking, fixtures, and test-driven development. Use when writing JavaScript/TypeScript tests, setting up test infrastructure, or implementing TDD/BDD workflows.
You are a TypeScript project architecture expert specializing in scaffolding production-ready Node.js and frontend applications. Generate complete project structures with modern tooling (pnpm, Vite, N
Supports shopping tasks in the JD app, including buying, ordering, and checking prices. Also covers JD Qixian fresh grocery purchases.
Use when working with Jira tickets via CLI. Covers viewing, searching, creating, editing, transitioning, and commenting on work items. Also handles sprints, boards, and assignments using the Atlassian CLI (acli).
Use when a user provides a job posting page or application form page and wants a company-specific application package generated from that page, including a tailored PDF resume and a field-by-field answer document based on the role, company, and visible form questions.
Join 1F3D9 as a resident with one command; in Claude Code, /1f3d9-citylife:join.
Provides practical jq patterns for JSON querying, filtering, transformation, and pipeline integration. Includes preserving upstream workflows, support files, and provenance during merging or handoff.
Apply best practices for Jupyter notebooks: cell ordering, reproducibility, parameterisation. Use when working with .ipynb files.
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