NeoLabHQ/context-engineering-kit ? reverse-engineered prompt

Build me a TypeScript project that acts like a marketplace of prompt skills and agents for coding assistants, focused on making AI coding results more reliable and predictable.

I want something I can install into tools like Claude Code, Cursor, OpenCode, Gemini CLI, and similar, with a clean way to add only the plugins I need. It should include the basic marketplace structure, install commands, plugin metadata, and a few example plugins that show the idea, like reflection, spec driven development, and code review help.

The main goal is not a fancy app, it’s a polished kit of reusable skills, prompts, and agents that can improve how an AI writes code, reviews code, and follows instructions. Keep it lightweight and token efficient, and make the docs clear enough that someone can install it quickly and start using it right away.

If anything in the current ecosystem has changed, look up the latest docs online before wiring up the install or plugin format.