Plandex is a terminal-based AI development tool designed to handle complex coding tasks across multiple files, with capabilities for planning, executing, and debugging changes autonomously. It supports a wide range of programming languages and integrates various AI models while maintaining project integrity through features like version control and automated debugging. Developers can use Plandex in both local and cloud-hosted environments, making it adaptable to different project sizes and complexities.

The article explores three distinct approaches to AI-assisted development: Vibe Coding, AI as a Copilot, and AI as a HUD. Each method has unique advantages and is suited for different tasks, with developers and designers using them in varying ways to enhance their workflows. The author emphasizes the importance of learning new skills to effectively utilize these AI tools and adapting prototypes into maintainable code.