Lumi is a Chrome add-on designed to enhance the interaction between users and AI coding agents by providing a visual prompt building experience. With its intuitive interface, users can select any webpage element with a single click and edit styles in real-time using WYSIWYG controls. The tool allows for easy annotation of screenshots with arrows, boxes, and text, making it particularly useful for frontend developers, designers, and anyone looking to visually communicate their ideas to AI.

This tool operates entirely on the user's device, ensuring privacy with zero data collection and no external server interactions. Key features include local processing, clipboard export for compatibility with any AI tool, and a set of convenient keyboard shortcuts for efficient use. Lumi is open source, reinforcing its commitment to user control and transparency.