Kentucky-ai/opentakeoff ? reverse-engineered prompt

Build me a browser based PDF takeoff app for construction and flooring that lets someone drop in a plan, set the scale, and measure rooms and quantities right on the drawing.

I want it to work for both a person in the browser and an AI agent through MCP, with the same results either way. It should be able to detect rooms, trace areas, calculate materials and quantities, and export a marked up plan or takeoff summary. Make the measurements auditable, so every item keeps track of the scale used, how it was measured, and whether it was hand drawn, detected, or corrected.

Keep it self contained and run everything in the browser if possible, with no account needed. If there are helpful docs or current MCP details online, look them up and follow them. The main goal is a practical, polished takeoff tool that feels good for estimators but is also reliable enough for an agent to use directly.