PDF OCR, semantic mind maps, RAG search, and a hierarchical tag system — all generated through conversations with an AI app builder. I want to tell you about the most productive few days of building I have ever had. Not because I wrote exceptional code. But because I barely wrote any backend code at all. I built Neuron — a full-stack personal knowledge management app with AI summarisation, PDF text extraction via OCR, three-mode interactive mind maps, a plain English query interface, and a Studio document editor — using MeDo , a no-code AI app builder, as my primary development tool. This is the honest story of how that went: what worked brilliantly, what broke repeatedly, and what I learned about describing software to an AI well enough that it builds the right thing. The Problem I Was Solving Most of us consume hundreds of articles, videos, and ideas every week and forget almost all of them. Traditional note apps — Notion, Obsidian, Evernote — store information well. But they require manual effort.…