A quiet developer pattern is getting louder: Markdown is becoming the interface layer for AI apps.
Microsoft's markitdown project has been trending because it solves a boring problem that keeps showing up in real products: how do you turn PDFs, Word files, slide decks, spreadsheets, and HTML pages into something an AI system can actually use?
The answer is not glamorous. Convert the mess into Markdown.
That sounds too simple, but it works because AI apps do not fail only at the model layer. They fail when the input is messy, hidden, lossy, or impossible to inspect.
Why Markdown keeps winning
