The hidden infrastructure you build when you ship AI chat

A chat textarea is a 30-minute build. The persistence, streaming reassembly, dedup, tool-call audit trail, and history endpoint that turn it into a real product is 3+ weeks. A walkthrough of what breaks, in what order, and how to skip most of it. qlaud team · Engineering I added a chat UI to my app in 30 minutes. The actual chat infrastructure took three weeks. This post is what those three weeks were spent on, in what order each piece broke, and how I'd shortcut most of it if I were starting over. If you've shipped AI chat before, you know what I'm about to describe.