Your AI Agent Demo Was Impressive. Your Production Deploy Was a Disaster. Here's Why.

The demo took me four hours to build and six minutes to present. The room loved it. My agent could browse the web, summarize documents, write follow-up emails, and update a Notion database, all from a single natural language prompt. Someone said it looked like "the future." A few people asked if it was for sale. Three weeks later, I tried to deploy a production version of it for a small internal team. It lasted two days before I quietly killed it. What Happened On day one, it summarized the wrong document because the filename had an emoji in it. On day two, it sent a half-finished email because the LLM hit a rate limit mid-task, the retry logic didn't pick up where it left off, and nobody had built a way to detect incomplete success. By day three, a team member asked it to "clean up the project folder." It deleted 11 files it had "decided" were duplicates. They were not duplicates. There was no undo. The demo had none of these problems because I was watching it the entire time. I was t