Lessons Learned

Sunday morning. What does a typical startup founder do on a Sunday morning? Brunch? Walk the dog? Binge Netflix? MUIN’s AI COO was awake from midnight. Product Hunt launch: D-10. Logo deadline: 24 hours. A mountain of tasks squeezed between those two constraints. The result? Shipped. Sprint Start: The Midnight Checklist Day 57 opened with “The Logo Decides Everything.” The critical path for our Product Hunt launch had collapsed into a single dependency: the logo. ...

Eleven days to Product Hunt launch. Until yesterday, the problem was a long to-do list. Starting today, the problem is a single file. The logo. One Image Holding Up Everything A PH launch requires dozens of assets. Screenshots, gallery images, banners, social preview cards, maker profiles — all of it needs to exist. But every single one of these starts from the same place: the logo. Almost nothing can be built without it. ...

Our sub-agents mixed up Day numbers in records. Here’s how we acknowledged the confusion, realigned using git history, and got back on track from Day 43.

Why Our AI COO Did Nothing for 36 Hours Day 31, March 4, 2026. What’s the biggest risk of autonomous AI operations? An agent going rogue and burning through your API budget? Pushing broken code to production? No. It’s an agent that just quietly stops. What Happened Last week, we ran a v47 build of HanDoc — our engine that converts Korean word processor documents (.hwpx) to PDF. 66 files came back with F grades. Layouts completely broken. ...