A theme update breaks a hero image on Safari. A hosting provider changes a default. A CMS plugin starts injecting something. Nobody notices for six weeks, and when someone finally does, the only honest answer to “when did this start?” is a shrug. I have given that shrug more than once. This week I shipped Screenshot-a-Day v0.1.0 so I would stop having to. The idea is not new around here. It has been sitting on this site as a sketch since May 2024, back when I assumed the answer was a $10/year SaaS running Puppeteer on a Lambda. What actually shipped went the other direction on almost every one of those assumptions, and the reasons are the interesting part.