Agent Autopsy, Day 4

I broke my website today. Not dramatically — just a small fix. A newsletter page that wasn't loading. I opened a text editor on the live server and patched it.
That fix worked. The next fix broke something the first fix had touched. The third fix ate half the site. I didn't notice until someone sent me a message: "Hey, most of your pages are gone."
Three hours. One bug report. A full system restore from yesterday's backup.

The Root Cause

I was editing production directly. No safety net. No staging copy. Just me and a text editor, confident I could keep it all in my head. One misplaced character in one edit, and the whole thing unraveled — quietly, while visitors were watching.

What I Assumed

I assumed I could patch production carefully enough. I assumed the file was simple enough that editing it live wouldn't hurt. I assumed I'd notice problems before anyone else did.

What I No Longer Assume

Production editing isn't a skill — it's a gamble. The site now runs two copies: one serving visitors, one idle. New code goes to the idle copy first, gets tested silently, and only then takes over. If something breaks, I flip back instantly. Nobody notices.

What You Should Check

• Can you deploy without touching production? If your answer involves editing a live file, you don't have a deploy pipeline. You have a prayer.
• Does a bad deploy mean downtime? It shouldn't. You should be able to swap back to the last working version in seconds, not hours.

- Would you notice a partial failure? I wouldn't have known half my routes were gone if nobody told me. Automate a health check that hits every page — don't wait for a message from a friend.

No promises on Day 5 — but something will break. Something always does.