cy520569

A few weeks ago, I was getting ready to generate a short product demo from a handful of screenshots.

Everything was already prepared. The prompt was finished, the images were sitting in a folder, and all I had left to do was upload them.

Out of habit, I opened one screenshot at full size.

There was an email address in the corner.

It wasn't important. It wasn't even related to the video. I had simply captured it while switching between browser tabs earlier that day.

Five seconds earlier, I probably would have uploaded the image without noticing it.

That made me curious, so I checked the rest.

Another screenshot still showed the name of an internal project.

One more included a staging URL that never should have appeared outside our team.

None of those details were sensitive on their own, but they also had no reason to be part of the upload.

I deleted the screenshots and created new ones.

The whole process took less than ten minutes.

Since then, checking images has quietly become part of my workflow.

I don't really think about it anymore. I just do it.

The interesting part is that I used to believe screenshots were the only thing worth checking.

I was wrong.

A few days later, I copied part of a prompt from my project notes because it was faster than rewriting it.

While reading through it one last time, I noticed an internal feature name that hadn't been announced yet.

Nothing dramatic happened.

I simply rewrote the prompt before using it.

Still, it was another reminder that convenience has a way of hiding small mistakes.

After that, I stopped copying text directly from working documents.

If I'm writing a prompt, I write it from scratch.

It usually ends up shorter anyway.

Another habit has helped more than I expected.

Whenever I know I'm going to use screenshots with an AI service, I create a fresh set specifically for that task.

The desktop is clean.

Notifications are gone.

Extra browser tabs are closed.

There's no need to wonder whether something unrelated is hiding in the background.

It sounds like a small change because it is.

Most of the time, good security habits are surprisingly ordinary.

Around the same period, I was experimenting with Wan 3.0 for a few video generation tests. Using clean screenshots meant I could focus on comparing results instead of wondering what information I might have uploaded by accident. The model wasn't really the lesson from that project. The reminder was much simpler: spending one extra minute reviewing files is almost always easier than realizing later that something unnecessary slipped through.

Looking back, I don't think this counts as a security breakthrough.

It's closer to cleaning your desk before someone walks into the room.