Implement presentation-layer filtering for streaming code to blur sensitive data

We were doing a live coding stream recently and it got us thinking about how easy it is for credentials to show up on screen without meaning to. Most advice focuses on obvious things like not opening a .env file on stream. But in reality, the risk often comes from small moments during normal workflows. Some examples we ran into: • Browser dashboards that automatically reveal API keys when the page loads • Terminal history showing commands with tokens or auth headers • Debug logs printing environment variables • Autofill revealing credentials in login forms • Configuration pages briefly showing tokens while navigating around When you're streaming or screen sharing, even a few seconds is enough time for someone to pause the video or grab a screenshot. What stood out to us is that most of these situations happen without anyone trying to expose anything sensitive. A lot of tools simply display credentials by default once you're logged in. A few habits we’ve started following since then: 1. Avoid opening credential dashboards during streams 2. Never access .env or local config files on screen 3. Use restricted or demo API keys whenever possible 4. Assume anything visible on screen could be captured We’ve also been experimenting with presentation-layer filtering, where known secret patterns get blurred before they appear on the captured screen output. It helps reduce the need to constantly think about hiding things during a live demo. Curious how others handle this. If you stream coding sessions, teach programming, or run live demos, what safeguards do you use to avoid credential exposure?