Built a small thing this week that I'm weirdly happy with.
When I'm working inside a client's system, a little icon quietly appears in the corner of their dashboard. It's not there any other time. When I'm actually in, it glows, and the second I'm out, it disappears. If they hover it, it tells them plainly what's happening: maintenance is being done right now, by us.
The reason I like it: one of the quiet worries clients have with this kind of work is "how do I even know when someone's in my system?" Instead of making them ask, the system just tells them, in a way that doesn't interrupt whatever they're doing. Presence you can see, that turns itself off when it's not relevant.
Cost almost nothing to build and it's done more for trust than anything I've said on a sales call. Anyone else build these little transparency touches into what you hand clients?