I built a debugger two people can watch at the same time I have lost count of the debugging sessions that went like this. I share my screen, I run the code, and I narrate what it is doing line by line while the other person nods at a video feed. They cannot pause it. They cannot rewind it. They cannot point at a variable and ask what it held two steps ago. So I started building Trace. The short version is Figma, but for debugging. Two people join the same run, watch the same code execute ...