The README runs its own commands

Your install docs have a code block, a screenshot of the expected output, and a paragraph apologizing that the screenshot is from two versions ago.

Replace all three with an iframe: a terminal URL carrying ?cmd= with the base64-encoded install command and &readonly=true. The reader watches the command actually execute in a real shell: live output, real exit code, no typing allowed. If the install behaves differently this week, the doc shows this week's behavior, because it isn't a recording of anything.

Screenshots describe what a command did once. The embedded terminal shows what it does now.

The code block runs; the screenshot doesn't.