supervisionWeb — feasibility ladder

Each rung adds one capability. Run them in order; a failure localises to that layer.

• A USB claim — cleared via usb-probe.html
• B device info (GetValue) — no Trust prompt
• C pair + StartSession SSL — taps Trust on first run
• D browse installed apps — StartService round-trip
• E MCInstall GetCloudConfiguration — read-only

Rung B Rung C Rung D Rung E

(ready)