doctor

doctor reports whether the current environment can capture screens and emit input.

ferrisgrid doctor

Options

Option	Purpose
--output-dir <path>	Create/check a specific FerrisGrid output directory. Defaults to .ferrisgrid.
--backend <name>	Select capture/input backends.

It prints:

• OS
• capture backend status
• input backend capabilities
• output directory
• discovered screens
• ffmpeg availability

Run this before an agent workflow, especially after changing permissions, backends, displays, or Docker workspace settings.

On Windows, doctor --backend native-windows verifies display discovery and reports mouse/keyboard capability. Run it from an unlocked interactive desktop. Input to an elevated application or the secure desktop can still be rejected at execution time by Windows integrity isolation.