The original idea of open source or rather free software is to bmactually "own" the code in a way that you can modify it to your needs. Guess this is not the case here, then. But I guess also most of android falls in that category that by now. I guess we should be using better,more attributes when describing open source

Brightscript could have been worse!

And much, much better, as well

Roku remotes are sophisticated devices. There are many models, so features vary, but among the possible features are 3.5mm audio output, Bluetooth audio, voice command input, Wi-Fi, infrared, battery charger and other things. Clearly a substantial MCU is present and thus, an RTOS.

Voice command handling, I would suspect.

to spy on you

Get an AI to transcribe the videos for you and then ask it to create a manual from the transcription.

You can probably do it with a keyboard paired to a server/RPi that emits the keystrokes to the Roku ECP API, if having that second device is acceptable.

This might be possible now. I think the better option is having a hardware device that acts a bridge between a bluetooth keyboard and the Roku.

On my rokus, I am able to use my phone as a remote via the roku app. This includes typing on mobile via my phone's keyboard. Makes logging into things much easier.