Multiline Instruction Sensor?

Hi! I’m currently playing around with Google Generative AI in assist. I have added a lot of knowledge into the instructions – that works. Things like my preferences, light configurations and other things, quite a lot of text.

Now, I’d like to use that knowledge in multiple personalities. Different Google Generative AIs. I could just copy + paste, but that makes administration difficult. So I thought of putting all the knowledge into a text file and just include that – how do I do that? Apparently, the file sensor, which isn’t visible to the Voice Assistants anyway, only supports one line. The text sensor is limited to 250 characters and just single line. And I don’t know how to do it with a template variable either.

Please help me find a way to store multiline text outside the instructions field and include it there. Thank you!