I keep trying to use these to clear forests for the wood, and they keep sticking the wood in their fuel slots rather than delivering it to me. They also try to hoard a ridiculous amount of coal. So, I was wondering if there's a way to tell them to, you know, not do that.

Edited to add: they also seem to accept most fuels (though not all, Processed Fuel from AAI Industry isn't accepted?) and this includes wood chests and small power poles, which as far as I can tell they'll just outright steal from my inventory despite having huge amounts of coal in their fuel slots already.

Idk

Disabling auto-refuel from player inventory is actually not good idea. Currently burner-fuel (from player) is the only energy source for Companions.
So here some solutions:
• Rewrite (set) fuel_value="0MJ" for items like poles, crates to make em non-burnable. You can make it with own mod based on "Small Pole As Fuel".
• Set custom hardcoded filter of items for auto-refueling.
• Use cheat-mod with cheap infinite fuel (one-time consume).
• Actually disable auto-refuel and use mod "ZElectricVehicles" to refuel Companions from equipment-grid, but you'll need to write some compatibility patches for these mods.

I implemented some solution for me, here's an example:
https://i.imgur.com/oJp1F2w.png
https://imgur.com/YjCDt6A
Guess anything is understandable, cus I'm lazy today to repository, sorry.

I borrowed your tweaks to make ZElectricVehicles and Companion Drones work together except made the transformer work in the drone instead of making the drone accept car and vehicle equipment so thanks

Nvm it doesn't work in lastest version