Version 2.0 is a complete rewrite of the way actions work. Commands are now placed in a queue to await processing, this prevents some game behaviors from blocking tasks, and most importantly, allows multiplayer to function properly!

Version 1.12 fixes the circumstance where an item in hand would be completely absorbed by existing stacks, but this would block a command from completing due to the game keeping the dead stack alive until cleanup.

Version 1.11 upgrades item equipping to always equip a full stack.
Fixed an error caused by some of the game's items having invalid build options.

Updated description

Version 1.10 adds the ability for the build key to equip whatever is necessary to build a copy of what you're looking at. It will equip cables or pipes and the offhand tools necessary to merge them, as well as any kits or buildables you have in your inventory. Looking at completed walls will equip the matching wall kit, for example.

Version 1.9 adds crowbar-ing with the build key to force open doors, and the covers on the APC.
Configure key can equip wrench when it can do something your hands can't (turning solar panels).
Unbuild will trigger for non-structures like deconstructable crates.

General bug fixes, some features should have slightly more precise detection.

Version 1.8 fixes a whole host of bugs and weird behaviors.

Screwdriver was equipping when it could be placed into a slot.

Mountable containers like crates & portable tanks were recognizing the player as a valid mounting point, causing erroneous build/unbuild triggers and wrenches to be dumped into the world.

Protections placed against recognizing dragged crates as valid places to put items.

Don't try to equip stuff into slots containing dragged items.

Version 1.7 fixes an issue where hand swaps were not being performed in the case that one hand was empty

Thanks to Identifier

Version 1.6 prevents actions from triggering when the code editor is open

Thanks to T_BENZIN for noticing.

Version 1.5 fixes the configure key not working from a cold boot of the game, it was only working if reloaded mid-game. "Works on my machine!"