This will eventually be a list of as much Celeste tech as possible. Being fully comprehensive is impossible, but I aim to get as close as possible. Or maybe I aim to make 4 pages for this and abandon the idea immediately. Who's to say.
The word tech is used to describe enough different things that giving it a rigid definition would be counter-productive. The contents of this list are, for the most part, just inputs or moves that are common enough to have names.