For a page called "basic endgame theory", a sufficient definition for sente might be something like "a move that the opponent answered or will surely answer".
If the rest of the important bits about mutual damage and the true nature of sente were on their own pages, the readability of this page would improve markedly.
You probably end with one page about playing the endgame and one page about counting in the endgame. I thought for a minute that a separate introduction to miai counting page would be better but ended up deleting the separate page again. Just try...