I can see a problem with automatic detection a period in terms of spacing. If you always make the space larger after the period then things get weird when you say something like “Mr. Musk is a supervilian”. Should it make the bigger space after Mr. and how would it know? Yes you could build in a list of hot words not…

Why would it matter if it is waxing? Waxing just means that it in the cycle from new moon to full moon. Should that be gibbous (as in more than half full)?