I don't think the Interdict of Merlin applies to instructions given by Harry to Hermione about Patronus 2.0. First, I'm not sure Patronus 2.0 would be considered powerful enough to fall under the Interdict. Then, it's not really instructions to cast the spell that Harry is giving - the formula of the spell itself, "Expecto Patronum" isn't included. And finally, Harry didn't write full instructions, but a puzzle that would help Hermione solve the problem herself, like Harry did.
This is a new thread to discuss Eliezer Yudkowsky’s Harry Potter and the Methods of Rationality and anything related to it. This thread is intended for discussing chapter 113.
There is a site dedicated to the story at hpmor.com, which is now the place to go to find the authors notes and all sorts of other goodies. AdeleneDawner has kept an archive of Author’s Notes. (This goes up to the notes for chapter 76, and is now not updating. The authors notes from chapter 77 onwards are on hpmor.com.)
IMPORTANT -- From the end of chapter 113: