Let him live

You are already walking past him when you look over your shoulder and say, "The Temple is under attack! Master Shaak Ti's life may be in danger."

Slipping into the Jedi Archives unnoticed and hear Chief Librarian Jocasta Nu instructing other Padawans, "Hurry! Destroy the archives before they get here!"

As you make your way out, you switch on your comlink and pass an order on to Captain Rex: "Captain, I need you to send a squad over to the Archives. They're trying to purge the data."

"At once, Lord Vader."