I should have posted that, it’s not easy to find. You have to go into teams and join “Team Gold”. Once joined, go to workouts, scroll down to teams and check team gold. I think @windwarrior put in on here (sorry if I’m wrong on that). I did the baseline test. The workouts have links to the trainingpeaks articles where the protocol is discussed in more detail.
I think I found it in the TH progression thread on here. Threshold Progression
I wish there was a way to save it to your workout library. I marked it as a favorite, but it won’t show up (because it’s a custom workout?). You have to go back into team gold to schedule it every time.