Decide that the planning baseline (Business Case, Stakeholder Analysis, Project Plan, milestones, governance, traceability) is complete and reviewed, so that code may be planned.
Decide that the repository can be installed, tested and documented by a participant who has never seen it.
Decide that lecture step 1 works: a date goes in and a list of 100 songs comes out.
Decide that lecture step 2 works: the program can open a YouTube Music session from browser.json and reports the library playlists.
Decide that lecture step 3 works: a private playlist named {date} Billboard 100 is created once and never duplicated.
Decide that lecture step 4 works: every found song is added to the playlist and a failure never stops the run.
Decide that the project is finished: the wiki explains what was learned in each lecture step in three languages and the repository is ready to share.