Use cases

Every door, one engine.

Each page here is a different door into the same room. Behind all of them is one engine: Ayven asks the person who owes the work, chases when they go quiet — changing approach instead of repeating herself — routes around whoever's out, and treats something as done only when the linked tracker says so. One atom of that engine is enough to walk in; the whole thing composes behind you once you're inside. Pick the door that sounds like your week.