No private space existed. Planning happened across Notion, personal notes, and calendar, all disconnected from the actual pipeline. The Pipeline showed 17 people's work. There was no way to think before broadcasting.
Den is a private, incognito workstation inside the system. Tasks assigned to you, @mentions, personal cards, and cards you're collaborating on all flow into your Den inbox. You decide which 3 to commit to. You lock them as your Daily Scrum and broadcast to the team. The workspace stays yours: Excel, Word, calendar, sticky notes, reminders, all inside Den, no app switching.