Cards, tasks and details
Cards hold the work. Tasks hang off a card with a status, an owner and a due date.
A card has a title, a Markdown body (type @ to mention someone or link another card), an owner, a status and a track. Open one and the side panel shows its details, history and notes.
Tasks
A task is a child card: it hangs off its parent on the same stop and track and carries a small form: status (To do, Doing, Blocked, Done), owner, due date and notes. Add one from the card's menu or with the + under the card. Project settings lets you rename what tasks are called.
Details and links
Any card can carry custom details (label and value) and system or character details for things that need a fuller form. Cards link to each other with @; the Linked panel shows what points where. Archived cards leave the board but can be restored from the Archive.