What is a node

[placeholder] Body content for this entry will be written by the copy chat. The entry covers the basic definition of a node: the fundamental building block of every Tree project.

A node represents a single piece of work, a milestone, or a structural marker. Nodes have a status (locked, available, in-progress, complete), prerequisites (other nodes that must finish first), and children (nodes they unlock when they complete).

The rest of the wiki uses the word "node" as defined here. When other entries talk about edges, prerequisites, or fog of war, those concepts always refer to relationships between nodes.