This is an API that adds a system where nodes have their own proper "health" system, complete with cracking visuals. Each node has a total of 4 different states, including the fully repaired state. It does little on its own though; the most you'll get is TNT mod compatability and a test hammer that left-clicks to damage nodes and right-clicks to repair nodes.
Although there are no hard dependencies, there is an optional dependency on the tnt mod. When it is active, TNT will damage nodes that are outside of the destruction radius.