These pages explain the model behind the tool.
Static answers "what is connected". Runtime answers "what actually ran".
Why project-wide analysis catches what file-local tools cannot.
How health, maintainability, and refactor targets are computed.
The four detection modes and when to use each.
What Fallow considers reachable and why.
If you are new to Fallow, start with Static vs runtime intelligence and Fallow vs linters.