A Hard Boundary Kills The Inner Life
One of the rules I build software by is: constraints outside, freedom inside. The conditions belong at the edge. What happens inside is then allowed to be direct. No function has to defend itself against its own callers, because what comes in was already decided at the boundary. The boundary is there so that the inside can be free. With people it turns over. What the boundary does in code It says what may cross. Nothing else. ...