Who's Responsible?
Design by Contract doesn't just catch bugs — it tells you who is responsible when something breaks.
Contracts make it clear:
- Preconditions must be satisfied by the caller
- Postconditions and invariants must be upheld by the callee
If a contract fails, the blame isn't vague — it's built into the system.
Visual Flow
Design by Contract doesn't just help catch errors — it helps explain them. It tells you not just what broke, but who needs to fix it.