Contracts reduce ambiguity.

Ambiguity in systems integration acts as debt. It forces downstream processes to guess the intent of upstream outputs.

A structured contract, such as a validated schema, makes exchange predictable. It declares exactly what is promised and what is required.

When the interface is clean, the implementation can change without breaking the system. Clear expectations prevent silent failures.

What this changes in practice: define input and output structures as code contracts before writing integration logic.