Build a foundation that can absorb the next change

A useful foundation fits the product that exists today and leaves sensible room for likely changes. It does not require predicting every future feature.

Keep boundaries clear around areas that change for different reasons. Prefer explicit contracts and simple shared patterns over a generalized framework without a current need.

Review the cost of flexibility as well as its benefit. The best structure is one the team can understand, operate, and adapt as evidence arrives.