The US-Israel strikes on Iran risk a repeat of the 2022 energy shock that forced power bills up by more than 40%, sent Australian businesses to the wall and forced governments to spend billions on power bill subsidies.
VSA and “Package by Feature” are patterns for organizing code around features and each slice/package should contain “all layers” the feature needs to operate. In this regard, it’s quite similar to classical Modular Design, except for the scope. There are no hard rules, but by intuition I would say that “features” are usually smaller than “processes” (on which modules should be based). But in practice I see developers organise slices into groups, which then are similar to modules.
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something you expect to have a few lines, but if it responds with
Centralized invariants of business logic. If two modules are found to keep the same invariant, they should be merged. It’s difficult to keep invariants in sync between modules.