Design the contract first
An API is a product boundary. Define semantics, error behavior and versioning expectations before implementation details dominate the design.
Make ownership explicit
Every API should have a clear owner, lifecycle and reliability expectation. Ambiguous ownership becomes operational debt.
The knowisly principleChoose architecture based on the problem you need to solve, not the technology you happen to have available.
Plan for change
Compatibility rules, deprecation paths and observability allow APIs to evolve without surprising consumers.
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