APIs should be boring on purpose

An API is a promise to other engineers. The more surprising it is, the more it costs everyone who depends on it. So we aim for boring: predictable shapes, honest errors, and a versioning story that does not bite.

The basics we do not skip

• Clear, documented contracts, ideally generated from the code so they stay honest.
• Stable error shapes, so a client can handle a failure without guessing.
• A deprecation plan before a breaking change, not after.

// A clear, typed response shape
{
  "id": "ord_123",
  "status": "paid",
  "amount": 4200,
  "currency": "usd"
}

None of this is exciting. That is the point. A boring API is one your consumers stop thinking about, and that is the highest compliment an interface can get.