Type inference

Each transform describes both a runtime operation and its output type. pipe carries that output into the next stage.

const toAccount = pipe(
  rename({account_id: 'id'}),
  defaults({status: 'pending' as const}),
  normalize({balance: 'number'}),
);

const account = toAccount({account_id: 1, balance: '4.50'});
// {
//   id: number;
//   status: 'pending';
//   balance: number | null;
// }

Use as const when a fallback should retain a literal type instead of widening to string or number.

The exported Transform type is useful when defining reusable custom steps. Typed pipe overloads currently cover one through four transforms.