Examples

Six runnable examples, from plain narrowing to folding multi-tag failures. Each page embeds the actual source of a file in examples/ — the same code CI runs via yarn examples — so what you read here is what executes.

1. Parse untrusted input — the simple layer: ok / bad + narrowing.
2. Form validation — several failure modes, dispatched with matchBad.
3. Wrap a throwing API — turn a hidden exception into an explicit Bad.
4. Domain operation — valueless success and the unwrap* toolkit.
5. Result chaining — map and match on the wrapper.
6. Fold failures — match's per-reason bad map.