Why I built ts-match: TypeScript branching in the era of coding agents

TypeScript discriminated unions are one of the nicest parts of the language. They make it easy to model state, events, command results, API responses, agent events, and all kinds of variant-heavy domain logic without giving up type safety. At the beginning, everything usually feels simple. You reach for whatever is most obvious: a switch , an if/else , a lookup object, whatever gets the job done. And honestly, most of the time, that is completely fine. The problem usually comes a few branches la