The Agent Loop: How 20 Lines of Swift Turn an API...

A language model can reason about code — it can plan how to fix a bug, suggest a refactoring, or design a feature. But it can't touch the real world. It can't read files, run tests, or check whether its suggestion actually compiles. Without some kind of bridge, every interaction is a dead end: the model suggests something, we copy-paste it into a terminal, paste the result back, the model adjusts, and we do it all over again. We are the loop. The entire point of a coding agent is to close that l