Build a Streaming Gemini Chat in Angular with Signals — Then Ship It on Cloud Run

If you have built a chat UI for a large language model in the last two years, you probably reached for RxJS, an OnPush component, an async pipe, and a BehaviorSubject per piece of state. It worked, but it was a lot of plumbing for what is fundamentally a very simple shape: one string that grows over time . Angular Signals collapse that plumbing into a single primitive. And it turns out that streaming Gemini responses with Signals is one of the cleanest, most satisfying pieces of code you can wri