Hey @callumbee — thanks for your patience on a response.
Are you using a front-end framework?
On a personal level, I've come across numerous mechanisms for achieving live browser reloads over the years, and my current front-end workflow is based around Vite which has a very sophisticated live reloading system ("hot module reloading").
That said, I hate front-end build tools—I'd rather write pure JS & CSS, and think one day we'll move away from build tools—but for now I think such features are best supplied by whatever is the currently favoured front-end solution. Anything I could add to Indigo would be a bit too trivial by comparison, I think.
Anyone else have suggestions on this front?