I don't want a build pipeline. I want to write some HTML with a script type=module tag in it with some JavaScript, and I want that JavaScript to load the ES modules it depends on using import statements (or dynamic import function calls for lazy loading).
Do you not use CSS preprocessors or remote map files or anything like that... or do you just deal with all of that stuff manually instead of automating it?
What kind of build pipeline do you prefer, or are you saying that you don't want any build pipeline at all?