The syntax looks a bit too verbose for me. And function names like "read" and "write" are confusing too, given that "read" function isn't made for reading values. Cannot we use a single function for binding, like this (and name it "bind")?

    let counter = proxy({ count: 0 });
    bind('.counter', (el) => el.textContent = counter.count);
    counter.count++; // Queues DOM update

> Mador is distributed as an ES module.

This means it cannot be used on a page opened from disk, and the user needs to set up a HTTP server which is time-consuming and distracting. And you cannot distribute an app as as HTML file.