On the Visualize tab, you can just drag the .hlt file onto the page to see it. There was a local visualizer, but we scrapped it to focus on a single implementation.
The devs are actively monitoring the site's forums and you might want to take this there.
This also makes it difficult to automate. Similarly, maybe I would like to automatically submit my new bot when I do a commit or a push, but the Submit button uses Javascript which makes this unnecessarily difficult. (At least for me.)
The devs are actively monitoring the site's forums and you might want to take this there.