Custom app with .json file testing

I have a custom app with a custom_field.json file. It works great except I don’t know how to make changes and have it reflected on my development environment. I tried to refresh the browser and/or restart bench but that doesn’t have any effect. The only thing that does work is to commit the changes to git and do a bench update. But that’s silly for every small changes. Any help?

If you have configured supervisor, then after making changes in python or json you need to restart the supervisor.

I’m in developer mode. No supervisor.