This is really cool. Sure, similar tools have existed for a while, but Hound looks far simpler to setup and use than previous tools.
However, it would be nice to have this optionally run on every commit rather than only on pull requests. For my own personal projects, I obviously don't submit pull requests to myself, but I would like to have Hound double-check my code for me.
Not sure it should be obvious you don't. Pull requests are especially well-suited for a team environment, but using PRs in a solo project can still give a higher level of structure to the progression of your code. Gives you an opportunity to explain why you're doing what you're doing.
Agreed. This approach is especially nice for situations where you open up the code at a later point, so that people can see the historic progression in more ways than just the Git history. https://github.com/thoughtbot/hound/pull/1
However, it would be nice to have this optionally run on every commit rather than only on pull requests. For my own personal projects, I obviously don't submit pull requests to myself, but I would like to have Hound double-check my code for me.