I was thinking about the commit mask thing recently but imagining it as a part of Git, or an extension.The project I'm on at the moment is a big legacy codebase that requires a bunch of dev-only code changes for:

- functionality (setting API urls; forcing certain screens to appear; overriding config values that come back from an XHR)

- quality of life (skipping delays; turning sounds off)

It would be great to be able to toggle and mix and match these patches locally without risking committing them. A combination of stashes and branches kind of works, but the ergonomics isn't great, especially when there are conflicts.