Interesting, after years of software-development I arrived at almost the same pattern:

* [feature] -> a new feature, can be incomplete, but should be a contained unit of work that's usable to the enduser in some way.

* [code] -> everything that improves the code, could be refactoring, library-updates or preparations for a feature

* [bugfix] -> minimal commit only for fixing a bug, should (almost) always include a test to reproduce the bug.

Sometimes I also use:

* [build] -> for build-improvements

* [performance] -> for performance-improvements