A framework for managing and maintaining multi-language pre-commit hooks.
Some out-of-the-box hooks: https://github.com/pre-commit/pre-commit-hooks
A pre-commit is some code that runs before commiting code to do some spot-checking for some basic programming mistakes.
We noticed that when creating a git repo it was not convenient to create pre-commit hooks. Often we resorted to copy/paste to include a set of useful hooks. https://github.com/causes/overcommit is an awesome project, but locked us into ruby and system packages -- which we wanted to avoid.