> Now, you could imagine an interface where you interactively select the pieces of the diff when committing There's no need to imagine -- git-gui and git-cola

> Now, you could imagine an interface where you interactively select the pieces of the diff when committing There's no need to imagine -- git-gui and git-cola can do this. http://cola.tuxfamily.org/ http://cola.tuxfamily.org/ Click on a modified file, select specific lines from the diff, right-click, and click on "stage selected lines".