To share an exercise you have written, you will first need to create an account on the exercise repository server: https://cloudcoder.org/repo/register.

In CloudCoder, select a course and click the Problems button in the upper left. Select an exercise you want to share. Note that the exercise must have a license other than NOT_REDISTRIBUTABLE. Then, click Share. Enter your exercise repository username and password. Finally, click the Share exercise button. You should receive a message indicating that your exercise was successfully shared. If you see an error message, it usually means that the exercise has already been shared.