model, or scheduler, see “New Pipeline/Model” and “New scheduler” issues. For this contribution, please have a look at Design Philosophy.
As said before, all contributions are valuable to the community.
In the following, we will explain each contribution a bit more in detail.
For all contributions 4.-9. you will need to open a PR. It is explained in detail how to do so in Opening a pull requst

1. Asking and answering questions on the Diffusers