... lets you create a sticky post in a different design that is only on the blog homepage, and there at the top.
Save the blog-start.html in your system/layout folder and create a content/shared/special1stpost.md with the following content:
---
Title: Special 1st post
Layout: special1stpost
Tag: Example, Special 1st post
---
< Your content goes here. >
Thank you for your effort, but this is not yet ready to become an extension. That's why I've put it here as a gist.