> For the complete documentation index, see [llms.txt](https://docs.builtoncement.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.builtoncement.com/getting-started/beginner-tutorial/part-2-extending-a-project.md).

# Part 3: Extending a Project

## FIXME - Coming Soon

* Defining Hooks
* Defining Interfaces
* Creating Plugins