Welcome to Mastery, Safety, and Capstone, the ninth and final module of the course. You’ve learned the full Git and GitHub workflow — committing, branching, collaborating, automating. This module sharpens that knowledge into genuine fluency: making Git fit your hands, keeping your repositories secure and clean, and knowing exactly what to do when something goes wrong. Then you’ll prove it all with a capstone.

You’ll start with configuration mastery — config levels, aliases, .gitattributes, and an introduction to hooks — so Git works the way you want. Then you’ll cover security and hygiene: signing commits so people can trust they came from you, and handling secrets safely (and what to do if one slips in). You’ll build a troubleshooting playbook of the mistakes everyone makes and the exact commands that fix them. Finally, the two-part capstone brings the whole course together: first you’ll build and publish an original project repository from scratch, then you’ll simulate a full team collaboration — branches, pull requests, a real merge conflict, and a tagged release.

Every command here was run for real. Finish strong: start with Lesson 1 on configuration mastery, and by the end of this module you’ll have a project — and a skill set — you can be proud of.