Git Courier — SSH vs HTTPS

An interactive browser-based game that teaches you how Git protocols actually work. Play through concept cards and quizzes to build a solid mental model of SSH, HTTPS, and the GitHub CLI.

Play it live →

What you'll learn

• Why Git needs protocols at all — local repos, remotes, and what origin means
• How SSH key authentication works (and why your private key never leaves your machine)
• Why HTTPS with a token is safe despite "sending credentials over the wire"
• When to use SSH vs HTTPS (spoiler: CI/CD has a clear winner)
• How gh auth login works under the hood
• The difference between git transport layers and workflow tools like gh

Topics covered

Round	Type	Subject
1	Concept	Local repos, remotes, and origin
2	Concept	SSH key pairs & challenge-response auth
3	Quiz	SSH basics
4	Concept	HTTPS & TLS handshake
5	Quiz	HTTPS & token security
6	Sort game	SSH vs HTTPS properties
7–8	Concept + Quiz	CI/CD & firewall considerations
9–10	Concept + Quiz	How gh CLI uses OAuth
11	Quiz	Putting it all together

Running locally

Just open index.html in a browser — no build step, no dependencies.

open index.html

Deploying

Hosted on GitHub Pages from the main branch root. Any push to main updates the live site.