Add Oh My Git! reference page

AUDIT_MANIFEST.json

@@ -583,5 +583,15 @@
       "security",
       "reference"
     ]
+  },
+  "training/references/oh-my-git.md": {
+    "silo": "2890",
+    "growth": "tree",
+    "tags": [
+      "git",
+      "version-control",
+      "game",
+      "interactive"
+    ]
   }
 }

training/references/oh-my-git.md

@@ -0,0 +1,54 @@
+---
+title: "Oh My Git! — Learn Git Through Gameplay"
+growth: tree
+last_verified: 2026-05-29
+freshness: seasonal
+silo: 2890
+prerequisites: []
+related:
+  - first-technical-resources
+  - book-of-secret-knowledge
+tags: [git, version-control, game, interactive, programming, beginner]
+---
+
+# Oh My Git! — Learn Git Through Gameplay
+
+**Source:** <https://ohmygit.org> (open source, free download)
+
+An open-source game that teaches Git by letting you *play* with it. Instead of reading man pages or memorizing commands, you watch Git's internal structures update in real time as you make moves.
+
+## Why This Matters for Team 2890
+
+Every student who touches code on this team needs to know Git — we use Gitea for version control, and bad Git habits (force-pushing to main, confused merges, lost commits) cause real problems. But Git is famously unintuitive when you're learning it from a terminal.
+
+Oh My Git! solves this by making the abstract visible. You can *see* what a branch is, what a merge does, and what happens when things go wrong.
+
+## Features
+
+- **Real-time visualization** — Watch commits, branches, and remotes update as you act. The "ah-ha" moment for understanding branches happens fast when you can see them
+- **Playing card interface** — Each Git command is a card with an icon, name, and short description. Learn by doing, not by memorizing
+- **Built-in terminal** — Real Git is running under the hood. Advanced or curious players can type any Git command directly
+- **Collaboration levels** — Levels that teach remotes, pulling, pushing, and team workflows with multiple repositories
+
+## Who Should Play This
+
+- **New programmers** who haven't used Git before (start here before touching Gitea)
+- **Anyone confused by branches** — the visualization makes it click
+- **Students moving to team repos** — the collaboration levels map directly to our workflow
+
+## How to Get It
+
+Download free from the [itch.io page](https://blinry.itch.io/oh-my-git) — available for Linux, macOS, and Windows.
+
+## After Oh My Git!
+
+Once you're comfortable with the basics:
+- Move on to real Git in the terminal — the commands are the same, just no cards
+- Read [[book-of-secret-knowledge|The Book of Secret Knowledge]] for deeper CLI and version control references
+- Set up your Gitea account and start contributing to team code
+
+## Notes
+
+- The game hasn't been actively updated since 2021, but Git fundamentals haven't changed
+- It runs a real Git instance internally — anything you learn transfers directly
+- Works offline — no internet needed after download