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Learn Git, one concept at a time

Each lesson pairs a clear explanation with an interactive visualization you can play, step, and run in the visualizer.

  1. 01Beginner

    Git fundamentals

    The mental model: repository, working directory, staging area, commits, branches, and HEAD.

    7 min
  2. 02Beginner

    The staging area

    What git add really does, why the staged version is a snapshot, and how partial staging works.

    6 min
  3. 03Beginner

    Commits

    How a commit object is built, how it links to its parent, and how the branch and HEAD move.

    6 min
  4. 04Beginner

    Branches

    Branches are movable pointers. Learn how switching, diverging, and deleting work.

    7 min
  5. 05Intermediate

    HEAD

    What HEAD points at, how checkout and switch move it, and what detached HEAD means.

    5 min
  6. 06Intermediate

    Merging

    Fast-forward vs three-way merges, merge commits, and where conflicts come from.

    8 min
  7. 07Advanced

    Rebasing

    Replay commits onto a new base for linear history — and why rewriting shared history is risky.

    8 min
  8. 08Intermediate

    Conflicts

    Why conflicts happen, how to read markers, and how to complete the merge.

    6 min
  9. 09Intermediate

    Remotes

    Local vs remote, remote-tracking branches, and fetch, pull, and push.

    7 min
  10. 10Intermediate

    Pull requests

    The full lifecycle from issue to merged, reviewed change on a protected main.

    8 min