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MODULE 02 · 5 MIN READ
Prove the universes are separate
Commit a file on idea, then jump back to main — and watch the file vanish from the working directory. It isn't deleted; it lives in the other universe.
Switching branches rewrites your folder to match the universe you're standing in — the same mechanic as yesterday's time travel, but between live timelines instead of old snapshots.
git bash
$ touch experiment.txt
$ git add .
$ git commit -m "Try a wild idea"
$ git switch main
Switched to branch 'main'
$ ls
notes.txt
COMMIT GRAPH · on branch main
practice terminal — you cannot break it
type help for commandsa tiny simulated laptop — your Day 1 repo is preloaded.
$
// try: touch experiment.txt → git add . → git commit -m "Try a wild idea" → git switch main → ls → git switch idea