Project history as snapshots, not a "final-2" folder

Git remembers snapshots of a folder. add selects, commit records. It's not "save the file".

A branch is a movable pointer to a commit. A feature lives separately, then gets merged.

A remote repository is one more copy of the history. origin is usually GitHub. push sends, pull fetches.

log shows commits. diff shows what changed. Without them you push blind.

restore discards edits in a file. revert adds a reverse commit. reset --hard on a shared branch — no.

You urgently need to switch branches but it's too early to commit — stash. You'll get it back later.

node_modules, .env and the build don't go into history. Ignore before add.

A branch, a push, a request to merge into main. Review happens before the merge, not after.