Diff

ELI5 — The Vibe Check

A diff shows you exactly what changed between two versions of your code. Lines that were added show up in green with a +, and lines that were removed show up in red with a -. It's like a 'spot the difference' game for code.

Real Talk

A diff (short for difference) is a comparison between two states of a file or set of files. Git diff shows line-by-line changes in unified diff format. It's used for code review, debugging, and understanding changes.

Show Me The Code

git diff                # unstaged changes
git diff --staged       # staged changes
git diff main..feature  # between branches

When You'll Hear This

"Check the diff before committing." / "The diff is huge — can you break this into smaller PRs?"