3. Core Daily Workflow

# Check what's changed
git status                   # overview
git diff                     # unstaged changes (working dir vs staging)
git diff --staged            # staged changes (staging vs last commit)

# Stage changes
git add file.txt             # stage one file
git add src/                 # stage a folder
git add -p                   # interactive: stage hunks (partial file staging)
git add .                    # stage everything (use carefully)

# Commit
git commit -m "feat: add login endpoint"
git commit                   # opens editor for multi-line message
git commit --amend           # rewrite the LAST commit (message + content)
git commit --amend --no-edit # amend content, keep message

# View history
git log                      # full log
git log --oneline --graph --all   # compact visual graph
git log -p                   # log + diffs
git log --author="Alice"     # filter by author
git log --since="2 weeks ago"
git log -- path/to/file      # history of one file

# Show a commit
git show <commit-hash>
git show HEAD~2              # 2 commits before HEAD

Good commit messages (Conventional Commits)

<type>(<scope>): <short summary>

[optional body]

[optional footer: BREAKING CHANGE, Closes #123]

Types: feat fix docs style refactor test chore

feat(auth): add JWT refresh token support
fix(cart): prevent duplicate item on re-add
docs: update API setup instructions

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