Git

The backbone of everything else. Learn in layers — don’t jump to worktrees before you’re calm with branch + push.

Starterinit, clone, status, first commit, create branch, remoteEverydaypull, push, fetch, log, switch, stash light, PR flowConflictsmerge/rebase conflicts, abort, small resolutionsForce & historyamend, rebase -i, force-with-lease, reflog recoveryStashstash, pop, apply, named stashes, include untrackedWorktreesparallel branches, agent worktrees, cleanup

Mental model

working tree  →  stage (index)  →  commit  →  remote branch
     ↑                                              │
     └──────────── pull / fetch + merge/rebase ─────┘

Companion tools

• lazygit — TUI for daily git
• delta — readable diffs

Safety rules (tattoo these)

1. Prefer git push --force-with-lease over --force
2. Never force-push main / master / shared release branches
3. reflog is your undo for almost everything local
4. On WSL: keep repos under ~/, not /mnt/c/