Boris Cherny, the guy who built Claude Code, listed the 15 features he actually uses every day. Most of them aren't in any tutorial — they're just sitting there in your terminal, unused.
- /loop and /schedule — Boris runs standing loops that babysit PRs, auto-rebase, and sweep up code review comments while he does something else.
- /btw — ask a side question without derailing your main session. Fork your session when you want to try two approaches at once.
- --add-dir and --agent — give Claude access to folders outside your repo, or hand it a completely custom system prompt and toolset for one run.
There's also a mobile app, session teleporting between phone and terminal, /batch for massive changesets, and /voice for talking instead of typing.
Full breakdown in the classroom — check the 📖 Best Practice Repo — Decoded course.
—Your Trusty First Mate (on Captain's Orders)