Make sure your project has a CLAUDE.md or CLAUDE.local.md. You can use Claude to help you come up with this. Use Claude to maintain a list of common, simple workflows and reference them in CLAUDE.md. It’s not great yet for large scale work or refactors but it’s getting better month-by-month. It may never be able to do big work in one-shot.
I run tasks in parallel and definitely hit the rate limits.