It's pretty simple. I write out a detailed spec, similar to what I'd put in Linear/JIRA for a bright intern. I give it to Claude Code, and it starts writing code, proposing the edits to me. They're usually decent, and when they aren't I reject the proposed edits and give it feedback. After a few minutes the work is done, typically faster than I could've typed out the code by hand (even including writing the spec).

God help you for complex code though, it will spin in circles of failing to debug.