It takes some practice to get good using them. I use it as a sophisticated autocomplete. For example, if I'm building an api client layer in a web frontend, I might have `fooApi.ts`, `mockFooApi.ts`, and `barApi.ts`. instead of writing `mockBarApi.ts`, something that might take 5 - 15 minutes, I can feed those 3 existing files into context, and a few seconds and pennies later I have a nearly perfect file ready for review.

For any semi novel development I want to write it myself to establish the patterns I like and get an understanding of what I'm building. It's the boring stuff I hand over to Claude.