I don't think it's a failure of the prompting, but of the tool itself. It just isn't good for any higher-level tasks, and those I know how to do anyway. It's good for menial API work, as a sibling comment says, and using it I can avoid reading API docs, but that's about it.

I tried to have it rewrite in Go a small Python script (a hundred or so lines) that I wrote, and it basically refused, saying "here's the start, you write the rest now". As others said, if it went away it'd be a minor inconvenience of me having to read a bit more documentation.