I do something similar, merely writing out the function signatures i want in code. The more concrete of the idea i have in my head the more i outline, outline tests, etc.

However this is far less vibe coding and more actual work with an LLM imo.

Overall i'm not finding much value in vibe coding. The LLM will "create value" that quickly starts to become an albatross of edge cases and unreviewed code. The bugs will work their way in and prevent the LLM from making progress, and then i have to dig in to find the sanity - which is especially difficult when the LLM dug that far.

Yeah I'm nowhere near ready to loosen the leash. Show me a long-running agent that can get within 90% of its goal, then I'll be convinced. But right now we barely even have the tools to properly evaluate such agents.