What is novel code?
1. LLM's would suck at coming up with new algorithms.
2. I wouldn't let an LLM decide how to structure my code. Interfaces, module boundaries etc
Other than that, given the right context (the sdk doc for a unique hardware for eg) and a well organised codebase explained using CLAUDE.Md they work pretty well in filling out implementations. Just need to resist the temptation to prompt while the actual typing would take seconds.