Im hacking some really dumb code this week & just tried to get StarCoder.cpp to give me some help, but I don't have any idea how to prompt it to work with code

Im hacking some really dumb code this week & just tried to get StarCoder.cpp to give me some help, but I don't have any idea how to prompt it to work with code I already have. I was really surprised that all the HuggingFace stuff needed an account. I didn't have any faith my data would stay local, I didn't understand what that was all for. Which sucks a bit because StarCoder seems to have a fairly friendly vscode extension, Im just too scared to use it. I think maybe the trick is to just write code comments & ask for help in them? The vscode extension seems to just upload the file, wrapping everything before your cursor in {start token}/* your code here */{end token}. I'm obviously a total newb here, but new a little tiny bit about LLM, how they are tokenizing systems. It still stuns me a bit seeing that these systems absolutely have the most minimal ability to capture context/hints from the rest of the project, from typescript definitions.