It is made possible by my code. But I would emphasize that the code is quite trivial. It's literally just populating a prompt template with the output of a previous template-- simple string manipulation. I never could understand why anyone would want to use Langchain for that sort of thing.
> where each chunk can go through a multi-stage process, in which the output of the first stage is passed into another prompt for the next stage
Is it made possible by your custom code or is this that now OpenAI offers off of the shelf via their API?
If the latter, that would partially replace LangChain for simple pipelines.