The ninth week essentially consisted of integrating a new functionality to upload relevant PDF files into a vector store for improved responses. 

This allows the system to prioritize information from stored PDFs, falling back on internet searches only if the information retrieved from the vector store is irrelevant. The upload feature is restricted to certain admin users at Reach for Change.

Moreover, the option of copying the response or downloading a PDF of the response from the interview scripter and survey generator was also added.