Has anyone written a script to preload chat gpt threads with very large context info. Eg multiple pdfs + code + docs? 

Or do I have to write it now lol

Someone have! I had a convo here about it.

For PDFs, take chatpdf.com for a spin. I read a lot of long reference material, this helps.

GPT-4 context is like 8k tokens, not enough for much. The cool kids these days dump everything into a vector database, and then use terms from the prompt to max out the context window with relevant snippets of code and text etc, but that approach is still pretty limited.

Searchcaster