How do you handle huge technical docs? Looking for tools/workflows that help

Curious what tools or workflows folks here are using to deal with long technical docs – stuff like API documentation, white papers, specs, academic research, etc.

I’ve been neck-deep in an LLM integration project lately, pulling together pieces from multiple frameworks/vendors, and it’s been… painful. I’m spending way too much time manually scanning through 50+ page PDFs just to find a config setting, implementation detail, or some obscure architecture note buried halfway down the doc. CTRL+F only gets me so far.

Anyone here built custom pipelines or chained tools to make this easier? Anyone using LangChain, RAG setups, or embedding + vector DBs to query docs directly? I’d love to streamline this because accuracy matters a ton with these technical docs, and wasting hours digging through them is killing me.

Would love to hear what’s working for you. Thanks in advance!