Ask HN: How to organize research papers for reading

I recently read somewhere that a paper is a small part of a long on-going conversation. I found this description aptly.

To comprehend the latest paper, I frequently find it necessary to grasp the context provided by its citations. All pertinent papers collectively shape a Directed Acyclic Graph.

Is there a tool available that would enable me to organize papers in a DAG, allowing me to formulate a structured reading plan? Currently, my PDFs are scattered across different locations, and I essentially have to rely on memory to recall the dependencies between papers.