What does ljg-paper-river do?
Paper Reverse Reading: Given a paper, recursively find its criticized and improved predecessor papers (up to 5 layers deep), then find the latest progress after it, telling the story of problem evolution forward from the source. Centered on the problem, use Feynman-style explanations to describe what problem each paper saw and its solution innovation. Use when user shares a paper and wants to understand its intellectual lineage, citation chain, problem evolution, or says 'reverse read', 'paper trace', 'paper lineage', 'paper river', 'paper connects', 'trace back', 'the ins and outs of this paper', 'paper evolution'. Also trigger when user wants to understand how a research problem evolved across multiple papers.