Show HN: I built a mental map learning interface to learn anything faster (github.com)

An open-source, visual interface for LLMs that forces output into a graph structure (React Flow + Dagre). Instead of linear text, every response is a node. I tweaked the system prompt to be purely Socratic...it asks questions to help you expand the graph yourself. Includes browser-local session persistence and image generation for complex concepts.

Stack: Next.js 16, React Flow, Gemini 3 Flash. Privacy: 100% local storage (no signup/database). Cost: Free (Open Source). Demo: https://nodenest-blond.vercel.app/