Yes, I have seen several adjacent approaches. Microsoft Huabu explores spatial interaction around research materials, while LLM Canvas and tldraw’s branching-chat experiments explore visual conversation trees. Many workflow canvases also use nodes and edges, but they usually represent execution pipelines. The specific interaction I am testing is more narrowly about context: an edge changes what the model receives, while removing it keeps the earlier work visible but excludes it from the next inference. I would be interested in other projects I may have missed.