JarvisHub: 26 Authors Propose the Canvas as an Agent's External Memory, Action Space and Project State All at Once

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JarvisHub (arXiv 2607.23588, submitted July 26, 95 upvotes on HuggingFace Daily Papers) is an open harness for long-horizon multimodal creative work built on an editable canvas that holds an evolving project state — references, drafts, alternatives, edits, failed attempts and version relations — rather than treating generation as isolated steps. The three-layer architecture makes the canvas simultaneously the user workspace, the agent's external memory, its action space and the shared project state, so a human can intervene mid-run without breaking the agent's context. No quantitative benchmarks are claimed in the abstract, which is the paper's main weakness; the contribution is the harness design and the open release.