canvas-json-handler-free为符合JSON Canvas 1.0规范的画布文件提供节点、边、分组的创建、编辑与校验，支持可视化结构化数据处理。
Install via ClawdBot CLI:
clawdbot install thcjp/canvas-json-handler-freeLoading skill content… the page will refresh in a moment.
Usage Guide
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