Working

shaders/black-and-white/shader.json

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+{
+  "id": "black-and-white",
+  "name": "Black and White",
+  "description": "A minimal monochrome shader that converts the decoded video input to grayscale.",
+  "category": "Built-in",
+  "entryPoint": "shadeVideo",
+  "parameters": []
+}