{
  "id": "neumf",
  "name": "Neural Collaborative Filtering (NeuMF)",
  "description": "He et al. 2017 — Generalized Matrix Factorization + MLP fused. User+Item embeddings → element-wise MF + concatenated MLP → fused output",
  "icon": "🤝",
  "category": "Recommendation",
  "components": [
    { "id": "input-u", "type": "input", "name": "User ID", "position": { "x": 80, "y": 60 }, "params": { "shape": [1] }, "inputs": [], "outputs": [] },
    { "id": "input-i", "type": "input", "name": "Item ID", "position": { "x": 380, "y": 60 }, "params": { "shape": [1] }, "inputs": [], "outputs": [] },

    { "id": "u-mf-emb", "type": "embedding", "name": "User MF Emb", "scope": "gmf", "position": { "x": 0, "y": 200 }, "params": { "vocabSize": 100000, "embeddingDim": 32 }, "inputs": [], "outputs": [] },
    { "id": "i-mf-emb", "type": "embedding", "name": "Item MF Emb", "scope": "gmf", "position": { "x": 200, "y": 200 }, "params": { "vocabSize": 1000000, "embeddingDim": 32 }, "inputs": [], "outputs": [] },
    { "id": "u-mlp-emb", "type": "embedding", "name": "User MLP Emb", "scope": "mlp", "position": { "x": 380, "y": 200 }, "params": { "vocabSize": 100000, "embeddingDim": 64 }, "inputs": [], "outputs": [] },
    { "id": "i-mlp-emb", "type": "embedding", "name": "Item MLP Emb", "scope": "mlp", "position": { "x": 580, "y": 200 }, "params": { "vocabSize": 1000000, "embeddingDim": 64 }, "inputs": [], "outputs": [] },

    { "id": "mf-mul", "type": "multiply", "name": "GMF (⊙)", "scope": "gmf", "position": { "x": 80, "y": 360 }, "params": {}, "inputs": [], "outputs": [] },

    { "id": "mlp-cat", "type": "concatenate", "name": "Concat", "scope": "mlp", "position": { "x": 460, "y": 360 }, "params": { "axis": -1 }, "inputs": [], "outputs": [] },
    { "id": "mlp-fc1", "type": "linear", "name": "MLP FC 1", "scope": "mlp", "position": { "x": 460, "y": 500 }, "params": { "inFeatures": 128, "outFeatures": 64 }, "inputs": [], "outputs": [] },
    { "id": "mlp-relu1", "type": "relu", "name": "ReLU", "scope": "mlp", "position": { "x": 460, "y": 620 }, "params": {}, "inputs": [], "outputs": [] },
    { "id": "mlp-fc2", "type": "linear", "name": "MLP FC 2", "scope": "mlp", "position": { "x": 460, "y": 740 }, "params": { "inFeatures": 64, "outFeatures": 32 }, "inputs": [], "outputs": [] },
    { "id": "mlp-relu2", "type": "relu", "name": "ReLU", "scope": "mlp", "position": { "x": 460, "y": 860 }, "params": {}, "inputs": [], "outputs": [] },

    { "id": "fuse", "type": "concatenate", "name": "Fuse GMF+MLP", "scope": "head", "position": { "x": 270, "y": 1000 }, "params": { "axis": -1 }, "inputs": [], "outputs": [] },
    { "id": "head", "type": "linear", "name": "Predict", "scope": "head", "position": { "x": 270, "y": 1140 }, "params": { "inFeatures": 64, "outFeatures": 1 }, "inputs": [], "outputs": [] },
    { "id": "sig", "type": "sigmoid", "name": "Sigmoid", "scope": "head", "position": { "x": 270, "y": 1280 }, "params": {}, "inputs": [], "outputs": [] },
    { "id": "output", "type": "output", "name": "P(rating)", "position": { "x": 270, "y": 1400 }, "params": {}, "inputs": [], "outputs": [] }
  ],
  "connections": [
    { "id": "c1", "from": "input-u", "to": "u-mf-emb", "fromPort": "bottom", "toPort": "top" },
    { "id": "c2", "from": "input-u", "to": "u-mlp-emb", "fromPort": "bottom", "toPort": "top" },
    { "id": "c3", "from": "input-i", "to": "i-mf-emb", "fromPort": "bottom", "toPort": "top" },
    { "id": "c4", "from": "input-i", "to": "i-mlp-emb", "fromPort": "bottom", "toPort": "top" },
    { "id": "c5", "from": "u-mf-emb", "to": "mf-mul", "fromPort": "bottom", "toPort": "left" },
    { "id": "c6", "from": "i-mf-emb", "to": "mf-mul", "fromPort": "bottom", "toPort": "right" },
    { "id": "c7", "from": "u-mlp-emb", "to": "mlp-cat", "fromPort": "bottom", "toPort": "left" },
    { "id": "c8", "from": "i-mlp-emb", "to": "mlp-cat", "fromPort": "bottom", "toPort": "right" },
    { "id": "c9", "from": "mlp-cat", "to": "mlp-fc1", "fromPort": "bottom", "toPort": "top" },
    { "id": "c10", "from": "mlp-fc1", "to": "mlp-relu1", "fromPort": "bottom", "toPort": "top" },
    { "id": "c11", "from": "mlp-relu1", "to": "mlp-fc2", "fromPort": "bottom", "toPort": "top" },
    { "id": "c12", "from": "mlp-fc2", "to": "mlp-relu2", "fromPort": "bottom", "toPort": "top" },
    { "id": "c13", "from": "mf-mul", "to": "fuse", "fromPort": "bottom", "toPort": "left" },
    { "id": "c14", "from": "mlp-relu2", "to": "fuse", "fromPort": "bottom", "toPort": "right" },
    { "id": "c15", "from": "fuse", "to": "head", "fromPort": "bottom", "toPort": "top" },
    { "id": "c16", "from": "head", "to": "sig", "fromPort": "bottom", "toPort": "top" },
    { "id": "c17", "from": "sig", "to": "output", "fromPort": "bottom", "toPort": "top" }
  ]
}