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chore: publish safetensors NexaMat stack artifacts

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encoder/v1/nexa_mat_V1_final.safetensors.json ADDED
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+ {
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+ "metadata": {
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+ "created_at_utc": "2026-05-06T07:50:37Z",
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+ "backend": "materials",
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+ "training_plan": "aetheron_materials_encoder_pretrain_v1",
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+ "training_phase": "encoder_pretrain",
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+ "model_family": "directional_potential",
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+ "model_config": {
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+ "hidden_dim": 192,
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+ "egnn_layers": 4,
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+ "max_neighbors": 8,
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+ "energy_mode": "atomwise_sum",
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+ "pair_energy_scale": 1.5,
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+ "angular_energy_scale": 1.0,
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+ "atom_energy_scale": 1.0,
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+ "element_reference_scale": 0.0,
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+ "message_aggregation": "learned"
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+ },
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+ "start_step": 164159,
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+ "val_split": "val",
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