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"""
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Threshold Network for MOD-8 Circuit
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A formally verified threshold network computing Hamming weight mod 8.
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Uses the algebraic weight pattern [1, 1, 1, 1, 1, 1, 1, -7].
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"""
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import torch
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from safetensors.torch import load_file
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class ThresholdMod8:
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def __init__(self, weights_dict):
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self.weight = weights_dict['weight']
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self.bias = weights_dict['bias']
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def __call__(self, bits):
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inputs = torch.tensor([float(b) for b in bits])
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weighted_sum = (inputs * self.weight).sum() + self.bias
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return weighted_sum
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@classmethod
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def from_safetensors(cls, path="model.safetensors"):
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return cls(load_file(path))
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if __name__ == "__main__":
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weights = load_file("model.safetensors")
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model = ThresholdMod8(weights)
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print("MOD-8 Circuit Tests:")
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for hw in range(9):
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bits = [1]*hw + [0]*(8-hw)
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out = model(bits).item()
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print(f"HW={hw}: weighted_sum={out:.0f}, HW mod 8 = {hw % 8}")
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