{
    "operator": "HardSigmoid",
    "description": "MindSpore Lite 优化器无法正确处理 HardSigmoid+Mul 融合，导致推理错误",
    "replacement": {
        "type": "composite",
        "formula": "max(min(x * alpha + beta, 1), 0)",
        "ops": ["Mul", "Add", "Min", "Max"],
        "params": {
            "alpha": 0.2,
            "beta": 0.5
        }
    },
    "onnx_script": "replace_hardsigmoid_equivalent(input_path, output_path)",
    "error_pattern": "sigmoid_mul_fusion.*activation type is not sigmoid",
    "test_input": {
        "shape": [1, 64, 112, 112],
        "verify_output": false
    }
}