$$ \frac{\partial L}{\partial z^{(2)}} = \frac{\partial L}{\partial \hat{y}} \frac{\partial \hat{y}}{\partial z^{(2)}} $$同步处理两项（因其部分抵消）：
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But the very first thing it did was introduce a “required dependency” named “openclaw-core,” along with platform-specific install steps. Those steps included convenient links (“here”, “this link”) that appeared to be normal documentation pointers.