feat: add superderive stepwise derivation figures

A third sibling toolkit: rewrite steps, justification rails, cancel/substitute highlights, and lint-on-warning builds.
2026-08-17 10:05:03 +08:00
commit 9f635d358b
22 changed files with 724 additions and 0 deletions
@@ -0,0 +1,20 @@
+% Golden example -- a scale rewrite that must be seen, not just aligned.
+%   ../scripts/build.sh rewrite-cancel.tex
+\documentclass[border=10pt]{standalone}
+\usepackage[cjk]{superderive}
+
+\begin{document}
+\begin{tikzpicture}
+\sdstage{D1}{缩放来自方差，不是装饰}
+\sdrow{R1}
+  \sdstep[role=rewrite]{s1}{QK^{\top}}{QK^{\top}/\sqrt{d_k}}
+  \sdreason{s1}{§3.2.1，避免 softmax 饱和}
+\sdrowend
+\sdbbox{all}
+\sdtopformula{F}{$\mathrm{Attention}(Q,K,V)=\mathrm{softmax}(QK^{\top}/\sqrt{d_k})V$}
+\sdmeaningbox{mb}{120mm}{all}
+  {点积方差随 $d_k$ 线性涨}
+  {缩放是改写，不是新算子}
+  {没有缩放，softmax 进饱和区，梯度消失}
+\end{tikzpicture}
+\end{document}