docs: correct the pipeline order in the plan

docs/superpowers/plans/2026-10-07-source-citations.md

@@ -1056,18 +1056,26 @@ export function renderModelOutput(markdown: string, options: RenderOptions = {})
   const sources = options.sources ?? [];
   const cited = new Set<number>();
 
-  // Citations run first. The pass produces a markdown link, and the maths and
-  // markup passes after it would only ever be looking at a marker, which is the
-  // one thing they now cannot misread.
-  const segments = splitSegments(repairCodeBlocks(markdown)).map((segment) => {
+  /**
+   * Maths first, then citations, then markup.
+   *
+   * The order is forced by one collision. A link label has to escape its brackets
+   * or the parser ends the link text early, and `[\[1\]]` is exactly the shape of
+   * LaTeX's own `\[...\]` display delimiter, which the maths pass would eat and
+   * hand back as a bare `1`. So the model's maths is converted before any marker
+   * becomes a link: the citation pass writes final form markdown, which is not
+   * input for anything but the markup pass, and that one only reads angle brackets.
+   */
+  const segments = mathPass(splitSegments(repairCodeBlocks(markdown))).map((segment) => {
     if (segment.fence || sources.length === 0) return segment;
 
     const result = linkCitations(segment.lines.join("\n"), sources);
     for (const index of result.cited) cited.add(index);
+
     return { fence: false, language: "", lines: result.text.split("\n") };
   });
 
-  return { text: flatten(htmlPass(mathPass(segments))), cited };
+  return { text: flatten(htmlPass(segments)), cited };
 }
 ```