25 - the definitions §11 held sit at the code, and §8 says only what the README does not

src/nesting.ts

@@ -1,2 +1,2 @@
-// Levels count per AGENTS.md §11.
+// A level is one block-list recursion in either direction: a readable list's items sit one below it, its directive spelling's two.
 export const largestNesting = 500