diff --git a/plans/sx-improvements.md b/plans/sx-improvements.md
index 28235808..05ba4eea 100644
--- a/plans/sx-improvements.md
+++ b/plans/sx-improvements.md
@@ -261,7 +261,7 @@ these when operands are known numbers/lists.
 | 10 — compiler + as converter registry | [x] | d22361e4 |
 | 11 — plugin migration + worker | [x] | 6328b810 |
 | 12 — frame records | [x] | a66c0f66 (fib -66%, loop -69%, reduce -86% via prim_call fast path) |
-| 13 — buffer primitive | [x] | (pending) (inspect rewrite: tree-d10 -80%, tree-d8 -76%, dict-1000 -61%, list-2000 -55%) |
+| 13 — buffer primitive | [x] | 0e022ab6 (inspect rewrite: tree-d10 -80%, tree-d8 -76%, dict-1000 -61%, list-2000 -55%) |
 | 14 — inline primitives JIT | [ ] | — |
 
 ---