diff --git a/src/skills/grill/SKILL.md b/src/skills/grill/SKILL.md
index e36f144..a66bdf1 100644
--- a/src/skills/grill/SKILL.md
+++ b/src/skills/grill/SKILL.md
@@ -57,6 +57,8 @@ A completed grill summary is not an instruction to build.
 
 End each active grill turn with exactly one numbered question.
 Give concrete options with trade-offs.
+Label options with `A.`, `B.`, `C.`, and later letters.
+Use the same labels in the recommendation.
 Give a recommendation and rationale.
 
 Probe vague words, overloaded terms, and hidden assumptions.