diff --git a/src/resources/extensions/gsd/auto-prompts.ts b/src/resources/extensions/gsd/auto-prompts.ts
index 1ea0e3366..4ac8176a6 100644
--- a/src/resources/extensions/gsd/auto-prompts.ts
+++ b/src/resources/extensions/gsd/auto-prompts.ts
@@ -849,6 +849,7 @@ export async function buildDiscussMilestonePrompt(mid: string, midTitle: string,
     inlinedTemplates: discussTemplates,
     structuredQuestionsAvailable: "true",
     commitInstruction: "Do not commit planning artifacts — .gsd/ is managed externally.",
+    fastPathInstruction: "",
   });
 
   // If a CONTEXT-DRAFT.md exists, append it as seed material