diff --git a/src/signals/onboarding-pack.ts b/src/signals/onboarding-pack.ts
index 4d7b34ed95..d139b7731b 100644
--- a/src/signals/onboarding-pack.ts
+++ b/src/signals/onboarding-pack.ts
@@ -410,6 +410,7 @@ function buildPreviewMarkdown(preview: RepoOnboardingPackPreview): string {
     preview.contributionLanes.forEach((lane) => {
       lines.push(`- ${lane.title}: ${lane.summary}`);
       appendNestedList(lines, "Preferred paths", lane.preferredPaths);
+      appendNestedList(lines, "Discouraged paths", lane.discouragedPaths);
       appendNestedList(lines, "Validation", lane.validationExpectations);
       appendNestedList(lines, "Notes", lane.publicNotes);
     });
diff --git a/test/unit/onboarding-pack.test.ts b/test/unit/onboarding-pack.test.ts
index a9a6967679..4eaad3ac27 100644
--- a/test/unit/onboarding-pack.test.ts
+++ b/test/unit/onboarding-pack.test.ts
@@ -96,11 +96,31 @@ describe("buildRepoOnboardingPackPreview", () => {
       "Confirm contribution guidance stays previewable before publication.",
     );
     expect(preview.previewMarkdown).toContain("Direct PR quality lane");
+    expect(preview.previewMarkdown).toContain("Discouraged paths: scripts/release/");
     expect(preview.previewMarkdown).toContain("Label policy");
     expect(preview.previewMarkdown).toContain("Validation expectations");
     expect(preview.previewMarkdown).toContain("Readiness warnings");
   });
 
+  it("omits the Discouraged paths lane entry when discouragedPaths is empty", () => {
+    const preview = buildRepoOnboardingPackPreview({
+      ...POLICY_COMPILER_FIXTURE,
+      contributionLanes: [
+        {
+          id: "docs-lane",
+          title: "Docs lane",
+          summary: "Documentation-only improvements.",
+          preferredPaths: ["docs/"],
+          discouragedPaths: [],
+          validationExpectations: ["Run npm run test:ci before submission."],
+        },
+      ],
+    });
+
+    expect(preview.previewMarkdown).toContain("Preferred paths: docs/");
+    expect(preview.previewMarkdown).not.toContain("Discouraged paths");
+  });
+
   it("keeps private owner context out of public onboarding material", () => {
     const preview = buildRepoOnboardingPackPreview({
       ...POLICY_COMPILER_FIXTURE,