diff --git a/src/auto-reply/reply/commands-export-session.test.ts b/src/auto-reply/reply/commands-export-session.test.ts
index 6da09b40c50d..42fa7db3050a 100644
--- a/src/auto-reply/reply/commands-export-session.test.ts
+++ b/src/auto-reply/reply/commands-export-session.test.ts
@@ -615,6 +615,30 @@ describe("buildExportSessionReply", () => {
     );
   });
 
+  it("marks the skipped-row list as truncated when more than 20 rows are invalid", async () => {
+    hoisted.sessionTranscriptEvents = [
+      ...Array.from({ length: 25 }, (_, index) => ({
+        type: "message",
+        id: `bad-${index + 1}`,
+        timestamp: `2026-05-16T00:00:${String(index).padStart(2, "0")}.000Z`,
+        message: { content: "missing role" },
+      })),
+      {
+        type: "message",
+        id: "entry-valid",
+        timestamp: "2026-05-16T00:01:00.000Z",
+        message: { role: "assistant", content: "valid assistant" },
+      },
+    ];
+
+    const reply = await buildExportSessionReply(makeParams());
+
+    const expectedRows = Array.from({ length: 20 }, (_, index) => index + 1).join(", ");
+    expect(reply.text).toContain(
+      `⚠️ Skipped 25 malformed transcript rows that were not session entries. rows ${expectedRows}, …`,
+    );
+  });
+
   it("warns when the session only contains user messages (backend-delegated transcript)", async () => {
     hoisted.loadSessionStoreMock.mockReturnValue({
       "agent:target:session": {
diff --git a/src/auto-reply/reply/commands-export-session.ts b/src/auto-reply/reply/commands-export-session.ts
index 9ec499ba5947..83669c666a8b 100644
--- a/src/auto-reply/reply/commands-export-session.ts
+++ b/src/auto-reply/reply/commands-export-session.ts
@@ -256,7 +256,10 @@ function formatSkippedRows(count: number): string {
 }
 
 function formatSessionExportWarning(summary: SessionExportWarningSummary): string {
-  const rows = summary.rows.length > 0 ? ` rows ${summary.rows.join(", ")}` : "";
+  const rows =
+    summary.rows.length > 0
+      ? ` rows ${summary.rows.join(", ")}${summary.count > summary.rows.length ? ", …" : ""}`
+      : "";
   const verb = summary.count === 1 ? "was" : "were";
   switch (summary.code) {
     case "invalid-session-json":