fix(reply): make external btw replies explicit

src/auto-reply/reply/reply-payloads.ts

@@ -15,10 +15,12 @@ export function formatBtwTextForExternalDelivery(payload: ReplyPayload): string
   if (!text) {
     return payload.text;
   }
-  if (!payload.btw?.question?.trim()) {
+  const question = payload.btw?.question?.trim();
+  if (!question) {
     return payload.text;
   }
-  return text.startsWith("BTW:") ? text : `BTW: ${text}`;
+  const formatted = `BTW\nQuestion: ${question}\n\n${text}`;
+  return text === formatted || text.startsWith("BTW\nQuestion:") ? text : formatted;
 }
 
 function resolveReplyThreadingForPayload(params: {

src/auto-reply/reply/route-reply.test.ts

@@ -302,7 +302,7 @@ describe("routeReply", () => {
     );
   });
 
-  it("prefixes BTW replies on routed sends", async () => {
+  it("formats BTW replies prominently on routed sends", async () => {
     mocks.sendMessageSlack.mockClear();
     await routeReply({
       payload: { text: "323", btw: { question: "what is 17 * 19?" } },
@@ -312,12 +312,12 @@ describe("routeReply", () => {
     });
     expect(mocks.sendMessageSlack).toHaveBeenCalledWith(
       "channel:C123",
-      "BTW: 323",
+      "BTW\nQuestion: what is 17 * 19?\n\n323",
       expect.any(Object),
     );
   });
 
-  it("prefixes BTW replies on routed discord sends", async () => {
+  it("formats BTW replies prominently on routed discord sends", async () => {
     mocks.sendMessageDiscord.mockClear();
     await routeReply({
       payload: { text: "323", btw: { question: "what is 17 * 19?" } },
@@ -327,7 +327,7 @@ describe("routeReply", () => {
     });
     expect(mocks.sendMessageDiscord).toHaveBeenCalledWith(
       "channel:123456",
-      "BTW: 323",
+      "BTW\nQuestion: what is 17 * 19?\n\n323",
       expect.any(Object),
     );
   });

src/infra/outbound/deliver.test.ts

@@ -288,7 +288,7 @@ describe("deliverOutboundPayloads", () => {
     );
   });
 
-  it("prefixes BTW replies for telegram delivery", async () => {
+  it("formats BTW replies prominently for telegram delivery", async () => {
     const sendTelegram = vi.fn().mockResolvedValue({ messageId: "m1", chatId: "c1" });
 
     await deliverTelegramPayload({
@@ -301,7 +301,7 @@ describe("deliverOutboundPayloads", () => {
 
     expect(sendTelegram).toHaveBeenCalledWith(
       "123",
-      "BTW: 323",
+      "BTW\nQuestion: what is 17 * 19?\n\n323",
       expect.objectContaining({ verbose: false, textMode: "html" }),
     );
   });
@@ -743,7 +743,7 @@ describe("deliverOutboundPayloads", () => {
     ]);
   });
 
-  it("prefixes BTW replies for whatsapp delivery", async () => {
+  it("formats BTW replies prominently for whatsapp delivery", async () => {
     const sendWhatsApp = vi.fn().mockResolvedValue({ messageId: "w1", toJid: "jid" });
 
     await deliverWhatsAppPayload({
@@ -751,7 +751,11 @@ describe("deliverOutboundPayloads", () => {
       payload: { text: "323", btw: { question: "what is 17 * 19?" } },
     });
 
-    expect(sendWhatsApp).toHaveBeenCalledWith("+1555", "BTW: 323", expect.any(Object));
+    expect(sendWhatsApp).toHaveBeenCalledWith(
+      "+1555",
+      "BTW\nQuestion: what is 17 * 19?\n\n323",
+      expect.any(Object),
+    );
   });
 
   it("continues on errors when bestEffort is enabled", async () => {

src/infra/outbound/outbound.test.ts

@@ -1258,14 +1258,14 @@ describe("normalizeOutboundPayloads", () => {
     expect(normalized).toEqual([{ text: "final answer", mediaUrls: [] }]);
   });
 
-  it("prefixes BTW replies for external delivery", () => {
+  it("formats BTW replies prominently for external delivery", () => {
     const normalized = normalizeOutboundPayloads([
       {
         text: "323",
         btw: { question: "what is 17 * 19?" },
       },
     ]);
-    expect(normalized).toEqual([{ text: "BTW: 323", mediaUrls: [] }]);
+    expect(normalized).toEqual([{ text: "BTW\nQuestion: what is 17 * 19?\n\n323", mediaUrls: [] }]);
   });
 });