diff --git a/server.js b/server.js
index b040376..8914c5c 100644
--- a/server.js
+++ b/server.js
@@ -210,7 +210,14 @@ function sendTelegramTo(chatId, text, topicId, replyMarkup, parseMode) {
   fetch(`https://api.telegram.org/bot${c.telegramBotToken}/sendMessage`, {
     method: 'POST', headers: { 'Content-Type': 'application/json' },
     body: JSON.stringify(payload)
-  }).then(async r=>{ if(!r.ok) console.error('telegram sendMessage status', r.status, (await r.text().catch(()=>'')).slice(0,200)); })
+  }).then(async r=>{
+      const body = await r.json().catch(()=>null);
+      if(!r.ok || !body || !body.ok) { console.error('telegram sendMessage status', r.status, JSON.stringify(body).slice(0,200)); return; }
+      // Log the id Telegram assigns. When a duplicate shows up in a feed, this says which of
+      // the two copies is ours — and therefore whether this process sent twice or something
+      // else with the same bot token posted the second one. (2026-09-18 duplicate hunt.)
+      console.log('tg-ok', TG_INSTANCE, 'chat=' + chatId, 'message_id=' + (body.result && body.result.message_id));
+    })
     .catch(e=>console.error('telegram error', e.message));
 }
 // Recruiting-framed version of a team event for the new-members topic: social