workplace: nothing is sent to a teammate before the conversation is found

kits/workplace/app/src/App.jsx

@@ -86,6 +86,7 @@ function Workplace() {
   const [bootErr, setBootErr] = useState('');
   const [teammates, setTeammates] = useState(null); // null = loading
   const [cards, setCards] = useState([]);
+  const [cardsAt, setCardsAt] = useState(0);        // when the list was first read: a direct message is found in it, so nothing is sent before
   const [docs, setDocs] = useState({});             // group session id -> document
   const docsAt = useRef({});
   const [liveLocal, setLiveLocal] = useState({});   // teammate id -> true while this tab runs its turn
@@ -108,7 +109,7 @@ function Workplace() {
   const harnessIds = useMemo(() => [rec?.id, ...(teammates || []).map((t) => t.id)].filter(Boolean), [rec, teammates]);
   const refreshCards = useCallback(async () => {
     if (!me || !harnessIds.length) return;
-    try { setCards(await listCards(me, harnessIds)); } catch { /* keep the last list */ }
+    try { setCards(await listCards(me, harnessIds)); setCardsAt((t) => t || Date.now()); } catch { /* keep the last list */ }
   }, [me, harnessIds]);
 
   const ready = !!rec && !!me;
@@ -150,9 +151,9 @@ function Workplace() {
   const unread = useCallback((key, marker) => !!marker && seen[key] !== undefined && seen[key] !== marker, [seen]);
 
   const value = useMemo(() => ({
-    route, navigate, rec, me, teammates, refreshTeammates, cards, refreshCards, groupCards, docs, setDoc,
+    route, navigate, rec, me, teammates, refreshTeammates, cards, cardsLoaded: cardsAt > 0, refreshCards, groupCards, docs, setDoc,
     working, markLive, markSeen, unread, openDrawer: () => setDrawer(true), closeDrawer: () => setDrawer(false), tabId: TAB_ID,
-  }), [route, rec, me, teammates, refreshTeammates, cards, refreshCards, groupCards, docs, setDoc, working, markLive, markSeen, unread]);
+  }), [route, rec, me, teammates, refreshTeammates, cards, cardsAt, refreshCards, groupCards, docs, setDoc, working, markLive, markSeen, unread]);
 
   useEffect(() => { setDrawer(false); }, [route.kind, route.id]);
 

kits/workplace/app/src/components/DmView.jsx

@@ -35,7 +35,7 @@ function turnFiles(t, sid) {
 
 export default function DmView({ teammate }) {
   const wp = useWorkplace();
-  const { me, cards, teammates, navigate, markLive, markSeen, refreshCards, refreshTeammates, openDrawer } = wp;
+  const { me, cards, cardsLoaded, teammates, navigate, markLive, markSeen, refreshCards, refreshTeammates, openDrawer } = wp;
   const dialog = useDialog();
   const card = findDm(cards, teammate.id, me);
   const [sid, setSid] = useState(card?.id || '');
@@ -60,7 +60,11 @@ export default function DmView({ teammate }) {
 
   useEffect(() => { if (!sid && card?.id) setSid(card.id); }, [card?.id, sid]);
   const externalBusy = (!!(card && isLive(card)) || !!extLive) && !live;
-  const busy = !!live || externalBusy;
+  // Nothing is sent before the card list has been read once: the direct message is found in that
+  // list, and a message sent before it arrived opened a second conversation with the same teammate
+  // (hosted, where the list lands later, 2026-10-01).
+  const finding = !sid && !cardsLoaded;
+  const busy = !!live || externalBusy || finding;
 
   const load = useCallback(async () => {
     if (!sid) { setTurns([]); return; }
@@ -198,7 +202,7 @@ export default function DmView({ teammate }) {
         </div>
 
         <Composer placeholder={`Message ${teammate.name}`} disabled={busy} onSend={send} autoFocus
-                  hint={busy ? `${teammate.name} is working on your last message.` : ''} />
+                  hint={finding ? 'Opening your conversation…' : busy ? `${teammate.name} is working on your last message.` : ''} />
       </div>
       {files.pane}
       <Rail open={railOpen} onClose={() => setRailOpen(false)} teammate={teammate} sessions={sid ? [sid] : []} title={teammate.name}

kits/workplace/app/src/lib/dm.js

@@ -4,7 +4,7 @@
 import { patchSession, sessionTurns, streamTurn, turnsToMessages } from 'reifyui/harness';
 import { DM_TITLE } from './kit.js';
 import { mine } from './auth.js';
-import { turnInput } from './api.js';
+import { listCards, turnInput } from './api.js';
 
 export const dmTitle = (me) => `${DM_TITLE} · ${me?.name || 'me'}`;
 
@@ -31,6 +31,12 @@ export async function loadDm(sid) {
  *  and not the finish; a follow-up turn renamed the session again). The name is how the direct
  *  message is found next time, so it is put back when the turn is over. */
 export async function sendDm({ sid, bot, me, text, files = [], handlers = {} }) {
+  // Before opening a new conversation, look once more for the existing one: the caller's list may
+  // be older than the conversation (another window opened it a moment ago).
+  if (!sid) {
+    const found = findDm(await listCards(me, [bot.id]).catch(() => []), bot.id, me);
+    if (found) { sid = found.id; handlers.onSession?.(sid); }
+  }
   let session = sid || '';
   const r = await streamTurn({
     sessionId: sid, harnessId: bot.id, input: turnInput(text, files), instructions: dmInstructions(bot, me),