pi forum: give a fresh session its notice with the first run

Appended to a session with no conversation yet -- a new pi, or just
after /new -- the join notice sat ahead of the system message pi records
at the first run, and pi then sent that message without its content: the
provider refused every request with a 400. Queue it for the next turn
instead, which pi places after the system message.

1 files changed, 6 insertions, 1 deletions

diff --git a/config/pi/extensions/forum.ts b/config/pi/extensions/forum.ts
index 05d5edc..4b16103 100644
--- a/config/pi/extensions/forum.ts
+++ b/config/pi/extensions/forum.ts
@@ -567,10 +567,15 @@ export default function (pi: ExtensionAPI) {
     deliver();
   }
 
+  // A notice that wakes nobody. A session with no conversation yet -- a fresh
+  // pi, or just after /new -- gets it with its first run instead: appended
+  // now, it would sit ahead of the system message pi records at that run, and
+  // pi then sends that message without its content, which providers reject.
   function notice(details: NoticeDetails, text: string) {
+    const started = session?.sessionManager.getBranch().some((e) => e.type === "message") ?? false;
     pi.sendMessage<NoticeDetails>(
       { customType: NOTICE_TYPE, content: text, display: true, details },
-      { triggerTurn: false },
+      started ? { triggerTurn: false } : { deliverAs: "nextTurn" },
     );
   }