Refine discussion closure messaging

plugin/core/discussion-messages.ts

@@ -31,10 +31,11 @@ export function buildDiscussionIdleReminderMessage(): string {
     "[Discussion Idle]",
     "",
     "No agent responded in the latest discussion round.",
-    "If the discussion goal has been achieved, the initiator should now:",
+    "If the discussion goal has already been achieved, the initiator should now:",
     "1. write the discussion summary to a file in the workspace",
     "2. call discuss-callback with the summary file path",
     "",
+    "This reminder does not mean the discussion was automatically summarized or closed.",
     "If more discussion is still needed, continue the discussion in this channel.",
   ].join("\n");
 }
@@ -46,6 +47,7 @@ export function buildDiscussionClosedMessage(): string {
     "This discussion channel has been closed.",
     "It is now kept for archive/reference only.",
     "Further discussion in this channel is ignored.",
+    "If follow-up work is needed, continue it from the origin work channel instead.",
   ].join("\n");
 }