storkit: merge 458_story_matrix_bot_ignores_messages_addressed_to_other_bots_in_ambient_mode

server/src/chat/transport/matrix/bot/messages.rs

@@ -19,7 +19,7 @@ use tokio::sync::watch;
 use super::context::BotContext;
 use super::format::markdown_to_html;
 use super::history::{ConversationEntry, ConversationRole, save_history};
-use super::mentions::{is_reply_to_bot, mentions_bot};
+use super::mentions::{is_addressed_to_other, is_reply_to_bot, mentions_bot};
 use super::verification::check_sender_verified;
 
 /// Build the user-facing prompt for a single turn.  In multi-user rooms the
@@ -93,6 +93,19 @@ pub(super) async fn on_room_message(
         return;
     }
 
+    // In ambient mode, ignore messages that are explicitly addressed to a
+    // different entity (e.g. "sally: do X" or "@sally do X" when we are stu).
+    // We still let through messages addressed to us and the "ambient on" command.
+    if is_ambient && !is_addressed && !is_ambient_on
+        && is_addressed_to_other(&body, &ctx.bot_user_id, &ctx.bot_name)
+    {
+        slog!(
+            "[matrix-bot] Ignoring ambient message addressed to another bot (sender={})",
+            ev.sender
+        );
+        return;
+    }
+
     // Reject commands from unencrypted rooms — E2EE is mandatory.
     if !room.encryption_state().is_encrypted() {
         slog!(