1 files changed, 16 insertions, 1 deletions
diff --git a/src/protocol/wire.rs b/src/protocol/wire.rs
index 655f47cb..4af2c794 100644
--- a/src/protocol/wire.rs
+++ b/src/protocol/wire.rs
@@ -13,7 +13,7 @@ use serde::{Deserialize, Serialize};
 // ---------------------------------------------------------------------------
 
 /// Current protocol version. Bumped when wire format changes incompatibly.
-pub const PROTOCOL_VERSION: u32 = 19;
+pub const PROTOCOL_VERSION: u32 = 20;
 
 /// Maximum allowed frame payload size (2 MB). Frames larger than this are
 /// rejected to prevent denial-of-service via oversized length prefixes.
@@ -711,6 +711,12 @@ pub enum ServerMessage {
         /// Whether the ASCII input source should be active.
         active: bool,
     },
+
+    /// Ring the foreground client's outer terminal for pane-originated BEL characters.
+    TerminalBell {
+        /// Number of BEL characters parsed from one PTY read.
+        count: u16,
+    },
 }
 
 // ---------------------------------------------------------------------------
@@ -1555,6 +1561,15 @@ mod tests {
         }
     }
 
+    #[test]
+    fn server_terminal_bell_roundtrip() {
+        let msg = ServerMessage::TerminalBell { count: 3 };
+        let encoded = bincode::serde::encode_to_vec(&msg, bincode::config::standard()).unwrap();
+        let (decoded, _): (ServerMessage, _) =
+            bincode::serde::decode_from_slice(&encoded, bincode::config::standard()).unwrap();
+        assert_eq!(msg, decoded);
+    }
+
     // ---- Framing ----
 
     #[test]