Add version and send it down

websocket/client.go

@@ -47,6 +47,8 @@ type Client struct {
 	metricsCtx        context.Context
 	configNeedsSave   bool // Flag to track if config needs to be saved
 	serverVersion     string
+	configVersion     int64      // Latest config version received from server
+	configVersionMux  sync.RWMutex
 }
 
 type ClientOption func(*Client)
@@ -154,6 +156,22 @@ func (c *Client) GetServerVersion() string {
 	return c.serverVersion
 }
 
+// GetConfigVersion returns the latest config version received from server
+func (c *Client) GetConfigVersion() int64 {
+	c.configVersionMux.RLock()
+	defer c.configVersionMux.RUnlock()
+	return c.configVersion
+}
+
+// setConfigVersion updates the config version if the new version is higher
+func (c *Client) setConfigVersion(version int64) {
+	c.configVersionMux.Lock()
+	defer c.configVersionMux.Unlock()
+	if version > c.configVersion {
+		c.configVersion = version
+	}
+}
+
 // Connect establishes the WebSocket connection
 func (c *Client) Connect() error {
 	go c.connectWithRetry()
@@ -653,12 +671,22 @@ func (c *Client) pingMonitor() {
 			if c.conn == nil {
 				return
 			}
+			
+			// Send application-level ping with config version
+			pingMsg := WSMessage{
+				Type: "ping",
+				Data: map[string]interface{}{
+					"configVersion": c.GetConfigVersion(),
+				},
+			}
+			
 			c.writeMux.Lock()
-			err := c.conn.WriteControl(websocket.PingMessage, []byte{}, time.Now().Add(c.pingTimeout))
+			err := c.conn.WriteJSON(pingMsg)
 			if err == nil {
 				telemetry.IncWSMessage(c.metricsContext(), "out", "ping")
 			}
 			c.writeMux.Unlock()
+			
 			if err != nil {
 				// Check if we're shutting down before logging error and reconnecting
 				select {
@@ -737,6 +765,11 @@ func (c *Client) readPumpWithDisconnectDetection(started time.Time) {
 				}
 			}
 
+			// Extract and update config version from message if present
+			if msg.ConfigVersion > 0 {
+				c.setConfigVersion(msg.ConfigVersion)
+			}
+
 			c.handlersMux.RLock()
 			if handler, ok := c.handlers[msg.Type]; ok {
 				handler(msg)

websocket/types.go

@@ -17,6 +17,7 @@ type TokenResponse struct {
 }
 
 type WSMessage struct {
-	Type string      `json:"type"`
-	Data interface{} `json:"data"`
+	Type          string      `json:"type"`
+	Data          interface{} `json:"data"`
+	ConfigVersion int64       `json:"configVersion,omitempty"`
 }