Implement Monlet MVP stack and UI updates

agent/internal/app/app.go

@@ -28,7 +28,7 @@ func (a *App) Run(ctx context.Context) error {
 	events := make(chan scheduler.Event, 256)
 
 	a.Metrics.ChecksConfigured.Set(float64(len(a.Cfg.Checks)))
-	a.Metrics.BuildInfo.WithLabelValues(a.Version, a.Cfg.Mode).Set(1)
+	a.Metrics.BuildInfo.WithLabelValues(a.Version, boolLabel(a.Cfg.PushesToServer()), boolLabel(a.Cfg.ExposesMetrics())).Set(1)
 	for _, c := range a.Cfg.Checks {
 		a.Metrics.CheckInterval.WithLabelValues(c.ID).Set(c.Interval.Duration.Seconds())
 	}
@@ -122,8 +122,11 @@ func (a *App) heartbeatLoop(ctx context.Context) {
 			AgentID:    a.AgentID,
 			ObservedAt: time.Now().UTC(),
 			Hostname:   a.Cfg.Hostname,
-			Version:    a.Version,
-			Mode:       a.Cfg.Mode,
+			Features: client.AgentFeatures{
+				Push:    a.Cfg.PushesToServer(),
+				Metrics: a.Cfg.ExposesMetrics(),
+			},
+			Labels: a.Cfg.HeartbeatLabels(a.Version),
 		}
 		a.Metrics.SendAttempts.WithLabelValues("heartbeat").Inc()
 		err := a.Client.SendHeartbeat(ctx, hb)
@@ -210,3 +213,10 @@ func sleep(ctx context.Context, d time.Duration) bool {
 		return false
 	}
 }
+
+func boolLabel(v bool) string {
+	if v {
+		return "true"
+	}
+	return "false"
+}