monitoring

var (
	ToolInvocations = prometheus.NewCounterVec(
		prometheus.CounterOpts{
			Namespace: namespace,
			Name:      "tool_invocations_total",
			Help:      "Total number of tool invocations",
		},
		[]string{"tool"},
	)

	ToolLatency = prometheus.NewHistogramVec(
		prometheus.HistogramOpts{
			Namespace: namespace,
			Name:      "tool_duration_seconds",
			Help:      "Tool execution duration in seconds",
			Buckets:   prometheus.ExponentialBuckets(0.01, 2, 12),
		},
		[]string{"tool"},
	)

	SessionStarts = prometheus.NewCounter(
		prometheus.CounterOpts{
			Namespace: namespace,
			Name:      "session_starts_total",
			Help:      "Total number of sessions started",
		},
	)

	SessionCloses = prometheus.NewCounter(
		prometheus.CounterOpts{
			Namespace: namespace,
			Name:      "session_closes_total",
			Help:      "Total number of sessions closed",
		},
	)

	ActiveSessions = prometheus.NewGauge(
		prometheus.GaugeOpts{
			Namespace: namespace,
			Name:      "active_sessions",
			Help:      "Current number of active sessions",
		},
	)

	ErrorsTotal = prometheus.NewCounterVec(
		prometheus.CounterOpts{
			Namespace: namespace,
			Name:      "errors_total",
			Help:      "Total number of errors encountered per method",
		},
		[]string{"method"},
	)
)