diff --git a/.rubocop.yml b/.rubocop.yml
index 09a7846b..9a12b2d9 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -2,3 +2,6 @@ inherit_gem:
   rubocop-discourse: stree-compat.yml
 RSpec/NamedSubject:
   Enabled: false
+
+Style/GlobalVars:
+  AllowedVariables: [$prometheus_client]
diff --git a/about.json b/about.json
new file mode 100644
index 00000000..48d9cee0
--- /dev/null
+++ b/about.json
@@ -0,0 +1,7 @@
+{
+  "tests": {
+    "requiredPlugins": [
+      "https://github.com/discourse/discourse-prometheus"
+    ]
+  }
+}
diff --git a/lib/ai_moderation/spam_metric.rb b/lib/ai_moderation/spam_metric.rb
new file mode 100644
index 00000000..dbceacd1
--- /dev/null
+++ b/lib/ai_moderation/spam_metric.rb
@@ -0,0 +1,29 @@
+# frozen_string_literal: true
+
+module DiscourseAi
+  module AiModeration
+    class SpamMetric
+      def self.update(new_status, reviewable)
+        ai_spam_log = AiSpamLog.find_by(reviewable:)
+        return if ai_spam_log.nil?
+
+        increment("scanned")
+        increment("is_spam") if new_status == :approved && ai_spam_log.is_spam
+        increment("false_positive") if new_status == :rejected && ai_spam_log.is_spam
+        increment("false_negative") if new_status == :rejected && !ai_spam_log.is_spam
+      end
+
+      private
+
+      def self.increment(type, value = 1)
+        metric = ::DiscoursePrometheus::InternalMetric::Custom.new
+        metric.name = "discourse_ai_spam_detection"
+        metric.type = "Counter"
+        metric.description = "AI spam scanning statistics"
+        metric.labels = { db: RailsMultisite::ConnectionManagement.current_db, type: }
+        metric.value = value
+        $prometheus_client.send_json(metric.to_h)
+      end
+    end
+  end
+end
diff --git a/plugin.rb b/plugin.rb
index 66fc60a5..36c9bca3 100644
--- a/plugin.rb
+++ b/plugin.rb
@@ -84,6 +84,9 @@ after_initialize do
 
   on(:reviewable_transitioned_to) do |new_status, reviewable|
     ModelAccuracy.adjust_model_accuracy(new_status, reviewable)
+    if DiscourseAi::AiModeration::SpamScanner.enabled?
+      DiscourseAi::AiModeration::SpamMetric.update(new_status, reviewable)
+    end
   end
 
   if Rails.env.test?