diff --git a/fireflyframework-rule-engine-core/pom.xml b/fireflyframework-rule-engine-core/pom.xml
index 4697e8b..a5af6d9 100644
--- a/fireflyframework-rule-engine-core/pom.xml
+++ b/fireflyframework-rule-engine-core/pom.xml
@@ -6,7 +6,7 @@
     <parent>
         <groupId>org.fireflyframework</groupId>
         <artifactId>fireflyframework-rule-engine</artifactId>
-        <version>26.04.01</version>
+        <version>26.05.06</version>
     </parent>
 
     <artifactId>fireflyframework-rule-engine-core</artifactId>
diff --git a/fireflyframework-rule-engine-core/src/main/java/org/fireflyframework/rules/core/observability/RuleEngineMetrics.java b/fireflyframework-rule-engine-core/src/main/java/org/fireflyframework/rules/core/observability/RuleEngineMetrics.java
new file mode 100644
index 0000000..89855c0
--- /dev/null
+++ b/fireflyframework-rule-engine-core/src/main/java/org/fireflyframework/rules/core/observability/RuleEngineMetrics.java
@@ -0,0 +1,71 @@
+/*
+ * Copyright 2024-2026 Firefly Software Foundation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.fireflyframework.rules.core.observability;
+
+import io.micrometer.core.instrument.MeterRegistry;
+import org.fireflyframework.observability.metrics.FireflyMetricsSupport;
+import reactor.core.publisher.Mono;
+
+/**
+ * Observability instrumentation for the Firefly rule engine.
+ * <p>
+ * Records:
+ * <ul>
+ *     <li>{@code firefly.ruleengine.evaluations} — total rule evaluations, tagged
+ *         by {@code rule.id} and {@code result} (matched/unmatched/error)</li>
+ *     <li>{@code firefly.ruleengine.evaluation.duration} — timer of evaluation latency,
+ *         tagged by {@code rule.id}</li>
+ *     <li>{@code firefly.ruleengine.conditions.matched} — counter of matched conditions,
+ *         tagged by {@code rule.id}, {@code condition.id}</li>
+ *     <li>{@code firefly.ruleengine.compilations} — counter of YAML→AST compilations,
+ *         tagged by {@code status} (success/failure)</li>
+ *     <li>{@code firefly.ruleengine.errors} — counter of evaluation errors,
+ *         tagged by {@code rule.id}, {@code error.type}</li>
+ * </ul>
+ */
+public class RuleEngineMetrics extends FireflyMetricsSupport {
+
+    private static final String TAG_RULE_ID = "rule.id";
+    private static final String TAG_CONDITION_ID = "condition.id";
+    private static final String TAG_RESULT = "result";
+
+    public RuleEngineMetrics(MeterRegistry meterRegistry) {
+        super(meterRegistry, "ruleengine");
+    }
+
+    public <T> Mono<T> timedEvaluation(String ruleId, Mono<T> evaluation) {
+        return timed("evaluation.duration", evaluation, TAG_RULE_ID, ruleId)
+                .doOnSuccess(v -> counter("evaluations",
+                        TAG_RULE_ID, ruleId, TAG_RESULT, "matched").increment())
+                .doOnError(e -> {
+                    counter("evaluations", TAG_RULE_ID, ruleId, TAG_RESULT, "error").increment();
+                    recordFailure("errors", e, TAG_RULE_ID, ruleId);
+                });
+    }
+
+    public void recordUnmatched(String ruleId) {
+        counter("evaluations", TAG_RULE_ID, ruleId, TAG_RESULT, "unmatched").increment();
+    }
+
+    public void recordConditionMatched(String ruleId, String conditionId) {
+        counter("conditions.matched", TAG_RULE_ID, ruleId, TAG_CONDITION_ID, conditionId).increment();
+    }
+
+    public void recordCompilation(boolean success) {
+        counter("compilations", "status", success ? "success" : "failure").increment();
+    }
+}
diff --git a/fireflyframework-rule-engine-core/src/main/java/org/fireflyframework/rules/core/observability/RuleEngineObservabilityAutoConfiguration.java b/fireflyframework-rule-engine-core/src/main/java/org/fireflyframework/rules/core/observability/RuleEngineObservabilityAutoConfiguration.java
new file mode 100644
index 0000000..e2c18f1
--- /dev/null
+++ b/fireflyframework-rule-engine-core/src/main/java/org/fireflyframework/rules/core/observability/RuleEngineObservabilityAutoConfiguration.java
@@ -0,0 +1,42 @@
+/*
+ * Copyright 2024-2026 Firefly Software Foundation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.fireflyframework.rules.core.observability;
+
+import io.micrometer.core.instrument.MeterRegistry;
+import org.springframework.boot.autoconfigure.AutoConfiguration;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnBean;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
+import org.springframework.context.annotation.Bean;
+
+/**
+ * Auto-configures {@link RuleEngineMetrics} as a Spring bean.
+ */
+@AutoConfiguration
+@ConditionalOnClass(MeterRegistry.class)
+@ConditionalOnProperty(prefix = "firefly.observability.metrics", name = "enabled",
+        havingValue = "true", matchIfMissing = true)
+public class RuleEngineObservabilityAutoConfiguration {
+
+    @Bean
+    @ConditionalOnMissingBean
+    @ConditionalOnBean(MeterRegistry.class)
+    RuleEngineMetrics ruleEngineMetrics(MeterRegistry meterRegistry) {
+        return new RuleEngineMetrics(meterRegistry);
+    }
+}
diff --git a/fireflyframework-rule-engine-core/src/main/resources/META-INF/spring/org.springframework.boot.autoconfigure.AutoConfiguration.imports b/fireflyframework-rule-engine-core/src/main/resources/META-INF/spring/org.springframework.boot.autoconfigure.AutoConfiguration.imports
index 517593c..4da25cc 100644
--- a/fireflyframework-rule-engine-core/src/main/resources/META-INF/spring/org.springframework.boot.autoconfigure.AutoConfiguration.imports
+++ b/fireflyframework-rule-engine-core/src/main/resources/META-INF/spring/org.springframework.boot.autoconfigure.AutoConfiguration.imports
@@ -1 +1,2 @@
 org.fireflyframework.rules.core.config.RuleEngineCacheAutoConfiguration
+org.fireflyframework.rules.core.observability.RuleEngineObservabilityAutoConfiguration
diff --git a/fireflyframework-rule-engine-interfaces/pom.xml b/fireflyframework-rule-engine-interfaces/pom.xml
index e544cab..1706b9f 100644
--- a/fireflyframework-rule-engine-interfaces/pom.xml
+++ b/fireflyframework-rule-engine-interfaces/pom.xml
@@ -6,7 +6,7 @@
     <parent>
         <groupId>org.fireflyframework</groupId>
         <artifactId>fireflyframework-rule-engine</artifactId>
-        <version>26.04.01</version>
+        <version>26.05.06</version>
     </parent>
 
     <artifactId>fireflyframework-rule-engine-interfaces</artifactId>
diff --git a/fireflyframework-rule-engine-models/pom.xml b/fireflyframework-rule-engine-models/pom.xml
index 8354fc6..587af91 100644
--- a/fireflyframework-rule-engine-models/pom.xml
+++ b/fireflyframework-rule-engine-models/pom.xml
@@ -6,7 +6,7 @@
     <parent>
         <groupId>org.fireflyframework</groupId>
         <artifactId>fireflyframework-rule-engine</artifactId>
-        <version>26.04.01</version>
+        <version>26.05.06</version>
     </parent>
 
     <artifactId>fireflyframework-rule-engine-models</artifactId>
diff --git a/fireflyframework-rule-engine-sdk/pom.xml b/fireflyframework-rule-engine-sdk/pom.xml
index aa0d202..0e0a5b9 100644
--- a/fireflyframework-rule-engine-sdk/pom.xml
+++ b/fireflyframework-rule-engine-sdk/pom.xml
@@ -6,7 +6,7 @@
     <parent>
         <groupId>org.fireflyframework</groupId>
         <artifactId>fireflyframework-rule-engine</artifactId>
-        <version>26.04.01</version>
+        <version>26.05.06</version>
     </parent>
 
     <artifactId>fireflyframework-rule-engine-sdk</artifactId>
diff --git a/fireflyframework-rule-engine-web/pom.xml b/fireflyframework-rule-engine-web/pom.xml
index 3e5b003..9af6f59 100644
--- a/fireflyframework-rule-engine-web/pom.xml
+++ b/fireflyframework-rule-engine-web/pom.xml
@@ -6,7 +6,7 @@
     <parent>
         <groupId>org.fireflyframework</groupId>
         <artifactId>fireflyframework-rule-engine</artifactId>
-        <version>26.04.01</version>
+        <version>26.05.06</version>
     </parent>
 
     <artifactId>fireflyframework-rule-engine-web</artifactId>
diff --git a/pom.xml b/pom.xml
index cbd1e11..02db30c 100644
--- a/pom.xml
+++ b/pom.xml
@@ -7,13 +7,13 @@
     <parent>
         <groupId>org.fireflyframework</groupId>
         <artifactId>fireflyframework-parent</artifactId>
-        <version>26.04.01</version>
+        <version>26.05.06</version>
         <relativePath/>
     </parent>
 
     <groupId>org.fireflyframework</groupId>
     <artifactId>fireflyframework-rule-engine</artifactId>
-    <version>26.04.01</version>
+    <version>26.05.06</version>
     <packaging>pom</packaging>
 
     <name>Firefly Framework - Rule Engine Library</name>