diff --git a/embabel-agent-api/src/main/kotlin/com/embabel/agent/spi/validation/AgentValidationManager.kt b/embabel-agent-api/src/main/kotlin/com/embabel/agent/spi/validation/AgentValidationManager.kt
index f4514ad4f..179466d1a 100644
--- a/embabel-agent-api/src/main/kotlin/com/embabel/agent/spi/validation/AgentValidationManager.kt
+++ b/embabel-agent-api/src/main/kotlin/com/embabel/agent/spi/validation/AgentValidationManager.kt
@@ -16,6 +16,7 @@
 package com.embabel.agent.spi.validation
 
 import com.embabel.agent.core.AgentScope
+import com.embabel.common.core.validation.ValidationResult
 
 interface AgentValidationManager {
     fun validate(agentScope: AgentScope): ValidationResult
diff --git a/embabel-agent-api/src/main/kotlin/com/embabel/agent/spi/validation/AgentValidator.kt b/embabel-agent-api/src/main/kotlin/com/embabel/agent/spi/validation/AgentValidator.kt
index f2e977d3d..929c9586f 100644
--- a/embabel-agent-api/src/main/kotlin/com/embabel/agent/spi/validation/AgentValidator.kt
+++ b/embabel-agent-api/src/main/kotlin/com/embabel/agent/spi/validation/AgentValidator.kt
@@ -16,6 +16,7 @@
 package com.embabel.agent.spi.validation
 
 import com.embabel.agent.core.AgentScope
+import com.embabel.common.core.validation.ValidationResult
 
 fun interface AgentValidator {
 
@@ -31,36 +32,3 @@ fun interface AgentStructureAgentValidator : AgentValidator {
 }
 
 interface PathToCompletionAgentValidator : AgentValidator
-
-data class ValidationResult(
-    val isValid: Boolean,
-    val errors: List<ValidationError>,
-) {
-
-    companion object {
-        val VALID = ValidationResult(
-            isValid = true,
-            errors = emptyList(),
-        )
-    }
-}
-
-data class ValidationError(
-    val code: String,
-    val message: String,
-    val severity: ValidationSeverity,
-    val location: ValidationLocation,
-)
-
-enum class ValidationSeverity {
-    ERROR,
-    WARNING,
-    INFO
-}
-
-data class ValidationLocation(
-    val type: String,
-    val name: String,
-    val agentName: String,
-    val component: String,
-)
diff --git a/embabel-agent-api/src/main/kotlin/com/embabel/agent/spi/validation/DefaultAgentStructureValidator.kt b/embabel-agent-api/src/main/kotlin/com/embabel/agent/spi/validation/DefaultAgentStructureValidator.kt
index 9f90629b6..794e62c12 100644
--- a/embabel-agent-api/src/main/kotlin/com/embabel/agent/spi/validation/DefaultAgentStructureValidator.kt
+++ b/embabel-agent-api/src/main/kotlin/com/embabel/agent/spi/validation/DefaultAgentStructureValidator.kt
@@ -19,6 +19,10 @@ import com.embabel.agent.api.annotation.Action
 import com.embabel.agent.api.annotation.Agent
 import com.embabel.agent.api.annotation.Condition
 import com.embabel.agent.core.AgentScope
+import com.embabel.common.core.validation.ValidationError
+import com.embabel.common.core.validation.ValidationLocation
+import com.embabel.common.core.validation.ValidationResult
+import com.embabel.common.core.validation.ValidationSeverity
 import com.embabel.common.util.loggerFor
 import org.springframework.beans.factory.InitializingBean
 import org.springframework.beans.factory.getBeansWithAnnotation
diff --git a/embabel-agent-api/src/main/kotlin/com/embabel/agent/spi/validation/DefaultAgentValidationManager.kt b/embabel-agent-api/src/main/kotlin/com/embabel/agent/spi/validation/DefaultAgentValidationManager.kt
index 76327583e..3e3fa112a 100644
--- a/embabel-agent-api/src/main/kotlin/com/embabel/agent/spi/validation/DefaultAgentValidationManager.kt
+++ b/embabel-agent-api/src/main/kotlin/com/embabel/agent/spi/validation/DefaultAgentValidationManager.kt
@@ -16,6 +16,7 @@
 package com.embabel.agent.spi.validation
 
 import com.embabel.agent.core.AgentScope
+import com.embabel.common.core.validation.ValidationResult
 import org.slf4j.LoggerFactory
 import org.springframework.stereotype.Service
 
diff --git a/embabel-agent-api/src/main/kotlin/com/embabel/agent/spi/validation/DetailedValidationResult.kt b/embabel-agent-api/src/main/kotlin/com/embabel/agent/spi/validation/DetailedValidationResult.kt
index b817c4cc8..b6629c945 100644
--- a/embabel-agent-api/src/main/kotlin/com/embabel/agent/spi/validation/DetailedValidationResult.kt
+++ b/embabel-agent-api/src/main/kotlin/com/embabel/agent/spi/validation/DetailedValidationResult.kt
@@ -15,6 +15,8 @@
  */
 package com.embabel.agent.spi.validation
 
+import com.embabel.common.core.validation.ValidationResult
+
 data class DetailedValidationResult(
     val isValid: Boolean,
     val results: Map<AgentValidator, ValidationResult>,
diff --git a/embabel-agent-api/src/main/kotlin/com/embabel/agent/spi/validation/GoapPathToCompletionValidator.kt b/embabel-agent-api/src/main/kotlin/com/embabel/agent/spi/validation/GoapPathToCompletionValidator.kt
index b3314967d..64ca8e3a7 100644
--- a/embabel-agent-api/src/main/kotlin/com/embabel/agent/spi/validation/GoapPathToCompletionValidator.kt
+++ b/embabel-agent-api/src/main/kotlin/com/embabel/agent/spi/validation/GoapPathToCompletionValidator.kt
@@ -17,6 +17,10 @@ package com.embabel.agent.spi.validation
 
 import com.embabel.agent.core.AgentScope
 import com.embabel.agent.core.support.Rerun.HAS_RUN_CONDITION_PREFIX
+import com.embabel.common.core.validation.ValidationError
+import com.embabel.common.core.validation.ValidationLocation
+import com.embabel.common.core.validation.ValidationResult
+import com.embabel.common.core.validation.ValidationSeverity
 import com.embabel.plan.common.condition.ConditionAction
 import com.embabel.plan.common.condition.ConditionDetermination
 import com.embabel.plan.common.condition.ConditionGoal
diff --git a/embabel-agent-api/src/main/kotlin/com/embabel/common/core/validation/ValidationError.kt b/embabel-agent-api/src/main/kotlin/com/embabel/common/core/validation/ValidationError.kt
new file mode 100644
index 000000000..c0814cc5d
--- /dev/null
+++ b/embabel-agent-api/src/main/kotlin/com/embabel/common/core/validation/ValidationError.kt
@@ -0,0 +1,23 @@
+/*
+ * Copyright 2024-2026 Embabel Pty Ltd.
+ *
+ * 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 com.embabel.common.core.validation
+
+data class ValidationError(
+    val code: String,
+    val message: String,
+    val severity: ValidationSeverity,
+    val location: ValidationLocation,
+)
diff --git a/embabel-agent-api/src/main/kotlin/com/embabel/common/core/validation/ValidationLocation.kt b/embabel-agent-api/src/main/kotlin/com/embabel/common/core/validation/ValidationLocation.kt
new file mode 100644
index 000000000..36769b276
--- /dev/null
+++ b/embabel-agent-api/src/main/kotlin/com/embabel/common/core/validation/ValidationLocation.kt
@@ -0,0 +1,23 @@
+/*
+ * Copyright 2024-2026 Embabel Pty Ltd.
+ *
+ * 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 com.embabel.common.core.validation
+
+data class ValidationLocation(
+    val type: String,
+    val name: String,
+    val agentName: String,
+    val component: String,
+)
diff --git a/embabel-agent-api/src/main/kotlin/com/embabel/common/core/validation/ValidationResult.kt b/embabel-agent-api/src/main/kotlin/com/embabel/common/core/validation/ValidationResult.kt
new file mode 100644
index 000000000..98e76fbab
--- /dev/null
+++ b/embabel-agent-api/src/main/kotlin/com/embabel/common/core/validation/ValidationResult.kt
@@ -0,0 +1,29 @@
+/*
+ * Copyright 2024-2026 Embabel Pty Ltd.
+ *
+ * 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 com.embabel.common.core.validation
+
+data class ValidationResult(
+    val isValid: Boolean,
+    val errors: List<ValidationError>,
+) {
+
+    companion object {
+        val VALID = ValidationResult(
+            isValid = true,
+            errors = emptyList(),
+        )
+    }
+}
diff --git a/embabel-agent-api/src/main/kotlin/com/embabel/common/core/validation/ValidationSeverity.kt b/embabel-agent-api/src/main/kotlin/com/embabel/common/core/validation/ValidationSeverity.kt
new file mode 100644
index 000000000..5a1e53abd
--- /dev/null
+++ b/embabel-agent-api/src/main/kotlin/com/embabel/common/core/validation/ValidationSeverity.kt
@@ -0,0 +1,23 @@
+/*
+ * Copyright 2024-2026 Embabel Pty Ltd.
+ *
+ * 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 com.embabel.common.core.validation
+
+enum class ValidationSeverity {
+    ERROR,
+    CRITICAL,
+    WARNING,
+    INFO
+}