diff --git a/Partner-Core/src/main/java/work/slhaf/partner/module/impression/ImpressionObservation.kt b/Partner-Core/src/main/java/work/slhaf/partner/module/impression/ImpressionObservation.kt
new file mode 100644
index 00000000..af0236bc
--- /dev/null
+++ b/Partner-Core/src/main/java/work/slhaf/partner/module/impression/ImpressionObservation.kt
@@ -0,0 +1,18 @@
+package work.slhaf.partner.module.impression
+
+data class ImpressionEntityObservation @JvmOverloads constructor(
+    val proposedSubject: String,
+    val aliases: List<String> = emptyList(),
+    val impressions: Map<String, Int> = emptyMap(),
+    val features: Map<String, Int> = emptyMap(),
+    val relations: Map<String, Map<String, Int>> = emptyMap(),
+    val sourceActiveRuntimeIds: List<String> = emptyList(),
+    val evidenceSnippets: List<String> = emptyList(),
+    val reason: String? = null,
+)
+
+data class KnownEntityIdentity @JvmOverloads constructor(
+    val entityUuid: String,
+    val subject: String,
+    val aliases: List<String> = emptyList(),
+)