diff --git a/src/solanaceae/contact/components.hpp b/src/solanaceae/contact/components.hpp
index 2d1c331..febaf2c 100644
--- a/src/solanaceae/contact/components.hpp
+++ b/src/solanaceae/contact/components.hpp
@@ -108,7 +108,21 @@ namespace Contact::Components {
 		}
 	};
 
-	// last seen (not disconnected?)
+	// the first time *we* have seen the contact
+	struct FirstSeen {
+		uint64_t ts {0};
+	};
+
+	struct LastSeen {
+		// update rate might vary, check connection state first
+		uint64_t ts {0};
+	};
+
+	struct LastActivity {
+		// message observed
+		// maybe status set
+		uint64_t ts {0};
+	};
 
 } // Contact::Components
 
diff --git a/src/solanaceae/contact/components_id.inl b/src/solanaceae/contact/components_id.inl
index 46006d0..819b72e 100644
--- a/src/solanaceae/contact/components_id.inl
+++ b/src/solanaceae/contact/components_id.inl
@@ -37,6 +37,9 @@ DEFINE_COMP_ID(Contact::Components::AvatarMemory)
 DEFINE_COMP_ID(Contact::Components::AvatarFile)
 DEFINE_COMP_ID(Contact::Components::ConnectionState)
 DEFINE_COMP_ID(Contact::Components::StatusText)
+DEFINE_COMP_ID(Contact::Components::FirstSeen)
+DEFINE_COMP_ID(Contact::Components::LastSeen)
+DEFINE_COMP_ID(Contact::Components::LastActivity)
 
 #undef DEFINE_COMP_ID