diff --git a/src/storage/message.rs b/src/storage/message.rs
index 638cc6a..75ea03b 100644
--- a/src/storage/message.rs
+++ b/src/storage/message.rs
@@ -1 +1,15 @@
-// Message CRUD 操作占位符
+use serde::{Deserialize, Serialize};
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct MessageMeta {
+    pub id: String,
+    pub session_id: String,
+    pub seq: i64,
+    pub role: String,
+    pub content: String,
+    pub media_refs: Option<String>,
+    pub tool_call_id: Option<String>,
+    pub tool_name: Option<String>,
+    pub tool_calls: Option<String>,
+    pub created_at: i64,
+}
diff --git a/src/storage/session.rs b/src/storage/session.rs
index 6387386..bb3eb15 100644
--- a/src/storage/session.rs
+++ b/src/storage/session.rs
@@ -1 +1,15 @@
-// Session CRUD 操作占位符
+use serde::{Deserialize, Serialize};
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct SessionMeta {
+    pub id: String,
+    pub channel: String,
+    pub chat_id: String,
+    pub dialog_id: String,
+    pub title: String,
+    pub created_at: i64,
+    pub last_active_at: i64,
+    pub message_count: i64,
+    pub routing_info: Option<String>,
+    pub deleted_at: Option<i64>,
+}