diff --git a/src/renderer/src/types/agent.ts b/src/renderer/src/types/agent.ts
new file mode 100644
index 0000000000..e6579a8fcf
--- /dev/null
+++ b/src/renderer/src/types/agent.ts
@@ -0,0 +1,36 @@
+/**
+ * Database entity types for Agent, Session, and SessionLog
+ * Shared between main and renderer processes
+ */
+
+// Agent entity representing an autonomous agent configuration
+export interface AgentEntity {
+  id: string
+  name: string
+  description?: string
+  avatar?: string
+  instructions?: string // System prompt
+  model: string // Model ID (required)
+  tools?: string[] // Array of enabled tool IDs
+  knowledges?: string[] // Array of enabled knowledge base IDs
+  configuration?: Record<string, any> // Extensible settings like temperature, top_p
+  created_at: string
+  updated_at: string
+}
+
+export type SessionStatus = 'idle' | 'running' | 'completed' | 'failed' | 'stopped'
+export type PermissionMode = 'readOnly' | 'acceptEdits' | 'bypassPermissions'
+
+// AgentSession entity representing a conversation session with one or more agents
+export interface AgentSessionEntity {
+  id: string
+  agent_id: string // Agent ID involved
+  user_goal?: string // Initial user goal for the session
+  status: SessionStatus
+  accessible_paths?: string[] // Array of directory paths the agent can access
+  agent_session_id?: string // Latest Claude SDK session ID for continuity
+  max_turns?: number // Maximum number of turns allowed in the session, default 10
+  permission_mode?: PermissionMode // Permission mode for the session
+  created_at: string
+  updated_at: string
+}