diff --git a/app/agent/__init__.py b/app/agent/__init__.py
new file mode 100644
index 0000000..ab51882
--- /dev/null
+++ b/app/agent/__init__.py
@@ -0,0 +1,28 @@
+"""Agent engine package — tools, memory, and the agent loop."""
+
+from app.agent.engine import Agent, AgentEngine
+from app.agent.memory import BaseMemory, ConversationMemory, LongTermMemory, Message
+from app.agent.tools import (
+    Tool,
+    ToolExecutionError,
+    ToolRegistry,
+    global_registry,
+    tool,
+)
+
+__all__ = [
+    # Tools
+    "Tool",
+    "ToolRegistry",
+    "ToolExecutionError",
+    "tool",
+    "global_registry",
+    # Memory
+    "BaseMemory",
+    "ConversationMemory",
+    "LongTermMemory",
+    "Message",
+    # Engine
+    "Agent",
+    "AgentEngine",
+]