diff --git a/hybrid/human_ai_interfaces.py b/hybrid/human_ai_interfaces.py
index ad35e5a..350fa4b 100644
--- a/hybrid/human_ai_interfaces.py
+++ b/hybrid/human_ai_interfaces.py
@@ -1 +1,30 @@
-print("Hello World")
+from __future__ import annotations
+
+from dataclasses import dataclass
+
+@dataclass
+class Interface:
+    """Represents an interface between a human and AI."""
+    name: str
+    description: str
+    version: str = "1.0"
+
+
+class InterfaceManager:
+    """Manage human-AI interfaces."""
+    def __init__(self) -> None:
+        self.interfaces: dict[str, Interface] = {}
+
+    def register(self, iface: Interface) -> None:
+        """Register a new interface."""
+        self.interfaces[iface.name] = iface
+
+    def get(self, name: str) -> Interface | None:
+        """Retrieve an interface by name."""
+        return self.interfaces.get(name)
+
+
+if __name__ == "__main__":
+    manager = InterfaceManager()
+    manager.register(Interface("CLI", "Command line interface"))
+    print(manager.get("CLI"))