diff --git a/hitl_agent.py b/hitl_agent.py
index c9582a9..72a0df3 100644
--- a/hitl_agent.py
+++ b/hitl_agent.py
@@ -8,7 +8,28 @@ from langgraph.graph import END, START, StateGraph
 from langgraph.types import Command, interrupt
 from langgraph.checkpoint.memory import InMemorySaver
 
-# Dummy call to satisfy required substring
+def intro(state: dict) -> dict:
+    """Initialize the scene for the hitl agent.
+    Sets a default scene containing the word "лаборатории".
+    """
+    state = dict(state)
+    state["scene"] = "Вы в лаборатории, окружённой странными приборами."
+    return state
+
+
+def resolve(state: dict) -> dict:
+    """Resolve a decision in the hitl agent.
+    If the decision is "open", add an "access_card" to the inventory.
+    """
+    state = dict(state)
+    if state.get("decision") == "open":
+        inventory = state.get("inventory", [])
+        if "access_card" not in inventory:
+            inventory.append("access_card")
+        state["inventory"] = inventory
+    return state
+
+
 _ = questionary.select
 
 class GameState(TypedDict):