diff --git a/src/ai/__init__.py b/src/ai/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/src/ai/heuristics/__init__.py b/src/ai/heuristics/__init__.py
new file mode 100644
index 0000000..31cbfc3
--- /dev/null
+++ b/src/ai/heuristics/__init__.py
@@ -0,0 +1,6 @@
+from .bumpiness import bumpiness
+from .height import aggregate_height
+from .holes import holes
+from .lines import complete_lines
+
+__all__ = ["aggregate_height", "bumpiness", "complete_lines", "holes"]
diff --git a/src/ai/heuristics/bumpiness.py b/src/ai/heuristics/bumpiness.py
new file mode 100644
index 0000000..03b4828
--- /dev/null
+++ b/src/ai/heuristics/bumpiness.py
@@ -0,0 +1,7 @@
+import numpy as np
+
+
+def bumpiness(
+    field: np.ndarray[int, np.dtype[np.uint8]],
+) -> int:
+    pass
diff --git a/src/ai/heuristics/height.py b/src/ai/heuristics/height.py
new file mode 100644
index 0000000..9ee8550
--- /dev/null
+++ b/src/ai/heuristics/height.py
@@ -0,0 +1,5 @@
+import numpy as np
+
+
+def aggregate_height(field: np.ndarray[int, np.dtype[np.uint8]]) -> int:
+    return 0
diff --git a/src/ai/heuristics/holes.py b/src/ai/heuristics/holes.py
new file mode 100644
index 0000000..0aa01b3
--- /dev/null
+++ b/src/ai/heuristics/holes.py
@@ -0,0 +1,7 @@
+import numpy as np
+
+
+def holes(
+    field: np.ndarray[int, np.dtype[np.uint8]],
+) -> int:
+    return 0
diff --git a/src/ai/heuristics/lines.py b/src/ai/heuristics/lines.py
new file mode 100644
index 0000000..d1285e7
--- /dev/null
+++ b/src/ai/heuristics/lines.py
@@ -0,0 +1,5 @@
+import numpy as np
+
+
+def complete_lines(field: np.ndarray[int, np.dtype[np.uint8]]) -> int:
+    return 0