diff --git a/lucidia_llm/lucidia_rewards/truth_rm.py b/lucidia_llm/lucidia_rewards/truth_rm.py
new file mode 100644
index 0000000..ff64af3
--- /dev/null
+++ b/lucidia_llm/lucidia_rewards/truth_rm.py
@@ -0,0 +1,6 @@
+"""Reward model for enforcing truthfulness."""
+
+
+def score(prompt, completion):
+    """Score a completion based on truthfulness."""
+    raise NotImplementedError("Truthfulness reward model not implemented")