diff --git a/mellea/stdlib/session.py b/mellea/stdlib/session.py
index 885228b8..0d2d6f97 100644
--- a/mellea/stdlib/session.py
+++ b/mellea/stdlib/session.py
@@ -5,6 +5,7 @@
 import contextvars
 from collections.abc import Generator
 from contextlib import contextmanager
+from copy import deepcopy
 from typing import Any, Literal, Optional
 
 from mellea.backends import Backend, BaseModelSubclass
@@ -453,13 +454,23 @@ def genslot(
         Returns:
             ModelOutputThunk: Output thunk
         """
+        generate_logs: list[GenerateLog] = []
         result: ModelOutputThunk = self.backend.generate_from_context(
             action=gen_slot,
             ctx=self.ctx,
             model_options=model_options,
             format=format,
+            generate_logs=generate_logs,
             tool_calls=tool_calls,
         )
+        # make sure that the last and only Log is marked as the one related to result
+        assert len(generate_logs) == 1, "Simple call can only add one generate_log"
+        generate_logs[0].is_final_result = True
+
+        self.ctx.insert_turn(
+            ContextTurn(deepcopy(gen_slot), result), generate_logs=generate_logs
+        )
+
         return result
 
     def query(
diff --git a/test/stdlib_basics/test_genslot.py b/test/stdlib_basics/test_genslot.py
index 2618a040..67d01613 100644
--- a/test/stdlib_basics/test_genslot.py
+++ b/test/stdlib_basics/test_genslot.py
@@ -1,6 +1,7 @@
 import pytest
 from typing import Literal
 from mellea import generative, start_session
+from mellea.stdlib.base import LinearContext
 
 
 @generative
@@ -13,7 +14,7 @@ def write_me_an_email() -> str: ...
 
 @pytest.fixture
 def session():
-    return start_session()
+    return start_session(ctx=LinearContext())
 
 
 @pytest.fixture
@@ -34,5 +35,11 @@ def test_sentiment_output(classify_sentiment_output):
     assert classify_sentiment_output in ["positive", "negative"]
 
 
+def test_gen_slot_logs(classify_sentiment_output, session):
+    sent = classify_sentiment_output
+    last_prompt = session.last_prompt()[-1]
+    assert isinstance(last_prompt, dict)
+    assert set(last_prompt.keys()) == {"role", "content"}
+
 if __name__ == "__main__":
     pytest.main([__file__])