diff --git a/label_swe_chat_prompts.py b/label_swe_chat_prompts.py
index 8de36a5..4934d70 100644
--- a/label_swe_chat_prompts.py
+++ b/label_swe_chat_prompts.py
@@ -306,6 +306,16 @@ def _append(path: Path, states: Sequence[dict[str, Any]]) -> None:
         os.fsync(handle.fileno())
 
 
+def record_from_decision(candidate: Candidate, decision: dict[str, Any]) -> dict[str, Any]:
+    """Construct the exact seven-field student record from a teacher decision."""
+    record = {field: decision[field] for field in SOURCE_FIELDS - {"prompt"}}
+    record["prompt"] = candidate.prompt
+    if not decision["recoverableFromFirst"]:
+        record["slice"] = "vague-eval"
+    validate_source_record(record, candidate.id)
+    return record
+
+
 def run(args: argparse.Namespace) -> dict[str, int]:
     lines = base.source_lines(args.input)
     source = candidates(lines)
@@ -335,10 +345,7 @@ def run(args: argparse.Namespace) -> dict[str, int]:
         newly: list[dict[str, Any]] = []
         for candidate, decision in decisions:
             if decision["keep"]:
-                record = {field: decision[field] for field in SOURCE_FIELDS}
-                if not decision["recoverableFromFirst"]:
-                    record["slice"] = "vague-eval"
-                validate_source_record(record, candidate.id)
+                record = record_from_decision(candidate, decision)
                 newly.append(_state(candidate, status="labeled", record=record, reason=None, recoverable=decision["recoverableFromFirst"]))
             else:
                 newly.append(_state(candidate, status="rejected", record=None, reason=f"semantic_junk:{decision['junkReason'].strip()}", recoverable=None))
diff --git a/tests/test_label_swe_chat_prompts.py b/tests/test_label_swe_chat_prompts.py
index ca2d14c..8639dbe 100644
--- a/tests/test_label_swe_chat_prompts.py
+++ b/tests/test_label_swe_chat_prompts.py
@@ -83,6 +83,13 @@ class LabelSWEChatPromptsTests(unittest.TestCase):
         with self.assertRaisesRegex(ValueError, "rather than truncating"):
             label_swe_chat_prompts.response_for_labeling("x" * 1_001, 1_000)
 
+    def test_record_uses_only_the_first_user_message_as_student_text(self):
+        candidate = self.candidate()
+        decision = self.decision(candidate, True)["items"][0]
+        record = label_swe_chat_prompts.record_from_decision(candidate, decision)
+        self.assertEqual(candidate.prompt, record["prompt"])
+        self.assertNotIn(candidate.response, record.values())
+
 
 if __name__ == "__main__":
     unittest.main()