Record glossary provenance without transcript mutation

tests/test_protocol_transcript_input.py

@@ -137,6 +137,43 @@ class ProtocolInputBudgetTests(unittest.TestCase):
         self.assertEqual(result.transcript_input, compact)
         self.assertEqual(call.call_count, 1)
 
+    def test_glossary_aliases_do_not_mutate_protocol_input_or_source_artifact(
+        self,
+    ) -> None:
+        with tempfile.TemporaryDirectory() as directory:
+            root = Path(directory)
+            document = {
+                "text": "Lumini und Carbofool.",
+                "segments": [
+                    {
+                        "start": 0.0,
+                        "end": 1.0,
+                        "speaker_id": "SPEAKER_00",
+                        "text": "Lumini und Carbofool.",
+                    }
+                ],
+                "speaker_labels_anonymous": True,
+            }
+            transcript = self._write(root, document)
+            source_before = transcript.read_bytes()
+
+            result = generate_direct_protocol(
+                transcript,
+                glossary_aliases={"Lumini": "Luminy", "Carbofool": "Carbofol"},
+                model_check=Mock(return_value={}),
+                generation_call=Mock(return_value=completed_generation()),
+            )
+
+            self.assertEqual(transcript.read_bytes(), source_before)
+
+        self.assertIn("SPEAKER_00: Lumini und Carbofool.", result.transcript_input)
+        self.assertIn("SPEAKER_00: Lumini und Carbofool.", result.exact_prompt)
+        self.assertEqual(result.runtime_metadata["glossary_replacements"], [])
+        self.assertEqual(
+            result.runtime_metadata["glossary_aliases_configured"],
+            {"Carbofool": "Carbofol", "Lumini": "Luminy"},
+        )
+
     def test_mapped_speakers_and_statements_reach_final_ollama_payload(self) -> None:
         diarized = {
             "text": "",