Support protocol thread configuration

tests/test_direct_protocol.py

@@ -198,6 +198,23 @@ class OllamaTests(unittest.TestCase):
         self.assertFalse(payload["stream"])
         self.assertEqual(result.raw_response, raw)
 
+    def test_request_omits_num_thread_when_backend_selection_is_requested(self) -> None:
+        response = Mock()
+        response.raise_for_status.return_value = None
+        response.json.return_value = {"response": "# Meeting Protocol"}
+        with patch.object(ollama.requests, "post", return_value=response) as post:
+            ollama.generate_once(
+                "http://localhost:11434",
+                "qwen3.8:27b",
+                "prompt",
+                timeout=30,
+                num_ctx=32768,
+                num_predict=8192,
+            )
+
+        payload = post.call_args.kwargs["json"]
+        self.assertNotIn("num_thread", payload["options"])
+
     def test_malformed_response_failure_without_retry(self) -> None:
         response = Mock()
         response.raise_for_status.return_value = None

tests/test_protocol_threads.py

@@ -0,0 +1,58 @@
+"""Protocol thread configuration through the public pipeline boundaries."""
+
+import tempfile
+import unittest
+from dataclasses import replace
+from pathlib import Path
+from unittest.mock import Mock, patch
+
+from src.meeting_lab.llm import ollama
+from src.meeting_lab.orchestration import mvp
+from tests import test_mvp_api as fixtures
+
+
+class ProtocolThreadTests(unittest.TestCase):
+    def test_initial_and_regeneration_forward_default_and_explicit_threads(self):
+        for threads in (None, 4, 10, 16):
+            with self.subTest(threads=threads), tempfile.TemporaryDirectory() as directory:
+                config = replace(
+                    fixtures.MvpApiTests().config(Path(directory)), protocol_num_thread=threads
+                )
+                with (
+                    patch.object(mvp, "prepare_audio", side_effect=fixtures.fake_prepare),
+                    patch.object(mvp, "transcribe_audio", side_effect=fixtures.fake_transcribe),
+                    patch.object(
+                        mvp, "generate_direct_protocol", side_effect=fixtures.fake_protocol
+                    ) as generate,
+                ):
+                    result = mvp.run_mvp_meeting(config, meeting_context=fixtures.context_data())
+                    self.assertEqual(result.exit_code, 0)
+                    self.assertEqual(generate.call_args.kwargs["num_thread"], threads)
+                    mvp.regenerate_mvp_protocol(
+                        result.run_dir,
+                        meeting_context=fixtures.context_data(),
+                        protocol_num_thread=threads,
+                    )
+                    self.assertEqual(generate.call_args.kwargs["num_thread"], threads)
+
+    def test_explicit_payload_and_invalid_values(self):
+        response = Mock()
+        response.json.return_value = {"response": "protocol"}
+        with patch.object(ollama.requests, "post", return_value=response) as post:
+            ollama.generate_once(
+                "url", "model", "prompt", timeout=1, num_ctx=32, num_predict=8, num_thread=10
+            )
+            self.assertEqual(post.call_args.kwargs["json"]["options"]["num_thread"], 10)
+            post.reset_mock()
+            for value in (0, -1, True, 1.5):
+                with self.assertRaises(ValueError):
+                    ollama.generate_once(
+                        "url",
+                        "model",
+                        "prompt",
+                        timeout=1,
+                        num_ctx=32,
+                        num_predict=8,
+                        num_thread=value,
+                    )
+            post.assert_not_called()