fix(llm): omit temperature for Kimi K2.5 and K2.6 (#3960)

tests/test_llm_core_temperature.py

@@ -29,7 +29,12 @@ def test_normal_models_allow_temperature(model):
     assert llm_core._restricts_temperature(model) is False
 
 
-def _capture_openai_payload(monkeypatch, model, temperature):
+def _capture_openai_payload(
+    monkeypatch,
+    model,
+    temperature,
+    url="https://api.openai.com/v1/chat/completions",
+):
     """Run a synchronous OpenAI-compatible call and return the posted JSON body."""
     llm_core._response_cache.clear()
     seen = {}
@@ -45,7 +50,7 @@ def _capture_openai_payload(monkeypatch, model, temperature):
 
     monkeypatch.setattr(llm_core.httpx, "post", fake_post)
     result = llm_core.llm_call(
-        "https://api.openai.com/v1/chat/completions",
+        url,
         model,
         [{"role": "user", "content": "Say OK"}],
         temperature=temperature,
@@ -131,3 +136,61 @@ def test_anthropic_payload_clamps_negative():
 def test_anthropic_payload_none_temperature_does_not_crash():
     payload = _anthropic_payload(None)
     assert payload["temperature"] is None
+
+
+@pytest.mark.parametrize(
+    "model",
+    [
+        "kimi-k2.5",
+        "kimi-k2.6",
+        "moonshot/kimi-k2.6",
+        "kimi-k2.6-preview",
+    ],
+)
+def test_moonshot_k2_5_plus_uses_fixed_temperature(model):
+    assert llm_core._moonshot_rejects_custom_temperature("moonshot", model)
+
+
+@pytest.mark.parametrize(
+    "provider,model",
+    [
+        ("openai", "kimi-k2.6"),
+        ("moonshot", "kimi-k2-0905-preview"),
+        ("moonshot", "kimi-k2-thinking"),
+        ("moonshot", "kimi-k2.50"),
+        ("moonshot", None),
+    ],
+)
+def test_other_models_keep_temperature(provider, model):
+    assert not llm_core._moonshot_rejects_custom_temperature(provider, model)
+
+
+@pytest.mark.parametrize(
+    "url",
+    [
+        "https://api.moonshot.ai/v1/chat/completions",
+        "https://api.moonshot.cn/v1/chat/completions",
+    ],
+)
+def test_moonshot_provider_detection(url):
+    assert llm_core._detect_provider(url) == "moonshot"
+
+
+def test_moonshot_k2_6_payload_omits_temperature(monkeypatch):
+    payload = _capture_openai_payload(
+        monkeypatch,
+        "kimi-k2.6",
+        0.7,
+        url="https://api.moonshot.ai/v1/chat/completions",
+    )
+    assert "temperature" not in payload
+
+
+def test_self_hosted_kimi_k2_6_payload_keeps_temperature(monkeypatch):
+    payload = _capture_openai_payload(
+        monkeypatch,
+        "kimi-k2.6",
+        0.7,
+        url="http://localhost:8000/v1/chat/completions",
+    )
+    assert payload["temperature"] == 0.7