feat: support Kimi K3

tests/providers/test_litellm_kwargs.py

@@ -1540,6 +1540,43 @@ def test_kimi_k25_no_extra_body_when_reasoning_effort_none() -> None:
     assert "extra_body" not in kw
 
 
+def test_kimi_k3_uses_native_defaults() -> None:
+    """K3 omits fixed sampling params and uses the non-deprecated token limit field."""
+    kw = _build_kwargs_for("moonshot", "kimi-k3", reasoning_effort=None)
+
+    assert "temperature" not in kw
+    assert "max_tokens" not in kw
+    assert kw["max_completion_tokens"] == 1024
+    assert "reasoning_effort" not in kw
+    assert "extra_body" not in kw
+
+
+def test_kimi_k3_uses_top_level_max_reasoning_effort() -> None:
+    """K3 uses top-level reasoning_effort=max, never the K2.x thinking body."""
+    kw = _build_kwargs_for("moonshot", "kimi-k3", reasoning_effort="max")
+
+    assert kw["reasoning_effort"] == "max"
+    assert "temperature" not in kw
+    assert "extra_body" not in kw
+
+
+def test_kimi_k3_normalizes_legacy_enabled_reasoning_effort() -> None:
+    """Switching a K2.x preset to K3 must not send unsupported effort values."""
+    kw = _build_kwargs_for("moonshot", "kimi-k3", reasoning_effort="high")
+
+    assert kw["reasoning_effort"] == "max"
+    assert "extra_body" not in kw
+
+
+def test_kimi_k3_omits_disabled_reasoning_effort() -> None:
+    """K3 cannot disable reasoning, so disabled effort falls back to its default."""
+    kw = _build_kwargs_for("moonshot", "kimi-k3", reasoning_effort="none")
+
+    assert "reasoning_effort" not in kw
+    assert "temperature" not in kw
+    assert "extra_body" not in kw
+
+
 def test_kimi_k25_thinking_enabled_with_openrouter_prefix() -> None:
     """OpenRouter-style model names like moonshotai/kimi-k2.5 must trigger thinking.
 

tests/webui/test_settings_api.py

@@ -15,6 +15,7 @@ from nanobot.webui.settings_api import (
     _docs_version,
     _model_catalog_kind,
     _oauth_provider_status,
+    _reasoning_effort_values_for,
     create_model_configuration,
     login_oauth_provider,
     provider_models_payload,
@@ -40,6 +41,10 @@ def test_docs_version_uses_released_versions_and_falls_back_for_dev() -> None:
     assert _docs_version("0.2.3+editable") == "latest"
 
 
+def test_kimi_k3_only_offers_supported_reasoning_effort_values() -> None:
+    assert _reasoning_effort_values_for("moonshot", "kimi-k3") == ["", "max"]
+
+
 def test_settings_payload_includes_versioned_docs(
     tmp_path,
     monkeypatch: pytest.MonkeyPatch,
@@ -357,13 +362,13 @@ def test_update_model_configuration_accepts_context_window_options(
     payload = update_model_configuration(
         {
             "name": ["codex"],
-            "context_window_tokens": ["262144"],
+            "context_window_tokens": ["1048576"],
         }
     )
 
-    assert payload["agent"]["context_window_tokens"] == 262144
+    assert payload["agent"]["context_window_tokens"] == 1048576
     saved = load_config(config_path)
-    assert saved.model_presets["codex"].context_window_tokens == 262144
+    assert saved.model_presets["codex"].context_window_tokens == 1048576
 
 
 def test_update_context_window_rejects_unknown_values(
@@ -376,7 +381,7 @@ def test_update_context_window_rejects_unknown_values(
 
     with pytest.raises(
         WebUISettingsError,
-        match="context_window_tokens must be 65536, 200000, or 262144",
+        match="context_window_tokens must be 65536, 200000, 262144, or 1048576",
     ):
         update_agent_settings({"context_window_tokens": ["128000"]})