fix(providers): send Kimi headers when listing models

internal/http/provider_models.go

@@ -15,8 +15,8 @@ import (
 
 // ModelInfo is a normalized model entry returned by the list-models endpoint.
 type ModelInfo struct {
-	ID        string                        `json:"id"`
-	Name      string                        `json:"name,omitempty"`
+	ID        string                         `json:"id"`
+	Name      string                         `json:"name,omitempty"`
 	Reasoning *providers.ReasoningCapability `json:"reasoning,omitempty"`
 }
 
@@ -109,11 +109,8 @@ func (h *ProvidersHandler) handleListProviderModels(w http.ResponseWriter, r *ht
 		models = minimaxModels()
 	default:
 		// All other types use OpenAI-compatible /models endpoint
-		apiBase := strings.TrimRight(h.resolveAPIBase(p), "/")
-		if apiBase == "" {
-			apiBase = "https://api.openai.com/v1"
-		}
-		models, err = fetchOpenAIModels(ctx, apiBase, p.APIKey)
+		apiBase := openAIModelsAPIBase(p.ProviderType, h.resolveAPIBase(p))
+		models, err = fetchOpenAIModels(ctx, apiBase, p.APIKey, openAIModelsExtraHeaders(p.ProviderType))
 	}
 
 	if err != nil {
@@ -126,6 +123,28 @@ func (h *ProvidersHandler) handleListProviderModels(w http.ResponseWriter, r *ht
 	respond(withReasoningCapabilities(models))
 }
 
+func openAIModelsAPIBase(providerType, apiBase string) string {
+	base := strings.TrimRight(apiBase, "/")
+	if base != "" {
+		return base
+	}
+	switch providerType {
+	case store.ProviderKimiCoding:
+		return store.KimiCodingDefaultAPIBase
+	default:
+		return "https://api.openai.com/v1"
+	}
+}
+
+func openAIModelsExtraHeaders(providerType string) map[string]string {
+	if providerType != store.ProviderKimiCoding {
+		return nil
+	}
+	return map[string]string{
+		"User-Agent": store.KimiCodingRequiredUserAgent,
+	}
+}
+
 func reasoningDefaultsForModels(
 	settings []byte,
 	models []ModelInfo,

internal/http/provider_models_fetch.go

@@ -91,12 +91,15 @@ func fetchGeminiModels(ctx context.Context, apiKey string) ([]ModelInfo, error)
 }
 
 // fetchOpenAIModels calls an OpenAI-compatible /models endpoint.
-func fetchOpenAIModels(ctx context.Context, apiBase, apiKey string) ([]ModelInfo, error) {
+func fetchOpenAIModels(ctx context.Context, apiBase, apiKey string, extraHeaders map[string]string) ([]ModelInfo, error) {
 	req, err := http.NewRequestWithContext(ctx, "GET", apiBase+"/models", nil)
 	if err != nil {
 		return nil, err
 	}
 	req.Header.Set("Authorization", "Bearer "+apiKey)
+	for k, v := range extraHeaders {
+		req.Header.Set(k, v)
+	}
 
 	resp, err := http.DefaultClient.Do(req)
 	if err != nil {

internal/http/provider_models_test.go

@@ -179,6 +179,73 @@ func TestProvidersHandlerListProviderModelsOpenAICompatAnnotatesKnownModels(t *t
 	}
 }
 
+func TestProvidersHandlerListProviderModelsKimiCodingSendsRequiredUserAgent(t *testing.T) {
+	token := setupProvidersAdminToken(t)
+	var capturedAuth, capturedUserAgent string
+	upstream := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		capturedAuth = r.Header.Get("Authorization")
+		capturedUserAgent = r.Header.Get("User-Agent")
+		if r.URL.Path != "/models" {
+			http.NotFound(w, r)
+			return
+		}
+		_ = json.NewEncoder(w).Encode(map[string]any{
+			"data": []map[string]string{
+				{"id": store.KimiCodingDefaultModel},
+			},
+		})
+	}))
+	t.Cleanup(upstream.Close)
+
+	providerStore := newMockProviderStore()
+	provider := &store.LLMProviderData{
+		BaseModel:    store.BaseModel{ID: uuid.New()},
+		Name:         "kimi-coding",
+		ProviderType: store.ProviderKimiCoding,
+		APIBase:      upstream.URL,
+		APIKey:       "kimi-key",
+		Enabled:      true,
+	}
+	if err := providerStore.CreateProvider(t.Context(), provider); err != nil {
+		t.Fatalf("CreateProvider() error = %v", err)
+	}
+
+	handler := NewProvidersHandler(providerStore, newMockSecretsStore(), nil, "")
+	mux := http.NewServeMux()
+	handler.RegisterRoutes(mux)
+
+	req := httptest.NewRequest(http.MethodGet, "/v1/providers/"+provider.ID.String()+"/models", nil)
+	req.Header.Set("Authorization", "Bearer "+token)
+	w := httptest.NewRecorder()
+	mux.ServeHTTP(w, req)
+
+	if w.Code != http.StatusOK {
+		t.Fatalf("status code = %d, want %d, body=%s", w.Code, http.StatusOK, w.Body.String())
+	}
+	if capturedAuth != "Bearer kimi-key" {
+		t.Fatalf("Authorization = %q, want Bearer kimi-key", capturedAuth)
+	}
+	if capturedUserAgent != store.KimiCodingRequiredUserAgent {
+		t.Fatalf("User-Agent = %q, want %q", capturedUserAgent, store.KimiCodingRequiredUserAgent)
+	}
+	var result ProviderModelsResponse
+	if err := json.NewDecoder(w.Body).Decode(&result); err != nil {
+		t.Fatalf("Decode() error = %v", err)
+	}
+	if len(result.Models) != 1 || result.Models[0].ID != store.KimiCodingDefaultModel {
+		t.Fatalf("models = %#v, want %q", result.Models, store.KimiCodingDefaultModel)
+	}
+}
+
+func TestOpenAIModelsAPIBaseDefaultsKimiCoding(t *testing.T) {
+	if got := openAIModelsAPIBase(store.ProviderKimiCoding, ""); got != store.KimiCodingDefaultAPIBase {
+		t.Fatalf("Kimi default api base = %q, want %q", got, store.KimiCodingDefaultAPIBase)
+	}
+	if got := openAIModelsAPIBase(store.ProviderOpenAICompat, ""); got != "https://api.openai.com/v1" {
+		t.Fatalf("OpenAI compat default api base = %q", got)
+	}
+}
+
 // TestProvidersHandlerListProviderModelsOllamaRichMetadata verifies that the
 // handler fetches /api/tags from Ollama and maps rich details (family,
 // parameter_size, quantization_level) into the display name.