feat(providers): add xAI (Grok) to built-in providers

internal/llm/providers.go

@@ -329,6 +329,18 @@ var registry = []Provider{
 			"deepseek/deepseek-v4-flash-0731",
 		},
 	},
+	{
+		Name:        "xai",
+		DisplayName: "xAI Grok API",
+		Protocol:    ProtocolOpenAIChatCompletions,
+		BaseURL:     "https://api.x.ai/v1",
+		EnvVar:      "XAI_API_KEY",
+		Models: []string{
+			"grok-4.6",
+			"grok-4.5",
+			"grok-4.3",
+		},
+	},
 	{
 		Name:        "litellm",
 		DisplayName: "LiteLLM AI Gateway",

internal/llm/providers_test.go

@@ -75,7 +75,7 @@ func TestListProviders_Order(t *testing.T) {
 	if len(providers) < 3 {
 		t.Fatalf("expected at least 3 providers, got %d", len(providers))
 	}
-	expected := []string{"anthropic", "baidu-qianfan", "dashscope", "dashscope-tokenplan", "deepseek", "edenai", "hy-tokenplan", "iflytek", "kimi", "litellm", "mimo", "minimax", "minimax-cn", "mistral", "novita", "ollama-cloud", "openai", "siliconflow", "siliconflow-cn", "tencent-tokenhub", "volcengine", "z-ai", "z-ai-coding"}
+	expected := []string{"anthropic", "baidu-qianfan", "dashscope", "dashscope-tokenplan", "deepseek", "edenai", "hy-tokenplan", "iflytek", "kimi", "litellm", "mimo", "minimax", "minimax-cn", "mistral", "novita", "ollama-cloud", "openai", "siliconflow", "siliconflow-cn", "tencent-tokenhub", "volcengine", "xai", "z-ai", "z-ai-coding"}
 	if len(providers) != len(expected) {
 		t.Fatalf("expected %d providers, got %d", len(expected), len(providers))
 	}
@@ -314,6 +314,41 @@ func TestLookupProvider_MistralDetails(t *testing.T) {
 	}
 }
 
+func TestLookupProvider_XAIDetails(t *testing.T) {
+	p, ok := LookupProvider("xai")
+	if !ok {
+		t.Fatal("xai not found")
+	}
+	if p.DisplayName != "xAI Grok API" {
+		t.Errorf("DisplayName = %q, want %q", p.DisplayName, "xAI Grok API")
+	}
+	if p.Protocol != ProtocolOpenAIChatCompletions {
+		t.Errorf("Protocol = %q, want %q", p.Protocol, ProtocolOpenAIChatCompletions)
+	}
+	if p.BaseURL != "https://api.x.ai/v1" {
+		t.Errorf("BaseURL = %q, want %q", p.BaseURL, "https://api.x.ai/v1")
+	}
+	if p.EnvVar != "XAI_API_KEY" {
+		t.Errorf("EnvVar = %q, want %q", p.EnvVar, "XAI_API_KEY")
+	}
+	if p.AuthHeader != "" {
+		t.Errorf("AuthHeader = %q, want empty (OpenAI-compatible uses Bearer by default)", p.AuthHeader)
+	}
+	expectedModels := []string{
+		"grok-4.6",
+		"grok-4.5",
+		"grok-4.3",
+	}
+	if len(p.Models) != len(expectedModels) {
+		t.Fatalf("Models length = %d, want %d", len(p.Models), len(expectedModels))
+	}
+	for i, model := range expectedModels {
+		if p.Models[i] != model {
+			t.Errorf("Models[%d] = %q, want %q", i, p.Models[i], model)
+		}
+	}
+}
+
 // TestProviders_AllProtocolsCanonical verifies every registry entry uses a
 // canonical protocol constant — no stale "openai" / "anthropic" literals that
 // would bypass NormalizeProtocol downstream.

pages/src/content/docs/en/configuration.md

@@ -62,6 +62,7 @@ environment variable.
 | `siliconflow`  | openai | `https://api.siliconflow.com/v1` | `SILICONFLOW_GLOBAL_API_KEY` |
 | `siliconflow-cn`  | openai | `https://api.siliconflow.cn/v1` | `SILICONFLOW_API_KEY` |
 | `novita` | openai | `https://api.novita.ai/openai` | `NOVITA_API_KEY` |
+| `xai` | openai | `https://api.x.ai/v1` | `XAI_API_KEY` |
 
 ### Custom providers
 

pages/src/content/docs/ja/configuration.md

@@ -60,6 +60,7 @@ ocr config set providers.anthropic.api_key sk-ant-xxxxxxxxxx
 | `siliconflow`  | openai | `https://api.siliconflow.com/v1` | `SILICONFLOW_GLOBAL_API_KEY` |
 | `siliconflow-cn`  | openai | `https://api.siliconflow.cn/v1` | `SILICONFLOW_API_KEY` |
 | `novita` | openai | `https://api.novita.ai/openai` | `NOVITA_API_KEY` |
+| `xai` | openai | `https://api.x.ai/v1` | `XAI_API_KEY` |
 
 ### カスタム provider
 

pages/src/content/docs/ru/configuration.md

@@ -65,6 +65,7 @@ API-ключ. Если `providers.<name>.api_key` не задан, OCR испо
 | `siliconflow` | openai | `https://api.siliconflow.com/v1` | `SILICONFLOW_GLOBAL_API_KEY` |
 | `siliconflow-cn`  | openai | `https://api.siliconflow.cn/v1` | `SILICONFLOW_API_KEY` |
 | `novita` | openai | `https://api.novita.ai/openai` | `NOVITA_API_KEY` |
+| `xai` | openai | `https://api.x.ai/v1` | `XAI_API_KEY` |
 
 ### Пользовательские провайдеры
 

pages/src/content/docs/zh/configuration.md

@@ -59,6 +59,7 @@ ocr config set providers.anthropic.api_key sk-ant-xxxxxxxxxx
 | `siliconflow` | openai | `https://api.siliconflow.com/v1` | `SILICONFLOW_GLOBAL_API_KEY` |
 | `siliconflow-cn`  | openai | `https://api.siliconflow.cn/v1` | `SILICONFLOW_API_KEY` |
 | `novita` | openai | `https://api.novita.ai/openai` | `NOVITA_API_KEY` |
+| `xai` | openai | `https://api.x.ai/v1` | `XAI_API_KEY` |
 
 ### 自定义 provider