diff --git a/src/components/providers/AddProviderDialog.tsx b/src/components/providers/AddProviderDialog.tsx
index 7eae340ea..c3ff9e578 100644
--- a/src/components/providers/AddProviderDialog.tsx
+++ b/src/components/providers/AddProviderDialog.tsx
@@ -24,7 +24,7 @@ interface AddProviderDialogProps {
   open: boolean;
   onOpenChange: (open: boolean) => void;
   appId: AppId;
-  onSubmit: (provider: Omit<Provider, "id">) => Promise<void> | void;
+  onSubmit: (provider: Omit<Provider, "id"> & { providerKey?: string }) => Promise<void> | void;
 }
 
 export function AddProviderDialog({
@@ -85,7 +85,7 @@ export function AddProviderDialog({
       >;
 
       // 构造基础提交数据
-      const providerData: Omit<Provider, "id"> = {
+      const providerData: Omit<Provider, "id"> & { providerKey?: string } = {
         name: values.name.trim(),
         notes: values.notes?.trim() || undefined,
         websiteUrl: values.websiteUrl?.trim() || undefined,
@@ -96,6 +96,11 @@ export function AddProviderDialog({
         ...(values.meta ? { meta: values.meta } : {}),
       };
 
+      // OpenCode: pass providerKey for ID generation
+      if (appId === "opencode" && values.providerKey) {
+        providerData.providerKey = values.providerKey;
+      }
+
       const hasCustomEndpoints =
         providerData.meta?.custom_endpoints &&
         Object.keys(providerData.meta.custom_endpoints).length > 0;
diff --git a/src/components/providers/forms/BasicFormFields.tsx b/src/components/providers/forms/BasicFormFields.tsx
index 239c47e03..0bdaf5b18 100644
--- a/src/components/providers/forms/BasicFormFields.tsx
+++ b/src/components/providers/forms/BasicFormFields.tsx
@@ -1,5 +1,6 @@
 import { useTranslation } from "react-i18next";
 import { useState } from "react";
+import type { ReactNode } from "react";
 import {
   FormControl,
   FormField,
@@ -24,9 +25,11 @@ import type { ProviderFormData } from "@/lib/schemas/provider";
 
 interface BasicFormFieldsProps {
   form: UseFormReturn<ProviderFormData>;
+  /** Slot to render content between icon and name fields */
+  beforeNameSlot?: ReactNode;
 }
 
-export function BasicFormFields({ form }: BasicFormFieldsProps) {
+export function BasicFormFields({ form, beforeNameSlot }: BasicFormFieldsProps) {
   const { t } = useTranslation();
   const [iconDialogOpen, setIconDialogOpen] = useState(false);
 
@@ -112,6 +115,9 @@ export function BasicFormFields({ form }: BasicFormFieldsProps) {
         </Dialog>
       </div>
 
+      {/* Slot for additional fields between icon and name */}
+      {beforeNameSlot}
+
       {/* 基础信息 - 网格布局 */}
       <div className="grid grid-cols-1 md:grid-cols-2 gap-4">
         <FormField
diff --git a/src/components/providers/forms/ProviderForm.tsx b/src/components/providers/forms/ProviderForm.tsx
index e47a3313f..d837bfd3c 100644
--- a/src/components/providers/forms/ProviderForm.tsx
+++ b/src/components/providers/forms/ProviderForm.tsx
@@ -5,6 +5,7 @@ import { useTranslation } from "react-i18next";
 import { toast } from "sonner";
 import { Button } from "@/components/ui/button";
 import { Form, FormField, FormItem, FormMessage } from "@/components/ui/form";
+import { Input } from "@/components/ui/input";
 import { providerSchema, type ProviderFormData } from "@/lib/schemas/provider";
 import type { AppId } from "@/lib/api";
 import type { ProviderCategory, ProviderMeta } from "@/types";
@@ -55,6 +56,7 @@ import {
   useGeminiConfigState,
   useGeminiCommonConfig,
 } from "./hooks";
+import { useProvidersQuery } from "@/lib/query/queries";
 
 const CLAUDE_DEFAULT_CONFIG = JSON.stringify({ env: {} }, null, 2);
 const CODEX_DEFAULT_CONFIG = JSON.stringify({ auth: {}, config: "" }, null, 2);
@@ -498,6 +500,23 @@ export function ProviderForm({
     selectedPresetId: selectedPresetId ?? undefined,
   });
 
+  // OpenCode: query existing providers for duplicate key checking
+  const { data: opencodeProvidersData } = useProvidersQuery("opencode");
+  const existingOpencodeKeys = useMemo(() => {
+    if (!opencodeProvidersData?.providers) return [];
+    // Exclude current provider ID when in edit mode
+    return Object.keys(opencodeProvidersData.providers).filter(
+      (k) => k !== providerId
+    );
+  }, [opencodeProvidersData?.providers, providerId]);
+
+  // OpenCode Provider Key state
+  const [opencodeProviderKey, setOpencodeProviderKey] = useState<string>(() => {
+    if (appId !== "opencode") return "";
+    // In edit mode, use the existing provider ID as the key
+    return providerId || "";
+  });
+
   // OpenCode 配置状态
   const [opencodeNpm, setOpencodeNpm] = useState<string>(() => {
     if (appId !== "opencode") return "@ai-sdk/openai-compatible";
@@ -625,6 +644,23 @@ export function ProviderForm({
       return;
     }
 
+    // OpenCode: validate provider key
+    if (appId === "opencode") {
+      const keyPattern = /^[a-z0-9]+(-[a-z0-9]+)*$/;
+      if (!opencodeProviderKey.trim()) {
+        toast.error(t("opencode.providerKeyRequired"));
+        return;
+      }
+      if (!keyPattern.test(opencodeProviderKey)) {
+        toast.error(t("opencode.providerKeyInvalid"));
+        return;
+      }
+      if (!isEditMode && existingOpencodeKeys.includes(opencodeProviderKey)) {
+        toast.error(t("opencode.providerKeyDuplicate"));
+        return;
+      }
+    }
+
     // 非官方供应商必填校验：端点和 API Key
     if (category !== "official") {
       if (appId === "claude") {
@@ -722,6 +758,11 @@ export function ProviderForm({
       settingsConfig,
     };
 
+    // OpenCode: pass provider key for ID generation
+    if (appId === "opencode") {
+      payload.providerKey = opencodeProviderKey;
+    }
+
     if (activePreset) {
       payload.presetId = activePreset.id;
       if (activePreset.category) {
@@ -879,6 +920,7 @@ export function ProviderForm({
       }
       // OpenCode 自定义模式：重置为空配置
       if (appId === "opencode") {
+        setOpencodeProviderKey("");
         setOpencodeNpm("@ai-sdk/openai-compatible");
         setOpencodeBaseUrl("");
         setOpencodeApiKey("");
@@ -942,6 +984,9 @@ export function ProviderForm({
       const preset = entry.preset as OpenCodeProviderPreset;
       const config = preset.settingsConfig;
 
+      // Clear provider key (user must enter their own unique key)
+      setOpencodeProviderKey("");
+
       // Update OpenCode-specific states
       setOpencodeNpm(config.npm || "@ai-sdk/openai-compatible");
       setOpencodeBaseUrl(config.options?.baseURL || "");
@@ -996,7 +1041,48 @@ export function ProviderForm({
         )}
 
         {/* 基础字段 */}
-        <BasicFormFields form={form} />
+        <BasicFormFields
+          form={form}
+          beforeNameSlot={
+            appId === "opencode" ? (
+              <div className="space-y-2">
+                <Label htmlFor="opencode-key">
+                  {t("opencode.providerKey")}
+                  <span className="text-destructive ml-1">*</span>
+                </Label>
+                <Input
+                  id="opencode-key"
+                  value={opencodeProviderKey}
+                  onChange={(e) => setOpencodeProviderKey(e.target.value.toLowerCase().replace(/[^a-z0-9-]/g, ""))}
+                  placeholder={t("opencode.providerKeyPlaceholder")}
+                  disabled={isEditMode}
+                  className={
+                    (existingOpencodeKeys.includes(opencodeProviderKey) && !isEditMode) ||
+                    (opencodeProviderKey.trim() !== "" && !/^[a-z0-9]+(-[a-z0-9]+)*$/.test(opencodeProviderKey))
+                      ? "border-destructive"
+                      : ""
+                  }
+                />
+                {existingOpencodeKeys.includes(opencodeProviderKey) && !isEditMode && (
+                  <p className="text-xs text-destructive">
+                    {t("opencode.providerKeyDuplicate")}
+                  </p>
+                )}
+                {opencodeProviderKey.trim() !== "" && !/^[a-z0-9]+(-[a-z0-9]+)*$/.test(opencodeProviderKey) && (
+                  <p className="text-xs text-destructive">
+                    {t("opencode.providerKeyInvalid")}
+                  </p>
+                )}
+                {!(existingOpencodeKeys.includes(opencodeProviderKey) && !isEditMode) &&
+                 (opencodeProviderKey.trim() === "" || /^[a-z0-9]+(-[a-z0-9]+)*$/.test(opencodeProviderKey)) && (
+                  <p className="text-xs text-muted-foreground">
+                    {t("opencode.providerKeyHint")}
+                  </p>
+                )}
+              </div>
+            ) : undefined
+          }
+        />
 
         {/* Claude 专属字段 */}
         {appId === "claude" && (
@@ -1252,4 +1338,5 @@ export type ProviderFormValues = ProviderFormData & {
   presetCategory?: ProviderCategory;
   isPartner?: boolean;
   meta?: ProviderMeta;
+  providerKey?: string; // OpenCode: user-defined provider key
 };
diff --git a/src/hooks/useProviderActions.ts b/src/hooks/useProviderActions.ts
index a8322b4ce..cc46cca89 100644
--- a/src/hooks/useProviderActions.ts
+++ b/src/hooks/useProviderActions.ts
@@ -54,7 +54,7 @@ export function useProviderActions(activeApp: AppId) {
 
   // 添加供应商
   const addProvider = useCallback(
-    async (provider: Omit<Provider, "id">) => {
+    async (provider: Omit<Provider, "id"> & { providerKey?: string }) => {
       await addProviderMutation.mutateAsync(provider);
     },
     [addProviderMutation],
diff --git a/src/i18n/locales/en.json b/src/i18n/locales/en.json
index 2b0d987f1..4df6f3dad 100644
--- a/src/i18n/locales/en.json
+++ b/src/i18n/locales/en.json
@@ -475,7 +475,13 @@
     "addModel": "Add Model",
     "modelId": "Model ID",
     "modelName": "Display Name",
-    "noModels": "No models configured"
+    "noModels": "No models configured",
+    "providerKey": "Provider Key",
+    "providerKeyPlaceholder": "my-provider",
+    "providerKeyHint": "Unique identifier in config file. Cannot be changed after creation. Use lowercase letters, numbers, and hyphens only.",
+    "providerKeyRequired": "Provider key is required",
+    "providerKeyDuplicate": "This key is already in use",
+    "providerKeyInvalid": "Invalid format. Use lowercase letters, numbers, and hyphens only."
   },
   "providerPreset": {
     "label": "Provider Preset",
diff --git a/src/i18n/locales/ja.json b/src/i18n/locales/ja.json
index 2360ae195..03c83036b 100644
--- a/src/i18n/locales/ja.json
+++ b/src/i18n/locales/ja.json
@@ -475,7 +475,13 @@
     "addModel": "モデルを追加",
     "modelId": "モデル ID",
     "modelName": "表示名",
-    "noModels": "モデルが設定されていません"
+    "noModels": "モデルが設定されていません",
+    "providerKey": "プロバイダーキー",
+    "providerKeyPlaceholder": "my-provider",
+    "providerKeyHint": "設定ファイルの一意の識別子。作成後は変更できません。小文字、数字、ハイフンのみ使用できます。",
+    "providerKeyRequired": "プロバイダーキーを入力してください",
+    "providerKeyDuplicate": "このキーは既に使用されています",
+    "providerKeyInvalid": "無効な形式です。小文字、数字、ハイフンのみ使用できます。"
   },
   "providerPreset": {
     "label": "プロバイダータイプ",
diff --git a/src/i18n/locales/zh.json b/src/i18n/locales/zh.json
index 2f4181bae..30c27457e 100644
--- a/src/i18n/locales/zh.json
+++ b/src/i18n/locales/zh.json
@@ -475,7 +475,13 @@
     "addModel": "添加模型",
     "modelId": "模型 ID",
     "modelName": "显示名称",
-    "noModels": "暂无模型配置"
+    "noModels": "暂无模型配置",
+    "providerKey": "供应商标识",
+    "providerKeyPlaceholder": "my-provider",
+    "providerKeyHint": "配置文件中的唯一标识符，创建后无法修改，只能使用小写字母、数字和连字符",
+    "providerKeyRequired": "请填写供应商标识",
+    "providerKeyDuplicate": "此标识已被使用，请更换",
+    "providerKeyInvalid": "标识格式无效，只能使用小写字母、数字和连字符"
   },
   "providerPreset": {
     "label": "预设供应商",
diff --git a/src/lib/query/mutations.ts b/src/lib/query/mutations.ts
index 9ab4db1f8..73d75c854 100644
--- a/src/lib/query/mutations.ts
+++ b/src/lib/query/mutations.ts
@@ -6,36 +6,35 @@ import type { Provider, Settings } from "@/types";
 import { extractErrorMessage } from "@/utils/errorUtils";
 import { generateUUID } from "@/utils/uuid";
 
-/**
- * Convert a name to a URL-safe slug for use as provider ID
- * Used for OpenCode's additive mode where ID becomes the config key
- */
-function slugify(name: string): string {
-  return name
-    .toLowerCase()
-    .trim()
-    .replace(/[\s_]+/g, "-") // spaces and underscores → hyphens
-    .replace(/[^a-z0-9-]/g, "") // remove special characters
-    .replace(/-+/g, "-") // collapse multiple hyphens
-    .replace(/^-|-$/g, ""); // trim leading/trailing hyphens
-}
-
 export const useAddProviderMutation = (appId: AppId) => {
   const queryClient = useQueryClient();
   const { t } = useTranslation();
 
   return useMutation({
-    mutationFn: async (providerInput: Omit<Provider, "id">) => {
-      // OpenCode: use slugified name as ID (for readable config keys)
-      // Other apps: use random UUID
-      const id =
-        appId === "opencode" ? slugify(providerInput.name) : generateUUID();
+    mutationFn: async (
+      providerInput: Omit<Provider, "id"> & { providerKey?: string }
+    ) => {
+      let id: string;
+
+      if (appId === "opencode") {
+        // OpenCode: use user-provided providerKey as ID
+        if (!providerInput.providerKey) {
+          throw new Error("Provider key is required for OpenCode");
+        }
+        id = providerInput.providerKey;
+      } else {
+        // Other apps: use random UUID
+        id = generateUUID();
+      }
 
       const newProvider: Provider = {
         ...providerInput,
         id,
         createdAt: Date.now(),
       };
+      // Remove providerKey from the provider object before saving
+      delete (newProvider as any).providerKey;
+
       await providersApi.add(newProvider, appId);
       return newProvider;
     },