fix: use Responses API for DeepSeek by default

README.md

@@ -198,7 +198,7 @@ This section uses DeepSeek as an example, adding the provider and two models.
    - You can create multiple configs for the same provider with different names, e.g., `DeepSeek-Person`, `DeepSeek-Team`.
 
 3. Choose the API format: `API Format`.
-   - DeepSeek uses the `OpenAI Chat Completion` format, so select that.
+   - DeepSeek uses the `OpenAI Responses` format by default, so select that.
    - To see all supported formats, refer to the [API Format Support Table](#api-format-support-table).
 
 4. Set the base URL: `API Base URL`.

README_zh-CN.md

@@ -198,7 +198,7 @@ Zed 编辑器使用自研的 Zeta 系列模型，这里推荐两种方式添加
    - 同一个供应商可以添加多个不同名称的配置，比如 `DeepSeek-Person`、`DeepSeek-Team`。
 
 3. 填写接口格式：`API 格式`。
-   - DeepSeek 的接口是 `OpenAI Chat Completion` 格式，所以选则该格式。
+   - DeepSeek 默认使用 `OpenAI Responses` 格式，所以选择该格式。
    - 要了解支持的所有格式可查看 [API 格式支持表](#api-格式支持表)。
 
 4. 填写基础 URL：`API 基础 URL`。

src/well-known/providers.ts

@@ -455,7 +455,7 @@ export const WELL_KNOWN_PROVIDERS: WellKnownProviderConfig[] = [
   {
     name: 'DeepSeek',
     category: 'General',
-    type: 'openai-chat-completion',
+    type: 'openai-responses',
     baseUrl: 'https://api.deepseek.com',
     completion: { baseUrl: '../beta' },
     balanceProvider: { method: 'deepseek' },

test/unit/plan4-provider-catalog.test.ts

@@ -67,6 +67,15 @@ describe('Plan 4 well-known catalog', () => {
     });
   });
 
+  it('uses Responses by default for DeepSeek', () => {
+    expect(
+      WELL_KNOWN_PROVIDERS.find((provider) => provider.name === 'DeepSeek'),
+    ).toMatchObject({
+      type: 'openai-responses',
+      baseUrl: 'https://api.deepseek.com',
+    });
+  });
+
   it('declares Zeta primary IDs, aliases, and only completion templates', () => {
     expect(getModel('zeta')).toMatchObject({
       completion: { templates: ['zeta1'] },