feat: add configurable API model IDs for DeepSeek V4 Flash and Pro models (#4)

Author: wolfsilver

package.json

@@ -116,6 +116,25 @@
           "minimum": 0,
           "description": "Maximum number of output tokens per request. Set to 0 to use the API default (no limit). Useful for controlling costs."
         },
+        "deepseek-copilot.modelIdOverrides": {
+          "type": "object",
+          "default": {
+            "deepseek-v4-flash": "deepseek-v4-flash",
+            "deepseek-v4-pro": "deepseek-v4-pro"
+          },
+          "description": "Override the API model ID sent for each DeepSeek model. Defaults are prefilled with official DeepSeek IDs; change them only when using a compatible third-party API that uses different model names.",
+          "additionalProperties": false,
+          "properties": {
+            "deepseek-v4-flash": {
+              "type": "string",
+              "description": "API model ID for DeepSeek V4 Flash"
+            },
+            "deepseek-v4-pro": {
+              "type": "string",
+              "description": "API model ID for DeepSeek V4 Pro"
+            }
+          }
+        },
         "deepseek-copilot.visionModel": {
           "type": "string",
           "default": "",

src/auth.ts

@@ -90,6 +90,17 @@ export class AuthManager {
 		return config.get<string>('baseUrl') || 'https://api.deepseek.com';
 	}
 
+	/**
+	 * Resolve the API model ID to send to the DeepSeek endpoint.
+	 * Users can override the default IDs via settings to support compatible APIs.
+	 */
+	getApiModelId(vscodeModelId: string): string {
+		const config = vscode.workspace.getConfiguration('deepseek-copilot');
+		const overrides = config.get<Record<string, string>>('modelIdOverrides');
+		const override = overrides?.[vscodeModelId]?.trim();
+		return override || vscodeModelId;
+	}
+
 	/**
 	 * Get max tokens limit (0 = no limit).
 	 */

src/provider/index.ts

@@ -231,7 +231,7 @@ export class DeepSeekChatProvider implements vscode.LanguageModelChatProvider {
 		return new Promise<void>((resolve, reject) => {
 			client.streamChatCompletion(
 				{
-					model: modelInfo.id,
+					model: this.authManager.getApiModelId(modelInfo.id),
 					messages: deepseekMessages,
 					stream: true,
 					tools,