diff --git a/docs/users/extension/introduction.md b/docs/users/extension/introduction.md
index 2717150db..a0f39d957 100644
--- a/docs/users/extension/introduction.md
+++ b/docs/users/extension/introduction.md
@@ -34,10 +34,20 @@ You can install an extension using `qwen extensions install` from multiple sourc
 
 #### From Claude Code Marketplace
 
-Qwen Code also supports plugins from the [Claude Code Marketplace](https://claudemarketplaces.com/). Choose a marketplace and install a plugin from one marketplace through the format:
+Qwen Code also supports plugins from the [Claude Code Marketplace](https://claudemarketplaces.com/). Install from a marketplace and choose a plugin:
 
 ```bash
-qwen extensions install <marketplace-name | marketplace-url>:<plugin-name>
+qwen extensions install <marketplace-name>
+# or
+qwen extensions install <marketplace-github-url>
+```
+
+If you want to install a specific pulgin, you can use the format with plugin name:
+
+```bash
+qwen extensions install <marketplace-name>:<plugin-name>
+# or
+qwen extensions install <marketplace-github-url>:<plugin-name>
 ```
 
 For example, to install the `prompts.chat` plugin from the [f/awesome-chatgpt-prompts](https://claudemarketplaces.com/plugins/f-awesome-chatgpt-prompts) marketplace:
@@ -74,7 +84,9 @@ This command opens the respective marketplace in your default browser, allowing
 Qwen Code fully supports extensions from the [Gemini CLI Extensions Gallery](https://geminicli.com/extensions/). Simply install them using the git URL:
 
 ```bash
-qwen extensions install <gemini-cli-extension-url>
+qwen extensions install <gemini-cli-extension-github-url>
+# or
+qwen extensions install <owner>/<repo>
 ```
 
 Gemini extensions are automatically converted to Qwen Code format during installation:
diff --git a/packages/core/src/extension/claude-converter.ts b/packages/core/src/extension/claude-converter.ts
index 7b927c64f..224a22b11 100644
--- a/packages/core/src/extension/claude-converter.ts
+++ b/packages/core/src/extension/claude-converter.ts
@@ -709,6 +709,12 @@ async function resolvePluginSource(
       throw new Error(`Plugin source not found at ${sourcePath}`);
     }
 
+    // If source path equals marketplace dir (source is '.' or ''),
+    // return marketplaceDir directly to avoid copying to subdirectory of self
+    if (path.resolve(sourcePath) === path.resolve(marketplaceDir)) {
+      return marketplaceDir;
+    }
+
     // Copy to plugin directory
     await fs.promises.cp(sourcePath, pluginDir, { recursive: true });
     return pluginDir;