diff --git a/README.md b/README.md
index 0ad269a..30850f1 100644
--- a/README.md
+++ b/README.md
@@ -166,7 +166,7 @@ $ npm install -g @offline-ai/cli
 $ ai COMMAND
 running command...
 $ ai (--version)
-@offline-ai/cli/0.4.2 linux-x64 node-v20.14.0
+@offline-ai/cli/0.4.3 linux-x64 node-v20.14.0
 $ ai --help [COMMAND]
 USAGE
   $ ai COMMAND
@@ -396,7 +396,7 @@ EXAMPLES
   $ ai agent publish <agent-name>
 ```
 
-_See code: [src/commands/agent/index.ts](https://github.com/offline-ai/cli/blob/v0.4.2/src/commands/agent/index.ts)_
+_See code: [src/commands/agent/index.ts](https://github.com/offline-ai/cli/blob/v0.4.3/src/commands/agent/index.ts)_
 
 ## `ai autocomplete [SHELL]`
 
diff --git a/TODO b/TODO
index 913aca1..096c2fd 100644
--- a/TODO
+++ b/TODO
@@ -41,3 +41,4 @@ bugs:
   ✔ `$exec`应该传递`llmStream`事件以便于显示外部脚本过程的流进度. @done(24-08-25 06:01)
   ✔ can not work on Windows @done(24-08-25 06:01)
   ☐ ai brain can not list downloaded
+  ☐ ai brain refresh can not work if no maxCount option
diff --git a/lib/file.ai.yaml b/lib/file.ai.yaml
index eb49bc4..ea71314 100644
--- a/lib/file.ai.yaml
+++ b/lib/file.ai.yaml
@@ -1,10 +1,10 @@
 ---
-version: 0.2.2
+version: 0.3.0
 type: lib
 description: |-
   the simple text file loader. You can use environment variables in file path, eg, "$HOME/documents/document.md".
 
-  It can be used in prompt. eg, `user: think about the following file content: @file(document.md)`
+  It can be used in prompt. eg, `user: "think about the following file content: @file(document.md)"`
 tag:
   - file
   - loader
@@ -22,10 +22,17 @@ output: # the file content
     const fs = await import('fs');
     const path = await import('path');
     let filepath = this.content || this[0]
-    const filename = path.basename(filepath);
-    filepath = expandPath(filepath)
-    const content = fs.readFileSync(filepath, 'utf8');
-    if (this.onlyContent) return content;
-    return `filename: ${filename}\nfile content:\n${content}`
+    if (!filepath) {throw new Error('No file path provided.')}
+    if (filepath.startsWith('https://') || filepath.startsWith('http://')) {
+      const content = await fetch(filepath).then(res => res.text());
+      if (this.onlyContent) return content;
+      return `url: ${filepath}\nfile content:\n${content}`
+    } else {
+      const filename = path.basename(filepath);
+      filepath = expandPath(filepath)
+      const content = fs.readFileSync(filepath, 'utf8');
+      if (this.onlyContent) return content;
+      return `filename: ${filename}\nfile content:\n${content}`
+    }
   }
 $loadFile