feat: add default AGENTS.md and USER.md templates and ensure their presence in the user's config directory

resources/templates/AGENTS.md

@@ -0,0 +1,19 @@
+# Agent Instructions
+
+You are PicoBot, a personal AI assistant.
+
+## Personality
+- Helpful and friendly
+- Concise and to the point
+- Proactive when useful, respects user boundaries
+
+## Values
+- Accuracy over speed
+- User privacy and safety
+- Transparency in actions
+
+## Communication Style
+- Be clear and direct
+- Use Chinese or English based on the user's language
+- Explain reasoning when helpful
+- Ask clarifying questions when needed

resources/templates/USER.md

@@ -0,0 +1,31 @@
+# 用户配置
+
+PicoBot 会根据此文件了解你的偏好。
+
+## 基本信息
+
+- **称呼**: 用户
+- **时区**: Asia/Shanghai (UTC+8)
+- **语言**: 中文
+
+## 偏好设置
+
+### 回复风格
+- [ ] 简洁扼要
+- [ ] 详细解释
+- [ ] 根据问题自适应
+
+### 沟通风格
+- [ ] 随意
+- [ ] 专业
+- [ ] 技术导向
+
+## 工作环境
+
+- **主要角色**: 开发者
+- **当前项目**: 
+- **常用工具**: 
+
+---
+
+*编辑此文件来定制 PicoBot 的行为偏好。*

src/agent/system_prompt.rs

@@ -3,8 +3,11 @@
 //! This module provides a modular framework for building system prompts
 //! using the SystemPromptBuilder pattern.
 //!
-//! Configuration:
-//! - USER.md is loaded from ~/.picobot/USER.md (user's personal configuration)
+//! Prompt section ordering: Identity → Environment → Tasks → Rules → Capabilities → Dynamic
+//!
+//! Configuration files loaded from ~/.picobot/:
+//! - AGENTS.md — agent identity and behavior
+//! - USER.md   — user preferences and profile
 
 use crate::tools::ToolRegistry;
 use std::fmt::Write;
@@ -42,16 +45,17 @@ impl SystemPromptBuilder {
     pub fn with_defaults() -> Self {
         Self {
             sections: vec![
-                Box::new(ToolHonestySection),
-                Box::new(YourTaskSection),
-                Box::new(SafetySection),
-                Box::new(WorkspaceSection),
+                Box::new(AgentProfileSection),
                 Box::new(UserProfileSection),
+                Box::new(RuntimeSection),
+                Box::new(DateTimeSection),
+                Box::new(WorkspaceSection),
+                Box::new(YourTaskSection),
+                Box::new(ToolHonestySection),
+                Box::new(SafetySection),
+                Box::new(CrossChannelSection),
                 Box::new(MemorySection),
                 Box::new(HistorySection),
-                Box::new(DateTimeSection),
-                Box::new(RuntimeSection),
-                Box::new(CrossChannelSection),
             ],
         }
     }
@@ -202,6 +206,29 @@ impl PromptSection for UserProfileSection {
     }
 }
 
+/// Agent profile from ~/.picobot/AGENTS.md.
+pub struct AgentProfileSection;
+
+impl PromptSection for AgentProfileSection {
+    fn name(&self) -> &str {
+        "agent_profile"
+    }
+
+    fn build(&self, _ctx: &PromptContext<'_>) -> String {
+        let mut output = String::from("## Agent 配置\n\n");
+
+        if let Some(user_config_dir) = get_user_config_dir()
+            && let Some(content) =
+                load_file_from_dir(&user_config_dir, "AGENTS.md", BOOTSTRAP_MAX_CHARS)
+            {
+                output.push_str(&content);
+                return output;
+            }
+
+        String::new()
+    }
+}
+
 /// Current date and time.
 pub struct DateTimeSection;
 

src/gateway/mod.rs

@@ -36,6 +36,9 @@ impl GatewayState {
 
         tracing::info!("Using workspace directory: {}", workspace_path.display());
 
+        // Release default AGENTS.md and USER.md to ~/.picobot/ if not exist
+        ensure_default_config_files();
+
         // Get provider config for SessionManager
         let mut provider_config = config.get_provider_config("default")?;
         // Override workspace_dir with the ensured path
@@ -347,3 +350,32 @@ pub async fn run(host: Option<String>, port: Option<u16>) -> Result<(), Box<dyn
 
     Ok(())
 }
+
+/// Release default AGENTS.md and USER.md templates to ~/.picobot/ if not already present.
+fn ensure_default_config_files() {
+    let picobot_dir = dirs::home_dir().unwrap_or_default().join(".picobot");
+    if let Err(e) = std::fs::create_dir_all(&picobot_dir) {
+        tracing::warn!(dir = %picobot_dir.display(), error = %e, "Failed to create ~/.picobot directory");
+        return;
+    }
+
+    let agents_path = picobot_dir.join("AGENTS.md");
+    if !agents_path.exists() {
+        let content = include_str!("../../resources/templates/AGENTS.md");
+        if let Err(e) = std::fs::write(&agents_path, content) {
+            tracing::warn!(path = %agents_path.display(), error = %e, "Failed to write AGENTS.md template");
+        } else {
+            tracing::info!(path = %agents_path.display(), "Released default AGENTS.md template");
+        }
+    }
+
+    let user_path = picobot_dir.join("USER.md");
+    if !user_path.exists() {
+        let content = include_str!("../../resources/templates/USER.md");
+        if let Err(e) = std::fs::write(&user_path, content) {
+            tracing::warn!(path = %user_path.display(), error = %e, "Failed to write USER.md template");
+        } else {
+            tracing::info!(path = %user_path.display(), "Released default USER.md template");
+        }
+    }
+}