diff --git a/.ai-assistents/README.md b/.ai-assistents/README.md
index f6b14f4..ae7dd1d 100644
--- a/.ai-assistents/README.md
+++ b/.ai-assistents/README.md
@@ -20,6 +20,9 @@ Other files you should read and in git system also:
 
 - [TODO](TODO.md)
 
+And, use standard docstring format for docs.rs in source code. You should check and fix for this at any time. If no need, do not add other comments.
+> Docstring must be written in English.
+
 ## Upstream APIs/SDKs 上游API/SDK
 
 > Only APIs/SDKs worth remembering are listed here.
diff --git a/.ai-assistents/TODO.md b/.ai-assistents/TODO.md
index c4b25f9..d4c3fde 100644
--- a/.ai-assistents/TODO.md
+++ b/.ai-assistents/TODO.md
@@ -1,5 +1,22 @@
 # To-dos
 
-Empty at present. Should it be generated now?
+- [x] Initialize project structure (`main.rs`, `chat.rs`, `mcp.rs`, `knowledge.rs`, `config.rs`)
+> 初始化项目结构
 
-Translations follow "Description" section in [README](README.md).
\ No newline at end of file
+- [ ] Define configuration schema in `config.rs` (load from YAML/ENV) [In Progress]
+> 定义配置结构
+
+- [ ] Implement MCP tool registration and execution in `mcp.rs` using `mcp-sdk-rs`
+> 使用 `mcp-sdk-rs` 在 `mcp.rs` 中实现 MCP 工具注册和执行
+
+- [ ] Set up basic dialog management in `chat.rs` using `rig`
+> 使用 `rig` 在 `chat.rs` 中设置基本对话管理
+
+- [ ] Implement knowledge base interface in `knowledge.rs`
+> 在 `knowledge.rs` 中实现知识库接口
+
+- [ ] Integrate all components in `main.rs` to create a working CLI chat bot
+> 在 `main.rs` 中集成所有组件以创建可工作的 CLI 聊天机器人
+
+- [ ] Add unit tests for each module
+> 为每个模块添加单元测试
\ No newline at end of file
diff --git a/Cargo.toml b/Cargo.toml
index a89d45b..660915a 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -6,3 +6,6 @@ edition = "2024"
 [dependencies]
 mcp-sdk-rs = "0.3.4"
 rig-core = "0.31.0"
+serde = { version = "1.0", features = ["derive"] }
+serde_yaml = "0.9"
+tokio = { version = "1.0", features = ["full"] }
diff --git a/config.yaml b/config.yaml
new file mode 100644
index 0000000..362a031
--- /dev/null
+++ b/config.yaml
@@ -0,0 +1,7 @@
+llm:
+  provider: "openai"
+  model: "gpt-4o"
+  api_key: "your-api-key-here"
+mcp:
+  servers:
+    - "http://localhost:3000"
diff --git a/src/chat.rs b/src/chat.rs
new file mode 100644
index 0000000..b831753
--- /dev/null
+++ b/src/chat.rs
@@ -0,0 +1,11 @@
+//! Dialog management for the LLM chat.
+
+pub struct ChatManager {
+    // TODO: Add chat manager fields
+}
+
+impl ChatManager {
+    pub fn new() -> Self {
+        ChatManager {}
+    }
+}
diff --git a/src/config.rs b/src/config.rs
new file mode 100644
index 0000000..91b8e76
--- /dev/null
+++ b/src/config.rs
@@ -0,0 +1,42 @@
+use serde::{Deserialize, Serialize};
+use std::fs;
+use std::path::Path;
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct Config {
+    pub llm: LlmConfig,
+    pub mcp: Option<McpConfig>,
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct LlmConfig {
+    pub provider: String,
+    pub model: String,
+    pub api_key: Option<String>,
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct McpConfig {
+    pub servers: Vec<String>,
+}
+
+impl Config {
+    pub fn load() -> Result<Self, Box<dyn std::error::Error>> {
+        let config_path = "config.yaml";
+        if Path::new(config_path).exists() {
+            let content = fs::read_to_string(config_path)?;
+            let config: Config = serde_yaml::from_str(&content)?;
+            Ok(config)
+        } else {
+            // Provide a default or return error
+            Ok(Config {
+                llm: LlmConfig {
+                    provider: "openai".to_string(),
+                    model: "gpt-4".to_string(),
+                    api_key: None,
+                },
+                mcp: None,
+            })
+        }
+    }
+}
diff --git a/src/knowledge.rs b/src/knowledge.rs
new file mode 100644
index 0000000..9dab12d
--- /dev/null
+++ b/src/knowledge.rs
@@ -0,0 +1,11 @@
+//! Knowledge services management.
+
+pub struct KnowledgeManager {
+    // TODO: Add knowledge manager fields
+}
+
+impl KnowledgeManager {
+    pub fn new() -> Self {
+        KnowledgeManager {}
+    }
+}
diff --git a/src/main.rs b/src/main.rs
index e7a11a9..eeadeae 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,3 +1,27 @@
-fn main() {
-    println!("Hello, world!");
+mod chat;
+mod config;
+mod knowledge;
+mod mcp;
+
+use chat::ChatManager;
+use config::Config;
+use knowledge::KnowledgeManager;
+use mcp::McpManager;
+
+#[tokio::main]
+async fn main() -> Result<(), Box<dyn std::error::Error>> {
+    println!("Initializing llm-chat-core...");
+
+    // Initialize configuration
+    let _config = Config::load()?;
+    println!("Configuration loaded: {:?}", _config);
+
+    // Initialize managers
+    let _mcp_manager = McpManager::new();
+    let _knowledge_manager = KnowledgeManager::new();
+    let _chat_manager = ChatManager::new();
+
+    println!("Core initialized successfully.");
+    
+    Ok(())
 }
diff --git a/src/mcp.rs b/src/mcp.rs
new file mode 100644
index 0000000..1726ff9
--- /dev/null
+++ b/src/mcp.rs
@@ -0,0 +1,11 @@
+//! MCP (Model Context Protocol) tool services management.
+
+pub struct McpManager {
+    // TODO: Add MCP manager fields
+}
+
+impl McpManager {
+    pub fn new() -> Self {
+        McpManager {}
+    }
+}