diff --git a/src/main.rs b/src/main.rs
index ca6b3bf..9305f0c 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -15,7 +15,7 @@ use db::Database;
 use llm::{Conversation, ConversationConfig, DEFAULT_SYSTEM_PROMPT, ToolExecutor, Usage};
 use std::sync::Arc;
 use tools::approval::{ApprovalDecision, ApprovalManager};
-use tools::skill::ExecutionContext;
+use tools::types::ExecutionContext;
 use tracing::{error, info};
 use wechat::client::WeChatClient;
 
@@ -293,7 +293,7 @@ async fn cmd_listen(
         let session = conv.session();
         let approval = approval_manager.clone();
         let memory_store = memory_store.clone();
-        let send_wechat: tools::skill::WechatSender = {
+        let send_wechat: tools::types::WechatSender = {
             let client = client.clone();
             Arc::new(move |user_id: &str, text: &str| {
                 let client = client.clone();
@@ -816,7 +816,7 @@ async fn cmd_send(
 }
 
 
-use tools::skill::SkillResult;
+use tools::types::SkillResult;
 
 async fn builtin_approve(ctx: &ExecutionContext, name: &str) -> Result<bool, String> {
     let manager = match ctx.approval_manager.as_ref() {
@@ -841,10 +841,10 @@ async fn builtin_approve(ctx: &ExecutionContext, name: &str) -> Result<bool, Str
     }
 }
 
-fn build_capability_list(specs: &[tools::skill::SkillSpec]) -> String {
+fn build_capability_list(specs: &[tools::types::SkillSpec]) -> String {
     let mut lines = vec!["📋 可用工具:".to_string()];
     for spec in specs {
-        let risk = if spec.risk_level == tools::skill::RiskLevel::High {
+        let risk = if spec.risk_level == tools::types::RiskLevel::High {
             " ⚠️需确认"
         } else {
             ""
diff --git a/src/tools/builtin.rs b/src/tools/builtin.rs
index 3d89a7d..04ff1ef 100644
--- a/src/tools/builtin.rs
+++ b/src/tools/builtin.rs
@@ -1,4 +1,4 @@
-use crate::tools::skill::{RiskLevel, SkillResult};
+use crate::tools::types::{RiskLevel, SkillResult};
 use chrono::Local;
 
 /// 内置工具执行器：统一处理参数校验、执行、错误返回
@@ -18,16 +18,16 @@ impl BuiltinRegistry {
     }
 
     /// 返回所有内置工具的 spec 列表
-    pub fn specs() -> Vec<super::skill::SkillSpec> {
+    pub fn specs() -> Vec<super::types::SkillSpec> {
         vec![
-            super::skill::SkillSpec {
+            super::types::SkillSpec {
                 name: "get_current_datetime".into(),
                 description: "获取当前日期时间（北京时间 UTC+8）".into(),
                 risk_level: RiskLevel::Low,
                 parameters: serde_json::json!({"type":"object","properties":{"format":{"type":"string"}}}),
                 timeout_secs: 5,
             },
-            super::skill::SkillSpec {
+            super::types::SkillSpec {
                 name: "manage_memos".into(),
                 description: "管理备忘录：添加/列出/删除。高风险操作（add/delete）需确认".into(),
                 risk_level: RiskLevel::Low,
diff --git a/src/tools/mod.rs b/src/tools/mod.rs
index 0c2f5a9..a950927 100644
--- a/src/tools/mod.rs
+++ b/src/tools/mod.rs
@@ -1,4 +1,4 @@
 pub mod approval;
 pub mod builtin;
-pub mod skill;
+pub mod types;
 pub mod weather;
diff --git a/src/tools/skill.rs b/src/tools/types.rs
similarity index 65%
rename from src/tools/skill.rs
rename to src/tools/types.rs
index 2564dcd..b6de0f9 100644
--- a/src/tools/skill.rs
+++ b/src/tools/types.rs
@@ -32,8 +32,12 @@ pub struct SkillSpec {
     pub timeout_secs: u64,
 }
 
-fn default_risk_level() -> RiskLevel { RiskLevel::Low }
-fn default_timeout() -> u64 { 30 }
+fn default_risk_level() -> RiskLevel {
+    RiskLevel::Low
+}
+fn default_timeout() -> u64 {
+    30
+}
 
 // ─── 工具执行结果 ───
 
@@ -47,29 +51,51 @@ pub struct SkillResult {
 
 impl SkillResult {
     pub fn ok(output: impl Into<String>) -> Self {
-        Self { success: true, output: output.into(), data: None }
+        Self {
+            success: true,
+            output: output.into(),
+            data: None,
+        }
     }
 
     pub fn ok_with_data(output: impl Into<String>, data: serde_json::Value) -> Self {
-        Self { success: true, output: output.into(), data: Some(data) }
+        Self {
+            success: true,
+            output: output.into(),
+            data: Some(data),
+        }
     }
 
     pub fn rejected(skill_name: &str) -> Self {
-        Self { success: false, output: format!("用户拒绝了你的调用：{}", skill_name), data: None }
+        Self {
+            success: false,
+            output: format!("用户拒绝了你的调用：{}", skill_name),
+            data: None,
+        }
     }
 
     pub fn expired(skill_name: &str) -> Self {
-        Self { success: false, output: format!("用户没有确认操作：{}", skill_name), data: None }
+        Self {
+            success: false,
+            output: format!("用户没有确认操作：{}", skill_name),
+            data: None,
+        }
     }
 
     pub fn error(msg: impl Into<String>) -> Self {
-        Self { success: false, output: msg.into(), data: None }
+        Self {
+            success: false,
+            output: msg.into(),
+            data: None,
+        }
     }
 }
 
 // ─── 执行上下文 ───
 
-pub type WechatSender = Arc<dyn Fn(&str, &str) -> Pin<Box<dyn Future<Output = Result<(), String>> + Send>> + Send + Sync>;
+pub type WechatSender = Arc<
+    dyn Fn(&str, &str) -> Pin<Box<dyn Future<Output = Result<(), String>> + Send>> + Send + Sync,
+>;
 
 pub struct ExecutionContext {
     pub user_id: String,
@@ -79,7 +105,11 @@ pub struct ExecutionContext {
 
 impl ExecutionContext {
     pub fn new(user_id: impl Into<String>) -> Self {
-        Self { user_id: user_id.into(), approval_manager: None, send_wechat: None }
+        Self {
+            user_id: user_id.into(),
+            approval_manager: None,
+            send_wechat: None,
+        }
     }
 
     pub fn with_approval(mut self, mgr: Arc<crate::tools::approval::ApprovalManager>) -> Self {
diff --git a/src/tools/weather.rs b/src/tools/weather.rs
index 73a5e37..d291941 100644
--- a/src/tools/weather.rs
+++ b/src/tools/weather.rs
@@ -19,7 +19,7 @@ use std::collections::HashMap;
 use std::sync::Mutex;
 use std::time::{Duration, Instant};
 
-use crate::tools::skill::{RiskLevel, SkillResult, SkillSpec};
+use crate::tools::types::{RiskLevel, SkillResult, SkillSpec};
 
 // ═══════════════════════════════════════════════
 // JWT 认证