diff --git a/src-tauri/src/commands/ai/code_intel.rs b/src-tauri/src/commands/ai/code_intel.rs
index 60b70b0..2d05771 100644
--- a/src-tauri/src/commands/ai/code_intel.rs
+++ b/src-tauri/src/commands/ai/code_intel.rs
@@ -131,8 +131,9 @@ const FUNCTION_VALUE_KINDS: &[&str] = &["arrow_function", "function", "generator
 ///
 /// variable_declarator 单看 kind 过宽:`let msg = "fn main() {}"` 这类普通声明也命中,
 /// contains_definition 会对几乎任何 JS/TS 文件误报提示。收窄为 `const fn = () => {}`
-/// 形态(初始化值是函数/类表达式)才算定义,contains_definition / read_symbol /
-/// outline 三处共用同一判定。
+/// 形态(初始化值本身是函数/类表达式)才算定义,contains_definition / read_symbol /
+/// outline 三处共用同一判定。判定看 value 节点自身 kind 而非子树包含——
+/// `const x = arr.map(n => ...)` 子树含 arrow_function,但 x 不是函数定义。
 fn is_definition_node(node: &Node<'_>) -> bool {
     if !DEFINITION_KINDS.contains(&node.kind()) {
         return false;
@@ -141,25 +142,11 @@ fn is_definition_node(node: &Node<'_>) -> bool {
         return true;
     }
     match node.child_by_field_name("value") {
-        Some(v) => subtree_contains_kind(v, FUNCTION_VALUE_KINDS),
+        Some(v) => FUNCTION_VALUE_KINDS.contains(&v.kind()),
         None => false,
     }
 }
 
-/// 子树内是否含任一目标 kind 节点
-fn subtree_contains_kind(node: Node<'_>, kinds: &[&str]) -> bool {
-    if kinds.contains(&node.kind()) {
-        return true;
-    }
-    let mut cursor = node.walk();
-    for child in node.children(&mut cursor) {
-        if subtree_contains_kind(child, kinds) {
-            return true;
-        }
-    }
-    false
-}
-
 /// 递归遍历语法树,判断是否含任一定义节点(contains_definition 的遍历内核)。
 fn tree_has_definition(node: &Node<'_>) -> bool {
     if is_definition_node(node) {