根据提供的code differences信息，由于没有具体的代码变更内容，我将生成一个通用的commit message模板：

```
docs(readme): 更新文档说明

- 添加项目使用指南
- 完善API接口说明
- 修正错误的配置示例
```

注意：由于您提供的code differences部分为空，以上是一个示例模板。当您有具体的代码变更时，请提供详细的变更内容以便生成更准确的commit message。

Assets/Scripts/技能脚本/CastleMageSkill.cs

@@ -0,0 +1,50 @@
+using System.Collections.Generic;
+using UnityEngine;
+
+public class CastleMageSkill : UnitSkill
+{
+    [Header("小型魔爆参数")]
+    [Min(0.1f)]
+    public float explosionRadius = 1.8f;
+
+    [Min(0f)]
+    public float explosionDamage = 85f;
+
+    public override void ReleaseSkill()
+    {
+        GameObject target = unit.Target;
+        UnitTeam myTeam = unit.GetComponent<UnitTeam>();
+        if (target == null || myTeam == null)
+        {
+            return;
+        }
+
+        Vector3 center = target.transform.position;
+        float radiusSquared = explosionRadius * explosionRadius;
+        HashSet<UnitBase> hitUnits = new HashSet<UnitBase>();
+
+        foreach (UnitTeam opponentTeam in GameObject.FindObjectsOfType<UnitTeam>())
+        {
+            GameObject opponent = opponentTeam.gameObject;
+            if (opponent == null
+                || opponent.transform.root == unit.transform.root
+                || !myTeam.IsEnemy(opponent))
+            {
+                continue;
+            }
+
+            Vector3 offset = opponent.transform.position - center;
+            offset.y = 0f;
+            if (offset.sqrMagnitude > radiusSquared)
+            {
+                continue;
+            }
+
+            UnitBase targetUnit = opponent.GetComponentInParent<UnitBase>();
+            if (targetUnit != null && hitUnits.Add(targetUnit))
+            {
+                targetUnit.ReceiveDamage(explosionDamage, unit.gameObject);
+            }
+        }
+    }
+}