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
```

Assets/Script/技能脚本/ArcherSkill.cs

@@ -0,0 +1,49 @@
+using System.Collections;
+using UnityEngine;
+
+public class ArcherSkill : UnitSkill
+{
+    [Min(1)]
+    public int volleyArrowCount = 3;
+
+    [Min(0f)]
+    public float volleyArrowDamageMultiplier = 0.7f;
+
+    [Min(0f)]
+    public float volleyArrowInterval = 0.15f;
+
+    private Coroutine volleyCoroutine;
+
+    public override void ReleaseSkill()
+    {
+        if (volleyCoroutine != null)
+        {
+            StopCoroutine(volleyCoroutine);
+        }
+
+        volleyCoroutine = StartCoroutine(FireVolley());
+    }
+
+    private IEnumerator FireVolley()
+    {
+        for (int i = 0; i < volleyArrowCount; i++)
+        {
+            // 三连射优先攻击当前目标；目标阵亡后剩余箭矢改打最近敌人。
+            GameObject volleyTarget = unit.Target != null ? unit.Target : FindNearestOpponent();
+            if (volleyTarget == null)
+            {
+                break;
+            }
+
+            unit.FireSkillProjectile(volleyTarget, volleyArrowDamageMultiplier);
+            yield return new WaitForSeconds(volleyArrowInterval);
+        }
+
+        volleyCoroutine = null;
+    }
+
+    private GameObject FindNearestOpponent()
+    {
+        return unit.FindNearestEnemyForSkill();
+    }
+}