diff --git a/decision/engine.go b/decision/engine.go
index cc3ea3dc..a6b0113e 100644
--- a/decision/engine.go
+++ b/decision/engine.go
@@ -350,7 +350,7 @@ func buildSystemPrompt(accountEquity float64, btcEthLeverage, altcoinLeverage in
 	sb.WriteString("]\n```\n")
 	sb.WriteString("</decision>\n\n")
 	sb.WriteString("## 字段说明\n\n")
-	sb.WriteString("- `action`: open_long | open_short | close_long | close_short | hold | wait\n")
+	sb.WriteString("- `action`: open_long | open_short | close_long | close_short | update_stop_loss | update_take_profit | partial_close | hold | wait\n")
 	sb.WriteString("- `confidence`: 0-100（开仓建议≥75）\n")
 	sb.WriteString("- 开仓时必填: leverage, position_size_usd, stop_loss, take_profit, confidence, risk_usd, reasoning\n\n")
 
diff --git a/decision/prompt_test.go b/decision/prompt_test.go
new file mode 100644
index 00000000..f8fc1b3b
--- /dev/null
+++ b/decision/prompt_test.go
@@ -0,0 +1,50 @@
+package decision
+
+import (
+	"strings"
+	"testing"
+)
+
+// TestBuildSystemPrompt_ContainsAllValidActions 测试 prompt 是否包含所有有效的 action
+func TestBuildSystemPrompt_ContainsAllValidActions(t *testing.T) {
+	// 这是系统中定义的所有有效 action（来自 validateDecision）
+	validActions := []string{
+		"open_long",
+		"open_short",
+		"close_long",
+		"close_short",
+		"update_stop_loss",
+		"update_take_profit",
+		"partial_close",
+		"hold",
+		"wait",
+	}
+
+	// 构建 prompt
+	prompt := buildSystemPrompt(1000.0, 10, 5, "default")
+
+	// 验证每个有效 action 都在 prompt 中出现
+	for _, action := range validActions {
+		if !strings.Contains(prompt, action) {
+			t.Errorf("Prompt 缺少有效的 action: %s", action)
+		}
+	}
+}
+
+// TestBuildSystemPrompt_ActionListCompleteness 测试 action 列表的完整性
+func TestBuildSystemPrompt_ActionListCompleteness(t *testing.T) {
+	prompt := buildSystemPrompt(1000.0, 10, 5, "default")
+
+	// 检查是否包含关键的缺失 action
+	missingActions := []string{
+		"update_stop_loss",
+		"update_take_profit",
+		"partial_close",
+	}
+
+	for _, action := range missingActions {
+		if !strings.Contains(prompt, action) {
+			t.Errorf("Prompt 缺少关键 action: %s（这会导致 AI 返回无效决策）", action)
+		}
+	}
+}