diff --git a/hwe/sammo/DefaultActionTrigger.php b/hwe/sammo/DefaultActionTrigger.php
new file mode 100644
index 00000000..f05513ad
--- /dev/null
+++ b/hwe/sammo/DefaultActionTrigger.php
@@ -0,0 +1,33 @@
+<?php
+namespace sammo;
+
+trait DefaultActionTrigger{
+    public function onPreTurnExecute(General $general, ?array $nation):array{
+        return [];
+    }
+    public function onCalcDomesticTurnScore(General $general, string $turnType, float $score, float $cost, float $successRate, float $failRate){
+        return [$score, $cost, $successRate, $failRate];
+    }
+
+    public function onPreGeneralStatUpdate(General $general, string $statName, $value){
+        return $value;
+    }
+    
+    public function onCalcStragicDelay(array $nation, int $commandType, int $turn):int{
+        return $turn;
+    }
+
+    public function onCalcNationalIncome(array $nation, string $type, int $amount):int{
+        return $amount;
+    }
+
+    public function getWarPowerMultiplier(WarUnit $unit):array{
+        return [1, 1];
+    }
+    public function getBattleInitSkillTriggerList(WarUnit $unit):array{
+        return [];
+    }
+    public function getBattlePhaseSkillTriggerList(WarUnit $unit):array{
+        return [];
+    }
+}
\ No newline at end of file
diff --git a/hwe/sammo/iActionTrigger.php b/hwe/sammo/iActionTrigger.php
new file mode 100644
index 00000000..68f4537f
--- /dev/null
+++ b/hwe/sammo/iActionTrigger.php
@@ -0,0 +1,23 @@
+<?php
+namespace sammo;
+
+interface iActionTrigger{
+
+    const PRIORITY_BEGIN = 50000;
+    const PRIORITY_PRE   = 40000;
+    const PRIORITY_BODY  = 30000;
+    const PRIORITY_POST  = 20000;
+    const PRIORITY_FINAL = 10000;
+
+    public function onPreTurnExecute(General $general, ?array $nation):array;
+    public function onCalcDomesticTurnScore(General $general, string $turnType, float $score, float $cost, float $successRate, float $failRate):array;
+
+    public function onPreGeneralStatUpdate(General $general, string $statName, $value);
+
+    public function onCalcStragicDelay(array $nation, int $commandType, int $turn):int;
+    public function onCalcNationalIncome(array $nation, string $type, int $amount):int;
+
+    public function getWarPowerMultiplier(WarUnit $unit):array;
+    public function getBattleInitSkillTriggerList(WarUnit $unit):array;
+    public function getBattlePhaseSkillTriggerList(WarUnit $unit):array;
+}
\ No newline at end of file