diff --git a/hwe/sammo/SpecialityConst.php b/hwe/sammo/SpecialityConst.php
new file mode 100644
index 00000000..8d1913b7
--- /dev/null
+++ b/hwe/sammo/SpecialityConst.php
@@ -0,0 +1,213 @@
+<?php
+namespace sammo;
+
+//TODO: 나중에는 각 내특, 전특이 클래스로 가야함
+class SpecialityConst{
+    //const GENERIC = 0x0;
+    const DISABLED = 0x1;
+
+    const STAT_LEADERSHIP = 0x2;
+    const STAT_POWER = 0x4;
+    const STAT_INTEL = 0x8;
+
+    const ARMY_FOOTMAN = 0x100;
+    const ARMY_ARCHER = 0x200;
+    const ARMY_CAVALRY = 0x400;
+    const ARMY_WIZARD = 0x800;
+    const ARMY_SIEGE = 0x1000;
+
+    const REQ_DEXTERITY = 0x4000;
+
+    private $invDomestic = null;
+    private $invWar = null;
+
+    private function __construct(){
+    }
+
+    //음수 : 절대값 %, 양수 : 상대적 비중
+    const DOMESTIC = [
+        1 => ['경작', 1, self::STAT_INTEL],
+        2 => ['상재', 1, self::STAT_INTEL],
+        3 => ['발명', 1, self::STAT_INTEL],
+
+        10 => ['축성', 1, self::STAT_POWER],
+        11 => ['수비', 1, self::STAT_POWER],
+        12 => ['통찰', 1, self::STAT_POWER],
+
+        20 => ['인덕', 1, self::STAT_LEADERSHIP],
+
+        30 => ['거상', -2.5, self::DISABLED],
+        31 => ['귀모', -2.5, self::STAT_LEADERSHIP | self::STAT_POWER | self::STAT_INTEL],
+    ];
+
+    const WAR = [
+        40 => ['귀병', 1, self::STAT_INTEL | self::ARMY_WIZARD | self::REQ_DEXTERITY],
+
+        41 => ['신산', 1, self::STAT_INTEL | self::ARMY_WIZARD],
+        42 => ['환술', -5, self::STAT_INTEL | self::ARMY_WIZARD],
+        43 => ['집중', 1, self::STAT_INTEL | self::ARMY_WIZARD],
+        44 => ['신중', 1, self::STAT_INTEL | self::ARMY_WIZARD],
+        45 => ['반계', 1, self::STAT_INTEL | self::ARMY_WIZARD],
+
+        50 => ['보병', 1, self::STAT_LEADERSHIP | self::STAT_POWER | self::REQ_DEXTERITY | self::ARMY_FOOTMAN],
+        51 => ['궁병', 1, self::STAT_LEADERSHIP | self::STAT_POWER | self::REQ_DEXTERITY | self::ARMY_ARCHER],
+        52 => ['기병', 1, self::STAT_LEADERSHIP | self::STAT_POWER | self::REQ_DEXTERITY | self::ARMY_CAVALRY],
+        53 => ['공성', 1, self::STAT_LEADERSHIP | self::STAT_POWER | self::REQ_DEXTERITY | self::ARMY_SIEGE],
+
+        60 => ['돌격', 1, self::STAT_LEADERSHIP | self::STAT_POWER],
+        61 => ['무쌍', 1, self::STAT_LEADERSHIP | self::STAT_POWER],
+        62 => ['견고', 1, self::STAT_LEADERSHIP | self::STAT_POWER],
+        63 => ['위압', 1, self::STAT_LEADERSHIP | self::STAT_POWER],
+
+        70 => ['저격', 1, self::STAT_LEADERSHIP | self::STAT_POWER | self::STAT_INTEL],
+        71 => ['필살', 1, self::STAT_LEADERSHIP | self::STAT_POWER | self::STAT_INTEL],
+        72 => ['징병', 1, self::STAT_LEADERSHIP | self::STAT_POWER | self::STAT_INTEL],
+        73 => ['의술', -2, self::STAT_LEADERSHIP | self::STAT_POWER | self::STAT_INTEL],
+        74 => ['격노', 1, self::STAT_LEADERSHIP | self::STAT_POWER | self::STAT_INTEL],
+        75 => ['척사', 1, self::STAT_LEADERSHIP | self::STAT_POWER | self::STAT_INTEL],
+    ];
+
+    public static function getInvDomestic(string $name){
+        if(static::$invDomestic !== null){
+            return static::$invDomestic[$name]??null;
+        }
+
+        $invDomestic = [];
+        foreach(static::DOMESTIC as $key=>$val){
+            $nameKey = $val[0];
+            $val[0] = $key;
+            $invDomestic[$nameKey] = $val;
+        }
+        static::$invDomestic = $invDomestic;
+
+        return static::$invDomestic[$name]??null;
+    }
+
+    public static function getInvWar(string $name){
+        if(static::$invWar !== null){
+            return static::$invWar[$name]??null;
+        }
+
+        $invWar = [];
+        foreach(static::War as $key=>$val){
+            $nameKey = $val[0];
+            $val[0] = $key;
+            $invWar[$nameKey] = $val;
+        }
+        static::$invWar = $invWar;
+
+        return static::$invWar[$name]??null;
+    }
+
+    private static function calcCondGeneric(array $general) : int {
+        $myCond = 0;
+        
+        if ($leader * 0.95 > $power && $leader * 0.95 > $intel) {
+            $myCond |= STAT_LEADERSHIP;
+        }
+        else if($power >= $intel){
+            $myCond |= STAT_POWER;
+        }
+        else {
+            $myCond |= STAT_INTEL;
+        }
+
+        return $myCond;
+    }
+
+    private static function calcCondDexterity(array $general) : int {
+        $dex = [
+            static::ARMY_FOOTMAN => $general['dex0'],
+            static::ARMY_ARCHER => $general['dex10'],
+            static::ARMY_CAVALRY => $general['dex20'],
+            static::ARMY_WIZARD => $general['dex30'],
+            static::ARMY_SIEGE => $general['dex40'],
+        ];
+
+        $dexSum = array_sum($dex);
+        $dexBase = Util::round(sqrt($dexSum) / 4);
+
+        if(Util::randBool(0.8)){
+            return 0;
+        }
+
+        if(mt_rand(0, 99) < $dexBase){
+            return 0;
+        }
+
+        if($dexSum){
+            return array_rand($dex);
+        }
+
+        return array_keys($dex, max($dex))[0];
+    }
+
+    public static function pickSpecialDomestic(array $general) : int{
+        $pAbs = [];
+        $pRel = [];
+
+        $myCond = static::calcCondGeneric($general);
+
+        foreach(self::DOMESTIC as $id=>list($name, $weight, $cond)){
+            if(!($cond & $myCond)){
+                continue;
+            }
+
+            if($weight < 0){
+                $pAbs[$id] = -$weight;
+            }
+            else{
+                $pRel[$id] = $weight;
+            }
+        }
+        
+        if($pAbs){
+            $pAbs[0] = max(0, 100 - array_sum($pAbs));
+            $id = Util::choiceRandomUsingWeight($pAbs);
+            if($id){
+                return $id;
+            }
+        }
+
+        return Util::choiceRandomUsingWeight($pRel);
+    }
+
+    public static function pickSpecialWar(array $general) : int{
+        $reqDex = [];
+        $pAbs = [];
+        $pRel = [];
+
+        $myCond = static::calcCondGeneric($general);
+        $myCond |= static::calcCondDexterity($general);
+
+        foreach(self::WAR as $id=>list($name, $weight, $cond)){
+            if(!($cond & $myCond)){
+                continue;
+            }
+
+            if($cond & self::REQ_DEXTERITY){
+                $reqDex[$id] = $weight;
+            }
+            else if($weight < 0){
+                $pAbs[$id] = -$weight;
+            }
+            else{
+                $pRel[$id] = $weight;
+            }
+        }
+
+        if($reqDex){
+            return Util::choiceRandomUsingWeight($reqDex);
+        }
+
+        if($pAbs){
+            $pAbs[0] = max(0, 100 - array_sum($pAbs));
+            $id = Util::choiceRandomUsingWeight($pAbs);
+            if($id){
+                return $id;
+            }
+        }
+
+        return Util::choiceRandomUsingWeight($pRel);
+    }
+}
\ No newline at end of file