diff --git a/hwe/sammo/API/Global/GetConst.php b/hwe/sammo/API/Global/GetConst.php
new file mode 100644
index 00000000..be599f33
--- /dev/null
+++ b/hwe/sammo/API/Global/GetConst.php
@@ -0,0 +1,306 @@
+<?php
+
+namespace sammo\API\Global;
+
+use sammo\Session;
+use DateTimeInterface;
+use sammo\VersionGit;
+use Nette\Caching\Cache;
+use RuntimeException;
+use sammo\APICacheResult;
+use sammo\CityConst;
+use sammo\GameConst;
+use sammo\GameUnitConst;
+use sammo\Json;
+use sammo\TimeUtil;
+use sammo\UniqueConst;
+
+use function sammo\prepareDir;
+
+class GetConst extends \sammo\BaseAPI
+{
+    /** 반환하는 StaticValues 타입이 달라지면 +1 */
+    const CONST_API_VERSION = 1;
+    const CACHE_KEY = 'JSConst';
+
+    private ?string $cacheKey = null;
+
+    public function __construct(string $rootPath, array $args)
+    {
+        parent::__construct($rootPath, $args);
+    }
+
+    public function validateArgs(): ?string
+    {
+        return null;
+    }
+
+    public function getRequiredSessionMode(): int
+    {
+        return static::REQ_LOGIN;
+    }
+
+    public function findLastModified(): ?int
+    {
+        $rawResult = explode("\n", shell_exec('git status -u -s --no-rename'));
+        $files = [];
+        foreach ($rawResult as $rawLine) {
+            if (strlen($rawLine) < 3) {
+                continue;
+            }
+            $filePath = trim(substr($rawLine, 3));
+            if ($filePath[0] == '"') {
+                $filePath = substr($filePath, 1, strlen($filePath) - 2);
+            }
+            if (!file_exists($filePath)) {
+                continue;
+            }
+            $files[] = $filePath;
+        }
+
+        $lastModified = null;
+        foreach ($files as $filePath) {
+            $fileModified = filemtime($filePath);
+            if ($fileModified === false) {
+                continue;
+            }
+            if ($lastModified === null) {
+                $lastModified = $fileModified;
+                continue;
+            }
+            if ($lastModified > $fileModified) {
+                continue;
+            }
+            $lastModified = $fileModified;
+        }
+        if ($lastModified === null) {
+            return null;
+        }
+        return $lastModified;
+    }
+
+    public function getCacheKey(): string
+    {
+        if ($this->cacheKey !== null) {
+            return $this->cacheKey;
+        }
+
+        if (is_subclass_of('\\sammo\\VersionGit', '\\sammo\VersionGitDynamic')) {
+            $lastModified = $this->findLastModified();
+            if ($lastModified !== null) {
+                $versionHash = "lt{$lastModified}";
+            } else {
+                $versionHash = VersionGit::getHash();
+            }
+        } else {
+            $versionHash = VersionGit::getHash();
+        }
+
+        $apiVersion = static::CONST_API_VERSION;
+        $serverID = UniqueConst::$serverID;
+
+
+        $cacheKey = "{$apiVersion}_{$serverID}_{$versionHash}";
+        $this->cacheKey = $cacheKey;
+
+        return $cacheKey;
+    }
+
+    public function tryCache(): ?APICacheResult
+    {
+        if (is_subclass_of('\\sammo\\VersionGit', '\\sammo\VersionGitDynamic')) {
+            return new APICacheResult(TimeUtil::secondsToDateTime($this->findLastModified(), true, true));
+        }
+
+        return new APICacheResult(null, $this->getCacheKey());
+    }
+
+    public function readCache(Cache $cache): null|string|array|int|float|bool
+    {
+        $rawJSONCache = $cache->load(static::CACHE_KEY);
+        if ($rawJSONCache === null) {
+            return null;
+        }
+        $jsonCache = Json::decode($rawJSONCache);
+        if (!key_exists('cacheKey', $jsonCache)) {
+            return null;
+        }
+
+        $jsonCacheKey = $jsonCache['cacheKey'];
+        if ($jsonCacheKey !== $this->getCacheKey()) {
+            return null;
+        }
+
+        return $jsonCache['data'] ?? null;
+    }
+
+    public function extractObjClassInfo(string $objKey, callable $callerFunction): array
+    {
+        /** @var \sammo\iAction */
+        $target = $callerFunction($objKey);
+        if (!($target instanceof \sammo\iAction)) {
+            throw new \RuntimeException("{$objKey}의 대상이 iAction이 아님");
+        }
+        return [
+            'value' => $objKey,
+            'name' => $target->getName(),
+            'info' => $target->getInfo(),
+        ];
+    }
+
+    public function extractObjClassInfoFromArray(array $constArray, callable $callerFunction): array
+    {
+        $result = [];
+        foreach ($constArray as $key => $target) {
+            if (is_string($target)) {
+                $actionInfo = $this->extractObjClassInfo($target, $callerFunction);
+                if (is_string($key)) {
+                    $result[$key] = $actionInfo;
+                } else {
+                    $result[$target] = $actionInfo;
+                }
+                continue;
+            }
+            if (is_array($target)) {
+                $result[$key] = $this->extractObjClassInfoFromArray($target, $callerFunction);
+                continue;
+            }
+            if(is_string($key) && is_int($target)){
+                //역전된 상황이다.
+                $result[$key] = $this->extractObjClassInfo($key, $callerFunction);
+                continue;
+            }
+            $result[$key] = $target;
+        }
+        return $result;
+    }
+
+    public function extractObjClassInfoFromGameConst(string $gameConstKey, callable $callerFunction): array
+    {
+        $gameConstKeyList = explode(".", $gameConstKey);
+        $target = (GameConst::${$gameConstKeyList[0]}) ?? [];
+        foreach(\array_slice($gameConstKeyList, 1) as $gameConstSubKey){
+            $target = $target[$gameConstSubKey] ?? [];
+        }
+
+        if (is_string($target)) {
+            return $this->extractObjClassInfo($target, $callerFunction);
+        }
+
+        if (!is_array($target)) {
+            throw new \RuntimeException("GameConst::{$gameConstKey}의 값이 {$target}임");
+        }
+
+        return $this->extractObjClassInfoFromArray($target, $callerFunction);
+    }
+
+    public function genConstData()
+    {
+        $gameConstKeys = [
+            'nationType' => [
+                '\sammo\buildNationTypeClass',
+                ['availableNationType', 'neutralNationType']
+            ],
+            'specialDomestic' => [
+                '\sammo\buildGeneralSpecialDomesticClass',
+                ['defaultSpecialDomestic', 'availableSpecialDomestic', 'optionalSpecialDomestic']
+            ],
+            'specialWar' => [
+                '\sammo\buildGeneralSpecialWarClass',
+                ['defaultSpecialWar', 'availableSpecialWar', 'optionalSpecialWar']
+            ],
+            'personality' => [
+                '\sammo\buildPersonalityClass',
+                ['neutralPersonality', 'availablePersonality', 'optionalPersonality']
+            ],
+            'item' => [
+                '\sammo\buildItemClass',
+                ['allItems'],
+                1
+            ],
+        ];
+        //GameConst 중 BaseCommand는 시간 흐름, 장수에 따라 정보가 달라지므로 따로 처리해야함
+
+
+        $iActionInfo = [];
+        $iActionKeyMap = [];
+        foreach ($gameConstKeys as $mappedKey => $callerTarget) {
+            $flatLevel = 0;
+            if (is_array($callerTarget)) {
+                $callerFunction = $callerTarget[0];
+                $gameConstSubKey = $callerTarget[1];
+                if(count($callerTarget) > 2){
+                    /** @var int */
+                    $flatLevel = $callerTarget[2];
+                }
+            } else {
+                $gameConstSubKey = [$mappedKey];
+                $callerFunction = $callerTarget;
+            }
+
+            if (!is_callable($callerFunction)) {
+                throw new \RuntimeException("{$mappedKey} => {$callerFunction}이 callable이 아님");
+            }
+
+            $actionInfo = [];
+            foreach ($gameConstSubKey as $key) {
+                $appendInfo = $this->extractObjClassInfoFromGameConst($key, $callerFunction);
+                $actionInfo = array_merge($actionInfo, $appendInfo);
+                $iActionKeyMap[$key] = $mappedKey;
+            }
+
+            if($flatLevel > 0){
+                foreach(range(0, $flatLevel - 1) as $tryFlatLevel){
+                    $actionInfo = array_merge(...array_values($actionInfo));
+                }
+            }
+
+
+            $iActionInfo[$mappedKey] = $actionInfo;
+        }
+        return [
+            'gameConst' => get_class_vars('\sammo\GameConst'),
+            'gameUnitConst' => GameUnitConst::all(),
+            'cityConst' => CityConst::all(),
+            'cityConstMap' => [
+                'region' => CityConst::$regionMap,
+                'level' => CityConst::$levelMap,
+            ],
+            'iActionInfo' => $iActionInfo,
+            'iActionKeyMap' => $iActionKeyMap,
+        ];
+    }
+
+    public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag)
+    {
+        $cacheDir = $this->rootPath . '/data/file_cache';
+
+        if (!prepareDir($cacheDir)) {
+            throw new RuntimeException('cache 폴더 없음');
+        }
+        $storage = new \Nette\Caching\Storages\FileStorage($cacheDir);
+        $cache = new Cache($storage);
+
+
+        $constCache = $this->readCache($cache);
+        if ($constCache !== null) {
+            return [
+                'result' => true,
+                'cacheKey' => $this->getCacheKey(),
+                'data' => $constCache,
+            ];
+        }
+
+        $constCache = $this->genConstData();
+        $cache->save(static::CACHE_KEY, Json::encode([
+            'cacheKey' => $this->getCacheKey(),
+            'data' => $constCache
+        ]));
+
+        return [
+            'result' => true,
+            'cacheKey' => $this->getCacheKey(),
+            'data' => $constCache,
+        ];
+    }
+}