diff --git a/installer/index.html b/installer/index.html
index e14b2cd..44ca5c9 100644
--- a/installer/index.html
+++ b/installer/index.html
@@ -17,7 +17,8 @@
         <li data-step="4">다운로드 및 설치</li>
         <li data-step="5">서버 설정</li>
         <li data-step="6">포트포워딩 설정</li>
-        <li data-step="7">완료</li>
+        <li data-step="7">클라이언트 적용</li>
+        <li data-step="8">완료</li>
       </ol>
     </aside>
 
@@ -115,6 +116,19 @@
 
       <section class="panel" data-panel="7">
         <p class="eyebrow">STEP 7</p>
+        <h2>클라이언트 적용</h2>
+        <p class="infoHint">런처 프로필, 로더 설치, 리소스팩, 쉐이더를 한 번에 적용합니다.</p>
+        <div class="buttonRow">
+          <button id="applyClientButton" class="primary">클라이언트 적용</button>
+        </div>
+        <div id="clientApplyStatus" class="infoBox"></div>
+        <div class="buttonRow between">
+          <button data-back="6">이전</button>
+        </div>
+      </section>
+
+      <section class="panel" data-panel="8">
+        <p class="eyebrow">STEP 8</p>
         <h2>완료</h2>
         <label class="toggleRow">
           <input type="checkbox" id="createShortcutToggle" checked />
diff --git a/installer/renderer.js b/installer/renderer.js
index 58f3fed..7af52fc 100644
--- a/installer/renderer.js
+++ b/installer/renderer.js
@@ -19,6 +19,8 @@ const eulaBlock = document.getElementById('eulaBlock')
 const eulaText = document.getElementById('eulaText')
 const eulaLink = document.getElementById('eulaLink')
 const startInstallButton = document.getElementById('startInstallButton')
+const applyClientButton = document.getElementById('applyClientButton')
+const clientApplyStatus = document.getElementById('clientApplyStatus')
 
 function setActiveStep(step) {
   for (const [key, panel] of panelMap.entries()) {
@@ -275,6 +277,18 @@ document.getElementById('toStep7').addEventListener('click', async () => {
   await goToStep(7)
 })
 
+applyClientButton.addEventListener('click', async () => {
+  applyClientButton.disabled = true
+  clientApplyStatus.textContent = '클라이언트 적용 중입니다.'
+  try {
+    const result = await window.installerApi.applyClient()
+    clientApplyStatus.textContent = result.message
+    await goToStep(result.nextStep)
+  } finally {
+    applyClientButton.disabled = false
+  }
+})
+
 document.getElementById('openFolderButton').addEventListener('click', async () => {
   await window.installerApi.openFolder()
 })
diff --git a/manifest/sample-pack.json b/manifest/sample-pack.json
index c107090..860572c 100644
--- a/manifest/sample-pack.json
+++ b/manifest/sample-pack.json
@@ -1,6 +1,9 @@
 {
   "mcVersion": "1.20.1",
   "recommendedJdkVersion": 17,
+  "loaderType": "vanilla",
+  "loaderVersion": "",
+  "loaderInstallerPath": "",
   "serverMinRam": 2048,
   "serverMaxRam": 4096,
   "clientMinRam": 4096,
@@ -10,5 +13,7 @@
   "configEditableFiles": [
     "server.properties",
     "bukkit.yml"
-  ]
+  ],
+  "resourcePackFiles": [],
+  "shaderPackFiles": []
 }
diff --git a/package-lock.json b/package-lock.json
index 504daa4..abd62b0 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -8,10 +8,12 @@
       "name": "mc-custom-suite",
       "version": "1.0.0",
       "dependencies": {
+        "@types/multer": "^2.1.0",
         "adm-zip": "^0.5.16",
         "ejs": "^3.1.10",
         "express": "^5.1.0",
         "express-session": "^1.18.2",
+        "multer": "^2.1.1",
         "nat-upnp": "^1.1.1"
       },
       "devDependencies": {
@@ -563,7 +565,6 @@
       "version": "1.19.6",
       "resolved": "https://registry.npmjs.org/@types/body-parser/-/body-parser-1.19.6.tgz",
       "integrity": "sha512-HLFeCYgz89uk22N5Qg3dvGvsv46B8GLvKKo1zKG4NybA8U2DiEO3w9lqGg29t/tfLRJpJ6iQxnVw4OnB7MoM9g==",
-      "dev": true,
       "dependencies": {
         "@types/connect": "*",
         "@types/node": "*"
@@ -585,7 +586,6 @@
       "version": "3.4.38",
       "resolved": "https://registry.npmjs.org/@types/connect/-/connect-3.4.38.tgz",
       "integrity": "sha512-K6uROf1LD88uDQqJCktA4yzL1YYAK6NgfsI0v/mTgyPKWsX1CnJ0XPSDhViejru1GcRkLWb8RlzFYJRqGUbaug==",
-      "dev": true,
       "dependencies": {
         "@types/node": "*"
       }
@@ -609,7 +609,6 @@
       "version": "5.0.6",
       "resolved": "https://registry.npmjs.org/@types/express/-/express-5.0.6.tgz",
       "integrity": "sha512-sKYVuV7Sv9fbPIt/442koC7+IIwK5olP1KWeD88e/idgoJqDm3JV/YUiPwkoKK92ylff2MGxSz1CSjsXelx0YA==",
-      "dev": true,
       "dependencies": {
         "@types/body-parser": "*",
         "@types/express-serve-static-core": "^5.0.0",
@@ -620,7 +619,6 @@
       "version": "5.1.1",
       "resolved": "https://registry.npmjs.org/@types/express-serve-static-core/-/express-serve-static-core-5.1.1.tgz",
       "integrity": "sha512-v4zIMr/cX7/d2BpAEX3KNKL/JrT1s43s96lLvvdTmza1oEvDudCqK9aF/djc/SWgy8Yh0h30TZx5VpzqFCxk5A==",
-      "dev": true,
       "dependencies": {
         "@types/node": "*",
         "@types/qs": "*",
@@ -655,8 +653,7 @@
     "node_modules/@types/http-errors": {
       "version": "2.0.5",
       "resolved": "https://registry.npmjs.org/@types/http-errors/-/http-errors-2.0.5.tgz",
-      "integrity": "sha512-r8Tayk8HJnX0FztbZN7oVqGccWgw98T/0neJphO91KkmOzug1KkofZURD4UaD5uH8AqcFLfdPErnBod0u71/qg==",
-      "dev": true
+      "integrity": "sha512-r8Tayk8HJnX0FztbZN7oVqGccWgw98T/0neJphO91KkmOzug1KkofZURD4UaD5uH8AqcFLfdPErnBod0u71/qg=="
     },
     "node_modules/@types/keyv": {
       "version": "3.1.4",
@@ -673,11 +670,18 @@
       "integrity": "sha512-GsCCIZDE/p3i96vtEqx+7dBUGXrc7zeSK3wwPHIaRThS+9OhWIXRqzs4d6k1SVU8g91DrNRWxWUGhp5KXQb2VA==",
       "dev": true
     },
+    "node_modules/@types/multer": {
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/@types/multer/-/multer-2.1.0.tgz",
+      "integrity": "sha512-zYZb0+nJhOHtPpGDb3vqPjwpdeGlGC157VpkqNQL+UU2qwoacoQ7MpsAmUptI/0Oa127X32JzWDqQVEXp2RcIA==",
+      "dependencies": {
+        "@types/express": "*"
+      }
+    },
     "node_modules/@types/node": {
       "version": "24.12.2",
       "resolved": "https://registry.npmjs.org/@types/node/-/node-24.12.2.tgz",
       "integrity": "sha512-A1sre26ke7HDIuY/M23nd9gfB+nrmhtYyMINbjI1zHJxYteKR6qSMX56FsmjMcDb3SMcjJg5BiRRgOCC/yBD0g==",
-      "dev": true,
       "dependencies": {
         "undici-types": "~7.16.0"
       }
@@ -696,14 +700,12 @@
     "node_modules/@types/qs": {
       "version": "6.15.1",
       "resolved": "https://registry.npmjs.org/@types/qs/-/qs-6.15.1.tgz",
-      "integrity": "sha512-GZHUBZR9hckSUhrxmp1nG6NwdpM9fCunJwyThLW1X3AyHgd9IlHb6VANpQQqDr2o/qQp6McZ3y/IA2rVzKzSbw==",
-      "dev": true
+      "integrity": "sha512-GZHUBZR9hckSUhrxmp1nG6NwdpM9fCunJwyThLW1X3AyHgd9IlHb6VANpQQqDr2o/qQp6McZ3y/IA2rVzKzSbw=="
     },
     "node_modules/@types/range-parser": {
       "version": "1.2.7",
       "resolved": "https://registry.npmjs.org/@types/range-parser/-/range-parser-1.2.7.tgz",
-      "integrity": "sha512-hKormJbkJqzQGhziax5PItDUTMAM9uE2XXQmM37dyd4hVM+5aVl7oVxMVUiVQn2oCQFN/LKCZdvSM0pFRqbSmQ==",
-      "dev": true
+      "integrity": "sha512-hKormJbkJqzQGhziax5PItDUTMAM9uE2XXQmM37dyd4hVM+5aVl7oVxMVUiVQn2oCQFN/LKCZdvSM0pFRqbSmQ=="
     },
     "node_modules/@types/responselike": {
       "version": "1.0.3",
@@ -718,7 +720,6 @@
       "version": "1.2.1",
       "resolved": "https://registry.npmjs.org/@types/send/-/send-1.2.1.tgz",
       "integrity": "sha512-arsCikDvlU99zl1g69TcAB3mzZPpxgw0UQnaHeC1Nwb015xp8bknZv5rIfri9xTOcMuaVgvabfIRA7PSZVuZIQ==",
-      "dev": true,
       "dependencies": {
         "@types/node": "*"
       }
@@ -727,7 +728,6 @@
       "version": "2.2.0",
       "resolved": "https://registry.npmjs.org/@types/serve-static/-/serve-static-2.2.0.tgz",
       "integrity": "sha512-8mam4H1NHLtu7nmtalF7eyBH14QyOASmcxHhSfEoRyr0nP/YdoesEtU+uSRvMe96TW/HPTtkoKqQLl53N7UXMQ==",
-      "dev": true,
       "dependencies": {
         "@types/http-errors": "*",
         "@types/node": "*"
@@ -1014,6 +1014,11 @@
         "node": ">=10"
       }
     },
+    "node_modules/append-field": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/append-field/-/append-field-1.0.0.tgz",
+      "integrity": "sha512-klpgFSWLW1ZEs8svjfb7g4qWY0YS5imI82dTg+QahUvJ8YqAY0P10Uk8tTyh9ZGuYEZEMaeJYCF5BFuX552hsw=="
+    },
     "node_modules/argparse": {
       "version": "2.0.1",
       "resolved": "https://registry.npmjs.org/argparse/-/argparse-2.0.1.tgz",
@@ -1219,8 +1224,7 @@
     "node_modules/buffer-from": {
       "version": "1.1.2",
       "resolved": "https://registry.npmjs.org/buffer-from/-/buffer-from-1.1.2.tgz",
-      "integrity": "sha512-E+XQCRwSbaaiChtv6k6Dwgc+bx+Bs6vuKJHHl5kox/BaKbhiXzqQOwK4cO22yElGp2OCmjwVhT3HmxgyPGnJfQ==",
-      "dev": true
+      "integrity": "sha512-E+XQCRwSbaaiChtv6k6Dwgc+bx+Bs6vuKJHHl5kox/BaKbhiXzqQOwK4cO22yElGp2OCmjwVhT3HmxgyPGnJfQ=="
     },
     "node_modules/builder-util": {
       "version": "26.8.1",
@@ -1294,6 +1298,17 @@
         "node": ">= 10.0.0"
       }
     },
+    "node_modules/busboy": {
+      "version": "1.6.0",
+      "resolved": "https://registry.npmjs.org/busboy/-/busboy-1.6.0.tgz",
+      "integrity": "sha512-8SFQbg/0hQ9xy3UNTB0YEnsNBbWfhf7RtnzpL7TkBiTBRfrQ9Fxcnz7VJsleJpyp6rVLvXiuORqjlHi5q+PYuA==",
+      "dependencies": {
+        "streamsearch": "^1.1.0"
+      },
+      "engines": {
+        "node": ">=10.16.0"
+      }
+    },
     "node_modules/bytes": {
       "version": "3.1.2",
       "resolved": "https://registry.npmjs.org/bytes/-/bytes-3.1.2.tgz",
@@ -1503,6 +1518,20 @@
       "integrity": "sha512-/Srv4dswyQNBfohGpz9o6Yb3Gz3SrUDqBH5rTuhGR7ahtlbYKnVxw2bCFMRljaA7EXHaXZ8wsHdodFvbkhKmqg==",
       "dev": true
     },
+    "node_modules/concat-stream": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/concat-stream/-/concat-stream-2.0.0.tgz",
+      "integrity": "sha512-MWufYdFw53ccGjCA+Ol7XJYpAlW6/prSMzuPOTRnJGcGzuhLn4Scrz7qf6o8bROZ514ltazcIFJZevcfbo0x7A==",
+      "engines": [
+        "node >= 6.0"
+      ],
+      "dependencies": {
+        "buffer-from": "^1.0.0",
+        "inherits": "^2.0.3",
+        "readable-stream": "^3.0.2",
+        "typedarray": "^0.0.6"
+      }
+    },
     "node_modules/content-disposition": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/content-disposition/-/content-disposition-1.1.0.tgz",
@@ -3313,6 +3342,63 @@
       "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.3.tgz",
       "integrity": "sha512-6FlzubTLZG3J2a/NVCAleEhjzq5oxgHyaCU9yYXvcLsvoVaHJq/s5xXI6/XXP6tz7R9xAOtHnSO/tXtF3WRTlA=="
     },
+    "node_modules/multer": {
+      "version": "2.1.1",
+      "resolved": "https://registry.npmjs.org/multer/-/multer-2.1.1.tgz",
+      "integrity": "sha512-mo+QTzKlx8R7E5ylSXxWzGoXoZbOsRMpyitcht8By2KHvMbf3tjwosZ/Mu/XYU6UuJ3VZnODIrak5ZrPiPyB6A==",
+      "dependencies": {
+        "append-field": "^1.0.0",
+        "busboy": "^1.6.0",
+        "concat-stream": "^2.0.0",
+        "type-is": "^1.6.18"
+      },
+      "engines": {
+        "node": ">= 10.16.0"
+      },
+      "funding": {
+        "type": "opencollective",
+        "url": "https://opencollective.com/express"
+      }
+    },
+    "node_modules/multer/node_modules/media-typer": {
+      "version": "0.3.0",
+      "resolved": "https://registry.npmjs.org/media-typer/-/media-typer-0.3.0.tgz",
+      "integrity": "sha512-dq+qelQ9akHpcOl/gUVRTxVIOkAJ1wR3QAvb4RsVjS8oVoFjDGTc679wJYmUmknUF5HwMLOgb5O+a3KxfWapPQ==",
+      "engines": {
+        "node": ">= 0.6"
+      }
+    },
+    "node_modules/multer/node_modules/mime-db": {
+      "version": "1.52.0",
+      "resolved": "https://registry.npmjs.org/mime-db/-/mime-db-1.52.0.tgz",
+      "integrity": "sha512-sPU4uV7dYlvtWJxwwxHD0PuihVNiE7TyAbQ5SWxDCB9mUYvOgroQOwYQQOKPJ8CIbE+1ETVlOoK1UC2nU3gYvg==",
+      "engines": {
+        "node": ">= 0.6"
+      }
+    },
+    "node_modules/multer/node_modules/mime-types": {
+      "version": "2.1.35",
+      "resolved": "https://registry.npmjs.org/mime-types/-/mime-types-2.1.35.tgz",
+      "integrity": "sha512-ZDY+bPm5zTTF+YpCrAU9nK0UgICYPT0QtT1NZWFv4s++TNkcgVaT0g6+4R2uI4MjQjzysHB1zxuWL50hzaeXiw==",
+      "dependencies": {
+        "mime-db": "1.52.0"
+      },
+      "engines": {
+        "node": ">= 0.6"
+      }
+    },
+    "node_modules/multer/node_modules/type-is": {
+      "version": "1.6.18",
+      "resolved": "https://registry.npmjs.org/type-is/-/type-is-1.6.18.tgz",
+      "integrity": "sha512-TkRKr9sUTxEH8MdfuCSP7VizJyzRNMjj2J2do2Jr3Kym598JVdEksuzPQCnlFPW4ky9Q+iA+ma9BGm06XQBy8g==",
+      "dependencies": {
+        "media-typer": "0.3.0",
+        "mime-types": "~2.1.24"
+      },
+      "engines": {
+        "node": ">= 0.6"
+      }
+    },
     "node_modules/nat-upnp": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/nat-upnp/-/nat-upnp-1.1.1.tgz",
@@ -3844,6 +3930,19 @@
         "read-binary-file-arch": "cli.js"
       }
     },
+    "node_modules/readable-stream": {
+      "version": "3.6.2",
+      "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-3.6.2.tgz",
+      "integrity": "sha512-9u/sniCrY3D5WdsERHzHE4G2YCXqoG5FTHUiCC4SIbr6XcLZBY05ya9EKjYek9O5xOAwjGq+1JdGBAS7Q9ScoA==",
+      "dependencies": {
+        "inherits": "^2.0.3",
+        "string_decoder": "^1.1.1",
+        "util-deprecate": "^1.0.1"
+      },
+      "engines": {
+        "node": ">= 6"
+      }
+    },
     "node_modules/request": {
       "version": "2.88.2",
       "resolved": "https://registry.npmjs.org/request/-/request-2.88.2.tgz",
@@ -4348,6 +4447,22 @@
         "node": ">= 0.8"
       }
     },
+    "node_modules/streamsearch": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/streamsearch/-/streamsearch-1.1.0.tgz",
+      "integrity": "sha512-Mcc5wHehp9aXz1ax6bZUyY5afg9u2rv5cqQI3mRrYkGC8rW2hM02jWuwjtL++LS5qinSyhj2QfLyNsuc+VsExg==",
+      "engines": {
+        "node": ">=10.0.0"
+      }
+    },
+    "node_modules/string_decoder": {
+      "version": "1.3.0",
+      "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.3.0.tgz",
+      "integrity": "sha512-hkRX8U1WjJFd8LsDJ2yQ/wWWxaopEsABU1XfkM8A+j0+85JAGppt16cr1Whg6KIbb4okU6Mql6BOj+uup/wKeA==",
+      "dependencies": {
+        "safe-buffer": "~5.2.0"
+      }
+    },
     "node_modules/string-width": {
       "version": "4.2.3",
       "resolved": "https://registry.npmjs.org/string-width/-/string-width-4.2.3.tgz",
@@ -4605,6 +4720,11 @@
         "node": ">= 0.6"
       }
     },
+    "node_modules/typedarray": {
+      "version": "0.0.6",
+      "resolved": "https://registry.npmjs.org/typedarray/-/typedarray-0.0.6.tgz",
+      "integrity": "sha512-/aCDEGatGvZ2BIk+HmLf4ifCJFwvKFNb9/JeZPMulfgFracn9QFcAf5GO8B/mweUjSoblS5In0cWhqpfs/5PQA=="
+    },
     "node_modules/typescript": {
       "version": "5.9.3",
       "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.9.3.tgz",
@@ -4641,8 +4761,7 @@
     "node_modules/undici-types": {
       "version": "7.16.0",
       "resolved": "https://registry.npmjs.org/undici-types/-/undici-types-7.16.0.tgz",
-      "integrity": "sha512-Zz+aZWSj8LE6zoxD+xrjh4VfkIG8Ya6LvYkZqtUQGJPZjYl53ypCaUwWqo7eI0x66KBGeRo+mlBEkMSeSZ38Nw==",
-      "dev": true
+      "integrity": "sha512-Zz+aZWSj8LE6zoxD+xrjh4VfkIG8Ya6LvYkZqtUQGJPZjYl53ypCaUwWqo7eI0x66KBGeRo+mlBEkMSeSZ38Nw=="
     },
     "node_modules/universalify": {
       "version": "0.1.2",
@@ -4675,6 +4794,11 @@
       "integrity": "sha512-Xn0w3MtiQ6zoz2vFyUVruaCL53O/DwUvkEeOvj+uulMm0BkUGYWmBYVyElqZaSLhY6ZD0ulfU3aBra2aVT4xfA==",
       "dev": true
     },
+    "node_modules/util-deprecate": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz",
+      "integrity": "sha512-EPD5q1uXyFxJpCrLnCc1nHnq3gOa6DZBocAIiI2TaSCA7VCJ1UJDMagCzIkXNsUYfD1daK//LTEQ8xiIbrHtcw=="
+    },
     "node_modules/uuid": {
       "version": "3.4.0",
       "resolved": "https://registry.npmjs.org/uuid/-/uuid-3.4.0.tgz",
diff --git a/package.json b/package.json
index 0ce1f1b..e19cda4 100644
--- a/package.json
+++ b/package.json
@@ -11,10 +11,12 @@
     "smoke": "npm run build && node -e \"require('./dist/shared/store').ensureProjectFiles(); console.log('smoke ok')\""
   },
   "dependencies": {
+    "@types/multer": "^2.1.0",
     "adm-zip": "^0.5.16",
     "ejs": "^3.1.10",
     "express": "^5.1.0",
     "express-session": "^1.18.2",
+    "multer": "^2.1.1",
     "nat-upnp": "^1.1.1"
   },
   "devDependencies": {
diff --git a/public/styles.css b/public/styles.css
index 2145a14..e80a9ef 100644
--- a/public/styles.css
+++ b/public/styles.css
@@ -281,6 +281,10 @@ button {
   gap: 18px;
 }
 
+.fullSpan {
+  grid-column: 1 / -1;
+}
+
 input,
 textarea,
 select {
@@ -298,6 +302,49 @@ textarea {
   resize: vertical;
 }
 
+.assetSection {
+  display: grid;
+  gap: 18px;
+  margin-top: 24px;
+}
+
+.assetCard {
+  display: grid;
+  gap: 14px;
+  background: rgba(21, 29, 25, 0.72);
+  border: 1px solid var(--line);
+  border-radius: 22px;
+  padding: 22px;
+}
+
+.assetCard h2 {
+  margin: 0;
+  font-size: 24px;
+}
+
+.assetForm {
+  display: flex;
+  gap: 12px;
+  align-items: center;
+  flex-wrap: wrap;
+}
+
+.assetList {
+  display: grid;
+  gap: 10px;
+}
+
+.assetItem {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 12px;
+  padding: 14px 16px;
+  border-radius: 16px;
+  border: 1px solid var(--line);
+  background: var(--panel-strong);
+}
+
 .errorText {
   color: #ffb7ae;
   margin: 0;
diff --git a/src/installer/main.ts b/src/installer/main.ts
index 9057774..0ff131f 100644
--- a/src/installer/main.ts
+++ b/src/installer/main.ts
@@ -44,6 +44,14 @@ function resolveJavaExecutable(jdkPath: string): string {
     : path.join(jdkPath, 'bin', 'java')
 }
 
+function getLauncherRootDir(): string {
+  const appData = process.env.APPDATA
+  if (process.platform === 'win32' && appData != null) {
+    return path.join(appData, '.minecraft')
+  }
+  return path.join(os.homedir(), '.minecraft')
+}
+
 function parseJavaMajorVersion(rawVersion: string): number | null {
   const cleaned = rawVersion.trim().replace(/^"+|"+$/g, '')
   if (cleaned.length === 0) {
@@ -255,13 +263,9 @@ function resolveClientRamMb(pack: PackDefinition): { selected: number; warning:
   throw new Error('플레이 불가: 시스템 램이 최소 램보다 적습니다.')
 }
 
-async function writeLauncherProfile(packName: string, installRoot: string, pack: PackDefinition): Promise<void> {
-  const appData = process.env.APPDATA
-  if (appData == null) {
-    return
-  }
-
-  const launcherProfilesPath = path.join(appData, '.minecraft', 'launcher_profiles.json')
+async function writeLauncherProfile(packName: string, installRoot: string, pack: PackDefinition, lastVersionId: string): Promise<void> {
+  const launcherRoot = getLauncherRootDir()
+  const launcherProfilesPath = path.join(launcherRoot, 'launcher_profiles.json')
   const gameDir = path.join(installRoot, '.mc_custom')
   const selectedRam = resolveClientRamMb(pack).selected
 
@@ -275,15 +279,17 @@ async function writeLauncherProfile(packName: string, installRoot: string, pack:
   }
 
   const profiles = typeof payload.profiles === 'object' && payload.profiles != null
-    ? payload.profiles as Record<string, unknown>
+    ? payload.profiles as Record<string, Record<string, unknown>>
     : {}
 
-  profiles[packName] = {
-    created: new Date().toISOString(),
+  const existingKey = Object.entries(profiles).find(([, profile]) => profile.name === packName)?.[0] ?? packName
+  profiles[existingKey] = {
+    ...(profiles[existingKey] ?? {}),
+    created: String(profiles[existingKey]?.created ?? new Date().toISOString()),
     gameDir,
     icon: 'Grass',
     javaArgs: `-Xms${Math.min(selectedRam, 2048)}M -Xmx${selectedRam}M`,
-    lastVersionId: pack.mcVersion,
+    lastVersionId,
     name: packName,
     type: 'custom'
   }
@@ -343,7 +349,6 @@ async function ensureEditableConfigFiles(root: string, pack: PackDefinition): Pr
 
     await fsp.mkdir(path.dirname(targetPath), { recursive: true })
     const baseName = path.basename(relativeFile)
-
     if (baseName === 'server.properties') {
       await fsp.writeFile(targetPath, [
         'motd=A Minecraft Server',
@@ -365,6 +370,41 @@ async function ensureEditableConfigFiles(root: string, pack: PackDefinition): Pr
   }
 }
 
+async function listFilesRecursively(root: string, predicate: (entryPath: string, entryName: string) => boolean): Promise<string[]> {
+  const results: string[] = []
+  const entries = await fsp.readdir(root, { withFileTypes: true })
+  for (const entry of entries) {
+    const entryPath = path.join(root, entry.name)
+    if (entry.isDirectory()) {
+      results.push(...await listFilesRecursively(entryPath, predicate))
+      continue
+    }
+    if (predicate(entryPath, entry.name)) {
+      results.push(entryPath)
+    }
+  }
+  return results
+}
+
+async function patchRunBatFiles(root: string, pack: PackDefinition): Promise<void> {
+  const runBatFiles = await listFilesRecursively(root, (_entryPath, entryName) => entryName.toLowerCase() === 'run.bat')
+  for (const runBatPath of runBatFiles) {
+    const raw = await fsp.readFile(runBatPath, 'utf8')
+    let next = raw
+      .replace(/-Xms\S+/gi, `-Xms${pack.serverMinRam}M`)
+      .replace(/-Xmx\S+/gi, `-Xmx${pack.serverMaxRam}M`)
+
+    if (next === raw && /java(\.exe)?/i.test(raw)) {
+      next = raw.replace(/java(\.exe)?/i, (match) => `${match} -Xms${pack.serverMinRam}M -Xmx${pack.serverMaxRam}M`)
+    }
+
+    if (next !== raw) {
+      await fsp.writeFile(runBatPath, next, 'utf8')
+      sendLog(`run.bat 램 설정 반영: ${path.relative(root, runBatPath)}`)
+    }
+  }
+}
+
 function stripHtmlToText(html: string): string {
   return html
     .replace(/<script[\s\S]*?<\/script>/gi, ' ')
@@ -391,14 +431,14 @@ async function loadMinecraftEulaText(): Promise<string> {
       return plainText.slice(0, 7000)
     }
   } catch {
-    // Fall back to the bundled summary below.
+    // Fall back below.
   }
 
   return [
     'Minecraft EULA 요약',
     '',
     '이 설치기는 공식 Minecraft EULA 동의를 받아야만 서버팩 설치를 계속할 수 있습니다.',
-    '상업적 이용, 계정 공유, 저작권 침해 등은 허용되지 않으며, 원문은 아래 주소에서 확인할 수 있습니다.',
+    '원문은 아래 주소에서 확인할 수 있습니다.',
     '',
     MINECRAFT_EULA_URL
   ].join('\n')
@@ -441,6 +481,8 @@ async function startInstall(payload: InstallPayload): Promise<{ nextStep: number
 
   const extractedRoot = await downloadAndExtractPack(packMeta.baseUrl, packMeta.packDefinition, payload.installPath)
   await ensureEditableConfigFiles(extractedRoot, packMeta.packDefinition)
+  await patchRunBatFiles(extractedRoot, packMeta.packDefinition)
+
   const eulaPath = path.join(extractedRoot, 'eula.txt')
   if (fs.existsSync(eulaPath)) {
     await fsp.unlink(eulaPath)
@@ -448,6 +490,7 @@ async function startInstall(payload: InstallPayload): Promise<{ nextStep: number
 
   currentInstall = {
     manifestUrl: payload.manifestUrl,
+    baseUrl: packMeta.baseUrl,
     packFile: payload.packFile,
     installPath: payload.installPath,
     jdkPath: payload.jdkPath,
@@ -459,8 +502,6 @@ async function startInstall(payload: InstallPayload): Promise<{ nextStep: number
   await waitForEulaAcceptance()
   await fsp.writeFile(eulaPath, 'eula=true\n', 'utf8')
   sendLog('EULA 동의 반영 완료', 'success')
-  await writeLauncherProfile(packMeta.packName, payload.installPath, packMeta.packDefinition)
-  sendLog('Minecraft 런처 프로필 추가 완료', 'success')
 
   return {
     nextStep: 5,
@@ -608,7 +649,7 @@ function renderConfigEditorPage(): string {
   <meta name="viewport" content="width=device-width, initial-scale=1" />
   <title>서버 설정 편집기</title>
   <style>
-    :root{color-scheme:dark;--bg:#0f1411;--panel:#171e1a;--soft:#202924;--line:#2d3932;--text:#f3f5f4;--muted:#abb5af;--accent:#f0bf57;--ok:#8cd98c;}
+    :root{color-scheme:dark;--panel:#171e1a;--soft:#202924;--line:#2d3932;--text:#f3f5f4;--muted:#abb5af;--ok:#8cd98c;}
     *{box-sizing:border-box;} body{margin:0;font-family:"Segoe UI",sans-serif;background:linear-gradient(180deg,#0b100d 0%,#111813 100%);color:var(--text);}
     .shell{display:grid;grid-template-columns:340px 1fr;min-height:100vh;}
     .sidebar{padding:24px;border-right:1px solid var(--line);background:rgba(12,17,14,0.86);}
@@ -655,12 +696,7 @@ function renderConfigEditorPage(): string {
     </main>
   </div>
   <script>
-    const state = {
-      directory: '',
-      selectedFile: '',
-      saveTimer: null
-    }
-
+    const state = { directory: '', selectedFile: '', saveTimer: null }
     const entryList = document.getElementById('entryList')
     const currentPath = document.getElementById('currentPath')
     const crumbs = document.getElementById('crumbs')
@@ -674,9 +710,7 @@ function renderConfigEditorPage(): string {
 
     async function loadDirectory(relativePath = '') {
       const response = await fetch('/api/list?path=' + encodeURIComponent(relativePath))
-      if (!response.ok) {
-        throw new Error('목록을 불러오지 못했습니다.')
-      }
+      if (!response.ok) throw new Error('목록을 불러오지 못했습니다.')
       const payload = await response.json()
       state.directory = payload.relativePath
       currentPath.textContent = payload.relativePath || '루트'
@@ -703,9 +737,7 @@ function renderConfigEditorPage(): string {
 
     async function loadFile(relativePath) {
       const response = await fetch('/api/file?path=' + encodeURIComponent(relativePath))
-      if (!response.ok) {
-        throw new Error('파일을 열지 못했습니다.')
-      }
+      if (!response.ok) throw new Error('파일을 열지 못했습니다.')
       const payload = await response.json()
       state.selectedFile = payload.relativePath
       currentPath.textContent = payload.relativePath
@@ -722,24 +754,17 @@ function renderConfigEditorPage(): string {
       textarea.value = payload.content
       textarea.addEventListener('input', () => {
         setStatus('변경 감지됨. 자동 저장 중...')
-        if (state.saveTimer != null) {
-          clearTimeout(state.saveTimer)
-        }
+        if (state.saveTimer != null) clearTimeout(state.saveTimer)
         state.saveTimer = setTimeout(async () => {
           const saveResponse = await fetch('/api/file', {
             method: 'PUT',
             headers: { 'Content-Type': 'application/json' },
-            body: JSON.stringify({
-              path: state.selectedFile,
-              content: textarea.value
-            })
+            body: JSON.stringify({ path: state.selectedFile, content: textarea.value })
           })
-
           if (!saveResponse.ok) {
             setStatus('저장 실패', 'error')
             return
           }
-
           setStatus('저장 완료', 'ok')
         }, 300)
       })
@@ -752,11 +777,7 @@ function renderConfigEditorPage(): string {
     })
 
     document.getElementById('upButton').addEventListener('click', () => {
-      if (!state.directory) {
-        loadDirectory('').catch((error) => setStatus(error.message, 'error'))
-        return
-      }
-      const next = state.directory.split('/').slice(0, -1).join('/')
+      const next = state.directory ? state.directory.split('/').slice(0, -1).join('/') : ''
       loadDirectory(next).catch((error) => setStatus(error.message, 'error'))
     })
 
@@ -902,14 +923,177 @@ async function openInstalledFolder(): Promise<void> {
   await shell.openPath(currentInstall.installPath)
 }
 
+async function findServerLaunchScript(root: string): Promise<string | null> {
+  const candidates = await listFilesRecursively(root, (_entryPath, entryName) => entryName.toLowerCase() === 'run.bat')
+  return candidates[0] ?? null
+}
+
 async function findServerJar(root: string): Promise<string | null> {
-  const entries = await fsp.readdir(root, { withFileTypes: true })
-  for (const entry of entries) {
-    if (entry.isFile() && entry.name.endsWith('.jar')) {
-      return path.join(root, entry.name)
+  const candidates = await listFilesRecursively(root, (_entryPath, entryName) => entryName.toLowerCase().endsWith('.jar'))
+  return candidates[0] ?? null
+}
+
+async function downloadSiteFile(baseUrl: string, relativePath: string, targetDir: string): Promise<string> {
+  const normalizedRelativePath = relativePath.replace(/^\/+/, '')
+  const targetUrl = new URL(`/file/${normalizedRelativePath}`, baseUrl).toString()
+  const fileName = path.basename(normalizedRelativePath)
+  const targetPath = path.join(targetDir, fileName)
+  await fsp.mkdir(targetDir, { recursive: true })
+  const response = await fetch(targetUrl)
+  if (!response.ok) {
+    throw new Error(`파일 다운로드 실패: ${normalizedRelativePath}`)
+  }
+  const arrayBuffer = await response.arrayBuffer()
+  await fsp.writeFile(targetPath, Buffer.from(arrayBuffer))
+  return targetPath
+}
+
+async function listVersionDirectories(launcherRoot: string): Promise<string[]> {
+  const versionsDir = path.join(launcherRoot, 'versions')
+  if (!fs.existsSync(versionsDir)) {
+    return []
+  }
+
+  const entries = await fsp.readdir(versionsDir, { withFileTypes: true })
+  return entries.filter((entry) => entry.isDirectory()).map((entry) => entry.name)
+}
+
+async function pickNewestMatchingVersion(launcherRoot: string, matchers: string[]): Promise<string | null> {
+  const versionsDir = path.join(launcherRoot, 'versions')
+  if (!fs.existsSync(versionsDir)) {
+    return null
+  }
+
+  const entries = await fsp.readdir(versionsDir, { withFileTypes: true })
+  const matched = await Promise.all(
+    entries
+      .filter((entry) => entry.isDirectory() && matchers.every((matcher) => entry.name.toLowerCase().includes(matcher.toLowerCase())))
+      .map(async (entry) => ({
+        name: entry.name,
+        mtimeMs: (await fsp.stat(path.join(versionsDir, entry.name))).mtimeMs
+      }))
+  )
+
+  matched.sort((left, right) => right.mtimeMs - left.mtimeMs)
+  return matched[0]?.name ?? null
+}
+
+async function resolveInstalledVersionId(launcherRoot: string, before: string[], pack: PackDefinition): Promise<string> {
+  const after = await listVersionDirectories(launcherRoot)
+  const added = after.filter((entry) => !before.includes(entry))
+  if (added.length === 1) {
+    return added[0]
+  }
+  if (added.length > 1) {
+    return added[added.length - 1]
+  }
+
+  const loaderType = pack.loaderType ?? 'vanilla'
+  if (loaderType === 'vanilla') {
+    return pack.mcVersion
+  }
+
+  if (loaderType === 'fabric' && pack.loaderVersion != null && pack.loaderVersion.length > 0) {
+    const candidate = `fabric-loader-${pack.loaderVersion}-${pack.mcVersion}`
+    if (after.includes(candidate)) {
+      return candidate
     }
   }
-  return null
+
+  const matchers = [loaderType, pack.mcVersion]
+  if (pack.loaderVersion != null && pack.loaderVersion.length > 0) {
+    matchers.push(pack.loaderVersion)
+  }
+  const fallback = await pickNewestMatchingVersion(launcherRoot, matchers)
+  if (fallback != null) {
+    return fallback
+  }
+
+  throw new Error(`${loaderType} 클라이언트 버전 폴더를 찾지 못했습니다.`)
+}
+
+async function installClientLoader(): Promise<string> {
+  if (currentInstall == null) {
+    throw new Error('설치된 서버팩 정보가 없습니다.')
+  }
+
+  const pack = currentInstall.packDefinition
+  const loaderType = pack.loaderType ?? 'vanilla'
+  if (loaderType === 'vanilla') {
+    return pack.mcVersion
+  }
+
+  if (pack.loaderInstallerPath == null || pack.loaderInstallerPath.length === 0) {
+    throw new Error('클라이언트 로더 설치파일 경로가 비어 있습니다.')
+  }
+
+  const launcherRoot = getLauncherRootDir()
+  const cacheDir = path.join(currentInstall.extractedRoot, '.client-cache')
+  const installerPath = await downloadSiteFile(currentInstall.baseUrl, pack.loaderInstallerPath, cacheDir)
+  const beforeVersions = await listVersionDirectories(launcherRoot)
+  const javaExec = resolveJavaExecutable(currentInstall.jdkPath)
+
+  if (loaderType === 'fabric') {
+    if (pack.loaderVersion == null || pack.loaderVersion.length === 0) {
+      throw new Error('Fabric 로더 버전을 입력해야 합니다.')
+    }
+    sendLog(`Fabric 로더 설치 시작: ${pack.loaderVersion}`)
+    await execFileAsync(javaExec, [
+      '-jar',
+      installerPath,
+      'client',
+      '-dir',
+      launcherRoot,
+      '-mcversion',
+      pack.mcVersion,
+      '-loader',
+      pack.loaderVersion
+    ])
+    return resolveInstalledVersionId(launcherRoot, beforeVersions, pack)
+  }
+
+  if (loaderType === 'forge') {
+    sendLog('Forge는 headless client install을 지원하지 않아 GUI 설치기를 실행합니다.', 'warn')
+    await execFileAsync(javaExec, ['-jar', installerPath])
+    return resolveInstalledVersionId(launcherRoot, beforeVersions, pack)
+  }
+
+  if (loaderType === 'neoforge') {
+    sendLog('NeoForge는 GUI 설치기를 실행합니다.', 'warn')
+    await execFileAsync(javaExec, ['-jar', installerPath])
+    return resolveInstalledVersionId(launcherRoot, beforeVersions, pack)
+  }
+
+  return pack.mcVersion
+}
+
+async function applyAssetGroup(relativePaths: string[] | undefined, targetDir: string, label: string): Promise<void> {
+  if (currentInstall == null || relativePaths == null || relativePaths.length === 0) {
+    return
+  }
+
+  await fsp.mkdir(targetDir, { recursive: true })
+  for (const relativePath of relativePaths) {
+    const downloaded = await downloadSiteFile(currentInstall.baseUrl, relativePath, targetDir)
+    sendLog(`${label} 적용: ${path.basename(downloaded)}`)
+  }
+}
+
+async function applyClientConfiguration(): Promise<{ nextStep: number; message: string }> {
+  if (currentInstall == null) {
+    throw new Error('설치된 서버팩 정보가 없습니다.')
+  }
+
+  sendLog('클라이언트 적용 시작')
+  const versionId = await installClientLoader()
+  await applyAssetGroup(currentInstall.packDefinition.resourcePackFiles, path.join(currentInstall.extractedRoot, 'resourcepacks'), '리소스팩')
+  await applyAssetGroup(currentInstall.packDefinition.shaderPackFiles, path.join(currentInstall.extractedRoot, 'shaderpacks'), '쉐이더')
+  await writeLauncherProfile(currentInstall.packName, currentInstall.installPath, currentInstall.packDefinition, versionId)
+  sendLog(`런처 프로필 적용 완료: ${versionId}`, 'success')
+  return {
+    nextStep: 8,
+    message: `클라이언트 적용 완료: ${versionId}`
+  }
 }
 
 async function createDesktopShortcut(enabled: boolean): Promise<void> {
@@ -917,8 +1101,20 @@ async function createDesktopShortcut(enabled: boolean): Promise<void> {
     return
   }
 
-  const desktopDir = path.join(os.homedir(), 'Desktop')
+  const desktopDir = app.getPath('desktop')
+  await fsp.mkdir(desktopDir, { recursive: true })
   const shortcutPath = path.join(desktopDir, `${currentInstall.packName} 서버 실행.cmd`)
+  const launchScript = await findServerLaunchScript(currentInstall.extractedRoot)
+  if (launchScript != null) {
+    const contents = [
+      '@echo off',
+      `cd /d "${path.dirname(launchScript)}"`,
+      `call "${launchScript}"`
+    ].join('\r\n')
+    await fsp.writeFile(shortcutPath, contents, 'utf8')
+    return
+  }
+
   const serverJar = await findServerJar(currentInstall.extractedRoot)
   if (serverJar == null) {
     return
@@ -926,10 +1122,9 @@ async function createDesktopShortcut(enabled: boolean): Promise<void> {
 
   const contents = [
     '@echo off',
-    `cd /d "${currentInstall.extractedRoot}"`,
+    `cd /d "${path.dirname(serverJar)}"`,
     `"${resolveJavaExecutable(currentInstall.jdkPath)}" -Xms${currentInstall.packDefinition.serverMinRam}M -Xmx${currentInstall.packDefinition.serverMaxRam}M -jar "${serverJar}" nogui`
   ].join('\r\n')
-
   await fsp.writeFile(shortcutPath, contents, 'utf8')
 }
 
@@ -938,6 +1133,15 @@ async function runServer(enabled: boolean): Promise<void> {
     return
   }
 
+  const launchScript = await findServerLaunchScript(currentInstall.extractedRoot)
+  if (launchScript != null && process.platform === 'win32') {
+    execFile('cmd.exe', ['/c', launchScript], {
+      cwd: path.dirname(launchScript)
+    })
+    sendLog('run.bat 실행 시작', 'success')
+    return
+  }
+
   const serverJar = await findServerJar(currentInstall.extractedRoot)
   if (serverJar == null) {
     sendLog('서버 JAR을 찾지 못해 자동 실행을 생략합니다.', 'warn')
@@ -952,7 +1156,7 @@ async function runServer(enabled: boolean): Promise<void> {
     serverJar,
     'nogui'
   ], {
-    cwd: currentInstall.extractedRoot
+    cwd: path.dirname(serverJar)
   })
   sendLog('서버 실행 시작', 'success')
 }
@@ -982,6 +1186,7 @@ function bindIpcHandlers() {
   })
   ipcMain.handle('installer:open-config-editor', async () => openConfigEditor())
   ipcMain.handle('installer:configure-port', async () => configurePort())
+  ipcMain.handle('installer:apply-client', async () => applyClientConfiguration())
   ipcMain.handle('installer:open-folder', async () => openInstalledFolder())
   ipcMain.handle('installer:create-shortcut', async (_event, enabled: boolean) => createDesktopShortcut(enabled))
   ipcMain.handle('installer:run-server', async (_event, enabled: boolean) => runServer(enabled))
diff --git a/src/installer/preload.ts b/src/installer/preload.ts
index 6fb6d36..4bc324c 100644
--- a/src/installer/preload.ts
+++ b/src/installer/preload.ts
@@ -11,6 +11,7 @@ contextBridge.exposeInMainWorld('installerApi', {
   acceptEula: () => ipcRenderer.invoke('installer:accept-eula'),
   openConfigEditor: () => ipcRenderer.invoke('installer:open-config-editor'),
   configurePort: () => ipcRenderer.invoke('installer:configure-port'),
+  applyClient: () => ipcRenderer.invoke('installer:apply-client'),
   openFolder: () => ipcRenderer.invoke('installer:open-folder'),
   createShortcut: (enabled: boolean) => ipcRenderer.invoke('installer:create-shortcut', enabled),
   runServer: (enabled: boolean) => ipcRenderer.invoke('installer:run-server', enabled),
diff --git a/src/installer/types.ts b/src/installer/types.ts
index 57844ed..08f697f 100644
--- a/src/installer/types.ts
+++ b/src/installer/types.ts
@@ -35,6 +35,7 @@ export interface InstallPayload {
 
 export interface InstallSessionState {
   manifestUrl: string
+  baseUrl: string
   packFile: string
   installPath: string
   jdkPath: string
diff --git a/src/server/routes/op.ts b/src/server/routes/op.ts
index 928a48f..1212589 100644
--- a/src/server/routes/op.ts
+++ b/src/server/routes/op.ts
@@ -1,5 +1,10 @@
 import { Router } from 'express'
+import multer from 'multer'
+import path from 'node:path'
+import fs from 'node:fs'
+import fsp from 'node:fs/promises'
 import { fetchReleaseVersions } from '../../shared/mojang'
+import { fileDir } from '../../shared/paths'
 import {
   createNewPack,
   deletePacks,
@@ -8,11 +13,14 @@ import {
   loadPackDefinition,
   loadRootManifest,
   normalizePackDefinition,
+  savePackDefinition,
   updatePack
 } from '../../shared/store'
+import { PackDefinition } from '../../shared/types'
 import { requireAuth } from '../middleware/auth'
 
 export const opRouter = Router()
+const upload = multer({ storage: multer.memoryStorage() })
 
 function pickFirstValue(value: unknown): string {
   if (Array.isArray(value)) {
@@ -21,6 +29,41 @@ function pickFirstValue(value: unknown): string {
   return typeof value === 'string' ? value : ''
 }
 
+function sanitizeUploadFileName(name: string): string {
+  return name.replace(/[^a-zA-Z0-9._-]/g, '-').replace(/-+/g, '-')
+}
+
+function normalizeAssetPathForWeb(filePath: string): string {
+  return filePath.replace(/\\/g, '/')
+}
+
+async function saveUploadedPackAsset(packKey: string, bucket: 'loaders' | 'resourcepacks' | 'shaderpacks', file: Express.Multer.File): Promise<string> {
+  const safeName = sanitizeUploadFileName(file.originalname)
+  const relativePath = path.join('uploads', packKey, bucket, `${Date.now()}-${safeName}`)
+  const absolutePath = path.join(fileDir, relativePath)
+  await fsp.mkdir(path.dirname(absolutePath), { recursive: true })
+  await fsp.writeFile(absolutePath, file.buffer)
+  return normalizeAssetPathForWeb(relativePath)
+}
+
+async function mutatePackDefinition(packKey: string, mutate: (pack: PackDefinition) => void): Promise<void> {
+  const current = await loadPackDefinition(packKey)
+  if (current == null) {
+    throw new Error('서버팩 JSON을 찾을 수 없습니다.')
+  }
+
+  const next = normalizePackDefinition(current)
+  mutate(next)
+  await savePackDefinition(packKey, next)
+}
+
+async function removeUploadedAsset(relativePath: string): Promise<void> {
+  const absolutePath = path.join(fileDir, relativePath)
+  if (fs.existsSync(absolutePath)) {
+    await fsp.unlink(absolutePath)
+  }
+}
+
 opRouter.get('/op', (req, res) => {
   if (req.session.userId != null) {
     res.redirect('/op/dashboard')
@@ -125,10 +168,18 @@ opRouter.post('/op/dashboard/:packName', requireAuth, async (req, res, next) =>
     const packKey = pickFirstValue(req.params.packName)
     const nextPackName = pickFirstValue(req.body.displayName).trim() || packKey
     const nextJsonKey = pickFirstValue(req.body.fileName).trim() || packKey
+    const currentDefinition = await loadPackDefinition(packKey)
+    if (currentDefinition == null) {
+      throw new Error('서버팩 JSON을 찾을 수 없습니다.')
+    }
 
     const normalized = normalizePackDefinition({
+      ...currentDefinition,
       mcVersion: pickFirstValue(req.body.mcVersion),
       recommendedJdkVersion: Number(pickFirstValue(req.body.recommendedJdkVersion)),
+      loaderType: pickFirstValue(req.body.loaderType) as PackDefinition['loaderType'],
+      loaderVersion: pickFirstValue(req.body.loaderVersion),
+      loaderInstallerPath: pickFirstValue(req.body.loaderInstallerPath),
       serverMinRam: Number(pickFirstValue(req.body.serverMinRam)),
       serverMaxRam: Number(pickFirstValue(req.body.serverMaxRam)),
       clientMinRam: Number(pickFirstValue(req.body.clientMinRam)),
@@ -143,3 +194,101 @@ opRouter.post('/op/dashboard/:packName', requireAuth, async (req, res, next) =>
     next(error)
   }
 })
+
+opRouter.post('/op/dashboard/:packName/assets/loader', requireAuth, upload.single('asset'), async (req, res, next) => {
+  try {
+    const packKey = pickFirstValue(req.params.packName)
+    if (req.file == null) {
+      throw new Error('업로드된 로더 파일이 없습니다.')
+    }
+
+    const relativePath = await saveUploadedPackAsset(packKey, 'loaders', req.file)
+    await mutatePackDefinition(packKey, (pack) => {
+      pack.loaderInstallerPath = relativePath
+    })
+
+    res.redirect(`/op/dashboard/${packKey}`)
+  } catch (error) {
+    next(error)
+  }
+})
+
+opRouter.post('/op/dashboard/:packName/assets/resource-pack', requireAuth, upload.single('asset'), async (req, res, next) => {
+  try {
+    const packKey = pickFirstValue(req.params.packName)
+    if (req.file == null) {
+      throw new Error('업로드된 리소스팩 파일이 없습니다.')
+    }
+
+    const relativePath = await saveUploadedPackAsset(packKey, 'resourcepacks', req.file)
+    await mutatePackDefinition(packKey, (pack) => {
+      pack.resourcePackFiles = [...(pack.resourcePackFiles ?? []), relativePath]
+    })
+
+    res.redirect(`/op/dashboard/${packKey}`)
+  } catch (error) {
+    next(error)
+  }
+})
+
+opRouter.post('/op/dashboard/:packName/assets/shader-pack', requireAuth, upload.single('asset'), async (req, res, next) => {
+  try {
+    const packKey = pickFirstValue(req.params.packName)
+    if (req.file == null) {
+      throw new Error('업로드된 쉐이더 파일이 없습니다.')
+    }
+
+    const relativePath = await saveUploadedPackAsset(packKey, 'shaderpacks', req.file)
+    await mutatePackDefinition(packKey, (pack) => {
+      pack.shaderPackFiles = [...(pack.shaderPackFiles ?? []), relativePath]
+    })
+
+    res.redirect(`/op/dashboard/${packKey}`)
+  } catch (error) {
+    next(error)
+  }
+})
+
+opRouter.post('/op/dashboard/:packName/assets/loader/remove', requireAuth, async (req, res, next) => {
+  try {
+    const packKey = pickFirstValue(req.params.packName)
+    const targetPath = pickFirstValue(req.body.assetPath)
+    await removeUploadedAsset(targetPath)
+    await mutatePackDefinition(packKey, (pack) => {
+      if (pack.loaderInstallerPath === targetPath) {
+        pack.loaderInstallerPath = ''
+      }
+    })
+    res.redirect(`/op/dashboard/${packKey}`)
+  } catch (error) {
+    next(error)
+  }
+})
+
+opRouter.post('/op/dashboard/:packName/assets/resource-pack/remove', requireAuth, async (req, res, next) => {
+  try {
+    const packKey = pickFirstValue(req.params.packName)
+    const targetPath = pickFirstValue(req.body.assetPath)
+    await removeUploadedAsset(targetPath)
+    await mutatePackDefinition(packKey, (pack) => {
+      pack.resourcePackFiles = (pack.resourcePackFiles ?? []).filter((entry) => entry !== targetPath)
+    })
+    res.redirect(`/op/dashboard/${packKey}`)
+  } catch (error) {
+    next(error)
+  }
+})
+
+opRouter.post('/op/dashboard/:packName/assets/shader-pack/remove', requireAuth, async (req, res, next) => {
+  try {
+    const packKey = pickFirstValue(req.params.packName)
+    const targetPath = pickFirstValue(req.body.assetPath)
+    await removeUploadedAsset(targetPath)
+    await mutatePackDefinition(packKey, (pack) => {
+      pack.shaderPackFiles = (pack.shaderPackFiles ?? []).filter((entry) => entry !== targetPath)
+    })
+    res.redirect(`/op/dashboard/${packKey}`)
+  } catch (error) {
+    next(error)
+  }
+})
diff --git a/src/shared/store.ts b/src/shared/store.ts
index 487d6af..9d01d9f 100644
--- a/src/shared/store.ts
+++ b/src/shared/store.ts
@@ -23,13 +23,18 @@ const defaultAccount: AccountEntry[] = [
 const defaultPackDefinition: PackDefinition = {
   mcVersion: '1.20.1',
   recommendedJdkVersion: 17,
+  loaderType: 'vanilla',
+  loaderVersion: '',
+  loaderInstallerPath: '',
   serverMinRam: 2048,
   serverMaxRam: 4096,
   clientMinRam: 4096,
   clientRecommendedRam: 8192,
   packPath: 'sample-pack.zip',
   description: '새 서버팩',
-  configEditableFiles: ['server.properties', 'bukkit.yml']
+  configEditableFiles: ['server.properties', 'bukkit.yml'],
+  resourcePackFiles: [],
+  shaderPackFiles: []
 }
 
 async function ensureDir(targetPath: string): Promise<void> {
@@ -215,6 +220,11 @@ export function normalizePackDefinition(input: Partial<PackDefinition>): PackDef
     recommendedJdkVersion: Number.isFinite(Number(input.recommendedJdkVersion))
       ? Number(input.recommendedJdkVersion)
       : 17,
+    loaderType: ['vanilla', 'forge', 'fabric', 'neoforge'].includes(String(input.loaderType ?? 'vanilla'))
+      ? String(input.loaderType ?? 'vanilla') as PackDefinition['loaderType']
+      : 'vanilla',
+    loaderVersion: String(input.loaderVersion ?? '').trim(),
+    loaderInstallerPath: String(input.loaderInstallerPath ?? '').trim(),
     serverMinRam: Number(input.serverMinRam ?? 2048),
     serverMaxRam: Number(input.serverMaxRam ?? 4096),
     clientMinRam: Number(input.clientMinRam ?? 4096),
@@ -226,6 +236,12 @@ export function normalizePackDefinition(input: Partial<PackDefinition>): PackDef
       : undefined,
     configEditableFiles: Array.isArray(input.configEditableFiles)
       ? input.configEditableFiles.map((entry) => String(entry).trim()).filter((entry) => entry.length > 0)
-      : ['server.properties', 'bukkit.yml']
+      : ['server.properties', 'bukkit.yml'],
+    resourcePackFiles: Array.isArray(input.resourcePackFiles)
+      ? input.resourcePackFiles.map((entry) => String(entry).trim()).filter((entry) => entry.length > 0)
+      : [],
+    shaderPackFiles: Array.isArray(input.shaderPackFiles)
+      ? input.shaderPackFiles.map((entry) => String(entry).trim()).filter((entry) => entry.length > 0)
+      : []
   }
 }
diff --git a/src/shared/types.ts b/src/shared/types.ts
index 1c7b4de..3ed6624 100644
--- a/src/shared/types.ts
+++ b/src/shared/types.ts
@@ -14,6 +14,9 @@ export interface RootManifest {
 export interface PackDefinition {
   mcVersion: string
   recommendedJdkVersion?: number
+  loaderType?: 'vanilla' | 'forge' | 'fabric' | 'neoforge'
+  loaderVersion?: string
+  loaderInstallerPath?: string
   serverMinRam: number
   serverMaxRam: number
   clientMinRam: number
@@ -22,6 +25,8 @@ export interface PackDefinition {
   description?: string
   files?: string[]
   configEditableFiles?: string[]
+  resourcePackFiles?: string[]
+  shaderPackFiles?: string[]
 }
 
 export interface AccountEntry {
diff --git a/views/op/editor.ejs b/views/op/editor.ejs
index 8b0c502..8e9bf60 100644
--- a/views/op/editor.ejs
+++ b/views/op/editor.ejs
@@ -49,6 +49,23 @@
             <span>권장 JDK 버전</span>
             <input type="number" name="recommendedJdkVersion" value="<%= pack.recommendedJdkVersion ?? 17 %>" min="8" required />
           </label>
+          <label>
+            <span>클라이언트 로더 종류</span>
+            <select name="loaderType">
+              <option value="vanilla" <%= (pack.loaderType ?? 'vanilla') === 'vanilla' ? 'selected' : '' %>>vanilla</option>
+              <option value="forge" <%= pack.loaderType === 'forge' ? 'selected' : '' %>>forge</option>
+              <option value="fabric" <%= pack.loaderType === 'fabric' ? 'selected' : '' %>>fabric</option>
+              <option value="neoforge" <%= pack.loaderType === 'neoforge' ? 'selected' : '' %>>neoforge</option>
+            </select>
+          </label>
+          <label>
+            <span>로더 버전</span>
+            <input name="loaderVersion" value="<%= pack.loaderVersion ?? '' %>" placeholder="예: 0.16.14 / 47.3.0 / 21.4.111-beta" />
+          </label>
+          <label class="fullSpan">
+            <span>로더 설치파일 경로</span>
+            <input name="loaderInstallerPath" value="<%= pack.loaderInstallerPath ?? '' %>" placeholder="예: uploads/sample-pack/loaders/..." />
+          </label>
           <label>
             <span>packPath</span>
             <input name="packPath" value="<%= pack.packPath %>" required />
@@ -73,6 +90,63 @@
 
         <button class="primaryButton" type="submit">적용</button>
       </form>
+
+      <section class="assetSection">
+        <div class="assetCard">
+          <h2>로더 설치파일 업로드</h2>
+          <form method="post" action="/op/dashboard/<%= packKey %>/assets/loader" enctype="multipart/form-data" class="assetForm">
+            <input type="file" name="asset" required />
+            <button class="primaryButton" type="submit">로더 업로드</button>
+          </form>
+          <% if (pack.loaderInstallerPath) { %>
+            <div class="assetItem">
+              <code><%= pack.loaderInstallerPath %></code>
+              <form method="post" action="/op/dashboard/<%= packKey %>/assets/loader/remove">
+                <input type="hidden" name="assetPath" value="<%= pack.loaderInstallerPath %>" />
+                <button class="dangerButton" type="submit">삭제</button>
+              </form>
+            </div>
+          <% } %>
+        </div>
+
+        <div class="assetCard">
+          <h2>리소스팩 업로드</h2>
+          <form method="post" action="/op/dashboard/<%= packKey %>/assets/resource-pack" enctype="multipart/form-data" class="assetForm">
+            <input type="file" name="asset" required />
+            <button class="primaryButton" type="submit">리소스팩 추가</button>
+          </form>
+          <div class="assetList">
+            <% (pack.resourcePackFiles ?? []).forEach((resourcePack) => { %>
+              <div class="assetItem">
+                <code><%= resourcePack %></code>
+                <form method="post" action="/op/dashboard/<%= packKey %>/assets/resource-pack/remove">
+                  <input type="hidden" name="assetPath" value="<%= resourcePack %>" />
+                  <button class="dangerButton" type="submit">삭제</button>
+                </form>
+              </div>
+            <% }) %>
+          </div>
+        </div>
+
+        <div class="assetCard">
+          <h2>쉐이더 업로드</h2>
+          <form method="post" action="/op/dashboard/<%= packKey %>/assets/shader-pack" enctype="multipart/form-data" class="assetForm">
+            <input type="file" name="asset" required />
+            <button class="primaryButton" type="submit">쉐이더 추가</button>
+          </form>
+          <div class="assetList">
+            <% (pack.shaderPackFiles ?? []).forEach((shaderPack) => { %>
+              <div class="assetItem">
+                <code><%= shaderPack %></code>
+                <form method="post" action="/op/dashboard/<%= packKey %>/assets/shader-pack/remove">
+                  <input type="hidden" name="assetPath" value="<%= shaderPack %>" />
+                  <button class="dangerButton" type="submit">삭제</button>
+                </form>
+              </div>
+            <% }) %>
+          </div>
+        </div>
+      </section>
     </section>
   </main>
 </body>