diff --git a/docker-compose.yml b/docker-compose.yml
index e5b2474..d9fc5e2 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -21,8 +21,9 @@ services:
       - '3000:3000'
     volumes:
       - /var/run/docker.sock:/var/run/docker.sock
-      - ./server/src:/app/src
-      - ./server/swagger.yaml:/app/swagger.yaml
+      - ./server/src:/app/server/src
+      - ./server/swagger.yaml:/app/server/swagger.yaml
+      - ./packages:/app/packages
       - ./quests:/app/quests
     environment:
       - MONGO_URL=mongodb://db:27017/odyssey-test
diff --git a/packages/file-graph/fileGraph.js b/packages/file-graph/fileGraph.js
index 611fc4c..7bfda7d 100644
--- a/packages/file-graph/fileGraph.js
+++ b/packages/file-graph/fileGraph.js
@@ -54,4 +54,8 @@ export default class FileGraph {
       // Implement other cases if needed
     }
   }
+
+  toJSON() {
+    return this.root.toJSON()
+  }
 }
diff --git a/packages/file-graph/index.js b/packages/file-graph/index.js
new file mode 100644
index 0000000..4b1fcda
--- /dev/null
+++ b/packages/file-graph/index.js
@@ -0,0 +1,3 @@
+export { default as File } from './file.js'
+export { default as FileNode } from './fileNode.js'
+export { default as FileGraph } from './fileGraph.js'
diff --git a/packages/file-graph/package.json b/packages/file-graph/package.json
index 69b2535..59d0b82 100644
--- a/packages/file-graph/package.json
+++ b/packages/file-graph/package.json
@@ -1,7 +1,8 @@
 {
-  "name": "file-graph",
+  "name": "@linux-odyssey/file-graph",
   "version": "1.0.0",
   "main": "index.js",
+  "exports": "./index.js",
   "license": "MIT",
   "type": "module",
   "scripts": {
diff --git a/server/Dockerfile b/server/Dockerfile
index 6ee9ddd..078876b 100644
--- a/server/Dockerfile
+++ b/server/Dockerfile
@@ -1,13 +1,17 @@
 FROM node
 
 WORKDIR /app
-COPY server/package.json yarn.lock ./
+COPY ./package.json yarn.lock ./
+COPY server/package.json ./server/package.json
+COPY packages/file-graph/package.json ./packages/file-graph/package.json
 RUN yarn install --frozen-lockfile --production
 
-COPY server/src ./src
-COPY server/swagger.yaml .
+COPY ./server ./server
+COPY packages/file-graph ./packages/file-graph
 COPY quests ./quests
 
+WORKDIR /app/server
+
 ENV NODE_ENV=production
 ENV HOST=0.0.0.0
 ENV PORT=3000
diff --git a/server/Dockerfile.dev b/server/Dockerfile.dev
index 86186c2..738d4ea 100644
--- a/server/Dockerfile.dev
+++ b/server/Dockerfile.dev
@@ -1,7 +1,9 @@
 FROM node
 
 WORKDIR /app
-COPY server/package.json yarn.lock ./
+COPY package.json yarn.lock ./
+COPY server/package.json ./server/package.json
+COPY packages/file-graph/package.json ./packages/file-graph/package.json
 RUN yarn install --frozen-lockfile
 
 ENV NODE_ENV=development
@@ -9,4 +11,4 @@ ENV HOST=0.0.0.0
 ENV PORT=3000
 EXPOSE 3000
 
-CMD [ "yarn", "dev" ]
\ No newline at end of file
+CMD [ "yarn", "server" ]
\ No newline at end of file
diff --git a/server/package.json b/server/package.json
index 0fe6b1f..d30d738 100644
--- a/server/package.json
+++ b/server/package.json
@@ -10,6 +10,7 @@
     "clean": "node src/cli/clean.js"
   },
   "dependencies": {
+    "@linux-odyssey/file-graph": "1.0.0",
     "commander": "^11.0.0",
     "dockerode": "^3.3.5",
     "express": "^4.18.2",
diff --git a/server/src/game/commandHandler.js b/server/src/game/commandHandler.js
index 35335f3..caa7487 100644
--- a/server/src/game/commandHandler.js
+++ b/server/src/game/commandHandler.js
@@ -1,7 +1,10 @@
 import minimist from 'minimist'
+import { FileGraph } from '@linux-odyssey/file-graph'
 import Quest from '../models/quest.js'
 import { pushToSession } from '../api/socket.js'
 
+console.log(typeof FileGraph)
+
 // 檢查 pattern 是否符合 input
 const checkMatch = (pattern, input) => {
   if (pattern.length === 0) return true
@@ -11,6 +14,40 @@ const checkMatch = (pattern, input) => {
   })
 }
 
+async function discoverHandler(session, commandInput, additionalData) {
+  const graph = new FileGraph(session.graph)
+  graph.discover(additionalData.discover)
+  console.log('graph:', graph.toString())
+  session.graph = graph.toJSON()
+  await session.save()
+}
+
+const pushGraph = (session, commandInput, additionalData) => {
+  pushToSession(session.id, 'graph', {
+    pwd: commandInput.pwd,
+    discover: additionalData.discover,
+  })
+}
+
+const eventListenr = {
+  add: [],
+  remove: [],
+  discover: [discoverHandler, pushGraph],
+  pwd: [],
+}
+
+function handleEvent(session, commandInput, additionalData) {
+  const events = Object.keys(additionalData)
+  events.forEach((event) => {
+    const handlers = eventListenr[event]
+    if (handlers) {
+      handlers.forEach((handler) =>
+        handler(session, commandInput, additionalData)
+      )
+    }
+  })
+}
+
 async function commandHandler(session, commandInput, additionalData) {
   const quest = await Quest.findById(session.quest)
   const stage = quest.stages.find((s) => s.id === session.progress)
@@ -21,12 +58,8 @@ async function commandHandler(session, commandInput, additionalData) {
 
   const argv = minimist(commandInput.command.split(' '))
 
-  if ('discover' in additionalData) {
-    pushToSession(session.id, 'graph', {
-      pwd: commandInput.pwd,
-      discover: additionalData.discover,
-    })
-  } else if (argv._[0] === 'cd') {
+  handleEvent(session, commandInput, additionalData)
+  if (argv._[0] === 'cd') {
     pushToSession(session.id, 'graph', { pwd: commandInput.pwd })
   }
 
diff --git a/server/src/utils/quest.js b/server/src/utils/quest.js
index e8a2276..315528f 100644
--- a/server/src/utils/quest.js
+++ b/server/src/utils/quest.js
@@ -4,7 +4,7 @@ import yaml from 'yaml'
 
 import Quest from '../models/quest.js'
 
-const questDirectory = path.join(process.cwd(), 'quests')
+const questDirectory = path.join(process.cwd(), '..', 'quests')
 
 export default async function loadAndUpdateQuests() {
   const questNames = await fs.readdir(questDirectory)