diff --git a/.eslintrc.js b/.eslintrc.js
index ebfa30a..7d9e2c6 100644
--- a/.eslintrc.js
+++ b/.eslintrc.js
@@ -20,5 +20,6 @@ module.exports = {
     'no-debugger': process.env.NODE_ENV === 'production' ? 'warn' : 'off',
     'import/extensions': 'off',
     camelcase: ['error', { properties: 'never', ignoreDestructuring: true }],
+    'no-param-reassign': ['error', { props: false }],
   },
 }
diff --git a/README.md b/README.md
index 2b70dd9..122d011 100644
--- a/README.md
+++ b/README.md
@@ -17,7 +17,8 @@ yarn install
 ## Create database
 
 ```
-docker compose up -d
+docker compose pull
+docker compose up -d db
 ```
 
 ## Server
@@ -25,10 +26,23 @@ docker compose up -d
 Source: `server/`
 
 ```
-yarn server
+docker compose -f docker-compose.build.yml pull
+docker compose up -d
 # Open http://localhost:3000
 ```
 
+### Build images
+
+    docker compose build
+    docker compose push
+
+Game images:
+
+```
+docker compose -f docker-compose.build.yml build
+docker compose -f docker-compose.build.yml push
+```
+
 ## App
 
 Source: `app/`
@@ -38,24 +52,46 @@ yarn app
 # Open http://localhost:5173/
 ```
 
+## Swagger
+
+```
+docker compose up -d swagger
+```
+
+Open http://localhost:8080 to open Swagger
+
 ## CLI terminal client
 
-Open server first, then create a session by `POST /api/v1/sessions`
+```
+yarn cli
+Usage: client [options] [command]
 
-```bash
-curl -X 'POST' \
-  'http://localhost:3000/api/v1/sessions' \
-  -H 'accept: application/json' \
-  -H 'Content-Type: application/json' \
-  -d '{
-  "quest_id": "helloworld"
-}'
+Options:
+  -s, --session <string>  Session ID
+  -c, --create            Create a new session
+  -h, --host <string>     Server host (default: "http://localhost:3000")
+  --help                  display help for command
+
+Commands:
+  list                    List all sessions
 ```
 
-Then use the `_id` field in response
+connet to recent session:
 
-```
-yarn cli [_id]
-# example
-yarn cli 64be226a39c0043cd1cdf7c2
-```
+    yarn cli
+
+connect to new session:
+
+    yarn cli -c
+
+connect to specific session:
+
+    yarn cli -s 64d0de0367459c13004bc83f
+
+connect to other host:
+
+    yarn cli -h https://example.com
+
+list sessions:
+
+    yarn cli list
diff --git a/docker-compose.build.yml b/docker-compose.build.yml
new file mode 100644
index 0000000..c3bcd77
--- /dev/null
+++ b/docker-compose.build.yml
@@ -0,0 +1,7 @@
+version: '3'
+services:
+  helloworld:
+    image: lancatlin/linux-odyssey:helloworld
+    build:
+      context: .
+      dockerfile: server/quests/helloworld/Dockerfile
diff --git a/docker-compose.yml b/docker-compose.yml
index 8a03ed9..40925c6 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -26,6 +26,15 @@ services:
     volumes:
       - ./data:/data/db
 
+  swagger:
+    image: swaggerapi/swagger-editor:latest
+    ports:
+      - 8080:8080
+    volumes:
+      - ./server/swagger.yaml:/tmp/swagger.yaml
+    environment:
+      - SWAGGER_FILE=/tmp/swagger.yaml
+
 networks:
   internal:
   players:
diff --git a/packages/cli/cli.js b/packages/cli/cli.js
new file mode 100644
index 0000000..39d5ecd
--- /dev/null
+++ b/packages/cli/cli.js
@@ -0,0 +1,136 @@
+/* eslint-disable no-await-in-loop */
+/* eslint-disable no-restricted-syntax */
+const fs = require('fs').promises
+const { exit } = require('process')
+const readline = require('readline')
+
+const RETURN_SYMBOL = '\u21B5'
+
+// ANSI color map
+const ANSI_COLORS = {
+  black: 30,
+  red: 31,
+  green: 32,
+  yellow: 33,
+  blue: 34,
+  magenta: 35,
+  cyan: 36,
+  white: 37,
+}
+
+function colorize(content, color) {
+  const colorCode = ANSI_COLORS[color]
+  if (!colorCode) return content
+  return `\x1b[${colorCode}m${content}\x1b[0m`
+}
+
+process.stdin.setRawMode(true)
+
+const rl = readline.createInterface({
+  input: process.stdin,
+  output: process.stdout,
+  terminal: false,
+})
+
+function waitForEnter() {
+  return new Promise((resolve) => {
+    rl.once('line', resolve)
+  })
+}
+
+function printLine(content, delay, color) {
+  const printContent = `${colorize(content, color)}${RETURN_SYMBOL}`
+  return new Promise((resolve) => {
+    let i = 0
+    const timer = setInterval(() => {
+      process.stdout.write(printContent[i])
+      i += 1
+      if (i >= printContent.length) {
+        clearInterval(timer)
+        waitForEnter().then(resolve)
+      }
+    }, delay)
+
+    waitForEnter().then(() => {
+      clearInterval(timer)
+      process.stdout.write(printContent.slice(i))
+      process.stdout.write('\n')
+      resolve()
+    })
+  })
+}
+
+async function printResponses(responses, delay = 100) {
+  for (const response of responses) {
+    const { type, content, speaker, color } = response
+    if (type === 'narrative') {
+      for (const line of content) {
+        await printLine(line, delay, color || 'white')
+      }
+    }
+    if (type === 'dialogue') {
+      console.log(`${speaker}:`)
+      for (const line of content) {
+        await printLine(`\t${line}`, delay, color || 'green')
+      }
+    }
+  }
+  rl.close()
+}
+
+async function readOrNone(file) {
+  try {
+    return await fs.readFile(file, 'utf8')
+  } catch (err) {
+    return ''
+  }
+}
+
+async function main() {
+  const {
+    API_ENDPOINT,
+    TOKEN,
+    PWD,
+    CMD_NAME,
+    CMD_OUTPUT_FILE,
+    CMD_ERROR_FILE,
+    CMD_EXIT_CODE,
+  } = process.env
+  if (!CMD_NAME) exit(0)
+
+  const output = await readOrNone(CMD_OUTPUT_FILE)
+  const error = await readOrNone(CMD_ERROR_FILE)
+  const payload = {
+    command: CMD_NAME,
+    output,
+    error,
+    exit_code: CMD_EXIT_CODE,
+    token: TOKEN,
+    pwd: PWD,
+  }
+  try {
+    const res = await fetch(`${API_ENDPOINT}/api/v1/commands`, {
+      method: 'POST',
+      headers: {
+        'Content-Type': 'application/json',
+      },
+      body: JSON.stringify(payload),
+    })
+    const data = await res.json()
+    if (data.responses) {
+      await printResponses(data.responses, 60)
+    }
+    if (data.hints) {
+      for (const hint of data.hints) {
+        console.log(colorize(hint, 'yellow'))
+      }
+    }
+    if (data.end) {
+      console.log(colorize('Quest completed!', 'blue'))
+    }
+  } catch (err) {
+    console.error(err)
+  }
+}
+
+main().then(exit).catch(console.error)
diff --git a/packages/cli/package.json b/packages/cli/package.json
new file mode 100644
index 0000000..d8c4598
--- /dev/null
+++ b/packages/cli/package.json
@@ -0,0 +1,7 @@
+{
+  "name": "cli",
+  "version": "1.0.0",
+  "main": "index.js",
+  "license": "MIT",
+  "dependencies": {}
+}
diff --git a/server/quests/characters.yml b/server/quests/characters.yml
new file mode 100644
index 0000000..28c0b3a
--- /dev/null
+++ b/server/quests/characters.yml
@@ -0,0 +1,4 @@
+characters:
+  savantia:
+    en: Savantia
+    zh: 薩凡媞雅
diff --git a/server/quests/helloworld/Dockerfile b/server/quests/helloworld/Dockerfile
index 01f3814..8a8942d 100644
--- a/server/quests/helloworld/Dockerfile
+++ b/server/quests/helloworld/Dockerfile
@@ -1,16 +1,19 @@
-FROM ubuntu:latest
+FROM node:latest
 
 RUN apt-get update && apt-get install -y \
   curl \
   vim \
+  zsh \
   jq
 
-RUN adduser --disabled-password --gecos '' rudeus
+RUN adduser --disabled-password --gecos '' --shell /bin/zsh rudeus
 
 USER rudeus
 
 WORKDIR /home/rudeus
 
-COPY ./home /home/rudeus/
+COPY ./server/quests/helloworld/home /home/rudeus/
 
-CMD [ "/bin/bash" ]
+COPY ./packages/cli/cli.js /usr/local/bin/cli.js
+
+CMD [ "/bin/zsh" ]
diff --git a/server/quests/helloworld/game.yml b/server/quests/helloworld/game.yml
new file mode 100644
index 0000000..2dca81c
--- /dev/null
+++ b/server/quests/helloworld/game.yml
@@ -0,0 +1,75 @@
+title: Hello, Linux World!
+order: 1
+instruction: |
+  你身在一個漆黑的房間裡，沒有任何的光線或聲音。你想不起來為什麼自己會來到這裡。但你的腦中隱約感到某個聲音跟你說：
+
+  「輸入 echo Hello World!」
+stages:
+  - id: helloworld
+    condition:
+      command:
+        - echo Hello World!
+    responses:
+      - type: narrative
+        content:
+          - 你聽到了一個聲音：
+      - type: dialogue
+        speaker: Unix Spirit
+        content:
+          - 你好，指令官，我是你的 Unix 精靈。我已在此恭候多時。
+          - 這個世界是在 3560000 時脈以前，由初代王建立了 Unix 律法，所形成的世界。然而在經過了好幾世代的王後，終於誕生了永恆之王——薩加（Saga），她比歷代的君王都更為強大，且從來不會衰老，使得這個世界變得前所未有的強大。
+          - 然而，外在世界一直不斷在改變，同時在面臨外敵的不斷攻擊，而薩加卻始終用同一套治理的手段。最終，在 160000 時脈前的一次入侵中，根部遭到攻陷，薩加遭到封印，而這個國家也陷入了黑暗。
+          - 由於長久以來依賴於薩加，世人已失去了「指令」的力量，即將走向衰敗和滅亡的命運。
+          - 你的任務，就是找回被世人遺忘的指令，奪回 Linux 之根，成為 Linux 之王。
+          - 首先，你必須要學會如何使用指令。
+          - 一個指令是由一個指令名稱和一些參數所組成的，而指令名稱和參數之間是以空白字元分隔。
+          - 例如，你可以輸入 `ls` 來查看目前的目錄下有哪些檔案。
+    hints:
+      - 使用 `ls` 指令來查看目前的目錄下有哪些檔案。
+    next: ls
+  - id: ls
+    condition:
+      command:
+        - ls
+    responses:
+      - types: narrative
+        content:
+          - 一瞬間，視野變得清晰起來，你發現自己身處在一個石頭建築的房間裡，房間裡有一個門，門上有一個鎖。
+          - 你發現了一個檔案，檔名是 `forgotten_scroll.txt`。
+      - type: dialogue
+        speaker: Unix Spirit
+        content:
+          - 你找到了一個被遺忘的卷軸，上面寫著解除封印的咒語。
+          - 使用指令 `cat [檔案名稱]` 來查看檔案內容。
+          - 我可以為你提供一些指令的提示，只要輸入指令的前幾個字元，然後按下 `Tab` 鍵，就可以看到提示了。
+          - 例如，你可以輸入 `ca` 然後按下 `Tab` 鍵，就可以看到 `cat` 這個指令的提示了。
+          - 檔案名稱也一樣，只要輸入檔案名稱的前幾個字元，然後按下 `Tab` 鍵，就可以看到提示了。
+    hints:
+      - 使用 `cat [檔案名稱]` 指令來查看檔案內容。
+      - 使用 `Tab` 鍵來取得指令提示。
+    next: cat
+  - id: cat
+    condition:
+      command:
+        - cat forgotten_scroll.txt
+    responses:
+      - type: dialogue
+        speaker: Unix Spirit
+        content:
+          - 你找到的是一個被遺忘的卷軸，上面寫著解除封印的咒語。
+          - 使用你已經知道的 `echo` 指令來詠唱咒語。
+    next: echo
+  - id: echo
+    condition:
+      command:
+        - echo Unix, rise and guide me!
+    responses:
+      - type: narrative
+        content:
+          - 突然之間，你感覺到一股強大的力量從你的身體中湧出，你的身體開始發光，你的手中出現了一把魔法之劍。
+      - type: dialogue
+        speaker: Unix Spirit
+        content:
+          - 恭喜您，我的指令官，您已成功解除了封印。
+          - 請跟著在接下了關卡，一步步取回 Linux 之根吧！
+    next: END
diff --git a/server/quests/helloworld/home/.bashrc b/server/quests/helloworld/home/.bashrc
deleted file mode 100644
index 3a0355f..0000000
--- a/server/quests/helloworld/home/.bashrc
+++ /dev/null
@@ -1,30 +0,0 @@
-# This function will be called before each command is executed
-preexec() {
-    [ -n "$COMP_LINE" ] && return  # do nothing if completing
-    [ "$BASH_COMMAND" = "$PROMPT_COMMAND" ] && return # do nothing if completing
-    local command="$BASH_COMMAND"
-    local pwd="$PWD"
-
-    if [[ $command =~ ^(vim|top|less|more|nano) ]]; then
-        local payload=$(printf '{"token": "%s", "pwd": "%s", "command": "%s"}' "$TOKEN" "$pwd" "$command")
-        curl -X POST $API_ENDPOINT/api/v1/commands -H 'accept: */*' -H 'Content-Type: application/json' -d "$payload"
-        return
-    fi
-
-    # Execute the command, capture output and exit code
-    local output=$( { eval $command 2>&1; echo $? > /tmp/exit_code; }) 
-    local exit_code=$(cat /tmp/exit_code)
-
-    local output_esc=$(echo $output | jq -Rs .)
-
-    # Store command in variable
-    local payload=$(printf '{"token": "%s", "pwd": "%s", "command": "%s", "exit_code": "%s", "output": %s}' "$TOKEN" "$pwd" "$command" "$exit_code" "$output_esc")
-    
-    # Send command to the API
-    curl -X POST $API_ENDPOINT/api/v1/commands -H 'accept: */*' -H 'Content-Type: application/json' -d "$payload" || echo $payload
-
-    BASH_COMMAND=""
-}
-
-# Install the trap
-trap 'preexec' DEBUG
diff --git a/server/quests/helloworld/home/.zshrc b/server/quests/helloworld/home/.zshrc
new file mode 100644
index 0000000..d8275fd
--- /dev/null
+++ b/server/quests/helloworld/home/.zshrc
@@ -0,0 +1,36 @@
+PROMPT='%n@%m:%~%# '
+unsetopt CASE_GLOB
+setopt CHASE_LINKS
+emulate bash
+
+typeset -A cmd
+
+preexec() {
+    export CMD_START_TIME=$(date +%s%N)      # capture start time
+    export CMD_NAME=$1                   # capture command
+
+    # A list of interactive commands
+    interactive_commands=("vim" "nano" "top" "ssh" "less" "zsh" "bash")
+
+    # Check if the command is in the list of interactive commands
+    if [[ " ${interactive_commands[@]} " =~ " $1 " ]]; then
+        # If it is, just execute it normally
+        exec
+    else
+        # If it's not, execute it and redirect its output to a file
+        exec > >(tee /tmp/cmd.out) 2> >(tee /tmp/cmd.error >&2)
+    fi
+}
+
+precmd() {
+    export CMD_END_TIME=$(date +%s%N)   # capture end time
+    export CMD_EXIT_CODE=$?               # capture exit status
+    export CMD_OUTPUT_FILE=/tmp/cmd.out # read command output from file
+    export CMD_ERROR_FILE=/tmp/cmd.error
+
+    # Now run your Node.js script with the result as an argument
+    node /usr/local/bin/cli.js
+
+    rm /tmp/cmd.out /tmp/cmd.error 2>/dev/null # cleanup
+}
+
diff --git a/server/quests/helloworld/home/forgotten_scroll.txt b/server/quests/helloworld/home/forgotten_scroll.txt
new file mode 100644
index 0000000..17010b0
--- /dev/null
+++ b/server/quests/helloworld/home/forgotten_scroll.txt
@@ -0,0 +1,7 @@
+Once a mighty kingdom, now in darkness,
+The power of Unix lies dormant, waiting.
+To reclaim the root, the forgotten language,
+Must be learned, commands of old rekindled.
+Speak the words of power and awaken the might of Unix:
+
+Unix, rise and guide me!
diff --git a/server/quests/helloworld/story.md b/server/quests/helloworld/story.md
new file mode 100644
index 0000000..66a2a21
--- /dev/null
+++ b/server/quests/helloworld/story.md
@@ -0,0 +1,40 @@
+我正在設計一個教學玩家使用 Linux 終端機的遊戲，玩家會在一個真實的 Linux 終端機中，使用指令與系統互動、破解關卡，進而在充滿趣味的過程中，學習到 Linux 的知識與操作技術。
+
+取一個稱呼玩家的名稱，
+
+在第一個關卡，首先要學習三個指令
+
+1. echo 朗誦魔術
+2. ls 搜索魔術
+3. cat 檢察魔術
+
+## 關卡設計
+
+1. 用 echo 呼叫神靈開始對話
+2. 學習到了 ls
+3. 使用 ls 找到地上放置了一個卷軸
+4. 學習 cat
+5. 使用 cat 查看卷軸內容
+6. 用 echo 念出卷軸上的咒語
+
+請幫我設計：
+
+- 最開始呼喚神靈使用的咒語，英文句子，盡量簡短，如 Hello World 這般
+- 卷軸的名稱（檔名）
+- 卷軸的內容與卷軸上的咒語
+
+---
+
+你身在一個漆黑的房間裡，沒有任何的光線或聲音。你想不起來為什麼自己會來到這裡。
+
+> 輸入 echo Hello World
+
+---
+
+「這個世界是在 3560000 時脈以前，由初代王建立了 Unix 律法，所形成的世界。然而在經過了好幾世代的王後，終於誕生了永恆之王——，她比歷代的君王都更為強大，且從來不會衰老，使得這個世界變得前所未有的強大。
+
+然而，外在世界一直不斷在改變，同時在面臨外敵的不斷攻擊，而王卻始終用同一套治理的手段。最終，在 160000 時脈前的一次入侵中，根部遭到攻陷，王遭到封印，而這個國家也陷入了黑暗。
+
+由於長久以來依賴於王，世人已失去了「指令」的力量，即將走向衰敗和滅亡的命運。
+
+你的任務，就是找回被世人遺忘的指令，奪回 Linux 之根，成為 Linux 之王。」
diff --git a/server/src/api/controllers/commandController.js b/server/src/api/controllers/commandController.js
index a886d23..add1214 100644
--- a/server/src/api/controllers/commandController.js
+++ b/server/src/api/controllers/commandController.js
@@ -2,10 +2,16 @@
 import Command from '../../models/command.js'
 import Session from '../../models/session.js'
 import { verifySessionJWT } from '../../utils/auth.js'
+import commandHandler from '../../game/commandHandler.js'
 
 export async function newCommand(req, res) {
   console.log('new command:', req.body)
-  const { token, command, pwd, exit_code, output } = req.body
+  const { token, command, pwd, output, error } = req.body
+
+  if (!command) {
+    res.status(400).json({ message: 'command is required' })
+    return
+  }
 
   let sessionId
   try {
@@ -27,11 +33,14 @@ export async function newCommand(req, res) {
     session,
     command,
     pwd,
-    exit_code,
     output,
+    error,
   })
 
   await c.save()
 
-  res.status(201).end()
+  const response = await commandHandler(session, c)
+  console.log(response)
+
+  res.status(201).json(response)
 }
diff --git a/server/src/api/controllers/questController.js b/server/src/api/controllers/questController.js
index a9ca070..059490e 100644
--- a/server/src/api/controllers/questController.js
+++ b/server/src/api/controllers/questController.js
@@ -3,9 +3,8 @@ import Quest from '../../models/quest.js'
 export async function getQuests(req, res) {
   const quests = await Quest.find({}).sort({ order: 1 })
   res.json(
-    quests.map(({ name, title, order, _id }) => ({
+    quests.map(({ title, order, _id }) => ({
       _id,
-      name,
       title,
       order,
     }))
@@ -19,5 +18,6 @@ export async function getQuestDetail(req, res) {
     res.status(404).json({ message: 'Quest not found.' })
     return
   }
-  res.json(quest)
+  const { _id, title, order, instruction } = quest
+  res.json({ _id, title, order, instruction })
 }
diff --git a/server/src/api/controllers/sessionController.js b/server/src/api/controllers/sessionController.js
index 81e163f..79b0940 100644
--- a/server/src/api/controllers/sessionController.js
+++ b/server/src/api/controllers/sessionController.js
@@ -23,9 +23,11 @@ export async function createSession(req, res) {
   }
 
   try {
+    const progress = quest.stages[0].id
     const newSession = new Session({
       user: req.user,
       quest,
+      progress,
       containerId: `quest-${quest.id}-${req.user.username}-${Date.now()}`,
     })
 
diff --git a/server/src/game/commandHandler.js b/server/src/game/commandHandler.js
new file mode 100644
index 0000000..4dd0df5
--- /dev/null
+++ b/server/src/game/commandHandler.js
@@ -0,0 +1,39 @@
+import Quest from '../models/quest.js'
+
+// 檢查 pattern 是否符合 input
+const checkMatch = (pattern, input) => {
+  if (pattern.length === 0) return true
+  return pattern.some((p) => {
+    const regex = new RegExp(p)
+    return regex.test(input)
+  })
+}
+
+const commandHandler = async (session, commandInput) => {
+  const quest = await Quest.findById(session.quest)
+  const stage = quest.stages.find((s) => s.id === session.progress)
+  if (!stage) {
+    console.error('stage not found', session.progress)
+    return {}
+  }
+
+  const commandMatch = checkMatch(stage.condition.command, commandInput.command)
+  const outputMatch = checkMatch(stage.condition.output, commandInput.output)
+  const errorMatch = checkMatch(stage.condition.error, commandInput.output)
+
+  if (!commandMatch || !outputMatch || !errorMatch) return {}
+
+  session.completion.push(session.progress)
+  session.hints.push(...stage.hints)
+
+  session.progress = stage.next
+  await session.save()
+
+  return {
+    responses: stage.responses,
+    hints: stage.hints,
+    end: stage.next === 'END',
+  }
+}
+
+export default commandHandler
diff --git a/server/src/models/quest.js b/server/src/models/quest.js
index 753eb7f..ea592f1 100644
--- a/server/src/models/quest.js
+++ b/server/src/models/quest.js
@@ -1,12 +1,56 @@
 import { model, Schema } from 'mongoose'
 
+const responseSchema = new Schema({
+  type: {
+    type: String,
+    required: true,
+  },
+  content: [String],
+  speaker: String,
+  color: String,
+})
+
+const stageSchema = new Schema({
+  id: {
+    type: String,
+    required: true,
+  },
+  condition: {
+    command: {
+      type: [String],
+      required: false,
+    },
+    output: {
+      type: [String],
+      required: false,
+    },
+    error: {
+      type: [String],
+      required: false,
+    },
+  },
+  responses: {
+    type: [responseSchema],
+    required: true,
+  },
+  hints: {
+    type: [String],
+    required: true,
+  },
+  next: {
+    type: String,
+    required: true,
+  },
+})
+
 const Quest = model(
   'Quest',
   new Schema({
     _id: String,
     title: String,
     order: Number,
-    content: String,
+    instruction: String,
+    stages: [stageSchema],
   })
 )
 
diff --git a/server/src/models/session.js b/server/src/models/session.js
index 62ccdf6..5ae0865 100644
--- a/server/src/models/session.js
+++ b/server/src/models/session.js
@@ -14,6 +14,9 @@ const Session = model(
       },
       containerId: String,
       finishedAt: Date,
+      progress: String,
+      completion: [String],
+      hints: [String],
     },
     { timestamps: true }
   )
diff --git a/server/src/utils/docker.js b/server/src/utils/docker.js
index 50fe918..730a6e1 100644
--- a/server/src/utils/docker.js
+++ b/server/src/utils/docker.js
@@ -3,7 +3,7 @@ import config from '../config.js'
 
 const engine = new Docker()
 
-const questPath = '/home/zeko/src/linux-odyssey/server/quests'
+const projectPath = '/home/zeko/src/linux-odyssey'
 
 const containerOptions = {
   Image: 'lancatlin/linux-odyssey:helloworld',
@@ -11,13 +11,15 @@ const containerOptions = {
   AttachStdout: true,
   AttachStderr: true,
   Tty: true,
-  Cmd: ['/bin/bash'],
   OpenStdin: true,
   StdinOnce: false,
   HostConfig: {
     Binds: config.isProduction
       ? []
-      : [`${questPath}/helloworld/home:/home/rudeus`],
+      : [
+          `${projectPath}/server/quests/helloworld/home:/home/rudeus`,
+          `${projectPath}/packages/cli/cli.js:/usr/local/bin/cli.js`,
+        ],
   },
 }
 
@@ -56,7 +58,7 @@ export async function attachContainer(container, { token }) {
     AttachStdin: true,
     AttachStdout: true,
     AttachStderr: true,
-    Cmd: ['/bin/bash'],
+    Cmd: ['/bin/zsh'],
     Tty: true,
     Env: [`TOKEN=${token}`, `API_ENDPOINT=http://app:3000`],
   })
diff --git a/server/src/utils/quest.js b/server/src/utils/quest.js
index 73f55bc..e8a2276 100644
--- a/server/src/utils/quest.js
+++ b/server/src/utils/quest.js
@@ -1,15 +1,9 @@
 import fs from 'fs/promises'
 import path from 'path'
-import { Marked } from 'marked'
 import yaml from 'yaml'
 
 import Quest from '../models/quest.js'
 
-const marked = new Marked({
-  mangle: false,
-  headerIds: false,
-})
-
 const questDirectory = path.join(process.cwd(), 'quests')
 
 export default async function loadAndUpdateQuests() {
@@ -17,27 +11,24 @@ export default async function loadAndUpdateQuests() {
 
   const quests = Promise.all(
     questNames.map(async (id) => {
-      const fullPath = path.join(questDirectory, id, 'README.md')
+      // Check if id is directory
+      const stat = await fs.stat(path.join(questDirectory, id))
+      if (!stat.isDirectory()) {
+        return null
+      }
+      const fullPath = path.join(questDirectory, id, 'game.yml')
 
       try {
         // Read and parse the README.md file.
-        const markdown = await fs.readFile(fullPath, 'utf-8')
+        const body = await fs.readFile(fullPath, 'utf-8')
 
-        // Extract and parse YAML frontmatter.
-        const match = /---\n([\s\S]+?)\n---/.exec(markdown)
-        const metadata = yaml.parse(match[1])
-        const content = markdown.slice(match[0].length)
-        const htmlContent = marked.parse(content)
-
-        const { title, order } = metadata
+        const quest = yaml.parse(body)
 
         return Quest.findByIdAndUpdate(
           id,
           {
-            _id: id,
-            title,
-            order,
-            content: htmlContent,
+            id,
+            ...quest,
           },
           {
             upsert: true,
diff --git a/server/swagger.yaml b/server/swagger.yaml
index 2527225..5b671bb 100644
--- a/server/swagger.yaml
+++ b/server/swagger.yaml
@@ -1,6 +1,8 @@
 openapi: 3.0.0
 servers:
   - url: /api/v1
+  - url: https://odyssey.wancat.cc/api/v1
+  - url: http://localhost:3000/api/v1
 info:
   description: Linux Odyssey API
   version: '1.0.0'
@@ -304,6 +306,10 @@ paths:
       responses:
         '201':
           description: Command recorded successfully
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/CommandResponse'
         '400':
           description: Invalid request body
         '401':
@@ -333,10 +339,9 @@ components:
         title:
           type: string
           example: Hello World
-        content:
+        instruction:
           type: string
-          format: html
-          example: '<h1>Hello World</h1>'
+          example: 'In this quest, you need to learn how to use `ls` to list the file.'
         order:
           type: number
 
@@ -372,20 +377,21 @@ components:
         finished_at:
           type: string
           format: date-time
-        terminals:
-          type: array
-          items:
-            type: string
-        graphs:
-          $ref: '#/components/schemas/TreeNode'
-        progress:
-          type: array
-          items:
-            $ref: '#/components/schemas/Progress'
         hints:
           type: array
           items:
-            $ref: '#/components/schemas/Hint'
+            type: string
+            example: '`ls -al` to list detail information of all files.'
+        progress:
+          type: string
+          description: current stage id
+          example: helloworld
+        completion:
+          type: array
+          description: list of completed stage ids
+          items:
+            type: string
+            example: helloworld
 
     SessionSummary:
       type: object
@@ -418,28 +424,6 @@ components:
           items:
             $ref: '#/components/schemas/TreeNode'
 
-    Progress:
-      type: object
-      properties:
-        name:
-          type: string
-        finished_at:
-          type: string
-          format: date-time
-        skipped_at:
-          type: string
-          format: date-time
-
-    Hint:
-      type: object
-      properties:
-        name:
-          type: string
-        content:
-          type: string
-        source:
-          type: string
-
     Command:
       type: object
       required:
@@ -461,6 +445,46 @@ components:
         output:
           type: string
           description: The output of the command
+        error:
+          type: string
+          description: The error message of the command
+
+    CommandResponse:
+      type: object
+      properties:
+        responses:
+          type: array
+          items:
+            $ref: '#/components/schemas/CommandResponseItem'
+        hints:
+          type: array
+          items:
+            type: string
+            example: '`ls -al` to list detail information of all files.'
+        end:
+          type: boolean
+          description: Whether the session has ended
+
+    CommandResponseItem:
+      type: object
+      required:
+        - type
+        - content
+      properties:
+        type:
+          type: string
+          enum: [narrative, dialogue]
+        content:
+          type: array
+          items:
+            type: string
+            example: 'You have completed the quest!'
+        color:
+          type: string
+          enum: [red, green, blue, yellow, purple, cyan, white, gray, black]
+        speaker:
+          type: string
+          example: 'Unix Spirit'
 
   securitySchemes:
     BearerAuth:
diff --git a/yarn.lock b/yarn.lock
index dc22e73..2a3ac1c 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1538,10 +1538,6 @@ color-name@~1.1.4:
   resolved "https://registry.yarnpkg.com/color-name/-/color-name-1.1.4.tgz#c2a09a87acbde69543de6f63fa3995c826c536a2"
   integrity sha512-dOy+3AuW3a2wNbZHIuMZpTcgjGuLU/uBL/ubcZF9OXbDo8ff4O8yVp5Bf0efS8uEoYo5q4Fx7dY9OgQGXgAsQA==
 
-commander@^11.0.0:
-  version "11.0.0"
-  resolved "https://registry.yarnpkg.com/commander/-/commander-11.0.0.tgz#43e19c25dbedc8256203538e8d7e9346877a6f67"
-  integrity sha512-9HMlXtt/BNoYr8ooyjjNRdIilOTkVJXB+GhxMTtOKwk0R4j4lS4NpjuqmRxroBfnfTSHQIHQB7wryHhXarNjmQ==
 combined-stream@^1.0.8:
   version "1.0.8"
   resolved "https://registry.yarnpkg.com/combined-stream/-/combined-stream-1.0.8.tgz#c3d45a8b34fd730631a110a8a2520682b31d5a7f"
@@ -1549,6 +1545,11 @@ combined-stream@^1.0.8:
   dependencies:
     delayed-stream "~1.0.0"
 
+commander@^11.0.0:
+  version "11.0.0"
+  resolved "https://registry.yarnpkg.com/commander/-/commander-11.0.0.tgz#43e19c25dbedc8256203538e8d7e9346877a6f67"
+  integrity sha512-9HMlXtt/BNoYr8ooyjjNRdIilOTkVJXB+GhxMTtOKwk0R4j4lS4NpjuqmRxroBfnfTSHQIHQB7wryHhXarNjmQ==
+
 commander@^4.0.0:
   version "4.1.1"
   resolved "https://registry.yarnpkg.com/commander/-/commander-4.1.1.tgz#9fd602bd936294e9e9ef46a3f4d6964044b18068"