diff --git a/app/src/store/session.ts b/app/src/store/session.ts
index 150c064..64d74dc 100644
--- a/app/src/store/session.ts
+++ b/app/src/store/session.ts
@@ -1,6 +1,6 @@
 import { defineStore } from 'pinia'
 import { FileGraph, FileObject } from '@linux-odyssey/file-graph'
-import { QuestDetailResponse } from '@linux-odyssey/constants'
+import { QuestDetailResponse } from '../../../packages/constants/dist/src'
 import { createSession, getActiveSession } from '../utils/api'
 import Socket from '../utils/socket'
 import SocketTerminal from '../utils/terminal'
diff --git a/app/src/utils/api.ts b/app/src/utils/api.ts
index 5c9015f..19c589e 100644
--- a/app/src/utils/api.ts
+++ b/app/src/utils/api.ts
@@ -1,5 +1,4 @@
 import axios from 'axios'
-import { GetSessionsRequest } from '@linux-odyssey/constants'
 import { Session } from '../types'
 
 const api = axios.create({
@@ -16,13 +15,6 @@ export async function createSession(questId: string): Promise<Session> {
   return res.data
 }
 
-export async function getSessions(
-  request: GetSessionsRequest
-): Promise<Session[]> {
-  const res = await api.get<Session[]>('/sessions', { params: request })
-  return res.data
-}
-
 export async function getActiveSession(
   questId: string
 ): Promise<Session | null> {
diff --git a/app/src/views/RegisterPage.vue b/app/src/views/RegisterPage.vue
index 6fd0d67..36b73d8 100644
--- a/app/src/views/RegisterPage.vue
+++ b/app/src/views/RegisterPage.vue
@@ -1,7 +1,7 @@
 <script setup lang="ts">
 import validator from 'validator'
 import { isValidUsername } from '@linux-odyssey/utils'
-import { passwordPolicy } from '@linux-odyssey/constants'
+import { passwordPolicy } from '../../../packages/constants/dist/src'
 import AuthForm from '../components/AuthForm.vue'
 import DynamicBackground from '../components/DynamicBackground.vue'
 import HeaderPart from '../components/header/HeaderPart.vue'
diff --git a/packages/constants/index.ts b/packages/constants/src/index.ts
similarity index 89%
rename from packages/constants/index.ts
rename to packages/constants/src/index.ts
index 563849a..2380b82 100644
--- a/packages/constants/index.ts
+++ b/packages/constants/src/index.ts
@@ -1,6 +1,7 @@
 import { z } from 'zod'
 
-export * from './src/quest.js'
+export * from './quest.js'
+export * from './session.js'
 
 export const passwordPolicy = {
   minLength: 8,
diff --git a/packages/constants/src/session.ts b/packages/constants/src/session.ts
new file mode 100644
index 0000000..4dba430
--- /dev/null
+++ b/packages/constants/src/session.ts
@@ -0,0 +1,15 @@
+export interface SessionSummaryResponse {
+  _id: string
+  user: string
+  quest: string
+  status: string
+  createdAt: Date
+  lastActivityAt: Date
+}
+
+export interface SessionDetailResponse extends SessionSummaryResponse {
+  hints: string[][]
+  tasks: string[][]
+  responses: string[][]
+  graph: any
+}
diff --git a/packages/constants/tsconfig.json b/packages/constants/tsconfig.json
index 4972b05..43feaec 100644
--- a/packages/constants/tsconfig.json
+++ b/packages/constants/tsconfig.json
@@ -4,7 +4,8 @@
     "composite": true,
     "module": "Node16",
     "moduleResolution": "node16",
-    "outDir": "./dist"
+    "outDir": "./dist",
+    "rootDir": "src"
   },
   "include": ["*.js", "*.ts", "src/**/*.ts"],
   "exclude": ["node_modules", "dist"]
diff --git a/server/src/routers/sessionRouter.ts b/server/src/routers/sessionRouter.ts
new file mode 100644
index 0000000..3fee166
--- /dev/null
+++ b/server/src/routers/sessionRouter.ts
@@ -0,0 +1,48 @@
+import { TRPCError } from '@trpc/server'
+import { Session } from '@linux-odyssey/models'
+import { z } from 'zod'
+import { isQuestUnlocked } from '../models/sessionManager.js'
+import config from '../config.js'
+import { protectedProcedure, router } from '../trpc.js'
+
+export const sessionRouter = router({
+  getActiveSession: protectedProcedure
+    .input(
+      z.object({
+        questId: z.string(),
+      })
+    )
+    .query(async (opts) => {
+      const { questId } = opts.input
+      const { user } = opts.ctx
+      if (
+        user &&
+        ((await isQuestUnlocked(user, questId)) || config.testing.enabled)
+      ) {
+        const session = await Session.findOne({
+          user: user.id,
+          quest: questId,
+          status: 'active',
+        })
+        if (!session) {
+          return null
+        }
+        return {
+          _id: session._id.toString(),
+          user: session.user,
+          quest: session.quest,
+          status: session.status,
+          createdAt: session.createdAt,
+          lastActivityAt: session.lastActivityAt,
+          hints: session.hints,
+          tasks: session.tasks,
+          responses: session.responses,
+          graph: session.graph,
+        }
+      }
+      throw new TRPCError({
+        code: 'BAD_REQUEST',
+        message: 'Quest is locked',
+      })
+    }),
+})