diff --git a/prisma/launcher.schema.prisma b/prisma/launcher.schema.prisma
index 5f35426..dd28c3b 100644
--- a/prisma/launcher.schema.prisma
+++ b/prisma/launcher.schema.prisma
@@ -77,6 +77,9 @@ model ProvisionedDevice {
   kernel            String?
   distro            String?
   device            Json?
+  agentVersion      String?  @map("agent_version")
+  agentUpdatedAt    DateTime? @map("agent_updated_at") @db.Timestamptz(3)
+  agentLastSeenAt   DateTime? @map("agent_last_seen_at") @db.Timestamptz(3)
   installedAt       DateTime @default(now()) @map("installed_at") @db.Timestamptz(3)
   lastProvisionedAt DateTime @default(now()) @map("last_provisioned_at") @db.Timestamptz(3)
   createdAt         DateTime @default(now()) @map("created_at") @db.Timestamptz(3)
@@ -85,6 +88,7 @@ model ProvisionedDevice {
   @@unique([accountEmail, tailscaleHostname])
   @@index([accountEmail])
   @@index([tailscaleHostname])
+  @@index([agentLastSeenAt])
   @@map("provisioned_devices")
 }
 
diff --git a/src/gitea/gitea.service.ts b/src/gitea/gitea.service.ts
index 52fe4e3..0191527 100644
--- a/src/gitea/gitea.service.ts
+++ b/src/gitea/gitea.service.ts
@@ -1,4 +1,5 @@
 import {
+  BadRequestException,
   BadGatewayException,
   Injectable,
   UnauthorizedException,
@@ -118,6 +119,10 @@ export class GiteaService {
     params.set('page', String(page));
     if (query.sha) {
       params.set('sha', query.sha);
+      const { branches } = await this.listBranches(owner, repo) as { branches: Array<{ name?: string }> };
+      if (!branches.some((branch) => branch.name === query.sha)) {
+        throw new BadRequestException('해당 브랜치가 없습니다.');
+      }
     }
     if (query.since) {
       params.set('since', query.since);