diff --git a/app/(app)/ideas/[id]/sync-tab-server.ts b/app/(app)/ideas/[id]/sync-tab-server.ts
new file mode 100644
index 0000000..ae93465
--- /dev/null
+++ b/app/(app)/ideas/[id]/sync-tab-server.ts
@@ -0,0 +1,85 @@
+import 'server-only'
+import { prisma } from '@/lib/prisma'
+
+// Server-only loader voor de Sync-tab op /ideas/[id].
+// Joint Idea → PBI → Stories → Tasks → ClaudeJobs + StoryLog.
+// Auth-scope: strikt user_id-only conform M12-keuze 2.
+//
+// Returns null wanneer:
+// - idea bestaat niet of behoort niet aan user
+// - idea heeft geen pbi_id (status !== PLANNED, dus sync-tab niet relevant)
+//
+// Caller (page.tsx) moet de tab niet renderen als deze null retourneert.
+export async function loadIdeaSyncData(ideaId: string, userId: string) {
+  const idea = await prisma.idea.findFirst({
+    where: { id: ideaId, user_id: userId },
+    select: {
+      id: true,
+      code: true,
+      title: true,
+      status: true,
+      pbi_id: true,
+      product: { select: { id: true, name: true, repo_url: true } },
+      pbi: {
+        select: {
+          id: true,
+          code: true,
+          title: true,
+          pr_url: true,
+          pr_merged_at: true,
+          stories: {
+            orderBy: { sort_order: 'asc' },
+            select: {
+              id: true,
+              code: true,
+              title: true,
+              status: true,
+              tasks: {
+                orderBy: { sort_order: 'asc' },
+                select: {
+                  id: true,
+                  code: true,
+                  title: true,
+                  status: true,
+                  claude_jobs: {
+                    where: { kind: 'TASK_IMPLEMENTATION' },
+                    orderBy: { created_at: 'desc' },
+                    select: {
+                      id: true,
+                      status: true,
+                      branch: true,
+                      pushed_at: true,
+                      pr_url: true,
+                      error: true,
+                      summary: true,
+                      created_at: true,
+                      finished_at: true,
+                    },
+                  },
+                },
+              },
+              logs: {
+                orderBy: { created_at: 'desc' },
+                take: 20,
+                select: {
+                  id: true,
+                  type: true,
+                  content: true,
+                  status: true,
+                  commit_hash: true,
+                  commit_message: true,
+                  created_at: true,
+                },
+              },
+            },
+          },
+        },
+      },
+    },
+  })
+
+  if (!idea || !idea.pbi) return null
+  return idea
+}
+
+export type IdeaSyncData = NonNullable<Awaited<ReturnType<typeof loadIdeaSyncData>>>