diff --git a/apps/worker/src/queues/ingest.processor.test.ts b/apps/worker/src/queues/ingest.processor.test.ts
index 594db90..33dd3e4 100644
--- a/apps/worker/src/queues/ingest.processor.test.ts
+++ b/apps/worker/src/queues/ingest.processor.test.ts
@@ -10,6 +10,7 @@ const mockPrisma = {
 const sampleJob: IngestJobData = {
   platformMsgId: 'WA_MSG_001',
   platform: 'whatsapp',
+  accountId: 'account-1',
   sourceGroupId: 'clxxxxxx',
   senderJid: '919876543210@s.whatsapp.net',
   senderName: 'Alice',
diff --git a/apps/worker/src/whatsapp/group-sync.test.ts b/apps/worker/src/whatsapp/group-sync.test.ts
index c5a4d18..7488503 100644
--- a/apps/worker/src/whatsapp/group-sync.test.ts
+++ b/apps/worker/src/whatsapp/group-sync.test.ts
@@ -48,7 +48,7 @@ describe('syncGroups', () => {
       .mockResolvedValueOnce({ id: 'db-group-1' })
       .mockResolvedValueOnce({ id: 'db-group-2' });
 
-    const result = await syncGroups(mockGroups, mockPrisma as any);
+    const result = await syncGroups(mockGroups, 'account-1', mockPrisma as any);
 
     expect(mockPrisma.group.upsert).toHaveBeenCalledTimes(2);
     expect(result.get('120363043312345678@g.us')).toBe('db-group-1');
@@ -60,6 +60,7 @@ describe('syncGroups', () => {
 
     await syncGroups(
       { '120363043312345678@g.us': mockGroups['120363043312345678@g.us'] },
+      'account-1',
       mockPrisma as any,
     );
 
@@ -71,8 +72,13 @@ describe('syncGroups', () => {
         name: 'UP Parivar Dallas',
         description: 'Main community group',
         isActive: true,
+        accountId: 'account-1',
+      },
+      update: {
+        name: 'UP Parivar Dallas',
+        description: 'Main community group',
+        accountId: 'account-1',
       },
-      update: { name: 'UP Parivar Dallas', description: 'Main community group' },
     });
   });
 
@@ -81,18 +87,19 @@ describe('syncGroups', () => {
 
     await syncGroups(
       { '999999999@g.us': mockGroups['999999999@g.us'] },
+      'account-1',
       mockPrisma as any,
     );
 
     expect(mockPrisma.group.upsert).toHaveBeenCalledWith(
       expect.objectContaining({
-        create: expect.objectContaining({ description: undefined }),
+        create: expect.objectContaining({ description: undefined, accountId: 'account-1' }),
       }),
     );
   });
 
   it('returns an empty map when given empty groups', async () => {
-    const result = await syncGroups({}, mockPrisma as any);
+    const result = await syncGroups({}, 'account-1', mockPrisma as any);
     expect(result.size).toBe(0);
     expect(mockPrisma.group.upsert).not.toHaveBeenCalled();
   });
diff --git a/apps/worker/src/whatsapp/group-sync.ts b/apps/worker/src/whatsapp/group-sync.ts
index 9198f63..11dfc5b 100644
--- a/apps/worker/src/whatsapp/group-sync.ts
+++ b/apps/worker/src/whatsapp/group-sync.ts
@@ -1,7 +1,11 @@
 import { GroupMetadata } from '@whiskeysockets/baileys';
+import { createLogger } from '@tower/logger';
+
+const logger = createLogger('group-sync');
 
 export async function syncGroups(
   groups: Record<string, GroupMetadata>,
+  accountId: string,
   prisma: any,
 ): Promise<Map<string, string>> {
   const jidToDbId = new Map<string, string>();
@@ -15,11 +19,17 @@ export async function syncGroups(
         name: meta.subject,
         description: meta.desc ?? undefined,
         isActive: true,
+        accountId,
+      },
+      update: {
+        name: meta.subject,
+        description: meta.desc ?? undefined,
+        accountId,
       },
-      update: { name: meta.subject, description: meta.desc ?? undefined },
     });
     jidToDbId.set(jid, group.id);
   }
 
+  logger.info({ count: jidToDbId.size, accountId }, 'Groups synced');
   return jidToDbId;
 }
diff --git a/apps/worker/src/whatsapp/session-pool.ts b/apps/worker/src/whatsapp/session-pool.ts
new file mode 100644
index 0000000..816991b
--- /dev/null
+++ b/apps/worker/src/whatsapp/session-pool.ts
@@ -0,0 +1,57 @@
+import { WASocket } from '@whiskeysockets/baileys';
+import { NormalizedMessage, NormalizedReaction } from '@tower/types';
+import { createWhatsAppSession } from './session';
+import { createLogger } from '@tower/logger';
+
+const logger = createLogger('session-pool');
+
+// Callbacks the pool exposes — accountId injected by pool, not caller
+export type PoolMessageCallback = (msg: NormalizedMessage, accountId: string) => Promise<void> | void;
+export type PoolReactionCallback = (reaction: NormalizedReaction, accountId: string) => Promise<void> | void;
+// groups typed as `any` to avoid leaking GroupMetadata (Baileys type) into main.ts
+export type PoolGroupsCallback = (groups: any, accountId: string) => Promise<void> | void;
+
+export class WhatsAppSessionPool {
+  private sessions = new Map<string, WASocket>();
+
+  async add(
+    accountId: string,
+    sessionPath: string,
+    onMessage: PoolMessageCallback,
+    onReaction: PoolReactionCallback,
+    onGroups: PoolGroupsCallback,
+  ): Promise<void> {
+    logger.info({ accountId }, 'Starting session');
+    const sock = await createWhatsAppSession(
+      accountId,
+      sessionPath,
+      (msg) => onMessage(msg, accountId),
+      (reaction) => onReaction(reaction, accountId),
+      (groups) => onGroups(groups, accountId),
+    );
+    this.sessions.set(accountId, sock);
+  }
+
+  get(accountId: string): WASocket | undefined {
+    return this.sessions.get(accountId);
+  }
+
+  getAll(): Map<string, WASocket> {
+    return this.sessions;
+  }
+
+  async sendMessage(accountId: string, groupJid: string, text: string): Promise<void> {
+    const sock = this.sessions.get(accountId);
+    if (!sock) throw new Error(`No active session for account ${accountId}`);
+    await sock.sendMessage(groupJid, { text });
+  }
+
+  async remove(accountId: string): Promise<void> {
+    const sock = this.sessions.get(accountId);
+    if (sock) {
+      await sock.logout().catch(() => {});
+      this.sessions.delete(accountId);
+      logger.info({ accountId }, 'Session removed');
+    }
+  }
+}