diff --git a/src/lib/services/clients.service.ts b/src/lib/services/clients.service.ts
index bb25aa5e..69364979 100644
--- a/src/lib/services/clients.service.ts
+++ b/src/lib/services/clients.service.ts
@@ -22,7 +22,7 @@ import { setEntityTags } from '@/lib/services/entity-tags.helper';
 import { emitToRoom } from '@/lib/socket/server';
 import { buildListQuery } from '@/lib/db/query-builder';
 import { diffEntity } from '@/lib/entity-diff';
-import { softDelete, restore, withTransaction } from '@/lib/db/utils';
+import { restore, withTransaction } from '@/lib/db/utils';
 import { logger } from '@/lib/logger';
 import {
   syncEntityFolderName,
@@ -555,17 +555,37 @@ export async function archiveClient(id: string, portId: string, meta: AuditMeta)
     throw new NotFoundError('Client');
   }
 
-  await softDelete(clients, clients.id, id);
+  // F10: cascade-archive the client's open interests so they don't
+  // dangle in active queries with a shadowed client. Won/lost interests
+  // (outcome IS NOT NULL) are kept as historical records — only IN-FLIGHT
+  // deals get archived. Wrapped in a single transaction so a partial
+  // archive can't leave the system half-cascaded.
+  const archivedInterestIds: string[] = await db.transaction(async (tx) => {
+    await tx
+      .update(clients)
+      .set({ archivedAt: new Date(), updatedAt: new Date() })
+      .where(eq(clients.id, id));
+    const cascaded = await tx
+      .update(interests)
+      .set({ archivedAt: new Date(), updatedAt: new Date() })
+      .where(
+        and(
+          eq(interests.clientId, id),
+          eq(interests.portId, portId),
+          isNull(interests.archivedAt),
+          isNull(interests.outcome),
+        ),
+      )
+      .returning({ id: interests.id });
+    return cascaded.map((r) => r.id);
+  });
 
   // fire-and-forget: archive UI does not depend on the folder suffix
   // being stamped before the HTTP response returns. Task 5 (rename
   // hook) uses await because the rename should be visible to the
   // next read; archive does not.
   void applyEntityArchivedSuffix(portId, 'client', id, meta.userId).catch((err) => {
-    logger.warn(
-      { err, clientId: id, portId },
-      'Failed to apply archived suffix to client folder',
-    );
+    logger.warn({ err, clientId: id, portId }, 'Failed to apply archived suffix to client folder');
   });
 
   void createAuditLog({
@@ -574,11 +594,18 @@ export async function archiveClient(id: string, portId: string, meta: AuditMeta)
     action: 'archive',
     entityType: 'client',
     entityId: id,
+    // Surface the cascade in the audit trail so /admin/audit shows
+    // exactly which interests got swept up.
+    newValue:
+      archivedInterestIds.length > 0 ? { cascadedInterestIds: archivedInterestIds } : undefined,
     ipAddress: meta.ipAddress,
     userAgent: meta.userAgent,
   });
 
   emitToRoom(`port:${portId}`, 'client:archived', { clientId: id });
+  for (const interestId of archivedInterestIds) {
+    emitToRoom(`port:${portId}`, 'interest:archived', { interestId });
+  }
 
   void import('@/lib/services/webhook-dispatch').then(({ dispatchWebhookEvent }) =>
     dispatchWebhookEvent(portId, 'client:archived', { clientId: id }),
@@ -597,10 +624,7 @@ export async function restoreClient(id: string, portId: string, meta: AuditMeta)
   await restore(clients, clients.id, id);
 
   void applyEntityRestoredSuffix(portId, 'client', id, meta.userId).catch((err) => {
-    logger.warn(
-      { err, clientId: id, portId },
-      'Failed to clear archived suffix on client folder',
-    );
+    logger.warn({ err, clientId: id, portId }, 'Failed to clear archived suffix on client folder');
   });
 
   void createAuditLog({