diff --git a/manifests/core/worker-script.yaml b/manifests/core/worker-script.yaml
index 4f1cc73..5dc4af8 100644
--- a/manifests/core/worker-script.yaml
+++ b/manifests/core/worker-script.yaml
@@ -48,6 +48,20 @@ data:
     # waiting on a slow-but-legitimate response, causing a duplicate forward.
     ACK_WAIT_SECONDS = int(os.getenv("ACK_WAIT_SECONDS", "60"))
 
+    # Fiesta is a *separate application* (separate repo, separate binary,
+    # separate business line - jupiter and Fiesta only happen to share one
+    # Postgres instance). Its tenants' orders need Fiesta's own CreateOrderv3
+    # (item validation, atomic order numbers, stock-insufficient checks) -
+    # jupiter has no equivalent logic and was never meant to process this
+    # tenant population. jupiter and Fiesta share one `tenants` table with
+    # no single clean column to tell them apart, so this is an explicit
+    # allowlist rather than a heuristic. Expand FIESTA_TENANT_IDS as more
+    # Fiesta tenants are identified (2026-07-29).
+    FIESTA_BASE_URL = os.getenv("FIESTA_BASE_URL", "http://fiesta.nearle")
+    FIESTA_TENANT_IDS = set(
+        int(t) for t in os.getenv("FIESTA_TENANT_IDS", "").split(",") if t.strip()
+    )
+
     # Endpoint mapping is still useful for constructing the target URL
     ENDPOINT_MAPPING = {
         "/live/api/v1/deliveries/createdeliveries": f"{BASE_URL}/live/api/v1/deliveries/createdeliveries",
@@ -56,13 +70,13 @@ data:
         "/live/api/v2/deliveries/createdeliverylog": f"{BASE_URL}/live/api/v2/deliveries/createdeliverylog",
         "/live/api/v2/partners/createbreaklog": f"{BASE_URL}/live/api/v2/partners/createbreaklog",
         "/live/api/v2/partners/updatebreaklog": f"{BASE_URL}/live/api/v2/partners/updatebreaklog",
-        # v1 CreateOrder only ever writes the order header - it never loops
-        # over "items", so orderdetails/productstocks are never touched.
-        # CreateOrderv3 does ("for _, item := range data.Items"), and the
-        # loop is a no-op when Items is empty, so tenants who never send
-        # items (their whole order history is header-only, e.g. 916/908)
-        # behave identically. Tenants who do send items now get them
-        # persisted instead of silently dropped (2026-07-29).
+        # Default target for non-Fiesta tenants (jupiter). v1 CreateOrder
+        # only ever writes the order header - it never loops over "items".
+        # CreateOrderv3 does, and the loop is a no-op when Items is empty,
+        # so jupiter-native tenants who never send items (e.g. 916/908)
+        # behave identically either way. Fiesta tenants are redirected to
+        # their own backend below, in forward_to_external - this mapping
+        # is only the fallback for everyone else.
         "/live/api/v1/mob/orders/createorder": f"{BASE_URL}/live/api/v3/orders/createorder",
         "/live/api/v1/web/products/create": f"{BASE_URL}/live/api/v1/products/create",
         "/live/api/v1/mob/customers/login": f"{BASE_URL}/live/api/v1/customers/login",
@@ -105,6 +119,27 @@ data:
             return "DROP", None
         data_to_forward = payload["data"]
 
+        # Fiesta-tenant orders go to Fiesta's own backend instead of jupiter
+        # - see FIESTA_TENANT_IDS above. tenantid may arrive nested under
+        # "orders" (mobile app shape) or flat (direct/API-tool shape); this
+        # is only used to pick the target, Fiesta's own handler does its own
+        # (more thorough) parsing of the actual body.
+        if endpoint == "/live/api/v1/mob/orders/createorder" and FIESTA_TENANT_IDS:
+            tenantid = None
+            if isinstance(data_to_forward, dict):
+                orders_obj = data_to_forward.get("orders")
+                if isinstance(orders_obj, dict) and "tenantid" in orders_obj:
+                    tenantid = orders_obj.get("tenantid")
+                elif "tenantid" in data_to_forward:
+                    tenantid = data_to_forward.get("tenantid")
+            try:
+                tenantid = int(tenantid) if tenantid is not None else None
+            except (TypeError, ValueError):
+                tenantid = None
+            if tenantid in FIESTA_TENANT_IDS:
+                external_url = f"{FIESTA_BASE_URL}{endpoint}"
+                print(f"?? Routing tenant {tenantid} createorder to Fiesta backend")
+
         # Payload Normalization for logs
         if endpoint == "/live/api/v2/deliveries/createdeliverylog":
             if isinstance(data_to_forward, dict):
diff --git a/manifests/core/workers.yaml b/manifests/core/workers.yaml
index cd33d74..c6c2c6b 100644
--- a/manifests/core/workers.yaml
+++ b/manifests/core/workers.yaml
@@ -98,6 +98,14 @@ spec:
               optional: true
         - name: EXTERNAL_BASE_URL
           value: "http://jupiter.nearle"
+        - name: FIESTA_BASE_URL
+          value: "http://fiesta.nearle"
+        # Known Fiesta tenants (R mart=1147, Suriya Store=1135, confirmed
+        # 2026-07-29). Expand as more are identified - see worker.py's
+        # FIESTA_TENANT_IDS comment for why this is an explicit list rather
+        # than a DB heuristic.
+        - name: FIESTA_TENANT_IDS
+          value: "1147,1135"
         resources:
           requests:
             memory: "128Mi"