diff --git a/cluster/platform/openviking/deployment-maelstrom.yaml b/cluster/platform/openviking/deployment-maelstrom.yaml
new file mode 100644
index 0000000..e36d415
--- /dev/null
+++ b/cluster/platform/openviking/deployment-maelstrom.yaml
@@ -0,0 +1,37 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: maelstrom-ui
+  namespace: openviking
+spec:
+  replicas: 1
+  selector:
+    matchLabels: { app: maelstrom-ui }
+  template:
+    metadata:
+      labels: { app: maelstrom-ui }
+    spec:
+      containers:
+        - name: maelstrom-ui
+          image: the-seas.local.mk-labs.cloud/library/maelstrom-ui:v0.3.17-1
+          ports: [{ containerPort: 80 }]
+          env:
+            - name: MAELSTROM_UI_KEY
+              valueFrom:
+                secretKeyRef:
+                  name: maelstrom-ui-credentials
+                  key: maelstrom_ui_key
+          resources:
+            requests: { cpu: 50m, memory: 64Mi }
+            limits: { cpu: 200m, memory: 128Mi }
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: maelstrom-ui
+  namespace: openviking
+spec:
+  selector: { app: maelstrom-ui }
+  ports:
+    - port: 80
+      targetPort: 80
diff --git a/cluster/platform/openviking/externalsecret-maelstrom.yaml b/cluster/platform/openviking/externalsecret-maelstrom.yaml
new file mode 100644
index 0000000..90ae8c2
--- /dev/null
+++ b/cluster/platform/openviking/externalsecret-maelstrom.yaml
@@ -0,0 +1,30 @@
+# ExternalSecret - maelstrom-ui scoped API key
+# Per inbox/ryan/2026-08-14-maelstrom-key-approval.md: Ryan approved pre-seeding
+# via ExternalSecret (option b) since Ryan is the sole user of the pilot.
+# Scoped key (resources/search/tasks read-only, no bot/admin) minted by Nick Fury,
+# see system/inbox/agents/nick-fury/2026-08-14-maelstrom-ui-key-mint-complete.md
+apiVersion: external-secrets.io/v1beta1
+kind: ExternalSecret
+metadata:
+  name: maelstrom-ui-credentials
+  namespace: openviking
+  annotations:
+    argocd.argoproj.io/sync-wave: "-1"
+    description: "Scoped read-only API key for maelstrom (Web Studio UI)"
+spec:
+  refreshInterval: "1h"
+  secretStoreRef:
+    kind: ClusterSecretStore
+    name: onepassword-connect
+  target:
+    name: maelstrom-ui-credentials
+    creationPolicy: Owner
+    template:
+      engineVersion: v2
+      data:
+        maelstrom_ui_key: "{{ .MAELSTROM_UI_KEY }}"
+  data:
+    - secretKey: MAELSTROM_UI_KEY
+      remoteRef:
+        key: openviking
+        property: maelstrom-ui-key
diff --git a/cluster/platform/openviking/ingress-maelstrom.yaml b/cluster/platform/openviking/ingress-maelstrom.yaml
new file mode 100644
index 0000000..fa1d910
--- /dev/null
+++ b/cluster/platform/openviking/ingress-maelstrom.yaml
@@ -0,0 +1,25 @@
+apiVersion: networking.k8s.io/v1
+kind: Ingress
+metadata:
+  name: maelstrom-ui
+  namespace: openviking
+  annotations:
+    cert-manager.io/cluster-issuer: letsencrypt-prod
+    nginx.ingress.kubernetes.io/ssl-redirect: "true"
+spec:
+  ingressClassName: nginx
+  tls:
+    - hosts:
+        - maelstrom.local.mk-labs.cloud
+      secretName: maelstrom-ui-tls
+  rules:
+    - host: maelstrom.local.mk-labs.cloud
+      http:
+        paths:
+          - path: /
+            pathType: Prefix
+            backend:
+              service:
+                name: maelstrom-ui
+                port:
+                  number: 80
diff --git a/cluster/platform/openviking/maelstrom-ui/Dockerfile b/cluster/platform/openviking/maelstrom-ui/Dockerfile
new file mode 100644
index 0000000..4087591
--- /dev/null
+++ b/cluster/platform/openviking/maelstrom-ui/Dockerfile
@@ -0,0 +1,25 @@
+# maelstrom-ui — OpenViking Web Studio static frontend
+# Built per finalized plan: inbox/ryan/2026-08-14-maelstrom-ui-deployment-plan.md (Option B)
+#
+# Source: volcengine/openviking upstream, subdirectory web-studio/, pinned to
+# commit 3cd1d4e9acdfcc2567fd78da95339c3b18936c1c (2026-08-14).
+# NOT vendored into this repo (GitOps manifests stay app-source-free) — the
+# build context is the upstream web-studio/ directory checked out at that
+# commit. Image built + pushed manually for this deployment; see
+# system/inbox/agents/peter-parker/ for the build log if promoted to CI.
+#
+# Stage 1: build the SPA
+FROM node:22-alpine AS build
+WORKDIR /app
+COPY web-studio/package.json web-studio/package-lock.json* web-studio/pnpm-lock.yaml* ./
+RUN if [ -f pnpm-lock.yaml ]; then corepack enable && corepack prepare pnpm@latest --activate && pnpm install --no-frozen-lockfile && pnpm approve-builds --all || true; \
+    else npm ci; fi
+COPY web-studio/ .
+RUN if [ -f pnpm-lock.yaml ]; then pnpm run build; else npm run build; fi
+
+# Stage 2: serve with nginx, proxying /api/, /health, /ready to the openviking Service.
+# /bot/ is deliberately NOT proxied (bot.enabled: false, defense-in-depth per plan §2).
+FROM nginx:alpine
+COPY --from=build /app/dist /usr/share/nginx/html
+COPY nginx.conf /etc/nginx/conf.d/default.conf
+EXPOSE 80
diff --git a/cluster/platform/openviking/maelstrom-ui/nginx.conf b/cluster/platform/openviking/maelstrom-ui/nginx.conf
new file mode 100644
index 0000000..66b815f
--- /dev/null
+++ b/cluster/platform/openviking/maelstrom-ui/nginx.conf
@@ -0,0 +1,34 @@
+# maelstrom-ui nginx config
+# Per plan §2: proxy /api/, /health, /ready to the openviking Service.
+# /bot/ is deliberately NOT proxied — bot stays disabled (scope decision #3);
+# any Web Studio call to /bot/v1/* 404s at this layer instead of reaching a disabled backend.
+server {
+    listen 80;
+    server_name _;
+
+    location /api/ {
+        proxy_pass http://openviking.openviking.svc.cluster.local:1933/api/;
+        proxy_set_header Host $host;
+        proxy_set_header X-Real-IP $remote_addr;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        proxy_set_header X-Forwarded-Proto $scheme;
+    }
+
+    location /health {
+        proxy_pass http://openviking.openviking.svc.cluster.local:1933/health;
+        proxy_set_header Host $host;
+    }
+
+    location /ready {
+        proxy_pass http://openviking.openviking.svc.cluster.local:1933/ready;
+        proxy_set_header Host $host;
+    }
+
+    # bot stays disabled — no proxy for /bot/, static 404 by default nginx behavior.
+
+    location / {
+        root /usr/share/nginx/html;
+        index index.html;
+        try_files $uri $uri/ /index.html;
+    }
+}