diff --git a/apps/github-runner/github-runner.yaml b/apps/github-runner/github-runner.yaml
index fc08fad..aa3ca00 100644
--- a/apps/github-runner/github-runner.yaml
+++ b/apps/github-runner/github-runner.yaml
@@ -212,3 +212,93 @@ spec:
       # Restart policy: Always — the Deployment controller handles
       # re-registration after each ephemeral job completes.
       restartPolicy: Always
+---
+# Shared.Pos repo-scoped Linux runner. Added 2026-05-20 to unstick the
+# FlowerCore.Shared.Pos "Build, Test & Publish" workflow, which had been
+# queued indefinitely after the Sprint 26 Mac POS Phase 1/2 PRs merged
+# (no fc-build-linux runner was registered to Shared.Pos — GitHub user
+# accounts have only repo-scoped runners). First concrete instance of the
+# Sprint 29 Cx-1 Linux-runner-fleet pattern; the full per-repo fleet is
+# codified by that lane. emptyDir nuget cache (no RWO PVC) so it shares no
+# volume with the Common runner and needs no node pin.
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: github-runner-sharedpos
+  namespace: github-runner
+  labels:
+    app.kubernetes.io/name: github-runner-sharedpos
+    app.kubernetes.io/component: runner
+    app.kubernetes.io/part-of: flowercore
+    app.kubernetes.io/managed-by: argocd
+    flowercore.io/created-by: argocd
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app.kubernetes.io/name: github-runner-sharedpos
+  strategy:
+    type: Recreate
+  template:
+    metadata:
+      labels:
+        app.kubernetes.io/name: github-runner-sharedpos
+        app.kubernetes.io/component: runner
+        app.kubernetes.io/part-of: flowercore
+        flowercore.io/created-by: argocd
+    spec:
+      serviceAccountName: github-runner
+      securityContext:
+        runAsNonRoot: true
+        runAsUser: 1001
+        runAsGroup: 1001
+        fsGroup: 1001
+      containers:
+        - name: runner
+          image: myoung34/github-runner:latest
+          imagePullPolicy: Always
+          env:
+            - name: REPO_URL
+              value: "https://github.com/astoltz/FlowerCore.Shared.Pos"
+            - name: RUNNER_NAME_PREFIX
+              value: "rke2-linux-sharedpos"
+            - name: RUNNER_WORKDIR
+              value: "/tmp/runner/work"
+            - name: EPHEMERAL
+              value: "true"
+            - name: LABELS
+              value: "self-hosted,linux,fc-build-linux"
+            - name: ACCESS_TOKEN
+              valueFrom:
+                secretKeyRef:
+                  name: github-runner-token
+                  key: credential
+            - name: RUN_AS_ROOT
+              value: "false"
+          resources:
+            requests:
+              cpu: "500m"
+              memory: "1Gi"
+            limits:
+              cpu: "2000m"
+              memory: "4Gi"
+          volumeMounts:
+            - name: nuget-cache
+              mountPath: /home/runner/.nuget/packages
+            - name: tmp
+              mountPath: /tmp
+          livenessProbe:
+            exec:
+              command:
+                - /bin/sh
+                - -c
+                - "pgrep -f Runner.Listener > /dev/null"
+            initialDelaySeconds: 30
+            periodSeconds: 30
+            failureThreshold: 3
+      volumes:
+        - name: nuget-cache
+          emptyDir: {}
+        - name: tmp
+          emptyDir: {}
+      restartPolicy: Always