diff --git a/scripts/k3s-join.sh b/scripts/k3s-join.sh
new file mode 100755
index 0000000..d34806e
--- /dev/null
+++ b/scripts/k3s-join.sh
@@ -0,0 +1,32 @@
+#!/bin/bash
+# Joins the remaining 19 nodes to the k3s cluster (planck002 = first server).
+# Usage: K3S_TOKEN=<node-token> ./scripts/k3s-join.sh
+set -euo pipefail
+
+SERVER_URL="https://192.168.0.110:6443"   # planck002
+SERVERS=(planck003 planck004)
+AGENTS=(planck001 planck005 planck006 planck007 planck008 planck009 planck010
+        planck011 planck012 planck013 planck014 planck015 planck016
+        planck017 planck018 planck019 planck020)
+
+[ -n "${K3S_TOKEN:-}" ] || { echo "K3S_TOKEN env required"; exit 1; }
+export K3S_TOKEN
+
+join_server() {
+    ssh -o BatchMode=yes adamcarr@$1.local \
+        "curl -sfL https://get.k3s.io | sudo K3S_TOKEN='$K3S_TOKEN' sh -s - server --server '$SERVER_URL' --write-kubeconfig-mode 644" \
+        2>&1 | grep -viE "rptl.io|newuser" | tail -1
+    echo "joined server: $1"
+}
+
+join_agent() {
+    ssh -o BatchMode=yes adamcarr@$1.local \
+        "curl -sfL https://get.k3s.io | sudo K3S_URL='$SERVER_URL' K3S_TOKEN='$K3S_TOKEN' sh -s -" \
+        2>&1 | grep -viE "rptl.io|newuser" | tail -1
+    echo "joined agent: $1"
+}
+
+for s in "${SERVERS[@]}"; do join_server "$s"; done
+for a in "${AGENTS[@]}"; do join_agent "$a" & done
+wait
+echo "all join commands issued"