diff --git a/cdssync/AGENTS.md b/cdssync/AGENTS.md
index fd35388..41c6100 100644
--- a/cdssync/AGENTS.md
+++ b/cdssync/AGENTS.md
@@ -32,6 +32,15 @@ For migration test datasets in this workspace, follow this process by default:
   - `acl` installed for `setfacl` and `getfacl`
   - `attr` installed for `setfattr` and `getfattr`
 
+## Monitoring Helper
+
+- Use `/home/aw/code/cds/cdssync/monitor_mtdi_galaxy.sh` when the user wants CPU and memory logging for `mtdi-daemon` and `galaxy-migrate`.
+- The script accepts:
+  - `INTERVAL_SECONDS`, default `10`
+  - `LOG_FILE`, default `/root/monitor_mtdi_galaxy.log`
+- A common remote run pattern is:
+  - `nohup /root/monitor_mtdi_galaxy.sh 10 /root/monitor_mtdi_galaxy.log >/dev/null 2>&1 </dev/null &`
+
 ## Copy Rules
 
 - Use `rsync -aHAX` by default when copying the dataset to another machine.
diff --git a/cdssync/monitor_mtdi_galaxy.sh b/cdssync/monitor_mtdi_galaxy.sh
new file mode 100644
index 0000000..139a186
--- /dev/null
+++ b/cdssync/monitor_mtdi_galaxy.sh
@@ -0,0 +1,26 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+INTERVAL_SECONDS=${1:-10}
+LOG_FILE=${2:-/root/monitor_mtdi_galaxy.log}
+
+if ! [[ "$INTERVAL_SECONDS" =~ ^[0-9]+$ ]] || (( INTERVAL_SECONDS <= 0 )); then
+  echo "Usage: $0 [INTERVAL_SECONDS] [LOG_FILE]" >&2
+  exit 1
+fi
+
+echo "# monitor start $(date '+%Y-%m-%d %H:%M:%S') interval=${INTERVAL_SECONDS}s" >>"$LOG_FILE"
+
+while true; do
+  {
+    echo "=== $(date '+%Y-%m-%d %H:%M:%S') ==="
+    ps -eo pid,ppid,comm,args,%cpu,%mem,rss,vsz --sort=-%cpu | \
+      awk '/mtdi-daemon|galaxy-migrate/ && $0 !~ /awk/ {
+        printf "pid=%s ppid=%s comm=%s cpu=%s mem=%s rss_kb=%s vsz_kb=%s cmd=%s\n",
+          $1, $2, $3, $5, $6, $7, $8, substr($0, index($0, $4))
+      }'
+    echo
+  } >>"$LOG_FILE"
+  sleep "$INTERVAL_SECONDS"
+done