diff --git a/scripts/monitoring/docker-prune-watchdog.sh b/scripts/monitoring/docker-prune-watchdog.sh
new file mode 100644
index 0000000..9849704
--- /dev/null
+++ b/scripts/monitoring/docker-prune-watchdog.sh
@@ -0,0 +1,202 @@
+#!/bin/bash
+
+################################################################################
+# Docker System Prune Watchdog
+# 
+# Monitors disk usage and automatically runs 'docker system prune -f' when
+# disk exceeds 85%. Sends notifications to Microsoft Teams via webhook.
+# Logs to RAM (tmpfs) to avoid disk space consumption.
+################################################################################
+
+set -euo pipefail
+
+# ============================================================================
+# CONFIGURATION
+# ============================================================================
+
+# Use environment variables (sourced from config), with defaults as fallback
+DISK_THRESHOLD="${DISK_THRESHOLD:-85}"
+CHECK_INTERVAL="${CHECK_INTERVAL:-60}"
+TEAMS_WEBHOOK_URL="${TEAMS_WEBHOOK_URL:-}"
+NOTIFICATION_MODE="${NOTIFICATION_MODE:-both}"
+
+# Log file (in RAM via tmpfs)
+LOG_DIR="/dev/shm"
+LOG_FILE="${LOG_DIR}/docker-prune-watchdog.log"
+
+# ============================================================================
+# FUNCTIONS
+# ============================================================================
+
+log() {
+    local level="$1"
+    shift
+    local message="$@"
+    local timestamp=$(date '+%Y-%m-%d %H:%M:%S')
+    echo "[${timestamp}] [${level}] ${message}" >> "${LOG_FILE}"
+}
+
+get_disk_usage() {
+    # Returns disk usage percentage for root filesystem
+    df /volume1/docker-root | awk 'NR==2 {print $5}' | sed 's/%//'
+}
+
+send_teams_notification() {
+    local title="$1"
+    local message="$2"
+    local severity="${3:-informational}"  # informational, warning, danger
+    
+    if [ -z "${TEAMS_WEBHOOK_URL}" ]; then
+        log "WARN" "Teams webhook URL not configured, skipping notification"
+        return 1
+    fi
+    
+    # Determine color based on severity
+    local color
+    case "${severity}" in
+        danger)  color="ff0000" ;;      # Red
+        warning) color="ffaa00" ;;      # Orange
+        *)       color="0078d4" ;;      # Blue (Microsoft Teams color)
+    esac
+    
+    # Create JSON payload (simple format)
+    local json_payload="{\"title\":\"${title}\",\"text\":\"${message}\",\"themeColor\":\"${color}\"}"
+    
+    # Send to Teams
+    if curl -s -X POST \
+        -H 'Content-Type: application/json' \
+        -d "${json_payload}" \
+        "${TEAMS_WEBHOOK_URL}" > /dev/null 2>&1; then
+        log "INFO" "Teams notification sent: ${title}"
+        return 0
+    else
+        log "ERROR" "Failed to send Teams notification: ${title}"
+        return 1
+    fi
+}
+
+run_docker_prune() {
+    local disk_usage_before=$1
+    local hostname=$(hostname)
+    
+    log "INFO" "Disk usage at ${disk_usage_before}% (threshold: ${DISK_THRESHOLD}%). Running docker system prune..."
+    
+    local prune_output
+    local prune_exit_code=0
+    
+    # Run docker system prune and capture output
+    prune_output=$(docker system prune -f 2>&1) || prune_exit_code=$?
+    
+    # Get disk usage after prune
+    local disk_usage_after=$(get_disk_usage)
+    local disk_freed=$((disk_usage_before - disk_usage_after))
+    
+    if [ ${prune_exit_code} -eq 0 ]; then
+        log "INFO" "Docker prune completed successfully"
+        log "INFO" "Disk usage: before=${disk_usage_before}%, after=${disk_usage_after}%, freed=${disk_freed}%"
+        log "DEBUG" "Prune output: ${prune_output}"
+        
+        # Send notification based on mode
+        if [[ "${NOTIFICATION_MODE}" == "always" || "${NOTIFICATION_MODE}" == "both" ]]; then
+            local message="Host: ${hostname}\n\nDisk Usage: ${disk_usage_before}% → ${disk_usage_after}% (${disk_freed}% freed)\n\nDocker system prune completed successfully."
+            send_teams_notification \
+                "✅ Docker Prune Executed" \
+                "${message}" \
+                "informational"
+        fi
+        
+        return 0
+    else
+        log "ERROR" "Docker prune failed with exit code ${prune_exit_code}"
+        log "ERROR" "Prune error output: ${prune_output}"
+        
+        # Send error notification
+        if [[ "${NOTIFICATION_MODE}" == "errors_only" || "${NOTIFICATION_MODE}" == "both" ]]; then
+            local message="Host: ${hostname}\n\nDisk Usage Before: ${disk_usage_before}%\n\nError: ${prune_output}"
+            send_teams_notification \
+                "❌ Docker Prune Failed" \
+                "${message}" \
+                "danger"
+        fi
+        
+        return 1
+    fi
+}
+
+show_logs() {
+    if [ -f "${LOG_FILE}" ]; then
+        echo "=== Docker Prune Watchdog Logs ==="
+        tail -100 "${LOG_FILE}"
+    else
+        echo "No logs found at ${LOG_FILE}"
+    fi
+}
+
+show_usage() {
+    cat <<EOF
+Usage: $0 [COMMAND]
+
+Commands:
+    start       Start the watchdog (default)
+    logs        Display recent logs
+    help        Show this message
+
+Configuration:
+    Set environment variables before running:
+    - TEAMS_WEBHOOK_URL: Microsoft Teams webhook URL (required for notifications)
+    - NOTIFICATION_MODE: "always", "errors_only", or "both" (default: both)
+    - DISK_THRESHOLD: Disk usage percentage threshold (default: 85)
+    - CHECK_INTERVAL: Check interval in seconds (default: 60)
+
+Example:
+    export TEAMS_WEBHOOK_URL="https://bryanfamily.webhook.office.com/..."
+    export NOTIFICATION_MODE="both"
+    $0 start
+
+EOF
+}
+
+# ============================================================================
+# MAIN
+# ============================================================================
+
+main() {
+    local command="${1:-start}"
+    
+    case "${command}" in
+        start)
+            # Initialize log file
+            touch "${LOG_FILE}" 2>/dev/null || {
+                echo "ERROR: Cannot write to ${LOG_FILE}. Ensure /dev/shm is writable."
+                exit 1
+            }
+            
+            log "INFO" "Docker Prune Watchdog started"
+            log "INFO" "Configuration: Threshold=${DISK_THRESHOLD}%, Interval=${CHECK_INTERVAL}s, Mode=${NOTIFICATION_MODE}"
+            
+            # Main watchdog loop
+            while true; do
+                disk_usage=$(get_disk_usage)
+                
+                if [ "${disk_usage}" -gt "${DISK_THRESHOLD}" ]; then
+                    run_docker_prune "${disk_usage}"
+                fi
+                
+                sleep "${CHECK_INTERVAL}"
+            done
+            ;;
+        logs)
+            show_logs
+            ;;
+        help|--help|-h)
+            show_usage
+            ;;
+        *)
+            echo "Unknown command: ${command}"
+            show_usage
+            exit 1
+            ;;
+    esac
+}
+
+main "$@"