spark: add verified system-info.sh script that outputs JSON metrics

wizard-work/spark/system-info.sh

@@ -0,0 +1,66 @@
+#!/bin/bash
+# System info reporter - outputs JSON with verifiable data
+set -euo pipefail
+
+# Get hostname
+HOSTNAME=$(hostname 2>/dev/null || echo "unknown")
+
+# Get kernel version
+KERNEL=$(uname -r 2>/dev/null || echo "unknown")
+
+# Get OS info (try multiple methods)
+if [[ -f /etc/os-release ]]; then
+    OS_NAME=$(grep '^NAME=' /etc/os-release 2>/dev/null | cut -d'=' -f2 | tr -d '"' || echo "unknown")
+    OS_VERSION=$(grep '^VERSION=' /etc/os-release 2>/dev/null | cut -d'=' -f2 | tr -d '"' || echo "unknown")
+else
+    OS_NAME="unknown"
+    OS_VERSION="unknown"
+fi
+
+# Get disk usage for root filesystem
+DISK_TOTAL=$(df -h / 2>/dev/null | awk 'NR==2 {print $2}' || echo "0")
+DISK_USED=$(df -h / 2>/dev/null | awk 'NR==2 {print $3}' || echo "0")
+DISK_AVAIL=$(df -h / 2>/dev/null | awk 'NR==2 {print $4}' || echo "0")
+DISK_PERCENT=$(df -h / 2>/dev/null | awk 'NR==2 {print $5}' | tr -d '%' || echo "0")
+
+# Get memory info
+if [[ -f /proc/meminfo ]]; then
+    MEM_TOTAL_KB=$(awk '/MemTotal/ {print $2}' /proc/meminfo 2>/dev/null || echo "0")
+    MEM_FREE_KB=$(awk '/MemFree/ {print $2}' /proc/meminfo 2>/dev/null || echo "0")
+    MEM_TOTAL_GB=$(echo "scale=2; $MEM_TOTAL_KB/1048576" | bc 2>/dev/null || echo "0")
+else
+    MEM_TOTAL_GB=0
+fi
+
+# Get current user
+CURRENT_USER=$(whoami 2>/dev/null || echo "unknown")
+
+# Get current working directory
+CWD=$(pwd 2>/dev/null || echo "unknown")
+
+# Count processes
+PROCESS_COUNT=$(ps aux 2>/dev/null | wc -l || echo "0")
+
+# Output JSON
+cat <<EOF
+{
+  "hostname": "$HOSTNAME",
+  "kernel": "$KERNEL",
+  "os": {
+    "name": "$OS_NAME",
+    "version": "$OS_VERSION"
+  },
+  "disk": {
+    "total": "$DISK_TOTAL",
+    "used": "$DISK_USED",
+    "available": "$DISK_AVAIL",
+    "percent_used": $DISK_PERCENT
+  },
+  "memory": {
+    "total_gb": $MEM_TOTAL_GB
+  },
+  "user": "$CURRENT_USER",
+  "working_directory": "$CWD",
+  "process_count": $PROCESS_COUNT
+}
+EOF