docs: Archive old xzaviar presence script with restoration notes

system/dynamic/disabled/xzaviar_presence.md

@@ -39,3 +39,47 @@ description: Xzaviar VPN reachability monitor - auto-updated via cron every 5 mi
 - 3 consecutive failed pings
 
 **Note:** When Xzaviar goes offline, notify Ani immediately. He may need VPN troubleshooting or just went to bed. Check before assuming system failure.
+
+---
+
+## Archived Implementation (2026-03-27)
+
+**Status:** Converted to `vpn-health` skill (on-demand instead of cron)
+
+**Original Script:** `/home/ani/bin/update-xzaviar-presence` (deleted)
+
+```bash
+#!/bin/bash
+# update-xzaviar-presence: Xzaviar reachability monitor
+# Cron: */5 * * * * (every 5 minutes)
+# Target: 10.10.10.174 (Xzaviar's device, not VPN gateway)
+
+set -e
+
+MEMORY_DIR="/home/ani/.letta/agents/agent-e2b683bf-5b3e-4e0c-ac62-2bbb47ea8351/memory"
+PRESENCE_FILE="$MEMORY_DIR/system/dynamic/xzaviar_presence.md"
+TARGET_IP="10.10.10.174"
+
+# Ping test
+if ping -c 1 -W 3 "$TARGET_IP" >/dev/null 2>&1; then
+    STATUS="ONLINE"
+    LATENCY=$(ping -c 1 "$TARGET_IP" | grep -o 'time=[0-9.]*' | cut -d= -f2)
+else
+    STATUS="OFFLINE"
+    LATENCY="N/A"
+fi
+
+# Update markdown with history tracking
+# ... (generated dynamic markdown file)
+
+/home/ani/bin/daemon-git-commit \
+    "system/dynamic/xzaviar_presence.md" \
+    "auto: xzaviar presence update $(date '+%H:%M')"
+```
+
+**Why archived:**
+- Target IP (10.10.10.174) was unknown device, not VPN gateway
+- Continuous monitoring unnecessary for on-demand need
+- Converted to `vpn-health` skill targeting 10.10.10.2 (actual VPN gateway)
+
+**Restoration:** Copy script to `/home/ani/bin/`, add cron entry, move this file back to `system/dynamic/`