Add homeassistant skill in unpacked format

- Add complete homeassistant skill source to skills/ directory
- Includes all scripts, references, and automation templates
- Matches format of other skills in repository

skills/homeassistant/scripts/list_entities.py

@@ -0,0 +1,88 @@
+#!/usr/bin/env python3
+"""
+List all Home Assistant entities and their states
+
+This script queries Home Assistant and displays all entities with their current states.
+Can filter by domain (e.g., light, switch, sensor) and format output.
+
+Usage:
+    # List all entities
+    python3 list_entities.py --url http://homeassistant.local:8123 --token YOUR_TOKEN
+
+    # List only lights
+    python3 list_entities.py --url http://homeassistant.local:8123 --token YOUR_TOKEN --domain light
+
+    # Output as JSON
+    python3 list_entities.py --url http://homeassistant.local:8123 --token YOUR_TOKEN --format json
+
+Environment variables:
+    HA_URL: Home Assistant URL
+    HA_TOKEN: Long-lived access token
+"""
+
+import argparse
+import json
+import os
+import sys
+import urllib.request
+
+
+def get_entities(url: str, token: str):
+    """Get all entity states from Home Assistant."""
+    api_url = f"{url.rstrip('/')}/api/states"
+    headers = {
+        'Authorization': f'Bearer {token}',
+        'Content-Type': 'application/json'
+    }
+
+    req = urllib.request.Request(api_url, headers=headers)
+
+    try:
+        with urllib.request.urlopen(req) as response:
+            return json.loads(response.read().decode('utf-8'))
+    except Exception as e:
+        print(f"Error: {e}", file=sys.stderr)
+        sys.exit(1)
+
+
+def main():
+    parser = argparse.ArgumentParser(description='List Home Assistant entities')
+    parser.add_argument('--url', help='Home Assistant URL',
+                       default=os.getenv('HA_URL'))
+    parser.add_argument('--token', help='Long-lived access token',
+                       default=os.getenv('HA_TOKEN'))
+    parser.add_argument('--domain', help='Filter by domain (e.g., light, switch, sensor)')
+    parser.add_argument('--format', choices=['table', 'json', 'list'],
+                       default='table', help='Output format')
+
+    args = parser.parse_args()
+
+    if not args.url or not args.token:
+        print("Error: URL and token are required", file=sys.stderr)
+        sys.exit(1)
+
+    entities = get_entities(args.url, args.token)
+
+    # Filter by domain if specified
+    if args.domain:
+        entities = [e for e in entities if e['entity_id'].startswith(f"{args.domain}.")]
+
+    if args.format == 'json':
+        print(json.dumps(entities, indent=2))
+    elif args.format == 'list':
+        for entity in entities:
+            print(entity['entity_id'])
+    else:  # table format
+        print(f"{'Entity ID':<40} {'State':<20} {'Last Changed':<20}")
+        print("-" * 80)
+        for entity in entities:
+            entity_id = entity['entity_id']
+            state = entity['state']
+            last_changed = entity.get('last_changed', 'N/A')[:19]  # Truncate timestamp
+            print(f"{entity_id:<40} {state:<20} {last_changed:<20}")
+
+        print(f"\nTotal: {len(entities)} entities")
+
+
+if __name__ == '__main__':
+    main()