Add command relationships, essential commands, and validation script

- Introduced `command-relationships.json` to define internal calls, next steps, and prerequisites for various workflows.
- Created `essential-commands.json` to document key commands, their descriptions, arguments, and usage scenarios.
- Added `validate-help.py` script to check for the existence of source files referenced in command definitions, ensuring all necessary files are present.

validate-help.py

@@ -0,0 +1,60 @@
+#!/usr/bin/env python3
+import os
+import json
+import sys
+
+# Read command.json
+command_json_path = os.path.expandvars('D:\\Claude_dms3\\.claude\\skills\\ccw-help\\command.json')
+
+try:
+    with open(command_json_path, 'r', encoding='utf-8') as f:
+        data = json.load(f)
+except Exception as e:
+    print(f"Error reading command.json: {e}")
+    sys.exit(1)
+
+base_dir = os.path.expandvars('D:\\Claude_dms3\\.claude\\skills\\ccw-help')
+commands_base = os.path.expandvars('D:\\Claude_dms3\\.claude\\commands')
+
+# Check commands
+missing = []
+existing = []
+
+print("Checking command source files...")
+print("=" * 70)
+
+for cmd in data.get('commands', []):
+    if cmd.get('source'):
+        # Resolve path from ccw-help directory
+        full_path = os.path.normpath(os.path.join(base_dir, cmd['source']))
+        exists = os.path.isfile(full_path)
+
+        if exists:
+            existing.append((cmd['command'], full_path))
+        else:
+            missing.append((cmd['command'], cmd['source'], full_path))
+
+# Print missing files
+if missing:
+    print(f"\n❌ MISSING SOURCE FILES ({len(missing)}):")
+    print("-" * 70)
+    for cmd, source, resolved in missing[:20]:  # Show first 20
+        print(f"{cmd}")
+        print(f"  Source: {source}")
+        print(f"  Expected: {resolved}")
+else:
+    print(f"\n✅ All source files exist!")
+
+print(f"\n" + "=" * 70)
+print(f"SUMMARY:")
+print(f"  Total commands: {len(data.get('commands', []))}")
+print(f"  Source files exist: {len(existing)}")
+print(f"  Source files missing: {len(missing)}")
+print("=" * 70)
+
+# List commands without source
+no_source = [cmd['command'] for cmd in data.get('commands', []) if not cmd.get('source')]
+if no_source:
+    print(f"\n⚠️  Commands without 'source' field ({len(no_source)}):")
+    for cmd_name in no_source[:10]:
+        print(f"  - {cmd_name}")