Add comprehensive skills, agents, commands collection

- Added 44 external skills from obra/superpowers, ui-ux-pro-max-skill, claude-codex-settings
- Added 8 autonomous agents (commit-creator, pr-creator, pr-reviewer, etc.)
- Added 23 slash commands for Git/GitHub, setup, and plugin development
- Added hooks for code formatting, notifications, and validation
- Added MCP configurations for Azure, GCloud, Supabase, MongoDB, etc.
- Added awesome-openclaw-skills registry (3,002 skills referenced)
- Updated comprehensive README with full documentation

Sources:
- github.com/obra/superpowers (14 skills)
- github.com/nextlevelbuilder/ui-ux-pro-max-skill (1 skill)
- github.com/fcakyon/claude-codex-settings (29 skills, 8 agents, 23 commands)
- github.com/VoltAgent/awesome-openclaw-skills (registry)
- skills.sh (reference)
- buildwithclaude.com (reference)

hooks/claude-codex-settings/scripts/sync_marketplace_to_plugins.py

@@ -0,0 +1,83 @@
+#!/usr/bin/env python3
+"""Sync marketplace.json plugin entries to individual plugin.json files."""
+
+import json
+import sys
+from pathlib import Path
+
+
+def get_edited_file_path():
+    """Extract file path from hook input."""
+    try:
+        input_data = json.load(sys.stdin)
+        return input_data.get("tool_input", {}).get("file_path", "")
+    except (json.JSONDecodeError, KeyError):
+        return ""
+
+
+def sync_marketplace_to_plugins():
+    """Sync marketplace.json entries to individual plugin.json files."""
+    edited_path = get_edited_file_path()
+
+    # Only trigger for marketplace.json edits
+    if not edited_path.endswith("marketplace.json"):
+        return 0
+
+    marketplace_path = Path(edited_path)
+    if not marketplace_path.exists():
+        return 0
+
+    try:
+        marketplace = json.loads(marketplace_path.read_text())
+    except (json.JSONDecodeError, OSError) as e:
+        print(f"❌ Failed to read marketplace.json: {e}", file=sys.stderr)
+        return 2
+
+    plugins = marketplace.get("plugins", [])
+    if not plugins:
+        return 0
+
+    marketplace_dir = marketplace_path.parent.parent  # Go up from .claude-plugin/
+    synced = []
+
+    for plugin in plugins:
+        source = plugin.get("source")
+        if not source:
+            continue
+
+        # Resolve plugin directory relative to marketplace root
+        plugin_dir = (marketplace_dir / source).resolve()
+        plugin_json_dir = plugin_dir / ".claude-plugin"
+        plugin_json_path = plugin_json_dir / "plugin.json"
+
+        # Build plugin.json content from marketplace entry
+        plugin_data = {"name": plugin.get("name", "")}
+
+        # Add optional fields if present in marketplace
+        for field in ["version", "description", "author", "homepage", "repository", "license"]:
+            if field in plugin:
+                plugin_data[field] = plugin[field]
+
+        # Create directory if needed
+        plugin_json_dir.mkdir(parents=True, exist_ok=True)
+
+        # Check if update needed
+        current_data = {}
+        if plugin_json_path.exists():
+            try:
+                current_data = json.loads(plugin_json_path.read_text())
+            except json.JSONDecodeError:
+                pass
+
+        if current_data != plugin_data:
+            plugin_json_path.write_text(json.dumps(plugin_data, indent=2) + "\n")
+            synced.append(plugin.get("name", source))
+
+    if synced:
+        print(f"✓ Synced {len(synced)} plugin manifest(s): {', '.join(synced)}")
+
+    return 0
+
+
+if __name__ == "__main__":
+    sys.exit(sync_marketplace_to_plugins())