Enhance CodeGuard plugin structure and documentation

- Updated .gitattributes to improve language detection for markdown files and added documentation settings for the Claude plugin.
- Modified .gitignore to include cache files for the Claude plugin and ensure proper exclusion of agent files.
- Introduced new marketplace.json and plugin.json files for the Claude Code plugin, detailing plugin metadata and security rules.
- Added comprehensive documentation for the CodeGuard Claude Code Plugin, including installation instructions and usage guidelines.
- Created multiple security rules covering various aspects such as authentication, API security, data protection, and session management.
- Implemented a script to prepare the CodeGuard plugin for distribution, ensuring all necessary files are in place.

This commit lays the groundwork for a robust security framework within the Claude Code environment.

Author: santosomar

.claude-plugin/marketplace.json

@@ -0,0 +1,23 @@
+{
+  "name": "project-codeguard",
+  "description": "Official Project CodeGuard plugins for secure AI-assisted coding",
+  "owner": {
+    "name": "Project CodeGuard",
+    "url": "https://project-codeguard.org",
+    "email": "contact@project-codeguard.org"
+  },
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/project-codeguard/rules.git"
+  },
+  "plugins": [
+    {
+      "name": "codeguard-security",
+      "source": ".",
+      "description": "Comprehensive security rules for AI coding agents",
+      "version": "1.0.0",
+      "tags": ["security", "code-review", "vulnerability-prevention"]
+    }
+  ]
+}
+

.claude-plugin/plugin.json

@@ -0,0 +1,17 @@
+{
+  "name": "codeguard-security",
+  "description": "Security code review skill based on Project CodeGuard's comprehensive security rules. Helps AI coding agents write secure code and prevent common vulnerabilities.",
+  "version": "1.0.0",
+  "author": {
+    "name": "Project CodeGuard",
+    "url": "https://project-codeguard.org"
+  },
+  "license": "CC-BY-4.0 (rules), Apache-2.0 (tools)",
+  "homepage": "https://github.com/project-codeguard/rules",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/project-codeguard/rules.git"
+  },
+  "keywords": ["security", "secure-coding", "vulnerability-prevention", "code-review", "appsec"]
+}
+

.gitattributes

@@ -7,4 +7,8 @@
 # Explicitly include desired items for releases
 ide_rules/ -export-ignore
 ide_rules/** -export-ignore
-README.md -export-ignore 
+README.md -export-ignore
+
+# Linguist language detection
+*.md linguist-detectable=true
+.claude-plugin/* linguist-documentation=true

.gitignore

@@ -158,4 +158,7 @@ Temporary Items
 
 # Coding Agents
 CLAUDE.md 
-AGENTS.md
+AGENTS.md
+
+# Claude Code Plugin
+.claude-plugin/.cache