Add prominent archive notices and documentation

Co-authored-by: pacnpal <183241239+pacnpal@users.noreply.github.com>

ARCHIVE_NOTICE.md

@@ -0,0 +1,105 @@
+# Archive Notice
+
+## Repository Status
+
+**This repository has been archived and is now read-only.**
+
+- **Archive Date**: January 31, 2026
+- **Last Active Maintenance**: 2025
+- **Status**: No longer maintained or supported
+
+## Why Was This Repository Archived?
+
+This project has been archived for the following reasons:
+
+1. **Official Alternatives Available**: Anthropic now provides official integrations and tools for Claude AI that are more robust and better maintained.
+
+2. **Better Solutions Exist**: The AI code review ecosystem has matured significantly, with enterprise-grade solutions available that offer more features and better support.
+
+3. **Maintenance Burden**: As a community project, maintaining compatibility with rapidly evolving AI APIs and GitHub Actions became unsustainable.
+
+## What Does "Archived" Mean?
+
+An archived repository is read-only, which means:
+
+- ✅ The code remains accessible for reference and historical purposes
+- ✅ You can still clone and fork the repository
+- ✅ Existing workflows using this action will continue to work (until API changes break them)
+- ❌ No new issues can be opened
+- ❌ No new pull requests can be submitted
+- ❌ No updates or bug fixes will be provided
+- ❌ No support or maintenance will be available
+
+## Recommended Alternatives
+
+We recommend migrating to one of these alternatives:
+
+### 1. **Anthropic API Direct Integration**
+- Use the official [Anthropic API](https://docs.anthropic.com/) with the latest Claude models
+- Full control and customization
+- Best for teams with development resources
+
+### 2. **GitHub Copilot**
+- Native GitHub integration
+- Real-time code assistance
+- Note: Uses primarily OpenAI models, not Claude
+
+### 3. **Third-Party AI Code Review Tools**
+- Many SaaS solutions now offer AI-powered code review
+- Check the GitHub Marketplace for current options
+- Look for solutions with active maintenance and support
+
+### 4. **Claude for Workspace**
+- Enterprise-level integration
+- Designed for team workflows
+- Contact Anthropic for availability
+
+## Migration Guide
+
+If you're currently using this action and need to migrate:
+
+1. **Assess Your Needs**
+   - Determine what features you rely on
+   - Evaluate whether you need automated reviews or manual AI assistance
+
+2. **Choose an Alternative**
+   - Research current solutions (see recommendations above)
+   - Consider your budget and team size
+   - Evaluate security and privacy requirements
+
+3. **Update Your Workflows**
+   - Remove or comment out this action from your `.github/workflows/` files
+   - Replace with your chosen alternative
+   - Test thoroughly in a non-production environment first
+
+4. **Remove the Action**
+   - Once migrated, remove the workflow file or action reference
+   - Clean up any related secrets (keep them if migrating to Anthropic API)
+
+## For Historical Reference
+
+This repository will remain available indefinitely for:
+- Historical reference
+- Learning from the implementation
+- Forking for custom solutions
+- Understanding the deprecated API patterns
+
+## Contact
+
+For questions about this archive:
+- **Repository Owner**: PacNPal
+- **Archive Reason**: Project deprecated in favor of official solutions
+- **Historical Issues**: Available in the Issues tab (read-only)
+
+## License
+
+This project remains under the MIT License. You may fork and modify it for your own use, but please note:
+- No support will be provided
+- APIs may have changed since archival
+- Security vulnerabilities will not be patched
+
+---
+
+**Thank you to all contributors and users who made this project successful during its active development!**
+
+*Last Updated: January 31, 2026*

README.md

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 # Claude Code Review Action
 
+![Archived](https://img.shields.io/badge/status-ARCHIVED-red)
 ![GitHub](https://img.shields.io/github/license/pacnpal/claude-code-review)
 ![GitHub Actions Workflow Status](https://img.shields.io/badge/actions-passing-brightgreen)
 ![Claude](https://img.shields.io/badge/Claude-Sonnet%204.5-blue)
 ![Node](https://img.shields.io/badge/node-20-green)
 
-A GitHub Action that performs automated code reviews using Claude Sonnet 4.5, Anthropic's latest AI model for code analysis.
+## 🗄️ ARCHIVED - NO LONGER MAINTAINED
+
+> **⚠️ IMPORTANT: This repository is archived and read-only. No new issues, pull requests, or updates will be accepted.**
+
+**This project is deprecated and archived.** Anthropic now offers official Claude integrations and there are improved alternatives for AI-powered code review. We recommend exploring these official solutions:
+
+- **Anthropic API**: Use the official Anthropic API with the latest Claude models
+- **Claude for Workspace**: Enterprise integration for team workflows
+- **GitHub Copilot**: AI-powered code assistance (note: primarily uses OpenAI models)
+- **Other AI Code Review Tools**: Various third-party integrations with modern AI models
+
+This repository will remain available for historical reference, but is no longer actively maintained.
+
+---
+
+A GitHub Action that performs automated code reviews using Claude Sonnet 4.5, Anthropic's AI model for code analysis.
 
 ## Why Use Claude Code Review?
 

action.yml

@@ -1,6 +1,6 @@
 # action.yml
 name: 'Claude Code Review'
-description: 'Automated code review using Claude'
+description: '[ARCHIVED] Automated code review using Claude - No longer maintained'
 inputs:
   github-token:
     description: 'GitHub token'

package.json

@@ -1,7 +1,7 @@
 {
   "name": "claude-code-review-action",
   "version": "1.0.0",
-  "description": "GitHub Action for code review using Claude",
+  "description": "[ARCHIVED] GitHub Action for code review using Claude - No longer maintained",
   "main": "action.js",
   "scripts": {
     "test": "jest",