docs: enhance README with comprehensive manifest contribution guide

- Add detailed Data Structure section explaining manifest organization
- Include manifest file structure examples and validation guidelines
- Add translation examples for multilingual support
- Enhance feature list with Search & Discovery, Open Source Rankings, AI Coding Landscape, and Curated Collections
- Update language support from 2 to 4 languages (English, German, Simplified Chinese, Korean)
- Improve project structure descriptions with more context
- Add reference to CONTRIBUTING.md for detailed guidelines

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: ericyangpan

README.md

@@ -16,18 +16,105 @@ AI Coding Stack is a comprehensive directory and community-maintained metadata r
 
 ## Features
 
-- **Comprehensive Directory**: Browse and discover AI coding tools across multiple categories (IDEs, CLIs, models, and providers)
+- **Comprehensive Directory**: Browse and discover AI coding tools across multiple categories (IDEs, CLIs, Extensions, Models, Providers, and Vendors)
 - **Smart Comparison**: Compare tools side-by-side with detailed specifications and pricing
+- **Search & Discovery**: Powerful search functionality to find the right tools for your needs
+- **Open Source Rankings**: Track and compare GitHub stars and community engagement
+- **AI Coding Landscape**: Visual overview of the entire AI coding ecosystem
+- **Curated Collections**: Hand-picked tool collections for specific use cases
 - **Community-Driven**: Open-source metadata maintained by the developer community
 - **Always Updated**: Latest version tracking and up-to-date information
-- **Multilingual**: Support for English and Simplified Chinese (more coming soon)
+- **Multilingual**: Support for English, German, Simplified Chinese, and Korean (more coming soon)
+
+## Data Structure
+
+All metadata for AI coding tools is organized in JSON manifest files within the `manifests/` directory. Each tool, model, or platform has its own manifest file following a structured schema.
+
+### Adding or Updating Metadata
+
+To add a new tool or update existing information:
+
+1. **Find the right category**: Locate the appropriate directory in `manifests/`
+2. **Add or update a JSON file**: Create a new manifest file or edit an existing one
+3. **Follow the schema**: Each category has a JSON schema for validation
+4. **Submit a PR**: Open a pull request with your changes
+
+### Manifest Categories
+
+All metadata is stored as JSON files in the `manifests/` directory:
+
+- **IDEs** (`manifests/ides/`) - AI-powered integrated development environments
+  - Example: Cursor, Windsurf, VS Code with AI features
+- **CLIs** (`manifests/clis/`) - Command-line AI coding assistants
+  - Example: Claude Code CLI, Codex, GitHub Copilot CLI
+- **Extensions** (`manifests/extensions/`) - AI code assistant plugins and extensions
+  - Example: GitHub Copilot, Cline, Continue, Roo Code
+- **Models** (`manifests/models/`) - Large language models for coding
+  - Example: GPT-4, Claude Opus, DeepSeek V3, Qwen3 Coder
+- **Providers** (`manifests/providers/`) - LLM API providers and platforms
+  - Example: OpenAI, Anthropic, DeepSeek, OpenRouter, SiliconFlow
+- **Vendors** (`manifests/vendors/`) - Companies and organizations behind the tools
+
+### Manifest File Structure
+
+Each manifest file is a JSON object following a specific schema. Here's a basic example for a CLI tool:
+
+```json
+{
+  "$schema": "../$schemas/cli.schema.json",
+  "id": "tool-id",
+  "name": "Tool Name",
+  "description": "Brief description of the tool",
+  "websiteUrl": "https://example.com",
+  "docsUrl": "https://docs.example.com",
+  "vendor": "Vendor Name",
+  "latestVersion": "1.0.0",
+  "githubUrl": "https://github.com/vendor/tool",
+  "translations": {
+    "de": {
+      "description": "Kurze Beschreibung des Tools"
+    }
+  }
+}
+```
+
+### Adding Translations
+
+You can add multilingual support by including a `translations` field:
+
+```json
+{
+  "description": "English description",
+  "translations": {
+    "de": {
+      "description": "Deutsche Beschreibung"
+    },
+    "zh-Hans": {
+      "description": "简体中文描述"
+    },
+    "ko": {
+      "description": "한국어 설명"
+    }
+  }
+}
+```
+
+### Validation
+
+All manifest files are automatically validated against JSON schemas. Make sure your JSON:
+- Follows the schema for the category
+- Has valid URLs (HTTPS only)
+- Includes all required fields
+- Is properly formatted
 
 ## Project Structure
 
-- `manifests/` - JSON metadata files for all tools and platforms
-- `content/` - MDX documentation, guides, and articles
-- `src/` - Next.js 15 application source code
+- `manifests/` - **JSON metadata files** for all tools and platforms (this is where you contribute!)
+- `content/` - MDX documentation, guides, articles, and FAQs (multilingual)
+- `src/` - Next.js application source code
 - `public/` - Static assets and resources
+- `scripts/` - Validation and data processing scripts
+- `translations/` - i18n translation files for all supported languages
 
 ## Tech Stack
 
@@ -39,7 +126,7 @@ AI Coding Stack is a comprehensive directory and community-maintained metadata r
 
 ## Contributing
 
-We welcome contributions! Please check the manifest files in `manifests/` to add or update tool information.
+We welcome contributions! Please check the manifest files in `manifests/` to add or update tool information. See [CONTRIBUTING.md](CONTRIBUTING.md) for detailed contribution guidelines and schema references.
 
 ## Contact