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+# Shopkeeper Order Items Custom
+
+A Magento 2 module that customizes the order item columns in the Magento admin panel. This module removes tax columns, adds a cost column, and makes product names and SKUs clickable for quick product editing.
+
+## Features
+
+- **Remove Tax Columns**: Hides tax amount and tax percent columns from order item view
+- **Add Cost Column**: Displays product cost alongside price for profitability analysis
+- **Clickable Product Links**: Product names and SKUs link directly to product edit page
+- **Clean Admin Interface**: Streamlined order view focusing on essential information
+- **Security**: Properly escapes HTML output to prevent XSS vulnerabilities
+
+## What It Does
+
+### Column Modifications
+
+**Removed Columns:**
+- Tax Amount
+- Tax Percent
+
+**Added Columns:**
+- **Cost** - Displays the product's cost attribute (positioned after price column)
+
+### Interactive Features
+
+- **Product Name**: Clickable link to product edit page (opens in new tab)
+- **SKU**: Clickable link to product edit page (opens in new tab)
+- Both links show "Edit Product" tooltip on hover
+
+### Cost Display
+
+- Fetches product cost from catalog
+- Formats currency using order's currency settings
+- Displays "N/A" if:
+  - Cost attribute is not set
+  - Product no longer exists
+  - Cost data is unavailable
+
+## Installation
+
+### Via Composer
+
+Add the repository to your Magento project's `composer.json`:
+
+```json
+{
+    "repositories": {
+        "module-order-items-custom": {
+            "type": "vcs",
+            "url": "https://code.shopkeeper.dev/McQueen/module-order-items-custom.git"
+        }
+    }
+}
+```
+
+Then install:
+
+```bash
+composer require shopkeeper/module-order-items-custom:dev-main
+php bin/magento module:enable Shopkeeper_OrderItemsCustom
+php bin/magento setup:upgrade
+php bin/magento setup:di:compile
+php bin/magento cache:flush
+```
+
+### Manual Installation
+
+```bash
+# From your Magento root directory
+mkdir -p app/code/Shopkeeper/OrderItemsCustom
+# Upload all module files to app/code/Shopkeeper/OrderItemsCustom/
+
+php bin/magento module:enable Shopkeeper_OrderItemsCustom
+php bin/magento setup:upgrade
+php bin/magento setup:di:compile
+php bin/magento cache:flush
+```
+
+## Usage
+
+After installation, the changes are automatically applied to all order views in the admin panel.
+
+### Viewing Orders
+
+1. Go to **Sales > Orders**
+2. Open any order
+3. Scroll to the **Items Ordered** section
+
+You'll see:
+- No tax columns
+- A new "Cost" column showing product costs
+- Clickable product names and SKUs that open the product edit page
+
+### Analyzing Profitability
+
+With both Price and Cost visible side-by-side, you can quickly:
+- Calculate profit margins
+- Identify high-margin products
+- Review cost accuracy for ordered items
+
+## Requirements
+
+- Magento 2.4.x (or 2.3.x with compatible framework versions)
+- PHP 7.4, 8.1, 8.2, or 8.3
+- Product cost attribute configured in Magento
+
+## Technical Details
+
+### Plugin Architecture
+
+The module uses Magento's plugin system (interceptors) to modify:
+
+1. **Magento\Sales\Block\Adminhtml\Order\View\Items**
+   - Plugin: `ItemsColumns`
+   - Removes tax columns
+   - Adds cost column definition
+
+2. **Magento\Sales\Block\Adminhtml\Order\View\Items\Renderer\DefaultRenderer**
+   - Plugin: `DefaultRenderer`
+   - Renders cost column with formatted values
+   - Adds clickable links to product names and SKUs
+   - Handles missing products gracefully
+
+### Module Structure
+
+```
+Shopkeeper/OrderItemsCustom/
+├── Plugin/
+│   └── Order/
+│       └── View/
+│           ├── ItemsColumns.php
+│           └── Items/
+│               └── Renderer/
+│                   └── DefaultRenderer.php
+├── etc/
+│   ├── di.xml
+│   └── module.xml
+├── composer.json
+└── registration.php
+```
+
+### Cost Attribute
+
+The module expects a product attribute with code `cost`. To configure:
+
+1. Go to **Stores > Attributes > Product**
+2. Ensure "cost" attribute exists
+3. Set costs for your products via:
+   - Bulk import
+   - Individual product edit pages
+   - API updates
+
+## Troubleshooting
+
+### Cost shows "N/A" for all products
+
+**Possible causes:**
+1. Cost attribute not configured
+2. Cost values not set for products
+3. Permissions issue accessing product data
+
+**Solutions:**
+```bash
+# Verify cost attribute exists
+php bin/magento catalog:product:attributes:list | grep cost
+
+# Reindex if needed
+php bin/magento indexer:reindex
+
+# Check product has cost value
+# Go to Catalog > Products > Edit Product > Advanced Pricing
+```
+
+### Links not working
+
+1. **Clear cache:**
+   ```bash
+   php bin/magento cache:flush
+   ```
+
+2. **Check admin permissions:**
+   - Ensure your admin role has access to edit products
+
+3. **Verify module is enabled:**
+   ```bash
+   php bin/magento module:status Shopkeeper_OrderItemsCustom
+   ```
+
+### Tax columns still showing
+
+1. **Clear generated code:**
+   ```bash
+   rm -rf generated/code/*
+   php bin/magento setup:di:compile
+   ```
+
+2. **Clear cache:**
+   ```bash
+   php bin/magento cache:flush
+   ```
+
+## Customization
+
+### Removing Different Columns
+
+To remove other columns, edit `Plugin/Order/View/ItemsColumns.php`:
+
+```php
+// Add to the $excludedColumns array
+$excludedColumns = [
+    'tax-amount',
+    'tax-percent',
+    'discount-amount',  // Add this line to remove discount column
+];
+```
+
+### Adding Different Columns
+
+To add more columns, modify the same file:
+
+```php
+$columns = $result->setData([
+    // ... existing columns ...
+    'your-column-name' => [
+        'label' => __('Your Column Label'),
+    ],
+]);
+```
+
+Then implement rendering in `Plugin/Order/View/Items/Renderer/DefaultRenderer.php`.
+
+## Compatibility
+
+- Magento Open Source 2.3.x, 2.4.x
+- Magento Commerce 2.3.x, 2.4.x
+- PHP 7.4, 8.1, 8.2, 8.3
+
+## Support
+
+For issues or questions:
+1. Check Magento logs: `var/log/system.log`
+2. Verify module status: `php bin/magento module:status`
+3. Ensure cost attribute is configured
+4. Clear cache and recompile
+
+## License
+
+OSL-3.0, AFL-3.0
+
+## Version
+
+1.0.0
+
+## Author
+
+Shopkeeper (taber@shopkeeper.dev)