generating-custom-tab

What this skill does

## When to Use This Skill

Use this skill when you need to:
- Create tabs for objects, web pages, or Visualforce pages
- Add navigation tabs to applications
- Configure tab visibility and access
- Troubleshoot deployment errors related to custom tabs

## Specification

# CustomTab Metadata Specification

## 📋 Overview
Custom tabs for navigating to objects, web content, or Visualforce pages within Salesforce applications.

## 🎯 Purpose
- Provide navigation to custom objects
- Link to external web content
- Access Visualforce pages
- Organize application navigation

## ⚙️ Required Properties

### Core Tab Properties
- **customObject**: `true` for custom object tabs, `false` for all others.
- **motif**: Tab icon style — choose a motif that semantically matches the object's purpose. Do NOT reuse the same motif for every tab.
- **label**: Display name (required for non-object tabs ONLY; object tabs inherit label from the object)
- **url**: Web URL (for web tabs)
- **page**: Visualforce page name (for Visualforce tabs)


### 🚨 STRICT ELEMENT ALLOWLIST — READ THIS FIRST

**The root element MUST always be `<CustomTab>` (NOT `<Tab>`).** The XML namespace must be `xmlns="http://soap.sforce.com/2006/04/metadata"`.

Only the elements listed below are valid. **Any element not on this list WILL cause a deployment error.**

| Tab Type | ONLY these elements are allowed (nothing else) |
|---|---|
| **Object tabs** | `<customObject>` (required, set to `true`), `<motif>` (required), `<description>` (optional) |
| **Web tabs** | `<customObject>` (required, set to `false`), `<label>` (required), `<motif>` (required), `<url>` (required), `<urlEncodingKey>` (required, set to `UTF-8`), `<description>` (optional), `<frameHeight>` (optional) |
| **Visualforce tabs** | `<customObject>` (required, set to `false`), `<label>` (required), `<motif>` (required), `<page>` (required), `<description>` (optional) |

### ⚠️ FORBIDDEN ELEMENTS (every one of these causes a deployment error)
`<sobjectName>`, `<name>`, `<fullName>`, `<apiVersion>`, `<isHidden>`, `<tabVisibility>`, `<type>`, `<mobileReady>`, `<urlFrameHeight>`, `<urlType>`, `<urlRedirect>`, `<encodingKey>`, `<height>`, `<auraComponent>`

Also forbidden:
- `<label>` on object tabs (object tabs inherit their label from the custom object)
- `<page>` on web tabs (only for Visualforce tabs)
- Empty elements like `<page></page>` or `<description></description>`
- Any element not in the allowlist table above

## 🔧 Tab Types

### Object Tabs
- **Purpose**: Navigate to custom or standard objects
- **File name** determines the object: `{ObjectApiName}.tab-meta.xml` (e.g., `Space_Station__c.tab-meta.xml`)
- **Required elements**: `<customObject>true</customObject>` and `<motif>`
- **Correct example** (for a Space_Station__c.tab-meta.xml):
```xml
<?xml version="1.0" encoding="UTF-8"?>
<CustomTab xmlns="http://soap.sforce.com/2006/04/metadata">
    <customObject>true</customObject>
    <motif>Custom39: Telescope</motif>
</CustomTab>
```
- **Correct example** (for a Supply__c.tab-meta.xml — note different motif):
```xml
<?xml version="1.0" encoding="UTF-8"?>
<CustomTab xmlns="http://soap.sforce.com/2006/04/metadata">
    <customObject>true</customObject>
    <motif>Custom98: Truck</motif>
</CustomTab>
```
- **❌ WRONG** — do NOT add `<sobjectName>`, `<name>`, `<fullName>`, or `<label>`:
```xml
<CustomTab xmlns="http://soap.sforce.com/2006/04/metadata">
    <sobjectName>Space_Station__c</sobjectName>  <!-- DEPLOYMENT ERROR -->
    <label>Space Station</label>                  <!-- DEPLOYMENT ERROR on object tabs -->
    <customObject>true</customObject>
    <motif>Custom57: Desert</motif>
</CustomTab>
```

### Web Tabs
- **Purpose**: Link to external websites or web applications
- **File name**: Use a descriptive name: `{TabName}.tab-meta.xml` (e.g., `Knowledge_Base.tab-meta.xml`)
- **COPY THIS EXACT TEMPLATE** — only replace the placeholder values. Do NOT add, remove, or rename any XML elements:
```xml
<?xml version="1.0" encoding="UTF-8"?>
<CustomTab xmlns="http://soap.sforce.com/2006/04/metadata">
    <customObject>false</customObject>
    <description>REPLACE_WITH_DESCRIPTION</description>
    <frameHeight>600</frameHeight>
    <label>REPLACE_WITH_LABEL</label>
    <motif>REPLACE_WITH_MOTIF</motif>
    <url>REPLACE_WITH_URL</url>
    <urlEncodingKey>UTF-8</urlEncodingKey>
</CustomTab>
```
- **These 7 elements above are the ONLY elements allowed in a web tab file.** Do not add ANY other elements.
- The `<description>` element is optional — you may remove it if not needed, but do not add anything else.

### Visualforce Tabs
- **Purpose**: Access custom Visualforce pages
- **File name**: `{TabName}.tab-meta.xml` (e.g., `Custom_Page_Tab.tab-meta.xml`)
- **Required elements**: `<customObject>false</customObject>`, `<label>`, `<motif>`, `<page>`
- **Correct example**:
```xml
<?xml version="1.0" encoding="UTF-8"?>
<CustomTab xmlns="http://soap.sforce.com/2006/04/metadata">
    <customObject>false</customObject>
    <label>Custom Page</label>
    <motif>Custom46: Computer</motif>
    <page>CustomPage</page>
</CustomTab>
```

## 🎨 Tab Configuration

### Tab Style
- **Default**: Use standard tab styling
- **Custom**: Can specify custom tab styles if needed

### Tab Visibility
- **Default**: Visible to all users with access
- **Custom**: Can be configured for specific user profiles

## 📱 Supported Applications
- **Standard Apps**: Available in standard Salesforce applications
- **Custom Apps**: Can be included in custom applications
- **Community Apps**: Available in community applications

## 🔗 Integration Points
- **Object Relationships**: Links to related object records
- **Web Content**: External website integration
- **Visualforce Pages**: Custom page functionality
- **Lightning Components**: Modern component integration
## ✅ Best Practices
- Use clear, descriptive tab labels
- Choose appropriate tab types for functionality
- **Select a unique, contextually relevant motif for each tab** — do not default every tab to the same icon
- Consider user experience and navigation flow
- Test tab functionality across different applications
- Ensure proper permissions and visibility settings
- Follow consistent naming conventions
- Object tab files MUST only contain `<customObject>true</customObject>` and `<motif>` — nothing else
- Web tab files MUST only contain: `<customObject>false</customObject>`, `<label>`, `<motif>`, `<url>`, `<urlEncodingKey>`, and optionally `<description>`, `<frameHeight>` — nothing else
- Never include `<isHidden>`, `<tabVisibility>`, `<type>`, `<mobileReady>`, or empty elements