Salesforce DX Developer Guide

How Salesforce Developer Experience Changes the Way You Work
Salesforce CLI Configuration and Tips
Project Setup
Authorization
Metadata Coverage
Scratch Orgs
Sandboxes
Development
Build and Release Your App
First-Generation Managed Packages
Unlocked Packages (Generally Available) and Second-Generation Managed Packages (Beta)
Second-Generation Packaging
What’s a Package?
Types of Packaging Projects
Before You Create Second-Generation Packages
Workflow for Second-Generation Packages
Plan Second-Generation Packages
Namespaces
Package Types
Best Practices for Second-Generation Packages
Package IDs
Configure Packages
Create a Package
Install a Package
Migrate Deprecated Metadata from Unlocked Packages
Uninstall a Package
Continuous Integration
Troubleshoot Salesforce DX
Limitations for Salesforce DX
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Plan Second-Generation Packages

Investing time to plan your package helps you to develop, build, and deploy it successfully. Good planning ensures that your package is reusable and easily upgradable.