This is a primer on building VS Code extensions, covering various extension types such as themes, functional extensions, snippets, shortcuts, packs, and security measures to ensure reliable deployment. The typical architecture of VS Code extensions involves the Extension Host, manifest file, and entry file. Best practices include thorough testing, secure data storage, adherence to Microsoft's UX guidelines, bundling for cross-platform compatibility, and securing dependencies with tools like Snyk. By following these principles and using Snyk's security features, developers can create high-quality VS Code extensions that meet user expectations and ensure the integrity of their code.