Worked on documentation modernization and onboarding improvements for the pytorch/pytorch and pytorch/executorch repositories. Converted four documentation pages from ReStructuredText to MyST Markdown, using a careful commit strategy to preserve history and ensure maintainability. Updated ExecuTorch 1.0.0 iOS onboarding materials to reflect the latest SwiftPM integration, clarified Xcode product selection, and refreshed visual assets. Incorporated explicit validation steps, including diff checks and minimal builds, to ensure safe and reliable updates. Leveraged skills in MyST, Sphinx, Swift, and Xcode to improve documentation consistency, enhance user onboarding, and reduce setup friction, laying the foundation for future documentation standardization efforts.