F8 2019 Day 1 keynote and session videos

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This post details several technical sessions from F8 2019, highlighting Meta's use of React, GraphQL, and Relay for building Facebook.com, including React Suspense. It also covers advancements in mobile development with React Native, ComponentKit, and Litho, and the NLP service Wit.ai. The use of Docusaurus for open-source websites, Python's role in Meta's infrastructure, and the development of a new Messenger app review chat support channel are discussed. Technical deep dives into building Messenger automated experiences, internationalization at scale with FBT, and the development of a mobile AI platform for edge ML are presented. Finally, the rebuilding of Messenger from the ground up for improved performance is outlined.