Explore the intricacies of creating compatible and well-designed Yocto Project layers in this 30-minute conference talk by Paul Barker. Learn essential design principles to maximize layer compatibility and ensure useful error messages when layers are used incorrectly. Gain a comprehensive understanding of variables, tasks, distro features, and overrides within the Yocto Project ecosystem. Discover proper techniques for using bbappends, conditionals, distro & machine features, and sanity checks. Examine examples of well-behaved layers and update your knowledge to target the Langdale (4.1) and Kirkstone (4.0, LTS) releases. Delve into topics such as layer documentation, simplifying layer.conf, adding new content, modifying existing recipes, using overrides and features, implementing conditional syntax, adding build-time checks, and utilizing anonymous Python functions and classes. Gain insights into the bblayers.conf parsing details and learn how to effectively use the yocto-check-layer script to improve your layer development process. Read more