After the madness of codegarden i dusted off some blog posts on Razor class libraries and packages - (all based on @Jason's work!) - Part 1 : Into to RCL and Umbraco packages : https://dev.to/kevinjump/umbraco-10-razor-class-library-packages-pt1-3nfa - Part 2: Making an Umbraco RCL package : https://dev.to/kevinjump/umbraco-10-razor-class-library-packages-pt2-58an - Part 3: Converting an existing Umbraco package to RCL : https://dev.to/kevinjump/umbraco-10-razor-class-library-packages-pt3-40bb