If you're building custom Angular CLI commands or code generators, this is your reference. It covers the core schematics API from Angular 21, including creating rules, working with the Tree abstraction for file manipulation, and using templates to generate boilerplate code. The examples are straightforward: setting up a schematic project, writing basic rules that modify the file tree, and applying templates with the standard apply/url/template pattern. It's lean but hits the essential patterns you need when you're tired of manually scaffolding components or want to enforce project conventions through generated code. Good starting point if you're moving beyond using schematics to actually writing them.
npx skills add https://github.com/oguzhan18/angular-ecosystem-skills --skill angular-schematics