5 patterns · 5 working examples
A feature only becomes reusable when it passes a real test — self-contained, one door in, no reaching into the host app. Otherwise it's a connection, not a package.
5 patterns · 5 working examples
These aren't chapter titles — each one is an enforced rule your AI builds against. And the patterns don't just teach the shape: the working examples are real code that lands in your project.
Deciding whether a piece of code is actually ready to become its own package
What shape an extracted feature package needs to be installable
What an install flow needs to safely drop a feature into a host project
A real extraction walked end to end, deltas and all
Packaging a hosted-service integration as an installable add-on
Features get copy-pasted between projects, and every copy quietly drifts from the day it lands.