skills/.changeset/teach-shared-assets.md

mattpocock-skills
patch

Make the teach skill reuse-first. Lessons are now built from reusable components in ./assets/ — stylesheets, quiz widgets, simulators, diagram helpers. Reuse is the default: the agent reads ./assets/ before authoring a lesson, builds from what's there, and extracts anything new and reusable into a component rather than inlining it.