roadmap_handlers.go (740 LOC) → roadmap_handlers.go, roadmap_item_handlers.go, roadmap_import_handlers.go
academy/store.go (683 LOC) → store_courses.go, store_enrollments.go
cmd/server/main.go (681 LOC) → internal/app/app.go (Run+buildRouter) + internal/app/routes.go (registerXxx helpers)
main.go reduced to 7 LOC thin entrypoint calling app.Run()
All files under 410 LOC. Zero behavior changes, same package declarations.
go vet passes on all directly-split packages.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>