We're building a forum app in Go for our Zone01 Kisumu cohort — five of us, split by feature: auth, posts, comments, filters, and me leading the core/integration side. Two weeks in, everything was compiling fine. Then one morning I pulled the latest code and the whole project refused to build. The error looked something like this: internal/posts/categories.go:6:2: package forum/internal/models is not in std "Not in std"? My package isn't in the standard library. Weird flex, Go, but okay...