Fourteen starters
One reference implementation per track, each a working project rather than a template.
Full-stack in Rust, Go, Python and Node. Frontend in React, Svelte and HTMX. Mobile in Kotlin, Flutter and React Native. Games in Bevy and Godot. Embedded on the ESP32. Data work in JupyterLab. A DevOps track with OpenTofu and observability already wired in.
Each one runs, has tests, and pins its versions. A learner who cannot get a project to start learns nothing except that the ecosystem is hostile.