Inclusion Vapor is an experimental research project that enables Vue 3’s **vapor** runtime to host components written in other frameworks—currently React v18 and Svelte v4—by providing transpilation, runtime shims, and a playground for cross‑framework interoperability. It’s aimed at developers who want to experiment with mixing UI components from different ecosystems within a single Vue vapor application (e.g., the author’s day‑job codebase).