This prototype shows a desktop "browser" host that loads WebAssembly components with Wasmtime and renders them through Vello. It ships with a release-built counter guest so the demo works out of the box.

1. Launch the Nix development shell (direnv allow or nix develop). It provides Rust, cargo-component, Wasmtime, and all build tools.
2. Run the interactive counter window with just run (append release for a release build). The host will fall back to the embedded counter if no component path is provided.
3. Execute the full check suite with just ci before sending changes; it mirrors the GitHub Actions pipeline.

Extra helpers: just dist assembles a distributable bundle under dist/, and just ensure-cargo-component exits early if you forget to run inside the Nix shell.