tl;dr: Deno 2.9 introduces `deno desktop`, a command that bundles a Deno project (including Next.js, Astro, SvelteKit, and other frameworks it auto-detects) into a self-contained desktop binary with the Deno runtime and a webview. It defaults to the OS's native webview for small binaries but offers a bundled Chromium (CEF) option, uses in-process bindings instead of IPC, supports cross-compilation to macOS/Windows/Linux from one machine, and includes built-in bsdiff-based auto-updates. The feature is currently canary-only and APIs may change before stabilization.