`rollup-plugin-shebang` is a tiny Rollup.js plugin that automatically prepends a Unix‑style shebang line (e.g., `#!/usr/bin/env node`) to the generated bundle. It’s aimed at developers who use Rollup to build command‑line Node.js scripts and need the output file to be directly executable. The plugin is installed via npm and added to the `plugins` array in a Rollup configuration.