rollup-plugin-shebang-bin is a Rollup plugin that preserves or inserts shebang (hashbang) lines and makes scripts executable, primarily for Node.js CLI tools. It's designed for developers building command-line applications with Rollup who need to ensure their output files have the correct shebang and executable permissions. The plugin offers extensive configuration options for customizing the shebang content, file patterns, permissions, and handling of existing shebangs.