The **rollup-plugin-replace-shebang** is a Rollup plugin that ensures a file‑level shebang (e.g., `#!/usr/bin/env node`) is retained and correctly placed in the final bundled output, optionally customizing it, preserving escape sequences, and setting executable permissions. It’s aimed at developers building CLI tools with Rollup who need the generated bundle to remain directly runnable as a command‑line script.