SiteDev Utilities & Vibe-Coding Tooling · UnJS toolkit
Composable CLI builder with typed argument definitions, nested subcommands, auto-generated usage output and lazy command loading.
Why it’s a gem
The nicest small CLI framework in JS, hidden inside the UnJS package wall.
Markdown maintainer that regenerates blocks in your README from live data such as package metadata, file contents or badges.
Dependency-free QR code generator that renders to SVG, Unicode or ANSI in any JavaScript runtime including edge workers.
Programmatically edit JavaScript and TypeScript source files by mutating a proxied AST, preserving original formatting on write.
Self-hosted image proxy built on sharp that resizes, crops and reformats images from URL path modifiers, with caching.
Build plugin that generates metric-matched local fallback fonts automatically, eliminating layout shift while a webfont loads.
Downloads templates and subdirectories from GitHub, GitLab or Bitbucket into a local folder, with caching and offline support.