So I turned it into a fully web-based generator: no terminal, no Node, no installs — just pick your apps and configs, and it outputs a ready-to-run .bat script.
The project is now open source and recently got a big update:
115 apps
80 system configurations
Bloatware removal
Windows 98-inspired UI
One-click script generation
Everything runs locally in your browser
Live version: https://kaic.me/win-post-install/