This cli can be used to update local TiddlyWiki Classic with the new core from its official site.
It requires Node.js to work. With npx, it's not necessary to download/clone it manually.
Usage: npx github:YakovL/TwUpgradeCli --input ./path/to/tw.html (on Windows, \s in path are also supported).
Note: this script currently reproduces some of the core functionality, so may get outdated in the future (copies content, markup blocks, and title).