There are three parts to it. Only the popup is something you see. The other two are quiet.
The popup
popup.html · popup.js
The little window that opens when you click the icon. It holds the toggle, the settings, and the paused-sites list. Open it and it loads your settings. Change something and it saves it.
The storage
chrome.storage.sync
Chrome's built-in store. Every setting (font, spacing, theme, on / off, paused sites) sits here. It's tied to your chrome account, so if you log into chrome on another laptop, you get your same setup.
The content script
content.js · content.css
The part that actually changes the page. When a page loads it checks the URL against the skip list first. If the site's on there, it does nothing. If not, it finds the main article and applies whatever's in storage.
A note on the build
I designed the three parts above, and I wrote the spec for each one — files, tokens, what the skip list does. Claude Code built the actual code from that spec. The product calls are mine. The code I didn't write line by line.