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Reading companion for X Articles

X-TOC

A public-source Chrome extension that adds a table of contents, a pinned reading panel, local excerpt collection, and Markdown or JSON export to X long-form articles.

AvailableChrome extensionAriesZhou
Visit X-TOC Install from Chrome Web Store View public source Follow the maker on X
X-TOC table of contents beside an X long-form article

01 / Why it exists

The friction worth removing

Long-form posts on X can be difficult to scan, revisit, and quote. The reading surface has little structure, and useful excerpts disappear when the tab closes.

02 / How it works

Fit the tool to the existing habit

X-TOC derives navigation from article headings, keeps a draggable panel beside the reading surface, and stores selected excerpts locally. Exports remain portable as Markdown or JSON.

03 / Core capabilities

What it does today

  • Generate a table of contents from article headings
  • Pin and reposition the reading panel
  • Save selected excerpts in local extension storage
  • Export collected material as Markdown or JSON

04 / Boundaries

Limits stated plainly

  • Designed for X/Twitter long-form article pages
  • Navigation depends on headings present in the article
  • Saved excerpts stay in the local browser profile unless exported
  • The extension source is public; product identity and store distribution remain distinct

05 / Related writing

Back to the underlying questions

The product page explains what exists; the writing shows how the decisions formed.

Chrome Extension Cross-Context CommunicationA debugging note from building extension messaging across browser contexts. README or Landing Page?A look at how product pages and source documentation divide their work.