X Bookmark Injector
Turns bookmark hoarding into a reading habit — it slips one random saved X bookmark, styled as a native post, into the top of your For You feed.
The injected card (Option B): native X post anatomy + one muted line — From your bookmarks · #k of N · N left.
What it does
Native, not a dashboard
Renders as a real X post — avatar, author, date, media, engagement — not a separate widget.
Random but legible
One random eligible bookmark per Home load, with a stable save-order rank (#k of N) and remaining count.
Keep or clear
Keep-for-later (72h cooldown) or Done, which calls X's real delete-bookmark mutation with a 6-second Undo.
Local & private
Reuses your logged-in X GraphQL session — zero backend, zero telemetry, all state in the browser profile.
Under the hood
Chromium Manifest V3JavaScript ES modules
esbuildVitest — 290 tests
MAIN/ISOLATED world bridgedurable delete/undo saga
Why this is a still image, not a live app. X Bookmark Injector is a browser extension that
rewrites
x.com inside your logged-in session — it can't be hosted as a public
web app. This page previews the result; the runnable code (load-unpacked instructions + 290-test
suite) lives on GitHub.