xmarkVol. MMXXVI
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Vol. MMXXVI  ·  The xmark libraryfirst edition

Frontispiece — an editorial preface.

A private
library for the
things you saved
on X.

Bookmarks are a graveyard. xmark is the index, the reading room, and the librarian — one calm place to revisit, search, and converse with every post you ever meant to come back to.

Become a memberor, read the preface ↓
EX · LIBRISreader · vol mmxxviXM

issued to

— the bearer of these bookmarks —

MBR·26·—————
recto · pg. 001turn the page ↓May 20, 2026
Plate I.the preface

You bookmark everything. Then you forget where it all went.

In another life you saved that thread. Three months ago, maybe four. About a tool, or a startup pivot, or a way of thinking you wanted to remember. You tapped the icon, and it joined the others — a quiet pile somewhere behind a tab you never open. Hundreds of saved tweets. Searchable only by the unreliable archeology of memory.

The feed never gave you a catalog. So we built one.

“A bookmark, unread, is just a photograph of an intention.”

— from the colophon

acquisitions logLOG·26·000482
saved this week
47
revisited
3
forgotten
44
Plate II.the card catalog

In three steps, your archive becomes a library.

Connect · catalog · converse. Roughly the same procedure used by the Bodleian since 1602.

I.auth · 003

Sign in to your X.

We connect through the same OAuth your favorite reader uses. No password, no extension.

pg. 001
II.index · 011

We catalog every bookmark.

Each saved post is fetched, indexed, and shelved — author, thread, date, the surrounding context.

pg. 002
III.query · 421

Then we read alongside you.

Ask a question. The librarian replies with cited passages, threading citations back to the original posts.

pg. 003
Plate III.the reading room

Ask the archive a question. Receive a footnoted reply.

A conversation, in the parliamentary sense — with citations.

in session
Reading Room · Carrel 03

what have I saved about AI tools recently?

the reader · 10:42

the librarian replies

|

cited entries

  • 1.@typesfast — workflow setup for cursorBKM·26·000841
  • 2.@v0dev — v0 vs lovable comparisonBKM·26·000817
  • 3.@claudeai — claude code release notesBKM·26·000792
Pose another question↵ to ask
Plate IV.the membership

Apply for a reader's card.

Five dollars a month. Cancel at any time, take your catalog with you.

visitor passVIS·26·000—00

Day visitor

Browse the stacks. Limited reference desk hours.

$0/ month
  • ·20 chat messages each month
  • ·1 bookmark sync per day
  • ·3 citations per answer
  • ·one open conversation at a time
Start as a visitor
ISSUED20 MAY 2026
reader's cardBKM · 26 · ——————

The reader.

Open access to every stack. The librarian on call, day and night.

$5/ monthor $50 / year — saves $10
  • ·unlimited chat — ask the archive anything
  • ·unlimited bookmark syncs — always current
  • ·unlimited citations and concurrent conversations
  • ·API keys & webhooks for your own agents
  • ·seven-day trial on annual membership
Apply for a reader's card →

No commitment. Cancel from your profile, no questions at the desk.

Fasc. ∞.the colophon

A note on the binding.

This volume was set in Fraunces for display and Inter Tight for running text. Catalog notations in IBM Plex Mono. Printed nightly from Vercel, on paper milled in Supabase.

the building

  • Become a member
  • Existing reader sign in
  • Re-read the preface

administrative

  • Privacy
  • Terms
  • Write the desk

© MMXXVI · xmark · published by jclvsh

Long may the stacks open at the very page you needed.