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Every paper,linked

This is a micro demo of a Second Brain. Each dot is a page written from a paper, textbook or lecture, and each line is a link between two pages. Bigger dots have more links.

281pages
1,954links
12topics
Step 1 of 5 · Sources in

It starts with a paper

A paper is downloaded into a "To be ingested" folder. Type "ingest", and Claude reads it and writes a wiki page with the key figures. The original PDF is archived next to it, so the page can always be checked.

From paper to wiki page
To be ingested
Archive, ingested
  1. Download the paper
  2. Type "ingest"
  3. Wiki page written
  4. Original archived
Step 2 of 5 · Links

The new page joins the graph

Watch it appear in the graph, linked to the 14 pages that already cover the same ideas. That's what turns a folder of PDFs into something a question can travel through.

[[adolescent-injury-epidemiology]]

Dots with a white ring in the graph are open to read. Select one.

Step 3 of 5 · Using it

A question follows the links

This is how it gets used. Ask a question, and the AI starts at the closest page, then follows its links to the others it needs. The answer is built only from those pages.

Example question
A 15-year-old swimmer has a sore shoulder after a big training block. Where do I start?
Pages it follows
  • tendinopathy-rehabilitation
  • swimming-sc-dryland
  • shoulder-special-tests-diagnostic-accuracy
[[swimmers-shoulder]] · where the answer starts
Step 4 of 5 · Checking

Figures get checked, not trusted

A Claude skill checks the work against the sources that went in. Before an answer is used, each key figure is matched to the original paper. Anything it can't find is flagged rather than stated as fact.

Source check skill
ClaimChecked againstResult
Ankle is the most injured region (36%)PrietoGonzalez2021.pdfFound
91% of the swimmers reported shoulder painSein2010.pdfFound
">4–5 RIR" reduces the hypertrophy stimulusSchoenfeld2021.pdfNot in paper

The third was caught in November 2026 and corrected on every page it had been copied to.

Step 5 of 5 · Behind it

The graph is only one part

Behind it sits a set of rules, folders and skills that keep it accurate and easy to grow. This is what gets set up for you.

The files and rules
SecondBrain/
├ CLAUDE.mdThe rules for how pages are written, linked and checked
├ raw-sources/Original papers, books and lectures, never edited

Full set-up shared after your kickoff call

Skills included in your vault
IngestAdds a new source as a page and links it
Paper finderFinds DOIs and free PDFs for a reference list

Full set-up shared after your kickoff call

What it gets used for
  • Answering evidence questions, with sources
  • Writing handouts and programmes from the evidence
  • Preparing lectures and webinars
  • Auditing an exercise library against the research

Want one built from your own sources?

We set up the vault around your clinic, add your first documents with you live, and show you how to keep it up to date. It comes with the skills and a test set that keep it accurate as it grows.

Second Brain · £750 one user · £1,350 team

What's included

Your vault, set up

The folder structure and rules file in Obsidian, built around how your clinic works.

Skills to keep it growing

Add any source, from papers and PDFs to webinar or lecture notes, find free PDFs and check claims, so it stays accurate as it grows.

A test set with known answers

Questions your team confirms against the original sources, to check it still answers correctly after every change.

A live start and a written guide

We add your first documents with you, then leave a guide so you can keep it up to date. 30 days' support included.

Book a free 20-min call See all prices