● Claude training · Video notes · One page · 1 Nov 2026

Build an AI second brain with Claude.

Note apps store things you never read again. This setup has Claude read every note once, write it into a linked wiki, and keep that wiki current. Two tools: Obsidian (free) and the Claude desktop app. ▶ watch the 12-min video

The one ruleSave every good answer back into the wiki. That is what makes it compound.

Why it beats NotebookLM-style search compile once

Raw notesThe inputsarticles, PDFs, transcripts
Claude CodeThe programmerreads, files, links
WikiThe codebasegrows and stays current
ObsidianThe screenwhere you read it

Upload-and-ask tools rebuild the answer from scratch every time. Close the tab and the work is gone. Here the summary is written once and kept.

The vault 3 layers

raw-sources/  Claude reads only
wiki/         Claude owns
  index.md    every page + 1 line
  log.md      what changed, when
CLAUDE.md     the rules
user.md · soul.md
anti-ai-style.md

Make it sound like you

  • user.md: who you are, how you like answers
  • soul.md: who Claude is to you (a blunt chief of staff)
  • anti-ai-style.md: banned words and phrases
  • Do not type them. Let Claude interview you by voice.
01 · Feed

Clip it

Obsidian Web Clipper in Chrome, saving to raw-sources. One click per article.

Free
02 · Ingest

Compile it

Tell Claude a new source landed. It writes wiki pages, links them and updates index.md and log.md.

Claude desktop
03 · Ask

Query it

Claude opens index.md, finds the cluster, follows the links and answers with citations.

Graph view
04 · Save back

Keep it

Good table or breakdown? "Save this as a wiki page and update index.md."

Compounds

Then automate it 4 jobs

7:30 AMMorning brief on a cron job: what needs you, what came in.
MeetingsTranscripts land in raw-sources. Claude files decisions and actions. A note-taker connector does it by itself.
WeeklyHealth check: fix wrong or stale pages before they spoil later answers.
15 minObsidian Git plugin pushes the vault to a private GitHub repo.

Start today

  • Make the vault: raw-sources, wiki, CLAUDE.md
  • Drop in 5 things you already saved
  • Run your first ingest
  • Ask one question, save the answer back

Want the steps?

Page 2 has every step, a starter CLAUDE.md and the exact prompts, with ▶ timestamps.

Step by step →