Obsidian graph view of my vault: each dot is a wiki page, each line a link between pages

WorkflowAI second brainSince Jul 2026

I stopped re-reading my notes. Now I ask them questions.

I set up Andrej Karpathy's "LLM Wiki" idea for my own notes. An AI keeps the vault linked and up to date, by my rules, and I ask it questions.

My role: Designed the setup, use it every day
Tools: Obsidian, Claude Code, plain Markdown
Based on: Andrej Karpathy's "LLM Wiki" idea
Since: July 2026

Impact

Knowledge that compounds
Every source and good answer stays in the wiki. A chat log would lose it.
Rules before automation
The AI never edits a source, never invents facts and flags contradictions instead of overwriting.
Less context to repeat
I ask the vault for facts and decisions. The wiki pages and Obsidian's graph view hold the context, so I don't explain it to the AI again each time.

Why I built it

I was overwhelmed by information, and much of it didn't matter for the task in front of me.

Andrej Karpathy's "LLM Wiki" idea fit that problem: an AI reads your sources and keeps a wiki of linked pages up to date. I set up my own version in July 2026, in plain files I can check.

Three layers

1Sources

Notes, handover documents and web clips. Saved once, never edited, so there is always a record of what was said.

2Wiki

Pages about ideas and projects. The AI writes and links them; I decide what matters.

3Rules

One file both of us follow: folder structure, page format, workflows, and what the AI may never do.

Five commands

ingestRead a new source, discuss it with me, then update every page it touches

syncPull changes from notes I'm still editing

queryAnswer from the wiki, linking to where each fact came from

lintFind contradictions, stale claims and orphan pages

hotcacheSave a short summary of where we left off

How it changed my workflow

When I join a project, I start from the handover documents. One ingest turns each one into linked wiki pages and updates every page it touches.

When I need a fact or a decision, I ask the vault. The answer links to the pages it came from, and Obsidian's graph view shows how they connect. I don't paste the same context into every chat.

At the end of a session, hotcache saves where I left off, and the next session starts from there.

Rules I set for the AI

Never invent facts. If a source is unclear, ask me.
Never edit a source. Sources are the record.
Flag contradictions instead of overwriting them.
Log every change, so I can see what happened and when.

What I learned

The AI is only as good as the rules, and it can be confidently wrong. Every claim links to its source, and I check it before I use it.

Next side projectLUNU ANGRY: a slingshot game I designed and drew for fans.