A CHINESE TRADER BUILT A SECOND BRAIN IN OBSIDIAN THAT GENERATES 3 TRADING IDEAS EVERY MORNING AT 6AM AND MADE $180,000 IN 6 MONTHS.
No Bloomberg terminal.
No analytics desk.
No team of analysts.
A Mac Mini by the wall.
An iPhone in his pocket.
One local Obsidian vault.
Six N8N pipelines running 24/7, pulling every article he reads, every podcast he listens to, and every voice note he drops into a Telegram bot—directly into the vault.
Every night, a neural network reads across 4,000 connected notes and finds the strongest connections between fresh information and old theses.
Every morning at 6AM, a brief lands in his inbox:
- 3 trading ideas with confidence scores
- The emerging thesis of the week
- Any note that contradicts an active position
The system only wakes him up when a fresh note contradicts his thesis, or when an idea breaks 90% confidence.
Everything else runs without him.
The monthly bill: $120 in API costs.
The monthly return: approximately $30,000 into the account.
Traditional quant funds pay teams of 8 people to produce the same flow of insights.
He pays $120 and a Mac Mini.
The full system breakdown is in the article below.
Bookmark this before you pay for a Bloomberg subscription.
Follow @cyrilXBT for every solo operator setup that changes what one person can build.
I genuinely don't understand why everyone isn't using this yet
Andrej Karpathy, a co-founder of OpenAI, posted a simple idea that hit 16 million views: stop using AI to write code, use it to build a second brain.
You point Claude Code at a folder, drop in any source, an article, a transcript, a PDF, and Claude reads it, links it, and files it into a living wiki of everything you know. It compounds like interest, the more you feed it, the smarter it gets.
Here's the whole thing:
> Install Obsidian, create a vault, open it in Claude Code
> Paste Karpathy's wiki idea file and tell Claude to build it
> Claude makes three folders: raw for sources, wiki for its pages, a CLAUDE.md that runs it
> Drop any source into raw and say "ingest this"
> Ask questions across everything, forever
Five minutes to set up, and you never start from a blank chat again.
Full step-by-step guide with Claude and Obsidian, link below.
Bookmark this
SOMEONE WIRED 2,000 OF THEIR NOTES INTO A 3D BRAIN CLAUDE CAN READ - AND IT RUNS ON THE SAME TRICK I USE 23 TIMES
most people send Claude 100+ messages a week re-explaining who they are - and it forgets 100% of it the second the tab closes
this is the opposite. 1 file. written 1 time. read by Claude before every single task, forever
it's called SKILL.md. each one teaches Claude exactly 1 job - your voice, your research, your planning - and it never asks twice
the 3D brain in the video is just 1 skill maxed out: a memory pulled from 2,000 of your own notes, not a billion pages of internet sludge
i run 23 of them. same model everyone else opens - mine just shows up already knowing the work, 10x sharper
30 minutes for the first one. 5 minutes each after. 23 files, and the model turns into a different one
a prompt helps for 1 message. a skill pays you back every session, for life
the article below is the full folder - all 23, start to finish
SAKANA FUGU ULTRA vs. CLAUDE OPUS 4.8 RESULTS
Prompt: "build a really high quality single html file crossy road game with three.js"
Sakana Fugu Ultra:
- Tokens Used: ~89k ($7.32)
- Time Elapsed: 22 minutes
- Issues: inverted directional turn, wonky camera, no sfx, not identical to Crossy Road game
Claude Opus 4.8 Ultracode:
- Tokens Used: ~940k (~$37.85)
- Time elapsed: 79 minutes
- Issues: got stuck twice in a retry loop (had to prompt to self-correct), wrong character position after restart, difficult from the start (whereas Fugu's version got significantly more difficult as you progress, which is the correct behaviour)
I think in terms of application functionality, quality, and design, Opus won. In terms of model speed and performance, Fugu on Opencode won.
What are your thoughts? Comment down below who you think won! ⬇️