My free AI courses
Two courses to put AI to work for you.
One teaches you to build AI agents, the other to give a memory to the AI you already use. Both are free, need no account, run at your own pace, and end with something that works on your machine, not with a certificate.
Build your second brain
A notebook that AI files, links and searches for you, without writing a single line of code.
- Who it's for
- Everyone, no coding
- Level
- Beginner
- Time
- About 4 h
- Contents
- 6 modules, 8 step-by-step guides and a downloadable kit
By the end, you will be able to
- Set up a structured Obsidian vault where every note links to the others
- Write the rules file that tells Claude how to maintain your notes
- Add a document, ask a question and find the answer filed away
- Read your own knowledge graph and spot what is missing
- Cut the context loaded each session by more than half
Building AI agents
Go from a chatbot that answers to an agent that acts, makes fewer mistakes and can be measured.
- Who it's for
- Developers
- Level
- Intermediate
- Time
- About 9.5 h
- Contents
- 10 modules, 23 coding exercises in the browser
By the end, you will be able to
- Explain what an agent is and how it differs from a plain model call
- Give an agent tools and connect its memory to your documents (RAG)
- Choose between one agent and several, and know when it pays off
- Evaluate an agent with tests rather than gut feeling
Which one first?
- You have never written code
- Start with the second brain. Everything happens in Obsidian, with plain-English instructions to copy and paste.
- You can read JavaScript
- Start with AI agents. The exercises run in the browser, with nothing to install.
- You want both
- Second brain first. An agent without memory starts from scratch every conversation: the second brain is that memory, and the RAG module of the agents course shows how to plug it in.
Why this second brain costs less than the basic method
The method Andrej Karpathy published (a Markdown wiki maintained by an LLM) rereads its full index every session. The course shows the architecture I use every day, and what it saves. Figures measured on my own second brain, about 90 pages:
| Operation | Reread everything | With routing | Saving |
|---|---|---|---|
| Context loaded at the start of each session | ≈ 4,400 tokens | ≈ 1,650 tokens | −63% |
| Asking your notes a question | ≈ 17,000 tokens | ≈ 6,000 tokens | −65% |
| Filing the day's notes | ≈ 235,000 tokens | ≈ 16,000 tokens | −93% |
| Asking a question already asked | answer recomputed | filed answer, reread | 0 tokens |
To be honest: over a real working day, the biggest lever is still starting a fresh conversation whenever the topic changes. The course covers that too, because no architecture makes up for a bad habit.
Frequently asked questions
Why is it free?
Because these courses get my work known, and I'd rather show what I can do than describe it. I'm a freelance developer: if you want help with a project, a call is offered at the bottom of the page. You never need it to follow the courses.
Do I have to pay for anything?
Not for the courses. The agents course runs entirely in the browser. The second brain course uses Obsidian (free) and Claude Code, which needs a paid Claude plan (Pro or above). Better to know before you start.
Do I need an account?
No. Your progress is kept in your browser and nowhere else.
Which language?
English and French, with the same content. Some videos in the agents course are in English only.
Got a project in mind?
Want to apply one of these courses to your business, or have it done for you? Let's take 20 minutes.
Book a call