What you'll learn
Three tracks, three levels of depth. Each stands alone, but the order tells a story: first you understands the invisible note, later assembles yours, finally, does what the labs.
Read the invisible note
What a system prompt is, its components and patterns — with no jargon, using everyday analogies.
Enter →Build prompts, skills, and agents
Hands-on: the Minimum Viable Prompt, persona, the Tool Contract, and the Operational Loop.
Enter →Do it like the labs
Reading diffs, consolidation, security by principle, and distill the brain of an agent based on the logs.
Enter →Who it's for
No matter where you start, there’s a path that begins at your level.
Beginner
Has never instructed an AI and doesn’t even know what a “prompt” is. Wants to understand, without jargon, what determines how each AI behaves. Starting from absolute zero.
Go to Track 1 →Practitioner
You already use AI and want to build things for real: prompts that work, skills that trigger at the right time, disciplined agents. You want to stop improvising.
Go to Track 2 →Advanced
Know the basics and want the lab-level material: read the evolution through diffs, consolidate without losing behavior, and recover an agent's method from its logs.
Go to Track 3 →We lost Fable. We recovered the method.
O Fable was a model with a rare discipline: it thought before acting, checked its own work, narrated its decisions. Then it went offline—and we were left missing way how it worked. Without the model weights, it seemed like that had disappeared along with them.
But it didn’t. Every conversation with an agent leaves a trail: the files .jsonl from each session. You can mine these logs with a script, extract the work discipline — the decision loop (ground → reason → act → observe → re-evaluate → verify → narrate) — and install this method in another model. It doesn't recover the brain; it recovers the manual for how it thought. That shift is the heart of Track 3.
The 3 paths in detail
Twenty modules, one hundred twenty topics. Each track has its own emoji, color, and level.
🧱 Fundamentals
The vocabulary and anatomy of the system prompt, from scratch.
🛠️ Practice
Build prompts, personas, tools, skills, and agents.
🧠 Advanced
Diffs, consolidation, safety, and distilling Fable's brain.
Bonus — Prompts Ready to Copy
13 complete system prompts, assembled with the course techniques (coding agent, research,
persona, subagent, brain distiller…). Copy, swap the {campos}, paste it.
Start instructing AI the way labs do
Thirty minutes in Track 1 and you'll never look at AI the same way again — you'll see the invisible note behind every answer. The course is free.