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Lesson 1 of every course is free. One whole course is free. One payment of $10 opens all 19 courses in the catalogue today. What's included →

19 courses

Agents That Remember: Context Engineering & Memory

Build agents that remember. An agent's memory is just plain markdown files it reads, searches and updates for itself. Set that up and the agent gets better at your work every time it runs. You will keep deep detail out of the context window with progressive disclosure. You will stop two agents overwriting each other, using hashing and versioning. And you will decide what stays read-only and what an agent may rewrite. Predict, drag and decide your way through.

7 lessons

The Prompting Playbook: Debug a Production Prompt

Your production prompt worked, then you moved to a new model and the test cases started failing. This is the repair method, in order. Build a small eval suite of control, edge and capability-boundary cases, so you can tell a real improvement from a feeling. Strip the pasted-website cruft and the untrue persona. Carve the prompt into tagged sections so role, policy, guidelines and tone stop competing. Add an output contract and enforce it in the harness with a stop sequence. Then isolate one failing case at a time and find the instruction that made the wrong answer the compliant one. Worked end to end on a messy customer-support prompt for a fictional telco, then run on a prompt of your own. Based on “The Prompting Playbook” by Margot van Laar, Code with Claude.

7 lessons

Sort Tickets, Applications and CVs with Jev

Somebody spends their morning reading the same kind of thing over and over, answering the same question about each one. Most of that is not writing. It is one question, asked again and again, and the answer is one word. There is a kind of AI built only for answers like that. People call it a decision model. The steps here work with any decision model. The one you set up is called Jev. You write the one question, and the list of answers it is allowed to give. Every answer comes back with a number saying how sure it was. You decide which answers you accept, and which few get a second look. Eight short lessons. You finish with one filled-in card for a job of your own — hand it to your assistant, or to a developer.

8 lessons