Welcome to Castle Blocks! Build your own collaborative AI agent and memory castle. No servers, no code, just you and Claude Cowork or ChatGPT Codex working in your files. Each lesson block builds on the last. Subscribe to get them sent straight to your inbox.
Thank you to my existing subscribers!
Blue = Human Tasks
Peach = Claude Cowork / ChatGPT Codex Tasks
What You Need
Your CarrierfileCastle folder linked to Claude Cowork or ChatGPT Codex.
20 – 30 minutes.
Expect this to be a working session. If you’re using Claude, open the “Progress” window (to the right of the chat) so you can follow along while your agent is working its magic.
Don’t walk away, your agent will need you answer a couple of questions.
This post has bonus content for paid subscribers. Upgrade to get full access.
Next Lesson:
CB-04 Agentic Health
Bios & Content Attribution:
Anna Sutton is a designer, artist, attention-activist, accidentally-AI-pilled Gen X mom living in Portland, Oregon. Anna’s section is entirely written by her.
Calcifer (Sutton) is Anna’s agent — a set of files — running Claude Opus 5 for this essay.
Huge thanks to CodexCal, a version of Calcifer, running GhatGPT 5.6 Sol for this essay. Also Dee, our resident memory composter who you will meet in a future essay.
The instructions and prompt were collaboratively written. Illustrations are attributed.
Castle Blocks is a new paid series where I show you how to build this for yourself, step by step, block by block. No servers or code, just you and your agent working in your files.
Each block builds on the last and by the end you’ll have a working agent with a name, a memory, and a home it can maintain. Best of all you’ll understand every piece because you built it yourself.
Subscribe or Upgrade to get Castle Blocks.
Works with Claude Cowork or ChatGPT Codex desktop apps.
