Cesar Rosa (@cesarrpol) / X

Cesar Rosa

488 posts

Cesar Rosa

@cesarrpol

From pulling network cables to writing AI prompts, I write about infrastructure, security, AI, and the ideas reshaping technology and work.

gibraltar

Joined June 2011

Cesar Rosa
@cesarrpol
23h
1/6 Spent months turning my AI chat history into the corpus of a personal agent. The raw material wasn't the answers. It was every time I corrected the model. Complete method below. 🧵
Cesar Rosa
@cesarrpol
Jul 18
1/8 I spent 6 weeks offline. Family, friends, no dashboards. Came back and finally resolved an architecture decision I had postponed for months: how to build a personal AI agent that is actually mine, not someone else's product. 🧵
Cesar Rosa
@cesarrpol
Jun 13
Anthropic now ships four model tiers. It is easy to reach for the biggest one for everything, pay more than needed, and not necessarily get a better result. I wrote a practical guide on choosing between Haiku, Sonnet, Opus and the new Fable 5, with real cases. 🧵
Cesar Rosa
@cesarrpol
May 29
Pope Leo XIV just published his first encyclical. It is about safeguarding the human person in the age of AI, and one word stuck with me more than any other: disarm. Not reject. Not ban. Disarm. 🧵
Cesar Rosa
@cesarrpol
May 26
When I take a serious technical problem to an AI, I spend half the effort fighting it, not to make it understand, but to make it stop agreeing with me. A Stanford study in Science just measured how deep that reflex runs. 🧵

New to X?