fastpaca What happens when LLMs hit production?
I write about memory systems, context management, agents, evals, and the parts of AI infrastructure that break when real users show up.
I'm Seb. I've spent years around trust & safety, platform work, and AI tooling; fastpaca is where I write down what keeps being useful.
Writing
All posts →What I Learned Rolling Out AI to 900+ Engineers
Lessons from leading AI adoption across 900+ engineers inside a $2bn+ company.
The Hamster Wheel That Drains You
Validation can quietly replace motivation, until you mistake the version of yourself people expect for the version you want to be.
Building on a Moving Train
AI infrastructure feels brittle because every primitive beneath it moves. Here's what I learned building and killing infrastructure in a field that reinvents itself every quarter.
Let's Build an AI Assistant That Remembers
A practical walkthrough of building an assistant with persistent memory using Cria.