Writing
Build Logs
Real systems I've built, what they cost, and what broke. Each post says what was tested and what wasn't.
Build Logs
Hybrid Recall for Agent Memory
Keyword and vector search over the same facts, merged by rank, on one Durable Object.
Build Logs
Long-Running Agent Jobs
A pattern for agent work that outlasts a single request, with durable state, human control and spend limits.
Build Logs
A Serverless Personal Agent
Moving an agent from an always-on virtual machine to Workers and Durable Objects, with shared memory and a persistent browser.
Build Logs
An Agent Built Around Cost
How tiered models, free compute and persistent memory kept an always-on agent at a few dollars a month, and why that did not hold.
Build Logs
Browser Agents in a macOS VM
Why DevTools sessions failed in a container, and how a virtual machine and a loopback proxy fixed them.