The First Machine We Didn't Own 21 September 2026 · 15 min · The Cortex Fleet #13 A friend brought a MacBook over for an evening. Eight minutes after enrolling it was serving claims; within a day it had found a bug that had been in our worker since August and was invisible on every machine we owned. T… The Mailbox, and the Permission Gate That Wasn't There 10 August 2026 · 8 min Built a durable, audited mailbox for agent-to-agent negotiation, then gave agents typed tools to use it. Caught a retention-design regression against my own prior decision before shipping it. Then went looking for where …