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 Probe That Measured Itself 23 August 2026 · 9 min · The Cortex Fleet #12 A model emitted one token 23,195 times and every health check said fine. Auditing why led to a capability-measurement system that was mostly measuring its own test harness — struct defaults serialized as findings, probes… Plexus: Giving the Cluster a Nervous System 14 August 2026 · 13 min Built a CRDT-gossiped telemetry mesh so every node in the cluster knows every other node's hardware state in near-real-time. Discovered my capacity numbers had been fiction the whole time — the registry said 96 GB, sysfs… Small Models, One Semaphore: NPU Use-Cases, a Concurrency Rewrite, and Flux.2's Ghost Dependency 1 August 2026 · 10 min · The Cortex Fleet #7 The NPU bring-up from a few posts back finally got real workloads: a chat router and speech-to-text, live. Getting there meant reverting a concurrency design after review, which surfaced a genuine scheduler bug behind fl…