The log

Every entry, newest first. One a week on systems, AI and the work of building software.

2026

  1. 010 · 2026-11-07What Makes Context Executable?The bank already knew Halden’s sector exposure. Then Credit Risk changed when it mattered. One policy edit, read by agents in two different harnesses, sent the same trade to committee.AI & engineering · 10 min
  2. 009 · 2026-11-04What Is a Context Layer?An agent answering a business question needs definitions, current data, permissions, and ways to act. A context layer brings those together for the task at hand.AI & engineering · 10 min
  3. 008 · 2026-10-28Building Confidence in Systems Written with AIHow we use formal verification, simulation, fuzzing, and performance tests to build evidence that our Rust services behave as intended.AI & engineering · 14 min

2025

  1. 007 · 2025-12-23The Option Surface Has ChangedAI reveals action paths that were always technically possible — but practically invisible.AI & engineering · 5 min
  2. 006 · 2025-12-17The Anti-AI Movement and the Myth of CraftsmanshipWhy Kitchen Purgatory is the real threat to software engineering, not the machines.AI & engineering · 3 min

2024

  1. 005 · 2024-10-31Sharing State in a Sequencer EnvironmentDiscussion on how to share state safely in a sequencer environment.Replication · 5 min
  2. 004 · 2024-02-04Read Heavy Aeron Cluster WorkloadsInvestigating the read consistency models supported by Aeron Cluster.Trading systems · 5 min
  3. 003 · 2024-01-28Increasing Replicated State Machine Throughput in Trading SystemsLooking at ways to increase the throughput of replicated state machines in trading systems.Trading systems · 11 min

2023

  1. 002 · 2023-12-31Can We Reduce Coordination in Cloud Trading Venues?Trying and failing to reduce the coordination overhead in cloud trading venues.Trading systems · 9 min

2020

  1. 001 · 2020-12-12State Machine Replication: A Brief HistoryA brief history of state machine replication.Replication · 4 min

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