IDEAS, DECISIONS & LESSONS

Journal

Notes on AI, architecture and building useful products.

85 articles

31 Jul 2026 · 7 min read

ai-agents

Claude Opus 5 and the Shift to Agentic Engineering

Claude Opus 5 isn't just a better model — it changes the economics and architecture of AI agent systems. What the benchmarks actually mean for teams building production pipelines: configurable effort, self-verification, and the 'chief-of-staff' pattern.

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27 Jul 2026 · 8 min read

ai-agents

Why Software Factories Fail (and What Actually Works): A Tech Lead's Guide to the HumanLayer Series

Dex Horthy's two-part HumanLayer series lands on the same conclusion from opposite directions: 'lights-off' agentic factories that skip code review don't work, because RL training has no way to reward good architecture — only passing tests. The fix isn't less AI, it's front-loaded structure: research/plan/implement, frequent intentional compaction, and four review checkpoints before code gets written. Here's the synthesis and a rollout plan.

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21 Jul 2026 · 6 min read

ai-agents

Inside Claude Code's Multi-Agent Architecture: A Tech Lead's Implementation Guide

Single-agent coding assistants hit a context wall the moment a task spans more than one concern. Claude Code's answer is a Lead Agent coordinating Specialist Agents over a shared task system with hard context isolation — here's how the architecture works, and a concrete rollout plan for applying the same pattern to your team's workflows and your own projects.

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