Blog
Thoughts on software engineering, systems design, and the craft of building things.
Series
Delete It and See
Boris Cherny's advice is to delete your CLAUDE.md, skills, and hooks every six months and see what the model does. These posts are what it took to answer that in a toolkit of forty-odd skills: the evals I didn't have, the ablations I ran once I had them, and what they measured.
The Model Ladder
Getting cheap models to do the gathering and expensive ones to do the deciding: why a CLAUDE.md instruction wasn't enough to make that happen, and the fan-out pattern that was.
2026
- Noted the Skip, Ticked the Box
- Hallucination and Sycophancy Are the Same Bug
- The Ablation I Haven't Run
- What CDK Aspects Reach That Props Can't
- The Agent Ladder: Fan Out by Model Tier
- Multi-model delegation in Claude Code
- What AI Coding Agents Actually Cost
- Building andrewchemis.dev
- Why Infrastructure as Code Matters
- Hello, World