Lessons from the Terminal

Twice-weekly field notes on infrastructure, AI, and systems.

What I built, what broke, and the evidence that changed the next decision.

Jun 2026 Operations

The Maintenance Window Is Part of the Design

A maintenance window isn’t merely a polite time to make a change. It is a finite engineering resource. The design has to fit inside it with room for observation, correction, and retreat. When the change plan consumes the whole window on paper, the failure has already started; the clock just hasn’...

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