#automation
- 2026-10-07Sentinel: The Command PlaneWhere the system stops observing and becomes able to be wrong in ways that matter: desired and reported held as separate values, a durable claim set, banded arbitration, and a state machine that turns a fire-and-forget write into a verified outcome.23 min
- 2026-09-02Sentinel: An IntroductionA soil moisture sensor goes quiet for three days, and nothing in the system says so — a reading and a memory of one look identical. Deciding what that costs is what a specification is for, and this is the first of eleven parts publishing one in full, while the system it describes gets built.20 min