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Notes from production.

On platform design, contracts between systems, governed AI, and what production teaches that a design review does not.

3 notes published. Each one comes out of an engagement.

  • Platforms · 2 min read

    Event contracts between bounded contexts

    Two teams agree on a payload, ship, and discover six months later that they never agreed on what it meant. The schema was never the contract.

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  • Governed AI · 2 min read

    A model inherits every obligation your data already had

    Adding an AI feature does not create a new compliance regime. It moves personal data into a component that is harder to inspect, and the duties travel with it.

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  • Production · 2 min read

    Runbooks that survive a reorganisation

    Operational documentation is usually written for the person who already knows. Write it for the third reader instead — the one who arrives at 03:00, eighteen months from now.

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