System NotesXendai / Technical publication

Ideas, decisions and lessons from building AI systems.

We write about designing, building and operating AI inside real businesses: architecture, agents, automation, knowledge, models, evaluation and operations.

Notes from the system.

Field notes from building systems — not weekly AI news, prompt lists or model summaries on a schedule.

Further notes.

Pedro Trillo

Automating a task is not automating a process

Automation can accelerate an activity while leaving the waits, reviews, and handoffs that constrain its outcome unchanged. This Note explains why processes need state, acceptance conditions, and responsibility, and how to recognize improvement without automating everything.

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Pedro Trillo

Where an agent's autonomy should end

An agent's autonomy is a delegation with conditions. This Note examines consequences, effective permissions, meaningful human review, and revocation to explain where that delegation should end and what evidence can justify extending it.

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Pedro Trillo

Why production changes the problem

Production begins when someone depends on a system for real work. This Note examines the service commitment that follows, from dependencies and traceable changes to continuity and ownership, with engineering rigor proportionate to the dependency created.

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