DevInside Field Notes

ENGINEERING YOU CAN INSPECT

One investigation. A clearer next decision.

DevInside Field Notes is a short engineering letter by Marcin Borecki. The planned rhythm is one issue every two weeks: a failure mode, a practical example and the decision it changes.

The subjects connect AI workflows, software architecture, performance and data. You will find concrete mechanisms and worked examples, with a clear distinction between a local experiment, a hypothesis and a claim about production.

What a Field Note contains

• A question worth investigating: a lost response, a slow request, the wrong source or a decision that needs better evidence.
• A worked example: the relevant code, observation or diagram, with its limits explained.
• A useful next step: a lab to explore, a question for your team or a way to test the explanation in your own system.

A useful place to start

The Agent Reliability Field Guide brings together five questions about tool authority, retries, retrieval, approval and observable effects. It points to public labs that you can inspect without an email subscription.

Prefer a specific topic? Start with AI & Agents, Performance & Data or the Decision APIs course.

Have a question about a system your team is building? Explore ways to work with Marcin.