devinside.Marcin Borecki Ideas. Systems. Evidence.

THE READING ROOM

Writing & investigations.

Engineering

Migrating Agent Behavior, Not Just SDK Calls

A migration can compile successfully, pass a demonstration and still change the behavior that made an agent useful. The new implementation may choose different tools, forget state at a different boundary or retry an operation that the old implementation treated as terminal.

18 min read

Engineering

Following the Cost of One Task Through Azure

A reproducible C# allocation model separates source records, shared-resource policy and unresolved attribution. Synthetic units make conservation and rounding testable without claiming live cloud costs.

16 min read

Engineering

An Observable .NET10 Service Before the First Incident

The first incident is a poor time to discover that the most important part of an operation is invisible. The HTTP request looks healthy. The queue accepted a message. The worker emitted a few logs. The customer still did not receive the result.

18 min read