Request Processing Units and Reactors

Decoupling User Interactions from Internal Domain Capabilities

Functional Core / Imperative Shell for Agentic Coding

How Repository Structure, Feature Slices, and Project-Level Skills Guide Coding Agents Toward Self-Contained Features

Building a Road Network from OSM: Roads, Segments, and Directed Edges

A practical look at how a routing graph emerges from OSM nodes and ways

Building a Routing Graph from OSM: Transition Constraints and Path Constraints

Why a road network needs explicit constraints, not just nodes and edges

Road Networks Are Execution Models, Not Stored Geometry

On semantics, projection, and the architectural difference between stored geometry and executable movement constraints

OpenStreetMap Is Not a Routing Model And Treating It Like One Is Expensive

The structural misalignment between OSM’s flexibility and the deterministic demands of production routing systems.

When Reuse Breaks Decoupling

Why self-contained feature slices collapse the moment we start orchestrating them

Why Simple Changes Rarely Stay Simple

How software systems become resistant to simple change

Building a Durable Telemetry Ingestion Pipeline with Rust and NATS JetStream

Why Direct-to-Database Ingestion Fails at Scale and What Actually Works