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A short note, written the moment a big decision is made, explaining what was decided and why. That’s the whole idea behind an Architecture Decision Record. This guide unpacks the classic five-part template (title, status, context, decision, consequences), the ADR lifecycle (proposed → accepted → superseded → deprecated), a worked…
Long before a single line of code gets written, architects need a way to draw their ideas so other people can actually understand them. UML is the shared drawing language that lets an idea in one person’s head become a picture everyone else can read. This guide covers what UML…
Some questions aren’t about what a system is made of — they’re about what happens, in what order, when someone actually presses “buy now.” This guide unpacks sequence diagrams — the three core building blocks (lifelines, activation bars, messages), the different arrow styles and what they mean, combined fragments for…
Some systems are too big to draw one class at a time. A component diagram steps back, groups related code into sensible chunks, and shows how those chunks plug into each other. This guide unpacks the notation (lollipops, sockets, connectors, dependencies), how to read and draw one, how it compares…
Most people picture an architect drawing diagrams once, at the very start, and disappearing. In reality, a good architect’s fingerprints are on almost every stage of a project — from the first client conversation to years after launch. This guide walks phase by phase through the SDLC, showing what an…
A system isn’t judged by how elegant its diagrams look. It is judged by whether the people who depend on it — from the CEO to the person answering support tickets — actually get what they need. This guide unpacks how architects find every stakeholder who matters, use the power/interest…
Ask a room full of experienced architects which soft skill matters most, and the same answer keeps coming back: communication — not the talent for talking a lot, but the much rarer talent for making complicated ideas land clearly with very different people. This guide unpacks why communication outranks the…
You can’t have everything at once — not in a treehouse, not in a school timetable, and not in the software running your favourite apps. This guide explains architectural trade-offs — what they really are, why they’re unavoidable, the five building-block words (quality attribute, scenario, sensitivity point, trade-off point, risk),…
Every big app you use is built like a building — and just like buildings, software can be put together in very different ways. This guide walks through the main architectural styles engineers choose from — layered, client-server, microservices, event-driven, microkernel, SOA, plus pipe-and-filter, peer-to-peer, master-slave, space-based, serverless, and broker…
Every time you open an app and something appears on your screen a moment later, two very different computers just had a quiet conversation. This guide explains client-server architecture from the ground up — the two roles and the shared protocol between them, the four steps behind every request, the…