Guides
16 guides on architecture. Practical writing from the team building Atlas, useful whether or not you buy anything.
An integration is a promise that two databases will agree. A unified data model removes the need for the promise. For tightly coupled work, that difference is the whole ballgame.
A single source of truth is not a master spreadsheet or a nightly sync. It is a state where each fact lives in exactly one place, and every view reads it.
An architecture firm delivers phased projects over months or years, on fees that are fixed early. Profitability depends on tracking effort against phase, and that requires one connected system.
The data model is the part of a platform you never see and cannot change later. Learning to evaluate it is the highest-leverage buyer skill.
Everyone claims a single source of truth. Almost no one has one, because it is a property of your data model, not a dashboard you can bolt on.
Caching is easy to add and hard to reason about: the bugs live in invalidation and the miss path. Diagramming the read and write flows makes cache-aside versus read-through a concrete choice, not a vibe.
A message queue decouples a producer from a consumer with a buffer in between, and the subtlety is all in the acknowledgements, retries, and dead letters. Diagramming them prevents lost and duplicated work.
Event-driven systems decouple who emits an event from who reacts to it, which is powerful and easy to lose track of. Diagramming the producers, topics, and consumers restores the map.
D2 is a newer diagram-as-code language designed for readability and good-looking output. This guide covers its clean syntax for shapes, connections, containers, and styling.
A component diagram shows the high-level building blocks of a system and how they plug together through interfaces. PlantUML makes one from components, interfaces, and connectors written as text.
When you want blocks in a deliberate grid rather than an auto-arranged graph, Mermaid's block-beta gives you column control, spanning widths, and nesting.
The C4 model describes software at four zoom levels, and Mermaid lets you write the top three as text: this guide covers the C4Context, C4Container, and C4Component syntax.
A good diagram in documentation replaces paragraphs of prose that nobody reads. The trick is choosing the right diagrams and keeping them honest as the software changes.
Deployment diagrams show where software actually runs: the physical nodes, the artifacts deployed on them, and the connections between them. This guide covers nodes, artifacts, and modern cloud topologies.
Component diagrams show how a system decomposes into replaceable parts and the interfaces they expose and consume. This guide covers components, ball-and-socket interfaces, ports, and dependencies.
Features are visible and easy to copy. The data model is invisible and nearly impossible to retrofit. That is exactly why it is the decision that matters most.
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