System Architecture Diagrams in Confluence with Mermaid C4
The onboarding doc says "check the architecture diagram" and the architecture diagram shows a monolith from 2023 that the team decommissioned in the spring. Nobody is lying — the draw.io file lives on one person's laptop, and the wiki holds a screenshot nobody owns. An architecture that only exists as a static export rots silently, because the thing you would edit is invisible to review.
Quick answer: document system architecture in Confluence as Mermaid text — C4Context for the system in context, architecture-beta for the deployment, block-beta for the topology you want laid out precisely — rendered by Mermaid Plus Diagrams & AI Agent for Confluence. Every level stays an editable code block, so the wiki's architecture changes in the same review that changes the system. This post gives you three copy-paste examples.