Architecture Tools for documenting and visualizing software architecture. Mermaid diagrams Generate Mermaid diagram syntax for rendering in Markdown or docs. Sequence diagram Architecture diagram (flowchart) Entity relationship diagram C4 Context (using flowchart) Architecture Decision Records (ADR) Write ADRs to using the standard template: List ADRs PlantUML (text-based) Dependency graph (from package.json) Notes - Mermaid renders natively in GitHub Markdown (use `mermaid code blocks). - ADRs should be numbered sequentially and never deleted (supersede instead). - Keep diagrams in version c…