graphviz
Graphviz DOT Diagram Generator
Important: Use
```dotas the code fence identifier, NOT```graphviz.
Quick Start: Choose digraph (directed) or graph (undirected) → Define nodes with attributes (shape, color, label) → Connect with -> or -- → Set layout (rankdir, spacing) → Wrap in ```dot fence. Default: top-to-bottom (rankdir=TB), cluster names must start with cluster_, use semicolons.
Critical Syntax Rules
Rule 1: Cluster Naming
❌ subgraph backend { } → Won't render as box
✅ subgraph cluster_backend { } → Must start with cluster_
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