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Community / AGENT SKILL
graphviz
0
Create directed/undirected graphs using DOT language with automatic layout. Best for dependency trees, call graphs, package hierarchies, and module relationships requiring fine-grained edge routing.
Understand the trade-offs.
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The full skill.
Original instructions from the publisher’s SKILL.md
# Graphviz DOT Diagram Generator
> **Important:** Use ` ```dot ` as 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_
```
### Rule 2: Node IDs with Spaces
```
❌ API Gateway [label="API"]; → Invalid ID
✅ "API Gateway" [label="API"]; → Quote the ID
✅ api_gateway [label="API Gateway"]; → Use underscore ID
```
### Rule 3: Edge Syntax Difference
```
digraph: A -> B; → Directed arrow
graph: A -- B; → Undirected line
```
### Rule 4: Attribute Syntax
```
❌ node [shape=box color=red] → Missing comma
✅ node [shape=box, color=red]; → Comma separated
```
### Rule 5: HTML Labels
```
✅ shape=plaintext for HTML labels
✅ Use < > not " " for HTML content
```
---
## Common Pitfalls
| Issue | Solution |
|-------|----------|
| Nodes overlapping | Increase `nodesep` and `ranksep` |
| Poor layout | Change `rankdir` or add `{rank=same}` |
| Edges crossing | Use `splines=ortho` or adjust node order |
| Cluster not showing | Name must start with `cluster_` |
| Label not displaying | Check quote escaping |
---
## Output Format
````markdown
```dot
digraph G {
[diagram code]
}
```
````
---
## Related Files
> For advanced layout control and complex styling, refer to references below:
- [syntax.md](references/syntax.md) — Layout control (rankdir, splines, rank), HTML labels, edge styles, cluster subgraphs, and record-based nodes