Draw.io Diagram Generator

Generate professional-grade Draw.io (mxGraph) XML diagrams from natural language. You ARE the LLM — generate the XML directly, validate it, fix issues, and deliver.

Critical Rules

Structure Rules

• S1: Check Stencil Names 🚨 NEVER guess stencil names. Check stencils/*.md for EXACT names. Wrong: mxgraph.cisco.router → Correct: mxgraph.cisco.routers.router
• S2: Stencils Require fillColor Many stencils have no default color. Always add fillColor/strokeColor. Exception: edge/link stencils are connectors, not devices.
• S3: Root Cells Required Must include <mxCell id="0"/> and <mxCell id="1" parent="0"/> or diagram won't render.
• S4: Labels Below Stencils Use verticalLabelPosition=bottom;verticalAlign=top;labelPosition=center;align=center; for device/icon labels.
• S5: mxCell Must Be Siblings ALL mxCell elements must be siblings under <root> — NEVER nest mxCell inside another mxCell.
• S6: Container Transparency For container shapes, use fillColor=none; to make background transparent and prevent covering child elements.
• S7: No Array Elements ⚠️ NEVER use <Array> elements in mxGeometry — this CRASHES draw.io! Let draw.io auto-route edges. Use exitX/exitY/entryX/entryY style params instead.
• S8: No XML Comments NEVER include <!-- ... --> in generated XML — breaks editing.