Formats
Pattern
INT·Apr 26

Agent Mermaid Artifact

Template-style Mermaid artifact with data-mermaidDelta streaming, diagram preview and source editor, SVG/PNG export, in-memory versions, and quick prompts — no database persistence.

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Agent Mermaid Artifact preview

Problems Solved

  • Stream Mermaid diagram JSON with custom UI data parts
  • Template-style Artifact class without a full chat backend

Use Cases

  • Onboarding and architecture explanations
  • Demos without database wiring

AI SDK APIs

streamTextcreateUIMessageStreamgatewaytool

Tags

aimermaiddiagramarchitecturestreamingai-sdkartifacts

Requirements

Node.js
24+
Memory
256MB
Other
  • Vercel AI Gateway API key

Environment Variables

External Services

openaiupstash

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End of Pattern