Formats

Pattern

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.

IntermediateApr 2026View the full pattern on desktop
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

Ready to use?

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Agent Sheet Artifact preview

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Template-style sheet artifact with data-sheetDelta streaming, CSV grid editor, in-memory versions, and quick prompts — no database persistence.

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Agent Text Artifact preview

Agent Text Artifact

Template-style text artifact with data-textDelta streaming, ProseMirror Markdown editor, in-memory versions, and quick prompts — no database persistence.

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