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PatternsArtifacts
Agent Code Artifact
Agent Code Artifact
Template-style code artifact with data-codeDelta streaming, CodeMirror Python editor, Pyodide run, in-memory versions, and quick prompts — no database persistence.
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Problems solved
Technical challenges this implementation handles out of the box.
- Stream Python code updates with data-codeDelta UI parts
- Edit code in a CodeMirror editor with Pyodide run support
- Keep code versions in memory without database persistence
- Update the artifact from agent tools and quick prompts
Use cases
Products and workflows this pattern is designed to support.
- Python coding copilots in chat
- Runnable notebook-style demos
- Teaching code artifacts with Pyodide
- In-browser code editors for agents
Setup
Requirements, wiring steps, and what this pattern adds to your project.
Getting started
Pick how you want to pull this pattern in. Then wire env vars and routes the same way.
- 1
Install from the preview toolbar
Copy the install command above and run it in your project — Pro patterns include a short-lived token.
- 2
Add environment variables to .env.local
AI_GATEWAY_API_KEY
- 3
Point client fetches at your API routes
Replace preview `/view/.../api/...` paths with `/api/...` in the installed files.
- 4
Customize the agent and tool files
Adapt prompts, tools, and stop conditions for your product — Copy for AI in the toolbar helps seed that work.
- 5
Run your dev server and open the pattern route
Install dependencies if needed, then start the app and verify responses.
Environment variables
AI_GATEWAY_API_KEYGet key
Capabilities
AI SDK APIs
streamTextcreateUIMessageStreamgatewaytoolProviders
OpenAI
External services
Upstash
Files added
19 filesapp/page.tsxapp/layout.tsxapp/api/agent-code-artifact/route.tscomponents/agent-code-demo.tsxcomponents/code-artifact-tool.tsxcomponents/code-artifact-panel.tsxcomponents/code-editor.tsxcomponents/console.tsxcomponents/data-stream-provider.tsxcomponents/data-stream-handler.tsxcomponents/empty-state.tsxhooks/use-artifact.tsxlib/types.tslib/create-artifact.tslib/code-artifact.tsxlib/artifacts.tslib/rate-limit.tslib/request-utils.tsREADME.md
Dependencies
18 totalnpm packages
14AISDK@codemirror/lang-python@codemirror/state@codemirror/theme-one-dark@codemirror/viewUpstashcodemirrordate-fnslucide-reactNext.jsReactsonnerusehooks-tsZod
Registry components
buttondraweremptytooltip
Critical files
lib/code-artifact.tsxDefines codeArtifact with onStreamPart for data-codeDelta, CodeMirror content, Pyodide Run, and toolbar actions.
agent-code-artifact/route.tscreateUIMessageStream merges streamText with updateCodeDocument tool; emits data-id, data-title, data-kind, data-codeDelta, data-finish.
Requirements
- Complexity
- Intermediate
- Setup time
- ~8 minutes
- Node
- 24+
- Memory
- 256MB
Upstash Redis
