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@ag-ui/a2ui-toolkit
Advanced tools
@ag-ui/a2ui-toolkit
Framework-agnostic helpers for building A2UI subagent tools — op builders, prompt assembly, history walkers, and request/envelope orchestration shared across framework adapters.
@ag-ui/a2ui-toolkit
Framework-agnostic helpers for building A2UI subagent tools.
Each per-framework adapter (LangGraph, ADK, Mastra, …) composes these helpers with its own framework-specific glue: tool decorator, runtime accessor, model binding + invoke. Nothing in this package depends on any agent framework.
Surface
- Constants:
A2UI_OPERATIONS_KEY,BASIC_CATALOG_ID,DEFAULT_SURFACE_ID,GENERATE_A2UI_TOOL_NAME,GENERATE_A2UI_TOOL_DESCRIPTION,GENERATE_A2UI_ARG_DESCRIPTIONS - Op builders:
createSurface,updateComponents,updateDataModel RENDER_A2UI_TOOL_DEF— JSON schema for the inner structured-output tool- State + history helpers:
buildContextPrompt,findPriorSurface - Prompt composer:
buildSubagentPrompt - High-level orchestration:
prepareA2UIRequest,buildA2UIEnvelope - Output wrappers:
assembleOps,wrapAsOperationsEnvelope,wrapErrorEnvelope
See also
The Python counterpart lives in
ag-ui-a2ui-toolkit and exposes the same
surface in snake_case.
FAQs
Framework-agnostic helpers for building A2UI subagent tools — op builders, prompt assembly, history walkers, and request/envelope orchestration shared across framework adapters.
The npm package @ag-ui/a2ui-toolkit receives a total of 345,365 weekly downloads. As such, @ag-ui/a2ui-toolkit popularity was classified as popular.
We found that @ag-ui/a2ui-toolkit demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 2 open source maintainers collaborating on the project.
Package last updated on 17 Jun 2026
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