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0.0.5

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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.

Published16 Oct 2026
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README

Version 0.0.5 documentation

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: create_surface, update_components, update_data_model
  • RENDER_A2UI_TOOL_DEF — JSON schema for the inner structured-output tool
  • State + history helpers: build_context_prompt, find_prior_surface
  • Prompt composer: build_subagent_prompt
  • High-level orchestration: prepare_a2ui_request, build_a2ui_envelope
  • Output wrappers: assemble_ops, wrap_as_operations_envelope, wrap_error_envelope

See also

The TypeScript counterpart lives in @ag-ui/a2ui-toolkit and exposes the same surface in camelCase.

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