Framework-agnostic helpers for building A2UI subagent tools — op builders, prompt assembly, history walkers, and request/envelope orchestration shared across framework adapters.
Project description
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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