fix(dotnet): surface run errors as error content#2189
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Install with uvAdd the TestPyPI index to your [[tool.uv.index]]
name = "testpypi"
url = "https://test.pypi.org/simple/"
explicit = trueThen install the packages you need: # Core SDK
uv add 'ag-ui-protocol==0.0.0.dev1784049642' --index testpypi
# Integrations (each already depends on the matching ag-ui-protocol preview)
uv add 'ag-ui-langgraph==0.0.0.dev1784049642' --index testpypi
uv add 'ag-ui-crewai==0.0.0.dev1784049642' --index testpypi
# NOTE: ag-ui-agent-spec depends on pyagentspec (git-only, not on PyPI).
# You will need to install pyagentspec separately from its git repo.
uv add 'ag-ui-agent-spec==0.0.0.dev1784049642' --index testpypi
uv add 'ag_ui_adk==0.0.0.dev1784049642' --index testpypi
uv add 'ag_ui_strands==0.0.0.dev1784049642' --index testpypiInstall with pippip install \
--index-url https://test.pypi.org/simple/ \
--extra-index-url https://pypi.org/simple/ \
ag-ui-protocol==0.0.0.dev1784049642
Commit: d518a5c |
@ag-ui/a2a-middleware
@ag-ui/a2ui-middleware
@ag-ui/event-throttle-middleware
@ag-ui/mcp-apps-middleware
@ag-ui/mcp-middleware
@ag-ui/a2a
@ag-ui/adk
@ag-ui/ag2
@ag-ui/agno
@ag-ui/aws-strands
@ag-ui/claude-agent-sdk
@ag-ui/crewai
@ag-ui/langchain
@ag-ui/langgraph
@ag-ui/llamaindex
@ag-ui/mastra
@ag-ui/pydantic-ai
@ag-ui/vercel-ai-sdk
@ag-ui/watsonx
@ag-ui/a2ui-toolkit
create-ag-ui-app
@ag-ui/client
@ag-ui/core
@ag-ui/encoder
@ag-ui/proto
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approved these changes
Jul 15, 2026
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Previously,
AGUIChatClienthandledRunErrorEventby throwing anInvalidOperationException.This exposed the error message but discarded the structured error code and prevented callers from handling the failure through the normal
Microsoft.Extensions.AIcontent pipeline.This change surfaces
RunErrorEventas aChatResponseUpdatecontainingErrorContent:RunErrorEvent.Messagemaps toErrorContent.MessageRunErrorEvent.Codemaps toErrorContent.ErrorCodeRunErrorEventthroughRawRepresentationRUN_ERRORremains terminal, so subsequent events are rejectedThis matches the behavior provided by
Microsoft.Agents.AI.AGUI, making it easier for users to migrate without changing their existing structured error handling.Unit tests, cross-language coverage, fixture comments, and architecture documentation have been updated to reflect the new behavior.
Fixes #2187