* Changes
* Fix ChatClientAgent streaming responses missing MessageId
Generate fallback MessageId in ChatClientAgent.RunCoreStreamingAsync when
the underlying LLM provider does not set ChatResponseUpdate.MessageId.
Without a MessageId the AGUI converter's null==null check silently drops
all text content, causing CopilotKit Zod validation errors.
Changes:
- ChatClientAgent: generate msg_{Guid} fallback via ??= in streaming loop
- AgentResponseExtensions: sync wrapper MessageId back to RawRepresentation
in AsChatResponseUpdate() so downstream consumers see the value
- Add unit tests for both fixes and AGUI streaming MessageId scenarios
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
* Address PR #4615 review comments
- Fix MessageId seeding: use first-seen provider MessageId (or generate
fallback) and apply consistently to all chunks in the stream, preventing
message splitting when providers set MessageId only on the first chunk
- Add test for mixed MessageId scenario (first chunk only)
- Fix skipped TextStreaming test: assert Empty (not NotEmpty) to match
actual null==null behavior
- Fix skipped ToolCalls test: assert empty ParentMessageId to match
actual empty-string passthrough behavior
* Handle empty MessageId in AsChatResponseUpdate sync
Treat empty/whitespace MessageId the same as null when syncing from
the AgentResponseUpdate wrapper back to RawRepresentation. Providers
that return empty string MessageId (e.g. tool call responses) now get
the wrapper value recovered correctly.
Add test for empty string MessageId recovery scenario.
* Move MessageId fallback generation to AGUI layer
Move fallback MessageId generation from ChatClientAgent to
AsAGUIEventStreamAsync, addressing the architectural concern that
MessageId is nullable in the AIAgent abstraction and the requirement
for non-null values is specific to the AGUI protocol.
The AGUI layer now generates a fallback MessageId for null or
empty/whitespace values, covering all agent types (not just
ChatClientAgent) including external implementations.
Changes:
- Revert MessageId generation from ChatClientAgent.RunCoreStreamingAsync
- Add fallback MessageId generation in AsAGUIEventStreamAsync for
null/empty MessageId values (handles both null and whitespace)
- Unskip and update AGUI tests to verify fallback generation
- Update ChatClientAgent tests to reflect passthrough behavior
* Revert AsChatResponseUpdate MessageId sync-back
Remove the MessageId sync-back logic from AsChatResponseUpdate() as it
is no longer needed. With fallback generation moved to the AGUI layer,
the abstraction layer should not mutate the RawRepresentation object.
Revert to the original passthrough behavior for AsChatResponseUpdate()
and update tests accordingly.
---------
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
* Persist messages during the Function Call Loop
* Revert version reset
* Fix bugs and improve sample
* Fix formatting issues
* Also updating conversation id during run
* Update based on ADR feedback
* .NET: [BREAKING] Add session statebag to use for state storage instead of inside providers (#3737)
* Add a StateBag to AgentSession and pass Agent and AgentSession to AIContextProvider and ChatHistoryProviders
* Convert all AIContextProviders to use the statebag
* Update InMemoryChatHistoryProvider to use StateBag
* Update Comsos and Workflow ChatHistoryProviders
* Update 3rd party chat history storage sample.
* Remove serialize method from providers
* Replacing provider factories with properties
* Remove Providers from Session and flatten state bag serialization
* Update samples to use getservice on agent
* Updated additional session types to serialize statebag
* Fix regression
* Address PR comments
* Address PR comments.
* Fix formatting
* Fix unit tests
* Remove InMemoryAgentSession since it is not required anymore.
* Address PR comments
* Convert sessions for A2AAgent, ChatClientAgent, CopilotStudioAgent and GithubCopilotAgent to use regular json serialization.
* Fix durable agent session jso usgae
* Add jso to InMemory and Workflow ChatHistoryProviders
* Update InMemoryChatHistoryProvider to use an options class for it's many optional settings.
* Apply suggestions from code review
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
* Address PR feedback
* Fix verification bug.
* Improve state bag thread safety
* Address PR comments and fix unit tests
* Address PR comments
* Fix unit test
---------
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
* Add a public StateKey property to providers (#3810)
* .NET: [BREAKING] Update providers in such a way that they can participate in a pipeline (#3846)
* Make providers pipeline capable
* Fix unit tests
* Move source stamping to providers from base class
* Also update samples.
* Address PR comments
* Rename AsAgentRequestMessageSourcedMessage to WithAgentRequestMessageSource
* .NET: [BREAKING] Add consistent message filtering to all providers. (#3851)
* Add consistent message filtering to all providers.
* Remove old chat history filtering classes
* Fix merge issues
* Fix unit test
* Enforce non-nullable property
* Fix merging bug and make troubleshooting source info easier by adding tostring implementation
* .NET: [BREAKING] Add support for multiple AIContextProviders on a ChatClientAgent (#3863)
* Add support for multiple AIContextProviders on a ChatClientAgent
* Address PR comments and fix tests
* Address PR comments.
* .NET: [BREAKING]Delay AIContext Materialization until the end of the pipeline is reached. (#3883)
* Delay AIContext Materialization until the end of the pipeline is reached.
* Address PR comments.
* Address PR comments
* Modify InvokedContext to be immutable (#3888)
* .NET: Address Feedback on StateBag feature branch PR (#3910)
* Address Feedback on statebag feature branch PR
* Update dotnet/src/Microsoft.Agents.AI.DurableTask/CHANGELOG.md
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
* Address PR comments
---------
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
---------
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
RunCoreStreamingAsync was passing inputMessagesForProviders (which lacks
chat history) to GetStreamingResponseAsync instead of
inputMessagesForChatClient (which includes chat history). This caused
streaming runs to lose conversation context on subsequent calls.
The non-streaming path (RunCoreAsync) already correctly used
inputMessagesForChatClient. This aligns the streaming path to match.
Also adds a unit test that validates chat history is included in
messages sent to the chat client during streaming on subsequent calls.
Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: lokitoth <6936551+lokitoth@users.noreply.github.com>
* Add ability to mark the source of Agent request messages and use that for filtering
* Add support for source, in addition to source type, and add unit tests for automatic stamping
* Address PR comments.
* Add merge fixes
* Address PR comments
* Add a StateBag to AgentSession and pass Agent and AgentSession to AIContextProvider and ChatHistoryProviders
* Remove statebag code from this branch, to get the refactoring out of the way first
* Apply suggestion from @rogerbarreto
Co-authored-by: Roger Barreto <19890735+rogerbarreto@users.noreply.github.com>
* Apply suggestion from @westey-m
* Apply suggestion from @westey-m
---------
Co-authored-by: Roger Barreto <19890735+rogerbarreto@users.noreply.github.com>
* save input messages and stream updates to the continuation token to be able to use them in the last successful stream resumption call.
* Update dotnet/src/Microsoft.Agents.AI/ChatClient/ChatClientAgentContinuationToken.cs
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
* Update dotnet/src/Microsoft.Agents.AI/ChatClient/ChatClientAgentContinuationToken.cs
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
* Update dotnet/tests/Microsoft.Agents.AI.UnitTests/ChatClient/ChatClientAgent_BackgroundResponsesTests.cs
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
* Update dotnet/src/Microsoft.Agents.AI/ChatClient/ChatClientAgentContinuationToken.cs
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
* Update dotnet/src/Microsoft.Agents.AI/ChatClient/ChatClientAgentContinuationToken.cs
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
* fix typo
* init continuation token from chat response
* remove unnecessary types for source generation
* remove check for continuation token passed at initial run
* remove check for continuation token pass at initial run
* centralize continuation token parsing
* update xml comments
* use readonly collection instead of enumerable
---------
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
* Refactor ChatMessageStore methods to be similar to AIContextProvider
* Fix file encoding
* Ensure that AIContextProvider messages area also persisted.
* Update formatting and seal context classes
* Improve formatting
* Remove optional messages from constructor and add unit test
* Add ChatMessageStore filtering via a decorator
* Update sample and cosmos message store to store AIContextProvider messages in right order. Fix unit tests.
* Update Workflowmessage store to use aicontext provider messages.
* Apply suggestions from code review
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
* Apply suggestions from code review
Co-authored-by: SergeyMenshykh <68852919+SergeyMenshykh@users.noreply.github.com>
* Improve xml docs messaging
* Address code review comments.
* Also notify message store on failure
---------
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
Co-authored-by: SergeyMenshykh <68852919+SergeyMenshykh@users.noreply.github.com>
* prevent stremed updates loss when resuming streaming with non-agent managed store or/and context provider
* Update dotnet/src/Microsoft.Agents.AI/ChatClient/ChatClientAgent.cs
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
* throw not supported exception instead invalid operation
* Update dotnet/src/Microsoft.Agents.AI/ChatClient/ChatClientAgent.cs
Co-authored-by: westey <164392973+westey-m@users.noreply.github.com>
* Update dotnet/src/Microsoft.Agents.AI/ChatClient/ChatClientAgent.cs
Co-authored-by: westey <164392973+westey-m@users.noreply.github.com>
* use conversation id to check if chat history is managed by agent service or not
* extract background responses tests into a separate file
---------
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
Co-authored-by: westey <164392973+westey-m@users.noreply.github.com>
* Fix issue where AIContextProvider messages were not added to MessageStores
* Fix typos
* Update XML docs to reduce ambiguity.
* Update AIContext XML docs
* Fix merge issue
* unit test for using create agent option by constructor
* remove this for prevent duplicate when ChatClientAgentOption and ChatOption has same Instruction
* update unit test for ChatClientAgentOptions
* improve structured output for chat client agent
* add comment to the result property
* remove code duplication and add tests
* refactor the CreateAIAgent extension methods to return specific types, so consumers can avoid unnecessary downcasting.
* fix type and remove unused using.
* add ChatClientAgentRunResponse and move AgentRunResponse to the abstractions package to reuse later.
* seal ChatClientAgentRunResponse
* update xml comment
* remove funcitons from sample
* rename agent for streaming
* Fix bug where ChatClientAgent throws when providing a ChatMessageStore with a service that requries service storage
* Update dotnet/tests/Microsoft.Agents.AI.UnitTests/ChatClient/ChatClientAgentTests.cs
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
---------
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
* Make serialize methods sync and rename one to match others.
* Remove unnecessary async postfixes.
* Remove nullability of ChatMessageStore.Serialize return type, since the default JsonElement already represents an undefined json element.
* Fix unit test
* Rename AI Agent packages to use Microsoft.Agents.AI
* Fix for build
* Fix formatting
* Fix formatting
* Ignore in VSTHRD200 in migration samples
* Ignore in VSTHRD200 in migration samples
* Add some missing projects and run format
* Fix build errors
* Address code review feedback
* Fix merge issues
---------
Co-authored-by: Mark Wallace <markwallace@microsoft.com>