11 Commits

• feat: WorkflowHostAgent forwards AgentResponseEvent unconditionally under Futures-on

  Aligns the .NET Workflow-as-Agent surface with Python `as_agent`. Under
  `Futures.EnableAgentResponseOutputTaggingAndFiltering = true`,
  `WorkflowSession.InvokeStageAsync` now forwards `AgentResponseEvent`
  unconditionally — joining `AgentResponseUpdateEvent` in ignoring the host's
  `includeWorkflowOutputsInResponse` switch. That switch keeps governing the
  generic `WorkflowOutputEvent` path for non-AIAgent payloads, where it is
  further short-circuited by an `IsIntermediate()` check (tagged intermediate
  outputs always surface).
  
  Under Futures-off the legacy asymmetry is preserved: `AgentResponseUpdateEvent`
  always forwarded, `AgentResponseEvent` gated by `includeWorkflowOutputsInResponse`.
  
  Back-compat: with `Futures.EnableAgentResponseOutputTaggingAndFiltering` left at
  its default `false`, observable behavior is identical to before.
  
  `Futures` documentation gains a remark explaining the `Workflow.AsAIAgent()`
  interaction in both flag states.
  
  Runner fix
  ----------
  `InProcessRunnerContext.YieldOutputAsync` now skips `Executor.CanOutput` for
  AgentResponse-shaped payloads under both Futures branches. `AIAgentHostExecutor`
  doesn't declare AgentResponse(Update) in its `Yields` set, so the historical
  legacy bypass had silently skipped the check; Phase 3's Futures-on path was
  running it and would reject AIAgent payloads. AIAgent-shaped payloads are now
  always a valid output shape, matching the legacy bypass semantics.
  
  Phase 4 follow-on
  -----------------
  Switched the three orchestration-builder designation-replay loops to iterate
  `Dictionary.Keys` with a value lookup instead of constructing/destructuring
  `KeyValuePair<,>`. Cleaner shape and avoids the netstandard2.0 / net472
  `KeyValuePair<,>.Deconstruct` unavailability that surfaced when this branch
  multi-TFM-built.
  
  Tests
  -----
  `WorkflowHostSmokeTests.IntermediateForwarding` (new nested class, 6 tests):
  - intermediate AgentResponse forwarded past the include-outputs gate (Futures on)
  - terminal AgentResponse forwarded unconditionally (Futures on)
  - terminal AgentResponse gated by include flag (Futures off, legacy)
  - undesignated AIAgent executor emits no AgentResponseEvent under Futures-on
  - legacy bypass still emits AgentResponseEvent under Futures-off
  - intermediate tag is observable via `update.RawRepresentation`
  
  The class joins the `FuturesSerial` xUnit collection so the process-global flag
  is serialized against other Futures-toggling tests.
  
  599/599 unit tests pass on net10.0 (593 baseline + 6 new).
  
  Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

  Jacob Alber · 2026-05-28 16:44:08 -04:00
  508aeefb6b
• .NET: Hosting updates to declarative workflows (#5589)

  * Make DeclarativeWorkflowExecutor ChatProtocol-compatible for AsAIAgent hosting
  
  Extends the existing DeclarativeWorkflowExecutor<TInput> root executor with
  additional ChatProtocol-compatible input routes (string, ChatMessage,
  IEnumerable<ChatMessage>, ChatMessage[], TurnToken) so that workflows built
  via DeclarativeWorkflowBuilder.Build<TInput>(...) work both for direct
  invocation and when hosted via Workflow.AsAIAgent(...).
  
  - Each input message advances the declarative graph immediately; the
    TurnToken that the host sends after the message batch is treated as a
    no-op since the message has already been processed.
  - Conversation id resolution now prefers persisted workflow system state,
    then DeclarativeWorkflowOptions.ConversationId, then a newly created
    conversation. This makes multi-turn invocations reuse the prior
    conversation rather than creating a fresh one each turn.
  - The separate DeclarativeChatProtocolStartExecutor and
    DeclarativeWorkflowBuilder.BuildChatProtocol overloads introduced
    earlier are removed; callers continue to use Build<TInput>(...).
  
  Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
  
  * fix: use DeclarativeWorkflowContext when reading workflow conversation id
  
  GetWorkflowConversation() requires a DeclarativeWorkflowContext (it calls ReadState which dynamic-casts via the DeclarativeContext helper). The chat-protocol auxiliary handlers receive a BoundWorkflowContext, so calling the extension on the raw IWorkflowContext throws `Invalid workflow context: BoundWorkflowContext`. Use the wrapped declarativeContext that we already constructed.
  
  Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
  
  * fix: surface ExecutorFailedEvent as ErrorContent in AsAIAgent response
  
  WorkflowSession.InvokeStageAsync only converted WorkflowErrorEvent into an ErrorContent payload. ExecutorFailedEvent fell through to the default branch which emits an empty AgentResponseUpdate carrying the event in RawRepresentation. OutputConverter then mapped that to a workflow_action item with status=failed and dropped the exception entirely, so callers got status=completed and error=null even when an executor threw.
  
  - WorkflowSession.cs: add ExecutorFailedEvent case mirroring WorkflowErrorEvent. Honors _includeExceptionDetails.
  
  - OutputConverter.cs: when an update carries both a WorkflowEvent in RawRepresentation and non-empty Contents, fall through to content processing so the unwrapped error (or any future content payload from a workflow event) is actually emitted.
  
  Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
  
  * improve: walk inner exceptions when surfacing ExecutorFailedEvent
  
  DeclarativeActionExecutor wraps inner exceptions in DeclarativeActionException with a generic `Unhandled workflow failure` message, hiding the real cause. Walk InnerException so the response shows the full chain (e.g. the underlying HTTP 400 / auth error).
  
  Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
  
  * Surface declarative SendActivity output as chat content
  
  SendActivityExecutor now emits AgentResponseEvent in addition to
  MessageActivityEvent so chat protocols (e.g. AsAIAgent) receive the
  formatted activity text. The existing MessageActivityEvent is preserved
  for DevUI/observability.
  
  Also extend WorkflowSession.WorkflowOutputEvent handling to accept
  AgentResponse payloads, mapping them to their constituent ChatMessages.
  
  Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
  
  * Persist hosted-agent sessions to disk; fix System.LastMessageText
  
  Adds FileSystemAgentSessionStore that writes the serialized AgentSession JSON
  
  (which already embeds the workflow's in-memory checkpoint manager) to a per-
  
  conversation file under /.checkpoints when running in a Foundry hosted env
  
  or {cwd}/.checkpoints locally. Mirrors the python foundry_hosting._responses
  
  FileCheckpointStorage pattern so multi-turn workflow state survives process
  
  restarts without requiring callers to wire up storage themselves.
  
  AddFoundryResponses now defaults to FileSystemAgentSessionStore.CreateDefault()
  
  instead of InMemoryAgentSessionStore; callers can still override via DI.
  
  Also fixes {System.LastMessageText} resolving empty: DeclarativeWorkflowExecutor
  
  .AdvanceAsync was passing the message rehydrated from CreateMessageAsync to
  
  SetLastMessageAsync, but ResponseItem -> ChatMessage round-trip drops the .Text
  
  extension content. Use the original input ChatMessage (which still has the
  
  user-supplied text) and copy the server-assigned MessageId across when present.
  
  Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
  
  * Close multi-modal input parity gaps with python foundry_hosting
  
  InputConverter now mirrors the python _responses.py content handling:
  
  - ComputerScreenshotContent maps to UriContent/HostedFileContent (was dropped).
  
  - Plain TextContent and SummaryTextContent map to MEAI TextContent.
  
  - MessageContentReasoningTextContent maps to MEAI TextReasoningContent.
  
  - input_file with text/* file_data data URIs is decoded inline into
  
    TextContent with a [File: name] prefix, matching python _convert_file_data
  
    so {System.LastMessageText} surfaces the file body. Non-text data URIs and
  
    hosted/url file references preserve filename as AdditionalProperties.
  
  Image/file extraction logic is extracted into shared AppendImageContent and
  
  AppendFileContent helpers used by both the fresh-input and history-replay
  
  switches. Existing 37 InputConverter tests still pass.
  
  Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
  
  * Foundry hosting: round-trip tool-approval (HITL) content as mcp_approval_request/response
  
  Closes the gap where Microsoft.Agents.AI.Foundry.Hosting silently dropped
  MEAI ToolApprovalRequestContent/ToolApprovalResponseContent in both
  directions. We now serialize them onto the wire as the standard Responses
  API mcp_approval_request/mcp_approval_response items with
  server_label='agent_framework', and parse the symmetric inbound shapes
  back into MEAI content.
  
  Wire format:
  - The Responses API only standardizes mcp_approval_* as the approval
    primitive. We declare AF as a virtual MCP server via the server_label
    field, which is honest for AF's server-side tool-call holding pattern.
  - The SDK enforces a strict {prefix}_{50hex} wire-id format, so we hash
    the AF RequestId and persist a wireId<->afRequestId mapping in
    AgentSession.StateBag so a later mcp_approval_response can be matched
    back to the originating workflow request.
  
  Coexists with the existing ConsentAwareMcpClientAIFunction flow
  (AgentFrameworkResponseHandler.cs) which emits mcp_approval_request from
  a side-channel, not via OutputConverter's content switch.
  
  Known follow-up: python (foundry_hosting/_responses.py) has the same
  output-side gap (ToolApprovalRequestContent emission). Out of scope here.
  
  Tests: +9 unit tests covering both fresh-input and history-replay shapes,
  StateBag mapping resolution, and the non-FunctionCallContent skip path.
  Existing 108 converter tests still pass; full suite 370/370.
  
  Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
  
  * Address PR review feedback for hosted-declarative-dotnet
  
  FileSystemAgentSessionStore reliability/scoping:
  
  - Bound Sanitize() stackalloc at 256 chars, fall back to ArrayPool for longer ids so a long conversationId can no longer crash the hosting process with StackOverflowException.
  
  - Use a Guid-suffixed temp file (\{path}.{guid}.tmp\) so concurrent SaveSessionAsync calls on the same conversation can no longer race on the same temp file. Best-effort temp cleanup on failure.
  
  - Bucket session files by agent.Name when set so two keyed agents that happen to share a conversationId no longer overwrite each other's persisted state. Single-agent / unnamed-agent cases keep the original flat layout (Python parity).
  
  DeclarativeWorkflowExecutor chat-protocol routing:
  
  - ConfigureChatProtocolRoutes uses IsAssignableFrom rather than exact type equality so a broader TInput (object, base interfaces) does not have its inherited inputTransform shadowed by handlers we register here.
  
  - HandleChatMessagesAsync / HandleChatMessageArrayAsync now advance through every message in the batch instead of keeping only the trailing one, so multi-message turns and replayed history are no longer silently truncated. AdvanceAsync gains a finalizeTurn flag so only the last message in the batch sends the result.
  
  Tests:
  
  - New FileSystemAgentSessionStoreTests covering constructor, fresh-session fallback for missing/empty files, root-directory creation, save/get round-trip, agent-Name scoping isolation, long conversationId, invalid-character sanitization, and concurrent-save behavior.
  
  - New InputConverterTests covering AppendFileContent: text/* data URI decode (with and without filename prefix), non-text data URI passthrough, malformed data URI fallback, and filename propagation onto UriContent / HostedFileContent.
  
  Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
  
  * Add tests for remaining PR review feedback (C2, D1, E1)
  
  C2: InputConverter — add 9 tests covering SDK content types that previously
  had no coverage:
    - SdkTextContent → TextContent (input + output paths)
    - SummaryTextContent → TextContent (input + output paths)
    - MessageContentReasoningTextContent → TextReasoningContent (input + output)
    - ComputerScreenshotContent (HTTP URL → UriContent, data: URI → DataContent,
      output path → UriContent)
  
  D1: OutputConverter — add 2 tests for the WorkflowEvent + Contents fall-through:
    - WorkflowEvent in RawRepresentation with text Contents must flow through
      the content-processing path (text-delta event emitted).
    - WorkflowEvent + ErrorContent must produce a failed event rather than be
      swallowed by the workflow branch.
  
  E1: SendActivityExecutor — extend CaptureActivityAsync to assert that the
  executor emits an AgentResponseEvent carrying the activity text with the
  correct ExecutorId and ChatRole.Assistant role.
  
  Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
  
  * Defense-in-depth: neutralize dot-segments in Sanitize and cap TryDecodeTextDataUri input size
  
  Addresses claude-opus-4.6 security review on PR #5589:
  
  - FileSystemAgentSessionStore.Sanitize now replaces all-dot segments
    (., .., ...) with underscores so a developer-controlled agent.Name
    cannot escape the root directory on Linux (where Path.GetInvalidFileNameChars
    only contains NUL and '/').
  
  - InputConverter.TryDecodeTextDataUri rejects encoded payloads larger than
    16 MiB before calling Convert.FromBase64String, preventing a single
    oversized data URI from triggering a multi-megabyte allocation.
  
  - Adds unit tests covering both fixes.
  
  Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
  
  * Fix Linux-only failure in SaveSessionAsync_SanitizesInvalidPathCharactersAsync
  
  '?' is in Path.GetInvalidFileNameChars only on Windows, not on Linux/macOS,
  so the test failed on Ubuntu in CI. Use Path.GetInvalidFileNameChars()[0]
  (skipping NUL) to pick a guaranteed-invalid character for the running OS,
  and assert the result no longer contains it.
  
  Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
  
  * Address claude-opus-4.6 security/reliability review feedback
  
  WorkflowSession.cs:
  - ExecutorFailedEvent handler no longer leaks the internal executor ID
    in error messages. Mirror the WorkflowErrorEvent pattern: surface the
    exception's Message when _includeExceptionDetails is true, fall back
    to the generic 'An error occurred while executing the workflow.' otherwise.
    This also resolves the failing WorkflowHostSmokeTests assertions.
  
  FileSystemAgentSessionStore.cs:
  - GetSessionPath no longer has a write side effect. Directory.CreateDirectory
    for the per-agent bucket is now performed only on the SaveSessionAsync
    path, so a read miss on GetSessionAsync no longer leaves an empty
    directory on disk.
  - Adds GetSessionAsync_NoExistingFile_DoesNotCreateAgentDirectoryAsync
    to lock in the no-side-effect-on-read contract.
  
  OutputConverterTests.cs:
  - Strengthen ConvertUpdatesToEventsAsync_ToolApprovalRequest_NonFunctionToolCall_SkippedAsync
    to assert exactly one event (the terminal ResponseCompletedEvent) so a
    spurious output-item-added/-done leak would now fail the test.
  
  Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
  
  * Address PR review: clean up comments and rename TryParseArguments
  
  - Remove Python-codebase references from C# XML docs and inline comments.
  - Drop fix-history comments referring to previously-resolved issues.
  - Drop `Defense-in-depth:` prefixes; keep the concrete `what & why`.
  - Drop `previously we kept only the trailing message` comment in
    DeclarativeWorkflowExecutor; just describe current loop behavior.
  - Rename InputConverter.TryParseArguments to ParseFunctionArgumentsObject
    to make the intent obvious at the call site.
  
  Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
  
  * Address PR review: collision-free Sanitize, MAF-style refactors
  
  - FileSystemAgentSessionStore.Sanitize now percent-encodes invalid chars
    (and `%` itself) instead of replacing them with `_`, eliminating
    collisions like `foo/bar` vs `foo_bar` mapping to the same bucket.
    All-dot segments encode every dot so Windows trailing-dot trimming
    cannot reintroduce a navigable name.
  - AddFoundryResponses XML doc updated to accurately describe the default
    store root (/.checkpoints when hosted, {cwd}/.checkpoints locally).
  - DeclarativeWorkflowExecutor.ConfigureChatProtocolRoutes now uses exact
    type equality instead of IsAssignableFrom so a broad TInput (e.g.
    object) does not skip registering IEnumerable<ChatMessage>, which
    ChatProtocolExtensions.IsChatProtocol requires verbatim.
  - SendActivityExecutor uses context.YieldOutputAsync(response) instead
    of manually constructing AgentResponseEvent, so the activity will
    participate in any future OutputFilter coverage.
  - WorkflowSession handles AgentResponseEvent in its own switch case,
    avoiding the second typecheck against output.Data.
  
  Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
  
  * fix(workflows): bridge declarative HITL through Foundry hosting via IExternalRequestEnvelope
  
  Introduce a new public interface IExternalRequestEnvelope in
  Microsoft.Agents.AI.Workflows that lets the runtime peek through a
  declarative-layer envelope without taking a circular reference back into
  the declarative package. ExternalInputRequest (declarative) implements
  it; ExternalInputResponse is constructed via the request's CreateResponse
  factory. WorkflowSession unwraps inner AIContent on the request side and
  rewraps the client's ChatMessage reply into an ExternalInputResponse on
  the response side. PortableValue cannot deserialize directly into an
  interface, so TryGetRequestEnvelope resolves the concrete type via
  RequestPortInfo.RequestType (TypeId -> Type.GetType) before casting.
  
  Public WorkflowHarness contract preserved: InvokeFunctionToolExecutor
  and WorkflowActionVisitor are unchanged from upstream, so public
  InvokeToolWorkflowTest scenarios continue to drive
  ExternalInputRequest / ExternalInputResponse directly through the
  harness.
  
  AgentFrameworkResponseHandler: skip prior conversation history replay
  when an existing session is being resumed (workflow checkpoint already
  holds the prior messages).
  
  WorkflowSession: when includeExceptionDetails is opted in, also unwrap
  DeclarativeActionException so HITL failures are debuggable.
  
  Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
  
  ---------
  
  Co-authored-by: alliscode <bentho@microsoft.com>
  Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

  Ben Thomas · 2026-05-04 22:09:54 +00:00
  4b5a8478de
• .NET: fix: Add session support for Handoff-hosted Agents (#5280)

  * fix: Add session support for Handoff-hosted Agents
  
  In order to better support using `Workflows` hosted as `AIAgents` inside of Handoff workflows, we need to make proper use of AgentSession. This causes potential issues around checkpointing and making sure that we properly compute only the new incoming messages for each agent invocation.
  
  * fix: AgentSession checkpointing using AIAgent's Serialize/Deserialize methods
  
  We cannot rely on implicit serialization through `HandoffHostState` because we are missing type information.
  
  * fix: Thread safety issue in `MultiPartyConversation.AllMessages`
  
  * fix: Enable unwrapping of FunctionResultContent when ExternalRequest was wrapped into FunctionCallContent

  Jacob Alber · 2026-04-17 20:15:27 +00:00
  5777ed26e6
• .NET: Fix RequestInfoEvent lost when resuming workflow from checkpoint (#4955)

  * Fix RequestInfoEvent lost when resuming workflow from checkpoint
  
  * Fix streaming run double disposal in tests and lockstep republishing before Started event is emitted.
  
  * Fix bug to remove messages after sending to avoid losing messages on send failure.
  
  * Fix declarative test harness

  Peter Ibekwe · 2026-04-01 15:38:48 +00:00
  38de991481
• .NET: fix: HandoffAgentExecutor does not output any response when non-streaming (#4745)

  * fix: HandoffAgentExecutor does not output any reponse when non-streaming
  
  * fix: Ensure Workflow outputs persisted in chat history when hosted AsAgent
  
  * fix: Remove duplicate history entry creation and ad test
  
  * test: Add streaming tests for AsAgent to smoke tests
  
  * feat: Add output configurability to Handoffs

  Jacob Alber · 2026-03-25 22:22:13 +00:00
  35f44e854e
• .NET: Pass through external input request and handle response conversion for workflow as agent scenario (#4361)

  * Handle external input request and response conversion for workflow as agent scenario
  
  * Remove unnecessary test comment
  
  * Fix PR comments
  
  * Updated to fix edge cases, and add more tests.
  
  * Update pending requests to use typed properties instead of relying on StateBag. replying to PR feedback.
  
  * Fixed external response de-dup and updated possible brittle test.
  
  * Address PR comments on sending turn token for normal messages and handle contentId collision by source agent
  
  * Remove unnecessary serialization element and address pr comment on intercepted outgoing requests
  
  * Updated MEAI changes for UserInput request and response abstractions.

  Peter Ibekwe · 2026-03-25 19:23:44 +00:00
  23921c0f6e
• .NET: [BREAKING] Workflows API Review Naming Changes (Part 1?) (#4090)

  * refactor: Normalize Run/RunStreaming with AIAgent
  
  * refactor: Clarify Session vs. Run -level concepts
  
  * Rename RunId to SessionId to better match Run/Session terminology in AIAgent
  * [BREAKING]: Will break existing checkpointed sessions in CosmosDb due to field rename
  
  * refactor: Rename and simplify interface around getting typed data out of ExternalRequest/Response
  
  * Also adds hints around using value types in PortableValue
  
  * refactor: Rename AddFanInEdge to AddFanInBarrierEdge
  
  This will prevent a breaking change later when we introduce a programmable FanIn edge, analogous to the FanOut edge's EdgeSelector.
  
  The goal, in the long run is to support a number of different FanIn scenarios, with naive FanIn (no barrier) by default, similar to FanOut.
  
  * refactor: AsAgent(this Workflow, ...) => AsAIAgent(...)
  
  * misc - part1: SwitchBuilder internal
  
  ---------
  
  Co-authored-by: Dmytro Struk <13853051+dmytrostruk@users.noreply.github.com>

  Jacob Alber · 2026-02-20 02:05:18 +00:00
  0086d38f58
• [BREAKING] .NET: Decouple Checkpointing from Run/StreamAsync APIs (#4037)

  * [BREAKING] refactor: Decouple Checkpointing and Execution APIs
  
  With this change, Checkpointing becomes an property of an IWorkflowExecutionEnvironment. This lets environments that are tightly-coupled to their CheckpointManager avoid needing to present APIs that would not work (e.g. taking in an InMemory CheckpointManager for Durable Tasks, for example)
  
  * refactor: Normalize IsCheckpointingEnabled naming

  Jacob Alber · 2026-02-19 16:41:35 +00:00
  c73bd87503
• .NET: [BREAKING] Add session StateBag for state storage and support multiple providers on the Agent (#3806)

  * .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>

  westey · 2026-02-13 14:08:07 +00:00
  3168eb4870
• .NET: [BREAKING] Move AgentSession.Serialize to AIAgent (#3650)

  * Move AgentSession.Serialize to AIAgent
  
  * Address PR comments.
  
  * Improve code and fix unit test
  
  * Update test agents to return a default json element instead of throwing where the the result of the serialization is never used.
  
  * Update further tests to actually serialize the session

  westey · 2026-02-04 15:52:15 +00:00
  6255abd687
• .NET: [BREAKING] Rename AgentThread to AgentSession (#3430)

  * Rename AgentThread to AgentSession
  
  * Add more renames
  
  * Update readme files
  
  * Revert nullable variable change and further fixes.
  
  * Revert change in header name
  
  * Fix some comments and tests
  
  * Update changelog.
  
  * Address PR feedback.
  
  * Fixing code review comments.
  
  * Fix new errors after merging latest code.

  westey · 2026-01-26 16:30:25 +00:00
  a3a9147e61