Commit Graph

30 Commits

  • .NET: Workflow Outputs Overhaul: Support Tagging, Filtering Agent Outputs (#6045)
    * test: reshuffle .NET Workflow tests in preparation for Outputs overhaul
    
    Phase 1 of the .NET Workflows outputs overhaul (see
    working/implementation-plan.md). Pure moves/renames in
    dotnet/tests/Microsoft.Agents.AI.Workflows.UnitTests; no production code
    changes, no new test cases. The split keeps each orchestration mode in
    its own source file so the upcoming tag-aware and orchestration-default
    test additions land on clean diffs.
    
    Renames:
    * WorkflowBuilderSmokeTests.cs -> WorkflowBuilderTests.cs (with class
      rename to match). The scope is no longer "smoke"-only once subsequent
      phases add tag-aware builder tests.
    * InputWaiterAndOutputFilterTests.cs -> InputWaiterTests.cs +
      OutputFilterTests.cs. The file already declared the two test classes
      separately; this split simply gives each its own file so the
      output-filter cases have a dedicated home for tag-aware additions.
    
    Split of AgentWorkflowBuilderTests.cs:
    * AgentWorkflowBuilderTests.cs is now the outer
      `public static partial class AgentWorkflowBuilderTests` holding the
      shared test helpers (DoubleEchoAgent + session + WithBarrier variant,
      WorkflowRunResult, RunWorkflow* methods) bumped from `private` to
      `internal` so the new top-level GroupChatWorkflowBuilderTests in the
      same assembly can reach them.
    * AgentWorkflowBuilder.SequentialTests.cs (nested SequentialTests):
      BuildSequential_InvalidArguments_Throws,
      BuildSequential_AgentsRunInOrderAsync.
    * AgentWorkflowBuilder.ConcurrentTests.cs (nested ConcurrentTests):
      BuildConcurrent_InvalidArguments_Throws,
      BuildConcurrent_AgentsRunInParallelAsync.
    
    Sequential and Concurrent are kept as nested classes because they're
    modes of the same `AgentWorkflowBuilder` static factory and do not
    produce dedicated builder types.
    
    New file:
    * GroupChatWorkflowBuilderTests.cs (top-level): the existing
      BuildGroupChat_* and GroupChatManager_* cases moved out of the old
      AgentWorkflowBuilderTests file. They exercise the
      `GroupChatWorkflowBuilder` type (returned by
      `AgentWorkflowBuilder.CreateGroupChatBuilderWith`), so a dedicated
      top-level test class - matching the convention reserved by the plan
      for HandoffWorkflowBuilderTests / MagenticWorkflowBuilderTests - is
      the right home. Cross-class helper references qualify with
      `AgentWorkflowBuilderTests.DoubleEchoAgent` and
      `AgentWorkflowBuilderTests.RunWorkflowAsync`.
    
    The outer partial class is `static` (and nested classes carry the
    instance test methods) because the outer holds only static helpers;
    this satisfies CA1052 without suppressions and is invisible to xUnit
    discovery, which finds tests on the nested classes as
    `AgentWorkflowBuilderTests.SequentialTests.*` etc.
    
    Validation: `dotnet build` clean on both target frameworks; all 547
    tests in Microsoft.Agents.AI.Workflows.UnitTests pass on net10.0.
    
    Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
    
    * feat: introduce OutputTag, Futures, and tag-aware WorkflowBuilder API
    
    Phase 2 of the .NET Workflows outputs overhaul. Additive code change
    only - no observable runtime behavior change. The runner still uses the
    legacy bypass for AgentResponse / AgentResponseUpdate payloads, and the
    new `Futures.EnableAgentResponseOutputTaggingAndFiltering` flag defaults
    to false. Phase 3 will wire the flag into the runner; this commit only
    introduces the types and the builder API.
    
    New public surface:
    * `OutputTag` (readonly struct): wraps a string Value with ordinal
      equality (IEquatable, GetHashCode, == / !=) so it can participate as a
      HashSet element. Internal ctor closes the set. One public singleton:
      `OutputTag.Intermediate`. Terminal / regular outputs carry no tag
      (empty Tags set). JSON-serialized as a bare string via
      [JsonConverter(typeof(OutputTagJsonConverter))], with the converter
      rehydrating to the well-known singleton on read.
    * `Futures` (static class): hosts opt-in pre-GA behavior switches.
      First flag is `EnableAgentResponseOutputTaggingAndFiltering`; XML doc
      captures the v2.0.0 obsoletion / v3.0.0 removal lifecycle.
    * `WorkflowOutputEvent.Tags`: `HashSet<OutputTag>` exposed directly
      (concrete collection, matches the JSON-serialization convention used
      for `WorkflowInfo.OutputExecutorIds`). Never null; empty for legacy /
      terminal events. New ctors take a single `OutputTag` or
      `IEnumerable<OutputTag>?`; the existing (data, executorId) ctor
      remains and produces an untagged event. `HasTag(OutputTag)` helper.
      `AgentResponseEvent` and `AgentResponseUpdateEvent` gain matching
      tag-accepting ctors forwarding to the base.
    * `WorkflowOutputEventExtensions.IsIntermediate(this WorkflowOutputEvent)`:
      extension method returning `evt.HasTag(OutputTag.Intermediate)`. The
      preferred way to ask "is this an intermediate output?" without
      reaching into the Tags set.
    * `WorkflowBuilder.WithOutputFrom(IEnumerable<ExecutorBinding>, OutputTag)`
      and `WorkflowBuilder.WithOutputFrom(ExecutorBinding, OutputTag)`:
      forward-looking tagged overloads. The IEnumerable form is the primary
      tagged surface; the single-executor form is a convenience for the
      common one-executor case. Currently usable for the
      `OutputTag.Intermediate` singleton; will become the primary surface
      once the `OutputTag` constructor is opened to user-defined tags in
      a future release. Callers in this release should prefer the
      intent-specific `WithIntermediateOutputFrom` extension for the
      intermediate case. Tags accumulate across repeated calls; same tag
      repeated dedupes via the HashSet.
    * `WorkflowBuilderExtensions.WithIntermediateOutputFrom(this WorkflowBuilder, IEnumerable<ExecutorBinding>)`:
      helper that forwards to `WithOutputFrom(executors, OutputTag.Intermediate)`.
      Takes an IEnumerable (matching the tagged WithOutputFrom shape) -
      callers pass collection literals: `builder.WithIntermediateOutputFrom([a, b])`.
      XML doc remarks call out the Futures-flag interaction and the
      AIAgent-payload forwarding contract.
    
    Internal shape changes:
    * `WorkflowBuilder._outputExecutors`: HashSet<string> -> Dictionary<
      string, HashSet<OutputTag>>. The value set is empty for executors
      designated only via the untagged WithOutputFrom; contains Intermediate
      (and possibly future tags) otherwise.
    * `Workflow.OutputExecutors`: HashSet<string> -> Dictionary<string,
      HashSet<OutputTag>>.
    * `OutputFilter.CanOutput`: `Contains(id)` -> `ContainsKey(id)`.
    * `WorkflowInfo.OutputExecutorIds`: HashSet<string> -> Dictionary<
      string, HashSet<OutputTag>>, with a custom JsonConverter that reads
      both the new map shape (`{id: ["intermediate", ...]}`) and the legacy
      array shape (`[id1, id2]`, where each id is treated as an untagged
      output). Always writes the map shape. IsMatch updated to compare
      per-id tag sets.
    
    Tests landing in this commit (per the test-with-feature principle):
    * `OutputTagTests.cs` (6 tests): KnownValues, EqualityIsOrdinalOnValue,
      DefaultStructValueIsDistinct (default(OutputTag) does not collide
      with the Intermediate singleton in a HashSet),
      GetHashCodeMatchesEquals, JsonConverter_RoundtripsValueAsString,
      ConstructorIsInternal (reflection-based assertion that the (string)
      ctor is `internal`).
    * `WorkflowBuilderTests.cs` adds 7 new tests pinning the builder
      API contract: RegistersWithEmptyTagSet, AddsIntermediateTag,
      MultipleExecutorsAllUntagged, ThenIntermediate_AccumulatesTags,
      RepeatedDedupes, OnlyRegistersWithoutPriorWithOutputFrom,
      TracksExecutorBinding.
    * `BackwardsCompatibility/JsonCheckpointSerializationTests.cs`
      (new folder + file, 5 tests): event-level ctor contract tests
      (single-tag, no-tag, multi-tag — the last with a custom tag);
      IsIntermediate() asserted; load-bearing JSON BC tests for
      `WorkflowInfo.OutputExecutorIds` -
      `WorkflowOutputExecutorsReadsLegacyArrayShape` (legacy ids map to
      empty tag sets) and `WorkflowOutputExecutorsWritesMapShape`.
    
    The plan's three JSON round-trip tests for `WorkflowOutputEvent.Tags`
    were dropped: `WorkflowEvent` is not currently a serialized checkpoint
    shape (see the comment in WorkflowsJsonUtilities.cs about events not
    being persisted), so there is no real back-compat surface to pin
    through JSON. They are substituted with in-process ctor/property
    round-trip tests that exercise the `Tags` / `HasTag` / `IsIntermediate`
    contract.
    
    Validation: full `Microsoft.Agents.AI.Workflows.UnitTests` suite runs
    green on net10.0 (565 passing, 0 failing). Core library builds clean
    on net472, netstandard2.0, net8.0, net9.0, and net10.0. Test project
    builds clean on net472 + net10.0.
    
    Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
    
    * feat: route AgentResponse(Update) through the output filter under a Futures flag
    
    `InProcessRunnerContext.YieldOutputAsync` historically special-cased AgentResponse and
    AgentResponseUpdate payloads: it built the typed event subclass and emitted it directly,
    bypassing the output filter. Rewrites the method so that:
    
    - When `Futures.EnableAgentResponseOutputTaggingAndFiltering` is `false` (the current
      default), AgentResponse(Update) keep the legacy bypass — emitted as
      AgentResponseEvent / AgentResponseUpdateEvent with no tags. Existing callers see no
      behavior change.
    - When the flag is `true`, AIAgent payloads flow through the output filter just like
      every other payload type: undesignated sources are dropped, and the emitted event
      carries the source's tag set (empty for terminal `WithOutputFrom`, `{Intermediate}`
      for `WithIntermediateOutputFrom`, the set union when both designations apply).
    
    Non-AIAgent (POCO) outputs also now carry the source's tag set on the emitted
    WorkflowOutputEvent unconditionally — additive, since no existing assertion inspected
    Tags. Subclass events (`AgentResponseEvent` / `AgentResponseUpdateEvent`) continue to
    be emitted under both modes so `switch (evt) { case AgentResponseEvent: ... }`
    consumer code keeps matching.
    
    Adds `OutputFilter.TryGetTags` as the tag-aware lookup used by the runner.
    `OutputFilter.CanOutput` is kept (still used by the existing sync tests in
    `OutputFilterTests.cs`).
    
    Tests
    -----
    - `Futures/Futures.AgentResponseOutputFilteringAndTaggingTests.cs` (new): the F1–F13
      matrix from the plan, covering every combination of `(flag on/off) × (designation)
      × (payload shape)`. Uses a `FuturesScope` IDisposable + a `FuturesSerial` xUnit
      collection (DisableParallelization = true) to keep the process-global flag from
      leaking across parallel tests.
    - `OutputFilterTests.cs`: four new `Test_OutputFilter_…` cases for the `TryGetTags`
      surface (empty-tag-set for terminal designation, `{Intermediate}` for intermediate
      designation, union for accumulated designation, `false` for unregistered).
    
    582/582 unit tests pass on net10.0 (565 baseline + 17 new).
    
    Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
    
    * feat: tag-aware defaults and designation API on orchestration builders
    
    Aligns the .NET orchestration builders with Python's output / intermediate-output
    distinction. Each builder either applies a Python-aligned default designation set or
    replays the user's explicit `WithOutputFrom` / `WithIntermediateOutputFrom` calls,
    never both.
    
    Static `AgentWorkflowBuilder.BuildSequential` / `BuildConcurrent` apply defaults
    unconditionally (no user-facing fluent surface to take control through):
    
    - Sequential: terminal `end` + every agent designated intermediate.
    - Concurrent: terminal `end` + every agent and per-agent accumulator designated
      intermediate.
    
    The three fluent instance builders memoize agent-typed designation calls in a
    `Dictionary<AIAgent, HashSet<OutputTag>>` (empty set = terminal-only, non-empty =
    intermediate tag(s)) so repeated calls dedupe naturally. They replay the entries
    at `Build()` time, suppressing defaults when any call has been made:
    
    - `HandoffWorkflowBuilder` / `HandoffWorkflowBuilderCore<TBuilder>` (also picked up
      by the obsolete `HandoffsWorkflowBuilder` via inheritance).
      Default: terminal `HandoffEnd` + every handoff agent intermediate.
      (Bug fix: legacy code relied on `WithOutputFrom(end)` to bind `HandoffEnd`. The
      new explicit-designation path bypasses that, so `Build()` now calls
      `BindExecutor(end)` unconditionally to keep validation happy.)
    - `GroupChatWorkflowBuilder` — default: terminal host + every participant intermediate.
    - `MagenticWorkflowBuilder` — default: terminal orchestrator + every team member
      intermediate.
    
    Designating a non-participant agent throws `InvalidOperationException`.
    
    The bare `WorkflowBuilder` default is unchanged — only the orchestration-style
    builders gain implicit defaults, matching the plan's non-goal.
    
    Tests
    -----
    - `AgentWorkflowBuilder.SequentialTests` / `.ConcurrentTests`: one default-spec
      assertion each.
    - `GroupChatWorkflowBuilderTests`: defaults-match-spec, explicit-replaces-defaults,
      non-participant throws.
    - `HandoffWorkflowBuilderTests` (new file): same three.
    - `MagenticWorkflowBuilderTests` (new file): same three.
    
    593/593 unit tests pass on net10.0 (582 baseline + 11 new).
    
    Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
    
    * 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>
    
    * feat: SequentialWorkflowBuilder and ConcurrentWorkflowBuilder, OrchestrationBuilderBase
    
    Promotes the Sequential and Concurrent orchestration shapes to first-class fluent
    builder classes, matching Handoff / GroupChat / Magentic. Users can call
    `WithOutputFrom(agents)` / `WithIntermediateOutputFrom(agents)` to control which
    agents are designated output / intermediate sources; when no designation call is
    made, the Python-aligned defaults apply (terminal aggregator output + every agent
    intermediate; Concurrent also tags per-agent accumulators).
    
    `AgentWorkflowBuilder.BuildSequential(...)` and `BuildConcurrent(...)` are kept
    and now delegate to the new builders; observable behavior unchanged. Five static
    factories now mirror each other:
    
    - `AgentWorkflowBuilder.CreateSequentialBuilderWith(params IEnumerable<AIAgent>)`
    - `AgentWorkflowBuilder.CreateConcurrentBuilderWith(params IEnumerable<AIAgent>)`
    - `AgentWorkflowBuilder.CreateHandoffBuilderWith(AIAgent)`        (already existed)
    - `AgentWorkflowBuilder.CreateGroupChatBuilderWith(Func<...>)`    (already existed)
    - `AgentWorkflowBuilder.CreateMagenticBuilderWith(AIAgent)`       (new)
    
    OrchestrationBuilderBase
    ------------------------
    New abstract `OrchestrationBuilderBase<TBuilder>` unifies the shared fluent
    surface across all five orchestration builders: `WithName`, `WithDescription`,
    `WithOutputFrom`, `WithIntermediateOutputFrom`, and the
    `ApplyOutputDesignations(builder, agentMap, kind, applyDefaults)` helper that
    either replays the user's designations or invokes the orchestration-specific
    defaults.
    
    Removes ~150 LOC of duplicated designation-management code from the four
    non-Handoff builders, plus the equivalent from `HandoffWorkflowBuilderCore`.
    
    Tests
    -----
    - New `SequentialWorkflowBuilderTests.cs` / `ConcurrentWorkflowBuilderTests.cs`
      (replace the old `AgentWorkflowBuilder.{Sequential,Concurrent}Tests.cs`
      nested-class files). Method names normalized to
      `Test_<BuilderType>_<Scenario>[Async]`.
    - Shared helpers (`DoubleEchoAgent`, `DoubleEchoAgentWithBarrier`,
      `WorkflowRunResult`, `RunWorkflow*`) moved from the old
      `AgentWorkflowBuilderTests` partial class into a new
      `OrchestrationTestHelpers` static class in `OrchestrationTestHelpers.cs`.
      Downstream test files (Group Chat, Handoff, Sequential, Concurrent) updated
      to qualify with `OrchestrationTestHelpers.*`.
    - A new `AgentWorkflowBuilderTests.cs` covers the static surface directly:
      `BuildSequential` / `BuildConcurrent` invariants and aggregator wiring, plus
      null-rejection + round-trip checks for every `Create*BuilderWith` factory.
    - New AsAgent intermediate-suppression tests on a nested `AsAgentForwarding`
      class for each of Sequential and Concurrent: build with only the terminal
      agent designated via `WithOutputFrom`, run via `AsAIAgent(...)`, assert via
      `AgentResponseUpdate.AuthorName` that intermediate agents do not surface.
      Both join the `FuturesSerial` collection.
    - New `Test_<Builder>_WithDescriptionPropagatesToWorkflow` smoke tests on
      Sequential and Concurrent (newly available via the base class).
    
    625/625 unit tests pass on net10.0.
    
    Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
    
    * chore: dotnet format
    
    * fixup: encoding
    
    * fixup: charset
    
    * fixup: Updates for PR feedback
    
    * fixup: format
    
    * fixup: merge issue
    
    * Fix intermediate filtering on .AsAgent()
    
    * fix filter logic
    
    * fix: Revert logic change and add comments
    
    ---------
    
    Co-authored-by: Jacob Alber <jalber@lokitoth.com>
    Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
  • .NET: feat: Update GroupChatManager semantics to match other Orchestration patterns (#6140)
    * Refactor group chat workflow to prevent message echoing and enhance checkpointing
    
    - Updated GroupChatWorkflowBuilder to disable forwarding incoming messages to prevent duplicates.
    - Enhanced RoundRobinGroupChatManager with checkpointing support to preserve state across executions.
    - Modified GroupChatHost to maintain a history of messages and track the current speaker for message broadcasting.
    - Implemented broadcasting logic to ensure participants receive messages from others while excluding their own responses.
    - Added comprehensive unit tests for group chat orchestration, including scenarios for tool approval and function calls.
    - Introduced a new ApprovalHarness for testing tool invocation and approval workflows.
    
    * fixup: format
    
    * Add JSON serialization support for GroupChatManagerState and RoundRobinGroupChatManagerState
    
    ---------
    
    Co-authored-by: Jacob Alber <jalber@lokitoth.com>
  • .NET fix: Synthesized Handoff FunctionResult is never sent to agent (#5718)
    * test: Split out Handoff Orchestration tests
    
    * fix: Synthesized Handoff FunctionResult is never sent to agent
    
    When we receive a handoff request from the agent, we need to service it outside of the Agent Loop to terminate the loop. What this means is that we take ownership of terminating the call by feeding the result back into the agent on a subsequent invocation.
    
    When we refactored Handoff to support HITL and make use of AgentSession, we inadvertantly removed this step, causing subsequent invocations to the Handoff agent to fail (first works, but breaks the state).
    
    The fix is to be more precise about the agent's bookmark when concatenating the result of agent invocation to the shared conversation history.
    
    * test: Add unit tests for Handoff FunctionCall/Result matching fix
  • .NET: fix: Foundry Agents without description in Handoff (#5311)
    * fix: Foundry Agents without description in Handoff
    
    Foundry Agents without a description set will return an empty string (rather than null) for the description. This was breaking the fallback logic for `handoffReason`.
    
    * test: Add unit tests
  • .NET: feat: Refactor Handoff Orchestration and add HITL support (#5174)
    * feat: Refactor Handoff Orchestration and add HITL support
    
    * Change HandoffAgentExecutor to use factory-based instantiation
    * Extract shared request collection logic in AIAgentUnservicedRequestsCollector
    * Refactor HandoffAgentExecutor to use the "ContinueTurn" pattern as in AIAgentHostExecutor
    
    * fix: Remove '$' from exception strings
  • .NET: feat: Implement return-to-previous routing in handoff workflow (#4356)
    * feat: Implement return-to-previous routing in handoff workflow
    
    - Also obsoletes HandoffsWorkflowBuilder => HandoffWorkflowBuilder (no "s")
    
    * refactor: Remove instance-shared current agent tracking in handoffs
    
    Because the tracker was instance-shared between the start and end executors, it would be shared between all sessions, resulting in incorrect behaviour.
    
    The corect way to do this is to keep the data in a shared executor scope, which is per-session.
    
    * fix: Fix test logic for Handoff to correctly use checkpointing for multiturn
  • .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>
  • .NET: Remove FunctionCalls and Tool Messages from Handoff passed messages (#3811)
    * Fix handoff orchestration not passing user message to handoff target agent (#3161)
    
    Filter out internal handoff function call and tool result messages before
    passing conversation history to the target agent's LLM. These messages
    confused the model into ignoring the original user question.
    
    * Add handoff tool call filtering behavior and enhance workflow builder
    
    - Introduced HandoffToolCallFilteringBehavior enum to specify filtering behavior for tool call contents in handoff workflows.
    - Updated HandoffsWorkflowBuilder to support customizable handoff instructions and tool call filtering behavior.
    - Enhanced HandoffAgentExecutor to utilize new filtering options for improved message handling during agent handoffs.
    
    * Enhance handoff message filtering logic and add unit tests for filtering behaviors
    
    * Refactor HandoffMessagesFilter to remove unused handoff function names and enhance filtering logic for non-handoff function calls
    
    * Refactor HandoffMessagesFilter to streamline FilterCandidateState initialization and improve clarity
    
    * Refactor HandoffMessagesFilter to improve filtering logic and add integration tests for handoff workflows
    
    * fix: HandoffAgentExecutor tests
  • [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
  • .NET: [BREAKING] Implement Polymorphic Routing (#3792)
    * feat: Implement Polymorphic Routing
    
    * feat: Add support for Send/Yield annotations with basic Executor
    
    * Adds annotations to Declarative workflow executors
    
    * fix: Address PR Comments
    
    * Implicit filter in collection loops
    * Remove debug / usused / superfluous code
    * Fix ProtocolBuilder implicit output registrations
    * Fix logic error in ExecuteRouteGeneratorTests.ClassWithManualConfigureProtocol_DoesNotGenerate
    
    * fix: Solidify type checks and send/yield type registrations
    
    * fix: Suppress generation of TurnTokens out of AggregateTurnMessagesExecutor
    
    * Fixes an issue where ConcurrentEndExecutor is not expecting TurnTokens.
    
    * fix: Add ProtocolBuilder support for chained-delegation
    
    * Updates Declarative pacakge to rely on chained-delegation Send/Yield registration
    * Renames DeclarativeActionExectuor's new ExecuteAsync to ExecuteActionAsync to avoid colliding with Executor.ExecutoeAsync
    
    * fix: Address PR Comments
    
    * Fixes type mapping in FanInEdgeRunner
    * Fixes and expalins send/yield type registration in FunctionExecutor
    
    * fixup: build-break
    
    * fix: Add missing SendsMesage declaration to InvokeAzureAgentExecutor
  • .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>
  • .NET: [BREAKING] Change SerializeSession to be Async (#3879)
    * Change SerializeSession to be Async
    
    * Update Changelog
  • .NET: Introduce Core implementation methods for session methods on AIAgent (#3699)
    * Introduce Core implementation methods for session methods on AIAgent
    
    * Update changelog
  • .NET: [BREAKING] Rename session state json param (#3681)
    * Rename session state json param to ensure consistency
    
    * Fix merge failures and PR comments.
  • .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
  • .NET: [BREAKING] Rename GetNewSession to CreateSession (#3501)
    * Rename GetNewSession to CreateSession
    
    * Address copilot feedback
    
    * Suppress warning
    
    * Suppress warning
    
    * Fix further warnings.
  • .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.
  • .NET: [Breaking] Rename AgentRunResponseEvent and AgentRunUpdateEvent classes (#3214)
    * rename AgentRunResponseEvent and AgentRunUpdateEvent classes
    
    * rollback unnecessary changes
  • .NET: [Breaking] RenameAgentRunResponse and AgentRunResponseUpdate classes (#3197)
    * rename AgentRunResponse and AgentRunResponseUpdate classes - part1
    
    * rename varialbles, parameters, methods and tests
    
    * rollback unnecessary changes
  • .NET: [BREAKING] Change GetNewThread and DeserializeThread to async (#3152)
    * Change GetNewThread and DeserializeThread plus ChatMessageStore and AIContextProvider Factories to async
    
    * Merge fixes
  • .NET: [Breaking] Introduce RunCoreAsync/RunCoreStreamingAsync delegation pattern in AIAgent (#2749)
    * Initial plan
    
    * Refactor AIAgent: Make RunAsync and RunStreamingAsync non-abstract, add RunCoreAsync and RunCoreStreamingAsync
    
    Co-authored-by: SergeyMenshykh <68852919+SergeyMenshykh@users.noreply.github.com>
    
    * Fix infinite recursion in test implementations
    
    Co-authored-by: SergeyMenshykh <68852919+SergeyMenshykh@users.noreply.github.com>
    
    * Make RunAsync and RunStreamingAsync non-virtual as requested
    
    Co-authored-by: SergeyMenshykh <68852919+SergeyMenshykh@users.noreply.github.com>
    
    * Fix DelegatingAIAgent subclasses to use RunCoreAsync/RunCoreStreamingAsync
    
    Co-authored-by: SergeyMenshykh <68852919+SergeyMenshykh@users.noreply.github.com>
    
    * Fix XML documentation references in AnonymousDelegatingAIAgent
    
    Co-authored-by: SergeyMenshykh <68852919+SergeyMenshykh@users.noreply.github.com>
    
    * Restore <see cref> tags with proper qualified signatures in AnonymousDelegatingAIAgent
    
    Co-authored-by: SergeyMenshykh <68852919+SergeyMenshykh@users.noreply.github.com>
    
    * Rollback unnecessary XML documentation changes in AnonymousDelegatingAIAgent
    
    Co-authored-by: SergeyMenshykh <68852919+SergeyMenshykh@users.noreply.github.com>
    
    * Remove pragma and update crefs to RunCoreAsync/RunCoreStreamingAsync
    
    Co-authored-by: SergeyMenshykh <68852919+SergeyMenshykh@users.noreply.github.com>
    
    * Fix EntityAgentWrapper to call base.RunCoreAsync/RunCoreStreamingAsync
    
    Co-authored-by: SergeyMenshykh <68852919+SergeyMenshykh@users.noreply.github.com>
    
    * fix compilation issues
    
    * fix compilatio issue
    
    * fix tests
    
    * fix unit tests
    
    * fix unit test
    
    ---------
    
    Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
    Co-authored-by: SergeyMenshykh <68852919+SergeyMenshykh@users.noreply.github.com>
    Co-authored-by: SergeyMenshykh <sergemenshikh@gmail.com>
    Co-authored-by: Chris <66376200+crickman@users.noreply.github.com>
  • fix: .NET: Concurrency Support for Orchestrations (#1689)
    Concurrent run support was recently added to workflows, but Orchestrations did not fully update to support it. A few executors were missing Cross-Run Shareable annotations, and the ConcurrentEnd executor needed to be factory-instantiated.
    
    This also ports the fix for #1613 from #1637, to avoid waiting on that PR.
  • .NET: [BREAKING] Enable sharing of workflow instances across concurrently executing runs (#1464)
    * refactor: remove unused internals
    
    * feat: Execution Mode for sharing a workflow among concurrent runs
    
    * feat: Update WorkflowHostAgent to support concurrent execution
    
    * Also update AsAgent APIs to support injecting a CheckpointManager and an IWorkflowExecutionEnvironment
    
    * fix: Make Read logic consistent in DeclarativeWorkflowContext
  • .NET [WIP]: introduce Hosting extensions for Workflows (#1359)
    * skeleton
    
    * wip
    
    * rename + fix tests
    
    * implement workflow tests
    
    * fix comments
    
    * Update dotnet/src/Microsoft.Agents.AI.Hosting/HostApplicationBuilderWorkflowExtensions.cs
    
    Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
    
    * fixes
    
    * fix worfklow build logic
    
    * rollback + new overload on workflow builder
    
    * address PR comments
    
    * :)
    
    ---------
    
    Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
  • .NET: [BREAKING] Propagate CancellationToken into Workflow Executors and message handlers (#1280)
    * feat: Propagate CancellationToken to Executors
    
    * Also adds cancellation propagation to `Executor`-accessible APIs
    * Adds registrators for cancellable handlers to `RouteBuilder`
    * [BREAKING]: Adds `CancellationToken` to `IMessageHandler.HandleAsync`
    
    * test: Re-enable Concurrent Orchestration test
    
    * refactor: Delete unused IInputCoordinator
    
    * refactor: Remove superfluous argument qualifications
  • [BREAKING] .NET: Workflow Off-Thread Execution Mode (#1233)
    * Updates to async run loop.
    
    * fix: Workflow Onwership can be release by nonowner
    
    * fix: Incorrect handling of blockOnPending in StreamingRun
    
    Depending on whether we are running in streaming on non-streaming mode, we may be using the StreamingRun in different ways. Unfortunately, the only place we can really know what is the actual state of execution is in the RunEventStream implementations.
    
    This resulted in blocking where blocking was unneeded and occasionally not-blocking when blocking was needed.
    
    The fix is to move the logic of handling this blocking into RunEventStream implementations.
    
    * fix: Fix cleanup on error and end run
    
    This ensures we clean up the background resources correctly.
    
    * fix: Ensure we let the run loop proceed when shutting down
    
    * fix: Add timeout for Input Waiting
    
    * fix: Make the samples properly clean up `Run`s and `StreamingRun`s
    
    * fix: Simplify Declarative Workflow Run disposal pattern
    
    * Also fixes missing .Disposal() in Integration tests
    
    ---------
    
    Co-authored-by: Ben Thomas <ben.thomas@microsoft.com>
  • .NET: Move the AsAIAgent extension methods to the correct class (#1106)
    * Move the AsAIAgent extension methods to the correct class
    
    * Fix format issue
    
    * Disable unit test, see issue #1109
    
    ---------
    
    Co-authored-by: Mark Wallace <markwallace@microsoft.com>
  • .NET: Clean up stale mentions of M.E.AI.Agents (#997)
    * Clean up stale mentions of M.E.AI.Agents
    
    * Unused usings
  • .NET: Rename workflows projects (#975)
    * Renaming Microsoft.Agent.Workflows to Microsoft.Agents.AI.Workflows
    
    * Removing local settings.
    
    * Removing remining old files from merge.