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.NET: [Feature Branch] Add Human In the Loop support for durable workflows (#4358)

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* Add Azure Functions HITL workflow sample

Add 06_WorkflowHITL Azure Functions sample demonstrating Human-in-the-Loop
workflow support with HTTP endpoints for status checking and approval responses.

The sample includes:
- ExpenseReimbursement workflow with RequestPort for manager approval
- Custom HTTP endpoint to check workflow status and pending approvals
- Custom HTTP endpoint to send approval responses via RaiseEventAsync
- demo.http file with step-by-step interaction examples

* PR feedback fixes

* Minor comment cleanup

* Minor comment clReverted the `!context.IsReplaying` guards on `PendingEvents.Add`/`RemoveAll` and `SetCustomStatus` in `ExecuteRequestPortAsync`. The guards broke fan-out scenarios where parallel RequestPorts      need to be discoverable after replay. `SetCustomStatus` is idempotent metadata that doesn't affect replay determinism.eanup

* fix  for PR feedback

* PR feedback updates

* Improvements to samples

* Improvements to README

* Update samples to use parallel request ports.

* Unit tests

* Introduce local variables to improve readability of Workflows.Workflows access patter

* Use GitHub-style callouts and add PowerShell command variants in HITL sample README
This commit is contained in:
Shyju Krishnankutty
2026-03-03 11:19:14 -08:00
committed by GitHub
parent 2988568cab
commit ad51aee47b
36 changed files with 1970 additions and 109 deletions
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dotnet/src/Microsoft.Agents.AI.DurableTask/Workflows/DurableWorkflowJsonContext.cs
+5 -3
View File
@@ -1,4 +1,4 @@
// Copyright (c) Microsoft. All rights reserved.
// Copyright (c) Microsoft. All rights reserved.
using System.Text.Json.Serialization;
@@ -16,7 +16,7 @@ namespace Microsoft.Agents.AI.DurableTask.Workflows;
/// <item><description><see cref="DurableActivityInput"/>: Activity input wrapper with state</description></item>
/// <item><description><see cref="DurableExecutorOutput"/>: Executor output wrapper with results, events, and state updates</description></item>
/// <item><description><see cref="TypedPayload"/>: Serialized payload wrapper with type info (events and messages)</description></item>
/// <item><description><see cref="DurableWorkflowCustomStatus"/>: Custom status for streaming consumption</description></item>
/// <item><description><see cref="DurableWorkflowLiveStatus"/>: Live status payload (streaming events and pending request ports)</description></item>
/// </list>
/// <para>
/// Note: User-defined executor input/output types still use reflection-based serialization
@@ -31,8 +31,10 @@ namespace Microsoft.Agents.AI.DurableTask.Workflows;
[JsonSerializable(typeof(DurableExecutorOutput))]
[JsonSerializable(typeof(TypedPayload))]
[JsonSerializable(typeof(List<TypedPayload>))]
[JsonSerializable(typeof(DurableWorkflowCustomStatus))]
[JsonSerializable(typeof(DurableWorkflowLiveStatus))]
[JsonSerializable(typeof(DurableWorkflowResult))]
[JsonSerializable(typeof(PendingRequestPortStatus))]
[JsonSerializable(typeof(List<PendingRequestPortStatus>))]
[JsonSerializable(typeof(List<string>))]
[JsonSerializable(typeof(Dictionary<string, string>))]
[JsonSerializable(typeof(Dictionary<string, string?>))]