refactor: [BREAKING] Remove generic Workflow<T> (#1551)

Remove input type checking in favour of explicit `.DescribeProtocolAsync()` flow. Also removes `.AsAgentAsync()` as the validation happens at workflow run time. This makes it easier to use Workflows with DI without resorting to async-over-sync.

dotnet/samples/GettingStarted/Workflows/Checkpoint/CheckpointAndRehydrate/Program.cs

@@ -25,7 +25,7 @@ public static class Program
     private static async Task Main()
     {
         // Create the workflow
-        var workflow = await WorkflowHelper.GetWorkflowAsync();
+        var workflow = WorkflowHelper.GetWorkflow();
 
         // Create checkpoint manager
         var checkpointManager = CheckpointManager.Default;
@@ -67,7 +67,7 @@ public static class Program
         Console.WriteLine($"Number of checkpoints created: {checkpoints.Count}");
 
         // Rehydrate a new workflow instance from a saved checkpoint and continue execution
-        var newWorkflow = await WorkflowHelper.GetWorkflowAsync();
+        var newWorkflow = WorkflowHelper.GetWorkflow();
         const int CheckpointIndex = 5;
         Console.WriteLine($"\n\nHydrating a new workflow instance from the {CheckpointIndex + 1}th checkpoint.");
         CheckpointInfo savedCheckpoint = checkpoints[CheckpointIndex];

dotnet/samples/GettingStarted/Workflows/Checkpoint/CheckpointAndRehydrate/WorkflowHelper.cs

@@ -13,7 +13,7 @@ internal static class WorkflowHelper
     /// 2. JudgeExecutor: Evaluates the guess and provides feedback.
     /// The workflow continues until the correct number is guessed.
     /// </summary>
-    internal static ValueTask<Workflow<NumberSignal>> GetWorkflowAsync()
+    internal static Workflow GetWorkflow()
     {
         // Create the executors
         GuessNumberExecutor guessNumberExecutor = new(1, 100);
@@ -24,7 +24,7 @@ internal static class WorkflowHelper
             .AddEdge(guessNumberExecutor, judgeExecutor)
             .AddEdge(judgeExecutor, guessNumberExecutor)
             .WithOutputFrom(judgeExecutor)
-            .BuildAsync<NumberSignal>();
+            .Build();
     }
 }
 

dotnet/samples/GettingStarted/Workflows/Checkpoint/CheckpointAndResume/Program.cs

@@ -24,7 +24,7 @@ public static class Program
     private static async Task Main()
     {
         // Create the workflow
-        var workflow = await WorkflowHelper.GetWorkflowAsync();
+        var workflow = WorkflowHelper.GetWorkflow();
 
         // Create checkpoint manager
         var checkpointManager = CheckpointManager.Default;

dotnet/samples/GettingStarted/Workflows/Checkpoint/CheckpointAndResume/WorkflowHelper.cs

@@ -13,7 +13,7 @@ internal static class WorkflowHelper
     /// 2. JudgeExecutor: Evaluates the guess and provides feedback.
     /// The workflow continues until the correct number is guessed.
     /// </summary>
-    internal static ValueTask<Workflow<NumberSignal>> GetWorkflowAsync()
+    internal static Workflow GetWorkflow()
     {
         // Create the executors
         GuessNumberExecutor guessNumberExecutor = new(1, 100);
@@ -24,7 +24,7 @@ internal static class WorkflowHelper
             .AddEdge(guessNumberExecutor, judgeExecutor)
             .AddEdge(judgeExecutor, guessNumberExecutor)
             .WithOutputFrom(judgeExecutor)
-            .BuildAsync<NumberSignal>();
+            .Build();
     }
 }
 

dotnet/samples/GettingStarted/Workflows/Checkpoint/CheckpointWithHumanInTheLoop/Program.cs

@@ -27,7 +27,7 @@ public static class Program
     private static async Task Main()
     {
         // Create the workflow
-        var workflow = await WorkflowHelper.GetWorkflowAsync();
+        var workflow = WorkflowHelper.GetWorkflow();
 
         // Create checkpoint manager
         var checkpointManager = CheckpointManager.Default;

dotnet/samples/GettingStarted/Workflows/Checkpoint/CheckpointWithHumanInTheLoop/WorkflowHelper.cs

@@ -10,7 +10,7 @@ internal static class WorkflowHelper
     /// Get a workflow that plays a number guessing game with human-in-the-loop interaction.
     /// An input port allows the external world to provide inputs to the workflow upon requests.
     /// </summary>
-    internal static ValueTask<Workflow<SignalWithNumber>> GetWorkflowAsync()
+    internal static Workflow GetWorkflow()
     {
         // Create the executors
         RequestPort numberRequest = RequestPort.Create<SignalWithNumber, int>("GuessNumber");
@@ -21,7 +21,7 @@ internal static class WorkflowHelper
             .AddEdge(numberRequest, judgeExecutor)
             .AddEdge(judgeExecutor, numberRequest)
             .WithOutputFrom(judgeExecutor)
-            .BuildAsync<SignalWithNumber>();
+            .Build();
     }
 }