address chris' comments

src/AWS.Deploy.CLI/Commands/TypeHints/EnvironmentArchitectureCommand.cs

@@ -31,7 +31,8 @@ public Task<TypeHintResourceTable> GetResources(Recommendation recommendation, O
                 }
             };
 
-            foreach (var value in recommendation.Recipe.SupportedArchitectures ?? new List<SupportedArchitecture> { SupportedArchitecture.X86_64 })
+            foreach (var value in recommendation.Recipe.SupportedArchitectures ??
+                                  new List<SupportedArchitecture> { Enum.Parse<SupportedArchitecture>(Constants.Recipe.DefaultSupportedArchitecture) })
             {
                 var stringValue = value.ToString();
                 var row = new TypeHintResource(stringValue, stringValue);

src/AWS.Deploy.Common/DeploymentBundles/DeploymentBundle.cs

@@ -1,6 +1,7 @@
 // Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
 // SPDX-License-Identifier: Apache-2.0
 
+using System;
 using AWS.Deploy.Common.Recipes;
 
 namespace AWS.Deploy.Common
@@ -69,6 +70,6 @@ public class DeploymentBundle
         /// <summary>
         /// The CPU architecture of the environment to create.
         /// </summary>
-        public SupportedArchitecture EnvironmentArchitecture { get; set; } = SupportedArchitecture.X86_64;
+        public SupportedArchitecture EnvironmentArchitecture { get; set; } = Enum.Parse<SupportedArchitecture>(Constants.Recipe.DefaultSupportedArchitecture);
     }
 }

src/AWS.Deploy.Constants/AWS.Deploy.Constants.projitems

@@ -15,6 +15,7 @@
     <Compile Include="$(MSBuildThisFileDirectory)Docker.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)EC2.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)ElasticBeanstalk.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Recipe.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)RecipeIdentifier.cs" />
   </ItemGroup>
 </Project>

src/AWS.Deploy.Constants/Recipe.cs

@@ -0,0 +1,13 @@
+// Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.\r
+// SPDX-License-Identifier: Apache-2.0
+
+namespace AWS.Deploy.Constants
+{
+    internal class Recipe
+    {
+        /// <summary>
+        /// The default supported architecture
+        /// </summary>
+        public const string DefaultSupportedArchitecture = "X86_64";
+    }
+}

src/AWS.Deploy.Orchestration/Orchestrator.cs

@@ -246,7 +246,7 @@ public async Task ApplyAllReplacementTokens(Recommendation recommendation, strin
             }
             if (recommendation.ReplacementTokens.ContainsKey(Constants.RecipeIdentifier.REPLACE_TOKEN_DEFAULT_ENVIRONMENT_ARCHITECTURE))
             {
-                recommendation.AddReplacementToken(Constants.RecipeIdentifier.REPLACE_TOKEN_DEFAULT_ENVIRONMENT_ARCHITECTURE, SupportedArchitecture.X86_64.ToString());
+                recommendation.AddReplacementToken(Constants.RecipeIdentifier.REPLACE_TOKEN_DEFAULT_ENVIRONMENT_ARCHITECTURE, Constants.Recipe.DefaultSupportedArchitecture);
             }
         }
 

test/AWS.Deploy.Orchestration.UnitTests/OrchestratorTests.cs

@@ -66,6 +66,8 @@ public async Task ApplyAllReplacementTokensTest()
         recommendation.ReplacementTokens.Clear();
         recommendation.ReplacementTokens.Add(Constants.RecipeIdentifier.REPLACE_TOKEN_DEFAULT_ENVIRONMENT_ARCHITECTURE, true);
 
-        await Assert.ThrowsAsync<InvalidOperationException>(async () => await orchestrator.ApplyAllReplacementTokens(recommendation, "WebAppNoDockerFile"));
+        await orchestrator.ApplyAllReplacementTokens(recommendation, "WebAppNoDockerFile");
+
+        Assert.Equal(Constants.Recipe.DefaultSupportedArchitecture, recommendation.ReplacementTokens[Constants.RecipeIdentifier.REPLACE_TOKEN_DEFAULT_ENVIRONMENT_ARCHITECTURE]);
     }
 }