diff --git a/dotnet/src/Microsoft.Agents.AI.Workflows.Declarative.Foundry/Microsoft.Agents.AI.Workflows.Declarative.Foundry.csproj b/dotnet/src/Microsoft.Agents.AI.Workflows.Declarative.Foundry/Microsoft.Agents.AI.Workflows.Declarative.Foundry.csproj
index 407593536e..63c2bd30ae 100644
--- a/dotnet/src/Microsoft.Agents.AI.Workflows.Declarative.Foundry/Microsoft.Agents.AI.Workflows.Declarative.Foundry.csproj
+++ b/dotnet/src/Microsoft.Agents.AI.Workflows.Declarative.Foundry/Microsoft.Agents.AI.Workflows.Declarative.Foundry.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <IsReleaseCandidate>true</IsReleaseCandidate>
+    <!-- Preview while Microsoft.Agents.AI.Foundry is preview (blocked by Azure.AI.Projects 2.1.0-beta). Flip to IsReleased=true once that ships stable. -->
     <NoWarn>$(NoWarn);MEAI001;OPENAI001</NoWarn>
   </PropertyGroup>
 
diff --git a/dotnet/src/Microsoft.Agents.AI.Workflows.Declarative.Mcp/Microsoft.Agents.AI.Workflows.Declarative.Mcp.csproj b/dotnet/src/Microsoft.Agents.AI.Workflows.Declarative.Mcp/Microsoft.Agents.AI.Workflows.Declarative.Mcp.csproj
index bca32e93fc..00865e2fa6 100644
--- a/dotnet/src/Microsoft.Agents.AI.Workflows.Declarative.Mcp/Microsoft.Agents.AI.Workflows.Declarative.Mcp.csproj
+++ b/dotnet/src/Microsoft.Agents.AI.Workflows.Declarative.Mcp/Microsoft.Agents.AI.Workflows.Declarative.Mcp.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <IsReleaseCandidate>true</IsReleaseCandidate>
+    <IsReleased>true</IsReleased>
     <NoWarn>$(NoWarn);MEAI001;OPENAI001</NoWarn>
   </PropertyGroup>
 
@@ -13,9 +13,11 @@
 
   <Import Project="$(RepoRoot)/dotnet/nuget/nuget-package.props" />
 
-  <!-- Package not yet published to NuGet — disable baseline validation until first release -->
+  <!-- First Stable release after the RC milestone. Baseline against the latest 
+       published RC so package validation catches accidental breaking changes. 
+       Future releases should bump this to the previous stable version. -->
   <PropertyGroup>
-    <EnablePackageValidation>false</EnablePackageValidation>
+    <PackageValidationBaselineVersion>1.8.0-rc1</PackageValidationBaselineVersion>
   </PropertyGroup>
 
   <PropertyGroup>
diff --git a/dotnet/src/Microsoft.Agents.AI.Workflows.Declarative/Microsoft.Agents.AI.Workflows.Declarative.csproj b/dotnet/src/Microsoft.Agents.AI.Workflows.Declarative/Microsoft.Agents.AI.Workflows.Declarative.csproj
index 5f8cd37505..145dbe243b 100644
--- a/dotnet/src/Microsoft.Agents.AI.Workflows.Declarative/Microsoft.Agents.AI.Workflows.Declarative.csproj
+++ b/dotnet/src/Microsoft.Agents.AI.Workflows.Declarative/Microsoft.Agents.AI.Workflows.Declarative.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <IsReleaseCandidate>true</IsReleaseCandidate>
+    <IsReleased>true</IsReleased>
     <NoWarn>$(NoWarn);MEAI001;OPENAI001</NoWarn>
   </PropertyGroup>
 
@@ -13,6 +13,13 @@
 
   <Import Project="$(RepoRoot)/dotnet/nuget/nuget-package.props" />
 
+  <!-- First Stable release after the RC milestone. Baseline against the latest 
+       published RC so package validation catches accidental breaking changes. 
+       Future releases should bump this to the previous stable version. -->
+  <PropertyGroup>
+    <PackageValidationBaselineVersion>1.8.0-rc1</PackageValidationBaselineVersion>
+  </PropertyGroup>
+
   <PropertyGroup>
     <!-- NuGet Package Settings -->
     <Title>Microsoft Agent Framework Declarative Workflows</Title>