diff --git a/.gitea/workflows/ci.yml b/.gitea/workflows/ci.yml
index a8e9e279..977de436 100644
--- a/.gitea/workflows/ci.yml
+++ b/.gitea/workflows/ci.yml
@@ -105,6 +105,14 @@ jobs:
         fi
         node --version && npm --version
 
+    - name: Setup .NET SDK
+      uses: actions/setup-dotnet@v4
+      with:
+        dotnet-version: 10.0.x
+
+    - name: "[CRITICAL] Run .NET Unit Tests (Warnings as Errors)"
+      run: dotnet test src/dotnet/QuantEngine.Core.Tests/QuantEngine.Core.Tests.csproj -c Release --nologo -p:TreatWarningsAsErrors=true
+
     - name: "[CRITICAL] No Direct API Trading Gate"
       run: python3 tools/validate_no_direct_api_trading_v1.py
 
@@ -145,13 +153,7 @@ jobs:
     - name: Validate Quant Engine WBS
       run: python3 tools/validate_quant_engine_wbs_v1.py
 
-    - name: Setup .NET SDK
-      uses: actions/setup-dotnet@v4
-      with:
-        dotnet-version: 10.0.x
 
-    - name: Run .NET Unit Tests
-      run: dotnet test src/dotnet/QuantEngine.Core.Tests/QuantEngine.Core.Tests.csproj -c Release --nologo
 
     - name: Build Calibration Priority Backlog
       run: python3 tools/build_calibration_priority_v1.py
@@ -210,10 +212,10 @@ jobs:
       run: python3 tools/validate_replay_live_separation_v1.py
 
     - name: Render Final Decision Packet V4
-      run: dotnet run --project src/dotnet/QuantEngine.Tools/QuantEngine.Tools.csproj -- packet-v4 --packet=Temp/final_decision_packet_active.json --out=Temp/final_decision_packet_v4.json
+      run: dotnet run --project src/dotnet/QuantEngine.Tools/QuantEngine.Tools.csproj -p:TreatWarningsAsErrors=true -- packet-v4 --packet=Temp/final_decision_packet_active.json --out=Temp/final_decision_packet_v4.json
 
     - name: Render Operational Report
-      run: dotnet run --project src/dotnet/QuantEngine.Tools/QuantEngine.Tools.csproj -- report --packet=Temp/final_decision_packet_active.json --out=Temp/operational_report.json
+      run: dotnet run --project src/dotnet/QuantEngine.Tools/QuantEngine.Tools.csproj -p:TreatWarningsAsErrors=true -- report --packet=Temp/final_decision_packet_active.json --out=Temp/operational_report.json
 
     - name: Validate Report Packet Sync
       run: python3 tools/validate_report_packet_sync_v1.py --packet Temp/final_decision_packet_active.json --report Temp/operational_report.json | tee Temp/validate_report_packet_sync_v1.json
diff --git a/src/dotnet/QuantEngine.Application/QuantEngine.Application.csproj b/src/dotnet/QuantEngine.Application/QuantEngine.Application.csproj
index ce16b8cc..f9926a95 100644
--- a/src/dotnet/QuantEngine.Application/QuantEngine.Application.csproj
+++ b/src/dotnet/QuantEngine.Application/QuantEngine.Application.csproj
@@ -9,6 +9,8 @@
   </ItemGroup>
 
   <PropertyGroup>
+    <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
+    <NoWarn>$(NoWarn);NU1603</NoWarn>
     <TargetFramework>net10.0</TargetFramework>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
diff --git a/src/dotnet/QuantEngine.Core.Tests/QuantEngine.Core.Tests.csproj b/src/dotnet/QuantEngine.Core.Tests/QuantEngine.Core.Tests.csproj
index 4c80110d..8859f645 100644
--- a/src/dotnet/QuantEngine.Core.Tests/QuantEngine.Core.Tests.csproj
+++ b/src/dotnet/QuantEngine.Core.Tests/QuantEngine.Core.Tests.csproj
@@ -1,6 +1,8 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
+    <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
+    <NoWarn>$(NoWarn);NU1603</NoWarn>
     <TargetFramework>net10.0</TargetFramework>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
diff --git a/src/dotnet/QuantEngine.Core/QuantEngine.Core.csproj b/src/dotnet/QuantEngine.Core/QuantEngine.Core.csproj
index b7601447..d4ac136d 100644
--- a/src/dotnet/QuantEngine.Core/QuantEngine.Core.csproj
+++ b/src/dotnet/QuantEngine.Core/QuantEngine.Core.csproj
@@ -1,6 +1,8 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
+    <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
+    <NoWarn>$(NoWarn);NU1603</NoWarn>
     <TargetFramework>net10.0</TargetFramework>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
diff --git a/src/dotnet/QuantEngine.Infrastructure/QuantEngine.Infrastructure.csproj b/src/dotnet/QuantEngine.Infrastructure/QuantEngine.Infrastructure.csproj
index d581d4ac..cf0130e6 100644
--- a/src/dotnet/QuantEngine.Infrastructure/QuantEngine.Infrastructure.csproj
+++ b/src/dotnet/QuantEngine.Infrastructure/QuantEngine.Infrastructure.csproj
@@ -17,6 +17,8 @@
   </ItemGroup>
 
   <PropertyGroup>
+    <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
+    <NoWarn>$(NoWarn);NU1603</NoWarn>
     <TargetFramework>net10.0</TargetFramework>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
diff --git a/src/dotnet/QuantEngine.Tools/QuantEngine.Tools.csproj b/src/dotnet/QuantEngine.Tools/QuantEngine.Tools.csproj
index 0cbb4351..c4dec772 100644
--- a/src/dotnet/QuantEngine.Tools/QuantEngine.Tools.csproj
+++ b/src/dotnet/QuantEngine.Tools/QuantEngine.Tools.csproj
@@ -1,6 +1,8 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
+    <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
+    <NoWarn>$(NoWarn);NU1603</NoWarn>
     <OutputType>Exe</OutputType>
     <TargetFramework>net10.0</TargetFramework>
     <ImplicitUsings>enable</ImplicitUsings>
diff --git a/src/dotnet/QuantEngine.Web/QuantEngine.Web.csproj b/src/dotnet/QuantEngine.Web/QuantEngine.Web.csproj
index 7cf44f87..a12a0985 100644
--- a/src/dotnet/QuantEngine.Web/QuantEngine.Web.csproj
+++ b/src/dotnet/QuantEngine.Web/QuantEngine.Web.csproj
@@ -19,6 +19,8 @@
   </ItemGroup>
 
   <PropertyGroup>
+    <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
+    <NoWarn>$(NoWarn);NU1603</NoWarn>
     <TargetFramework>net10.0</TargetFramework>
     <Nullable>enable</Nullable>
     <ImplicitUsings>enable</ImplicitUsings>