diff --git a/Version.props b/Version.props
index 3799ab2..c2abecd 100644
--- a/Version.props
+++ b/Version.props
@@ -20,9 +20,9 @@
 
     <!-- Dependency versions -->
     <PropertyGroup>
-        <ANcpLuaAnalyzersVersion>1.29.1</ANcpLuaAnalyzersVersion>
+        <ANcpLuaAnalyzersVersion>1.29.2</ANcpLuaAnalyzersVersion>
         <MeziantouAnalyzerVersion>3.0.84</MeziantouAnalyzerVersion>
-        <ANcpLuaRoslynUtilitiesVersion>2.2.9</ANcpLuaRoslynUtilitiesVersion>
+        <ANcpLuaRoslynUtilitiesVersion>2.2.12</ANcpLuaRoslynUtilitiesVersion>
         <MicrosoftCodeAnalysisAnalyzersVersion>5.3.0</MicrosoftCodeAnalysisAnalyzersVersion>
         <MicrosoftCodeAnalysisCSharpVersion>5.3.0</MicrosoftCodeAnalysisCSharpVersion>
         <MicrosoftCodeAnalysisBannedApiAnalyzersVersion>3.3.4</MicrosoftCodeAnalysisBannedApiAnalyzersVersion>
diff --git a/src/ErrorOrX.Generators/Analyzers/ErrorOrEndpointAnalyzer.cs b/src/ErrorOrX.Generators/Analyzers/ErrorOrEndpointAnalyzer.cs
index 7593101..a3f8025 100644
--- a/src/ErrorOrX.Generators/Analyzers/ErrorOrEndpointAnalyzer.cs
+++ b/src/ErrorOrX.Generators/Analyzers/ErrorOrEndpointAnalyzer.cs
@@ -1,3 +1,4 @@
+using ANcpLua.Roslyn.Utilities;
 using ErrorOr.Generators;
 using Microsoft.CodeAnalysis;
 using Microsoft.CodeAnalysis.Diagnostics;
@@ -388,8 +389,7 @@ private static bool IsErrorOr(ITypeSymbol type)
 
             // Extract pattern from constructor arguments
             var patternIndex = attrName.Contains("ErrorOrEndpoint") ? 1 : 0;
-            if (attr.ConstructorArguments.Length > patternIndex &&
-                attr.ConstructorArguments[patternIndex].Value is string p)
+            if (attr.GetConstructorArgument<string>(patternIndex) is { } p)
             {
                 pattern = p;
             }
diff --git a/src/ErrorOrX.Generators/Core/ErrorOrEndpointGenerator.Initialize.cs b/src/ErrorOrX.Generators/Core/ErrorOrEndpointGenerator.Initialize.cs
index be4441e..97a6f1d 100644
--- a/src/ErrorOrX.Generators/Core/ErrorOrEndpointGenerator.Initialize.cs
+++ b/src/ErrorOrX.Generators/Core/ErrorOrEndpointGenerator.Initialize.cs
@@ -1,4 +1,5 @@
 using ANcpLua.Roslyn.Utilities.Models;
+using ANcpLua.Roslyn.Utilities;
 using ErrorOr.Analyzers;
 using Microsoft.CodeAnalysis;
 using Microsoft.CodeAnalysis.CSharp.Syntax;
@@ -477,8 +478,7 @@ private static (HttpVerb? Verb, string Pattern, string? CustomMethod) ExtractHtt
 
         // Extract pattern - index differs for ErrorOrEndpoint (has httpMethod arg first)
         var patternIndex = isErrorOrEndpoint ? 1 : 0;
-        var pattern = attr.ConstructorArguments.Length > patternIndex &&
-                      attr.ConstructorArguments[patternIndex].Value is string p
+        var pattern = attr.GetConstructorArgument<string>(patternIndex) is { } p
             ? p
             : "/";
 
diff --git a/src/ErrorOrX.Generators/Core/ErrorOrEndpointGenerator.ParameterBinding.cs b/src/ErrorOrX.Generators/Core/ErrorOrEndpointGenerator.ParameterBinding.cs
index 1920e85..f52d30b 100644
--- a/src/ErrorOrX.Generators/Core/ErrorOrEndpointGenerator.ParameterBinding.cs
+++ b/src/ErrorOrX.Generators/Core/ErrorOrEndpointGenerator.ParameterBinding.cs
@@ -1,4 +1,5 @@
 using System.Text.RegularExpressions;
+using ANcpLua.Roslyn.Utilities;
 using ANcpLua.Roslyn.Utilities.Matching;
 using ANcpLua.Roslyn.Utilities.Models;
 using ErrorOr.Analyzers;
@@ -860,9 +861,9 @@ private static (bool IsNullable, bool IsNonNullableValueType) GetParameterNullab
         var matcher = new AttributeNameMatcher(WellKnownTypes.FromKeyedServicesAttribute);
         var attr = parameter.GetAttributes().FirstOrDefault(a => matcher.IsMatch(a.AttributeClass));
 
-        if (attr is null || attr.ConstructorArguments.Length is 0) return null;
+        if (attr is null) return null;
 
-        var val = attr.ConstructorArguments[0].Value;
+        var val = attr.GetConstructorArgument<object>(0);
         return val switch { string s => $"\"{s}\"", null => null, _ => val.ToString() };
     }
 
@@ -892,8 +893,7 @@ private static bool HasParameterAttribute(ISymbol parameter, ErrorOrContext cont
             }
         }
 
-        if (attr.ConstructorArguments.Length > 0 &&
-            attr.ConstructorArguments[0].Value is string ctorArg &&
+        if (attr.GetConstructorArgument<string>(0) is { } ctorArg &&
             !string.IsNullOrWhiteSpace(ctorArg))
         {
             return ctorArg;
diff --git a/src/ErrorOrX.Generators/ErrorOrX.Generators.csproj b/src/ErrorOrX.Generators/ErrorOrX.Generators.csproj
index c75bf04..3b73aa4 100644
--- a/src/ErrorOrX.Generators/ErrorOrX.Generators.csproj
+++ b/src/ErrorOrX.Generators/ErrorOrX.Generators.csproj
@@ -29,8 +29,15 @@
             ANcpLua.Roslyn.Utilities.Sources (AsyncBatchingWorkQueue, IncrementalValuesProviderExtensions).
             These are deliberate try/catch patterns in resilient infrastructure code.
             .editorconfig cannot suppress diagnostics in NuGet cache paths.
+
+            AL0140: The generator emitter code intentionally relies on local type inference for
+            Roslyn syntax construction where explicit types add noise rather than safety.
+
+            RS1035: ANcpLua.Roslyn.Utilities.Sources contains environment-variable checks in
+            source-package infrastructure; suppress here until the upstream package removes that
+            analyzer-host API usage.
         -->
-        <NoWarn>$(NoWarn);NU5128;RS1038;ERP022</NoWarn>
+        <NoWarn>$(NoWarn);NU5128;RS1038;ERP022;AL0140;RS1035</NoWarn>
         <PublishRepositoryUrl>true</PublishRepositoryUrl>
         <EmbedUntrackedSources>true</EmbedUntrackedSources>
         <IncludeSymbols>false</IncludeSymbols>
diff --git a/src/ErrorOrX.Generators/OpenApiTransformerGenerator.cs b/src/ErrorOrX.Generators/OpenApiTransformerGenerator.cs
index 9408966..943e05f 100644
--- a/src/ErrorOrX.Generators/OpenApiTransformerGenerator.cs
+++ b/src/ErrorOrX.Generators/OpenApiTransformerGenerator.cs
@@ -1,3 +1,4 @@
+using ANcpLua.Roslyn.Utilities;
 using Microsoft.CodeAnalysis;
 using Microsoft.CodeAnalysis.CSharp.Syntax;
 using Microsoft.CodeAnalysis.Text;
@@ -110,8 +111,7 @@ private static IncrementalValuesProvider<OpenApiEndpointInfo> CreateEndpointProv
 
     private static string GetPattern(AttributeData attr)
     {
-        if (attr.ConstructorArguments.Length > 0 &&
-            attr.ConstructorArguments[0].Value is string p &&
+        if (attr.GetConstructorArgument<string>(0) is { } p &&
             !string.IsNullOrWhiteSpace(p))
         {
             return p;
@@ -122,10 +122,8 @@ attr.ConstructorArguments[0].Value is string p &&
 
     private static (string? httpMethod, string? pattern) GetBaseAttributeInfo(AttributeData attr)
     {
-        if (attr.ConstructorArguments.Length < 2) return (null, null);
-
-        var method = attr.ConstructorArguments[0].Value as string;
-        var pattern = attr.ConstructorArguments[1].Value as string;
+        var method = attr.GetConstructorArgument<string>(0);
+        var pattern = attr.GetConstructorArgument<string>(1);
 
         return string.IsNullOrWhiteSpace(method)
             ? (null, null)