diff --git a/src/TickerQ.SourceGenerator/TickerQIncrementalSourceGenerator.cs b/src/TickerQ.SourceGenerator/TickerQIncrementalSourceGenerator.cs
index 0d43d98d..26348dff 100644
--- a/src/TickerQ.SourceGenerator/TickerQIncrementalSourceGenerator.cs
+++ b/src/TickerQ.SourceGenerator/TickerQIncrementalSourceGenerator.cs
@@ -33,36 +33,44 @@ public void Initialize(IncrementalGeneratorInitializationContext context)
             var compilationAndMethods = context.CompilationProvider
                 .Combine(tickerMethods.Collect());
 
-            context.RegisterSourceOutput(compilationAndMethods, (productionContext, source) =>
+            var configOptionsProvider = context.AnalyzerConfigOptionsProvider;
+
+            context.RegisterSourceOutput(compilationAndMethods.Combine(configOptionsProvider), (productionContext, source) =>
             {
-                var (compilation, methodPairs) = source;
+                var ((compilation, methodPairs), configOptions) = source;
 
                 if (compilation.Assembly.Name == "TickerQ")
                     return;
 
+                // Prefer RootNamespace from build properties, fall back to sanitized assembly name
+                configOptions.GlobalOptions.TryGetValue("build_property.RootNamespace", out var rootNamespace);
+                var effectiveNamespace = !string.IsNullOrEmpty(rootNamespace)
+                    ? rootNamespace
+                    : SourceGeneratorUtilities.SanitizeNamespace(compilation.Assembly.Name);
+
                 // Generate constructor calls (no need for class conflict detection since we always use full names)
-                var constructorCalls = BuildConstructorMethodCalls(methodPairs, compilation, compilation.Assembly.Name).ToList();
+                var constructorCalls = BuildConstructorMethodCalls(methodPairs, compilation, effectiveNamespace).ToList();
                 
                 // Generate delegates and detect type conflicts for generic types
-                var initialDelegatesWithMetadata = BuildTickerFunctionDelegates(methodPairs, compilation, productionContext, compilation.Assembly.Name).ToList();
+                var initialDelegatesWithMetadata = BuildTickerFunctionDelegates(methodPairs, compilation, productionContext, effectiveNamespace).ToList();
                 var typeNames = initialDelegatesWithMetadata.Select(d => d.Item2.GenericTypeName).Where(t => !string.IsNullOrEmpty(t)).ToList();
                 var typeNameConflicts = DetectTypeNameConflicts(typeNames);
-                
+
                 // Regenerate delegates with type conflict information for generic types
-                var delegatesWithMetadata = BuildTickerFunctionDelegates(methodPairs, compilation, productionContext, compilation.Assembly.Name, null, typeNameConflicts).ToList();
-                
+                var delegatesWithMetadata = BuildTickerFunctionDelegates(methodPairs, compilation, productionContext, effectiveNamespace, null, typeNameConflicts).ToList();
+
                 // Collect namespaces from the source types
                 var sourceNamespaces = NamespaceCollector.CollectNamespacesFromSourceTypes(methodPairs, compilation);
-                
+
                 // Extract data once to avoid multiple enumeration
                 var delegateCodes = delegatesWithMetadata.Select(x => x.DelegateCode).ToList();
                 var requestTypes = delegatesWithMetadata.Select(x => x.Item2).ToList();
-                
+
                 var generatedCode = GenerateSourceWithFullNamespaces(
                     delegateCodes,
                     constructorCalls,
                     requestTypes,
-                    compilation.Assembly.Name,
+                    effectiveNamespace,
                     typeNameConflicts
                 );
 
diff --git a/src/TickerQ.SourceGenerator/Utilities/SourceGeneratorUtilities.cs b/src/TickerQ.SourceGenerator/Utilities/SourceGeneratorUtilities.cs
index 5e77a77d..7c0be993 100644
--- a/src/TickerQ.SourceGenerator/Utilities/SourceGeneratorUtilities.cs
+++ b/src/TickerQ.SourceGenerator/Utilities/SourceGeneratorUtilities.cs
@@ -213,6 +213,39 @@ private static string ExtractNamespaceFromTypeName(string fullTypeName)
             var lastDotIndex = fullTypeName.LastIndexOf('.');
             return lastDotIndex > 0 ? fullTypeName.Substring(0, lastDotIndex) : string.Empty;
         }
+
+        /// <summary>
+        /// Sanitizes an assembly name into a valid C# namespace identifier.
+        /// Replaces invalid characters (e.g. dashes) with underscores, and prepends
+        /// an underscore if the result starts with a digit.
+        /// </summary>
+        public static string SanitizeNamespace(string name)
+        {
+            if (string.IsNullOrEmpty(name))
+                return name;
+
+            var sb = new System.Text.StringBuilder(name.Length);
+            for (var i = 0; i < name.Length; i++)
+            {
+                var c = name[i];
+                if (c == '.' || char.IsLetterOrDigit(c) || c == '_')
+                    sb.Append(c);
+                else
+                    sb.Append('_');
+            }
+
+            var result = sb.ToString();
+
+            // Each segment between dots must not start with a digit
+            var segments = result.Split('.');
+            for (var i = 0; i < segments.Length; i++)
+            {
+                if (segments[i].Length > 0 && char.IsDigit(segments[i][0]))
+                    segments[i] = "_" + segments[i];
+            }
+
+            return string.Join(".", segments);
+        }
     }
 
     /// <summary>