diff --git a/OpenRA.Mods.Common/UtilityCommands/ExtractSpriteSequenceDocsCommand.cs b/OpenRA.Mods.Common/UtilityCommands/ExtractSpriteSequenceDocsCommand.cs
index b640f43d2b..94f2ce4d49 100644
--- a/OpenRA.Mods.Common/UtilityCommands/ExtractSpriteSequenceDocsCommand.cs
+++ b/OpenRA.Mods.Common/UtilityCommands/ExtractSpriteSequenceDocsCommand.cs
@@ -50,6 +50,7 @@ namespace OpenRA.Mods.Common.UtilityCommands
 		static string GenerateJson(string version, IEnumerable<Type> sequenceTypes)
 		{
 			var relatedEnumTypes = new HashSet<Type>();
+			var pdbReaderCache = Utilities.CreatePdbReaderCache();
 
 			var sequenceTypesInfo = sequenceTypes
 				.Where(x => !x.ContainsGenericParameters && !x.IsAbstract)
@@ -58,6 +59,7 @@ namespace OpenRA.Mods.Common.UtilityCommands
 					type.Namespace,
 					type.Name,
 					Description = string.Join(" ", Utility.GetCustomAttributes<DescAttribute>(type, false).SelectMany(d => d.Lines)),
+					Filename = Utilities.GetSourceFilenameFromPdb(type, pdbReaderCache),
 					InheritedTypes = type.BaseTypes()
 						.Select(y => y.Name)
 						.Where(y => y != type.Name && y != "Object"),
diff --git a/OpenRA.Mods.Common/UtilityCommands/ExtractTraitDocsCommand.cs b/OpenRA.Mods.Common/UtilityCommands/ExtractTraitDocsCommand.cs
index 95ee951600..eac96b8330 100644
--- a/OpenRA.Mods.Common/UtilityCommands/ExtractTraitDocsCommand.cs
+++ b/OpenRA.Mods.Common/UtilityCommands/ExtractTraitDocsCommand.cs
@@ -48,6 +48,7 @@ namespace OpenRA.Mods.Common.UtilityCommands
 		static string GenerateJson(string version, IEnumerable<Type> traitTypes, ObjectCreator objectCreator)
 		{
 			var relatedEnumTypes = new HashSet<Type>();
+			var pdbReaderCache = Utilities.CreatePdbReaderCache();
 
 			var traitTypesInfo = traitTypes
 				.Where(x => !x.ContainsGenericParameters && !x.IsAbstract)
@@ -56,6 +57,7 @@ namespace OpenRA.Mods.Common.UtilityCommands
 					type.Namespace,
 					Name = type.Name.EndsWith("Info", StringComparison.Ordinal) ? type.Name[..^4] : type.Name,
 					Description = string.Join(" ", Utility.GetCustomAttributes<DescAttribute>(type, false).SelectMany(d => d.Lines)),
+					Filename = Utilities.GetSourceFilenameFromPdb(type, pdbReaderCache),
 					RequiresTraits = RequiredTraitTypes(type)
 						.Select(y => y.Name),
 					InheritedTypes = type.BaseTypes()
diff --git a/OpenRA.Mods.Common/UtilityCommands/ExtractWeaponDocsCommand.cs b/OpenRA.Mods.Common/UtilityCommands/ExtractWeaponDocsCommand.cs
index b9e8f285a8..4d3cf3e7f9 100644
--- a/OpenRA.Mods.Common/UtilityCommands/ExtractWeaponDocsCommand.cs
+++ b/OpenRA.Mods.Common/UtilityCommands/ExtractWeaponDocsCommand.cs
@@ -53,6 +53,7 @@ namespace OpenRA.Mods.Common.UtilityCommands
 		static string GenerateJson(string version, IEnumerable<Type> weaponTypes, ObjectCreator objectCreator)
 		{
 			var relatedEnumTypes = new HashSet<Type>();
+			var pdbReaderCache = Utilities.CreatePdbReaderCache();
 
 			var weaponTypesInfo = weaponTypes
 				.Where(x => !x.ContainsGenericParameters && !x.IsAbstract)
@@ -61,6 +62,7 @@ namespace OpenRA.Mods.Common.UtilityCommands
 					type.Namespace,
 					Name = type.Name.EndsWith("Info", StringComparison.Ordinal) ? type.Name[..^4] : type.Name,
 					Description = string.Join(" ", Utility.GetCustomAttributes<DescAttribute>(type, false).SelectMany(d => d.Lines)),
+					Filename = Utilities.GetSourceFilenameFromPdb(type, pdbReaderCache),
 					InheritedTypes = type.BaseTypes()
 						.Select(y => y.Name)
 						.Where(y => y != type.Name && y != $"{type.Name}Info" && y != "Object"),
diff --git a/OpenRA.Mods.Common/UtilityCommands/Utilities.cs b/OpenRA.Mods.Common/UtilityCommands/Utilities.cs
index 48e61433c3..786767c79a 100644
--- a/OpenRA.Mods.Common/UtilityCommands/Utilities.cs
+++ b/OpenRA.Mods.Common/UtilityCommands/Utilities.cs
@@ -11,7 +11,12 @@
 
 using System;
 using System.IO;
+using System.Linq;
+using System.Reflection;
+using System.Reflection.Metadata;
+using System.Reflection.Metadata.Ecma335;
 using OpenRA.FileSystem;
+using OpenRA.Primitives;
 
 namespace OpenRA.Mods.Common.UtilityCommands
 {
@@ -48,5 +53,51 @@ namespace OpenRA.Mods.Common.UtilityCommands
 			var topLevelNodes = MiniYaml.Load(fs, manifestNodes, mapProperty);
 			return topLevelNodes.FirstOrDefault(n => n.Key == key);
 		}
+
+		public static Cache<string, MetadataReader> CreatePdbReaderCache()
+		{
+			return new Cache<string, MetadataReader>(assemblyPath =>
+			{
+				var pdbPath = Path.ChangeExtension(assemblyPath, "pdb");
+				using var fs = new FileStream(pdbPath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
+				var provider = MetadataReaderProvider.FromPortablePdbStream(fs);
+				return provider.GetMetadataReader();
+			});
+		}
+
+		public static string GetSourceFilenameFromPdb(Type type, Cache<string, MetadataReader> pdbReaderCache)
+		{
+			var filename = "(unknown)";
+			try
+			{
+				var pdb = pdbReaderCache[type.Assembly.Location];
+
+				// Enumerate over ctors before other methods (in case this type is defined across multiple files)
+				var methodInfos = type.GetConstructors().Cast<MemberInfo>().Concat(type.GetMethods());
+				foreach (var mi in methodInfos)
+				{
+					var definitionHandle = (MethodDefinitionHandle)MetadataTokens.Handle(mi.MetadataToken);
+					var sequencePoints = pdb.GetMethodDebugInformation(definitionHandle.ToDebugInformationHandle())
+						.GetSequencePoints()
+						.ToList();
+
+					if (sequencePoints.Count == 0)
+						continue;
+
+					filename = pdb.GetString(pdb.GetDocument(sequencePoints[0].Document).Name);
+
+					// Remove the common path prefix to give a path relative to the repository root
+					for (var i = 0; i < filename.Length; i++)
+						if (filename[i] != type.Assembly.Location[i])
+							return filename[i..];
+				}
+			}
+			catch
+			{
+				// Ignored
+			}
+
+			return filename;
+		}
 	}
 }