diff --git a/SourceKitLSPDevUtils/Sources/ConfigSchemaGen/ConfigSchemaGen.swift b/SourceKitLSPDevUtils/Sources/ConfigSchemaGen/ConfigSchemaGen.swift
index 0cef6465..bacc9751 100644
--- a/SourceKitLSPDevUtils/Sources/ConfigSchemaGen/ConfigSchemaGen.swift
+++ b/SourceKitLSPDevUtils/Sources/ConfigSchemaGen/ConfigSchemaGen.swift
@@ -1,3 +1,15 @@
+//===----------------------------------------------------------------------===//
+//
+// This source file is part of the Swift.org open source project
+//
+// Copyright (c) 2014 - 2024 Apple Inc. and the Swift project authors
+// Licensed under Apache License v2.0 with Runtime Library Exception
+//
+// See https://swift.org/LICENSE.txt for license information
+// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
+//
+//===----------------------------------------------------------------------===//
+
 import Foundation
 import SwiftParser
 import SwiftSyntax
diff --git a/SourceKitLSPDevUtils/Sources/ConfigSchemaGen/JSONSchema.swift b/SourceKitLSPDevUtils/Sources/ConfigSchemaGen/JSONSchema.swift
index 3d3c8f46..3aa9a656 100644
--- a/SourceKitLSPDevUtils/Sources/ConfigSchemaGen/JSONSchema.swift
+++ b/SourceKitLSPDevUtils/Sources/ConfigSchemaGen/JSONSchema.swift
@@ -1,3 +1,15 @@
+//===----------------------------------------------------------------------===//
+//
+// This source file is part of the Swift.org open source project
+//
+// Copyright (c) 2014 - 2024 Apple Inc. and the Swift project authors
+// Licensed under Apache License v2.0 with Runtime Library Exception
+//
+// See https://swift.org/LICENSE.txt for license information
+// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
+//
+//===----------------------------------------------------------------------===//
+
 @propertyWrapper
 final class HeapBox<T> {
   var wrappedValue: T
diff --git a/SourceKitLSPDevUtils/Sources/ConfigSchemaGen/OptionDocument.swift b/SourceKitLSPDevUtils/Sources/ConfigSchemaGen/OptionDocument.swift
index f4663d63..0bceff7e 100644
--- a/SourceKitLSPDevUtils/Sources/ConfigSchemaGen/OptionDocument.swift
+++ b/SourceKitLSPDevUtils/Sources/ConfigSchemaGen/OptionDocument.swift
@@ -1,3 +1,15 @@
+//===----------------------------------------------------------------------===//
+//
+// This source file is part of the Swift.org open source project
+//
+// Copyright (c) 2014 - 2024 Apple Inc. and the Swift project authors
+// Licensed under Apache License v2.0 with Runtime Library Exception
+//
+// See https://swift.org/LICENSE.txt for license information
+// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
+//
+//===----------------------------------------------------------------------===//
+
 /// Generates a markdown document for the configuration file based on the schema.
 struct OptionDocumentBuilder {
   static let preamble = """
diff --git a/SourceKitLSPDevUtils/Sources/ConfigSchemaGen/OptionSchema.swift b/SourceKitLSPDevUtils/Sources/ConfigSchemaGen/OptionSchema.swift
index 8ba45cfe..c7aa5b17 100644
--- a/SourceKitLSPDevUtils/Sources/ConfigSchemaGen/OptionSchema.swift
+++ b/SourceKitLSPDevUtils/Sources/ConfigSchemaGen/OptionSchema.swift
@@ -1,3 +1,15 @@
+//===----------------------------------------------------------------------===//
+//
+// This source file is part of the Swift.org open source project
+//
+// Copyright (c) 2014 - 2024 Apple Inc. and the Swift project authors
+// Licensed under Apache License v2.0 with Runtime Library Exception
+//
+// See https://swift.org/LICENSE.txt for license information
+// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
+//
+//===----------------------------------------------------------------------===//
+
 import SwiftSyntax
 
 /// Intermediate type schema representation for option types derived from Swift
diff --git a/SourceKitLSPDevUtils/Sources/ConfigSchemaGen/TypeDeclResolver.swift b/SourceKitLSPDevUtils/Sources/ConfigSchemaGen/TypeDeclResolver.swift
index f5022f97..bcf9f347 100644
--- a/SourceKitLSPDevUtils/Sources/ConfigSchemaGen/TypeDeclResolver.swift
+++ b/SourceKitLSPDevUtils/Sources/ConfigSchemaGen/TypeDeclResolver.swift
@@ -1,3 +1,15 @@
+//===----------------------------------------------------------------------===//
+//
+// This source file is part of the Swift.org open source project
+//
+// Copyright (c) 2014 - 2024 Apple Inc. and the Swift project authors
+// Licensed under Apache License v2.0 with Runtime Library Exception
+//
+// See https://swift.org/LICENSE.txt for license information
+// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
+//
+//===----------------------------------------------------------------------===//
+
 import SwiftSyntax
 
 /// Resolves type declarations from Swift syntax nodes
diff --git a/SourceKitLSPDevUtils/Sources/SourceKitLSPDevUtils/Commands/GenerateConfigSchema.swift b/SourceKitLSPDevUtils/Sources/SourceKitLSPDevUtils/Commands/GenerateConfigSchema.swift
index 27d581f8..e243cf79 100644
--- a/SourceKitLSPDevUtils/Sources/SourceKitLSPDevUtils/Commands/GenerateConfigSchema.swift
+++ b/SourceKitLSPDevUtils/Sources/SourceKitLSPDevUtils/Commands/GenerateConfigSchema.swift
@@ -1,3 +1,15 @@
+//===----------------------------------------------------------------------===//
+//
+// This source file is part of the Swift.org open source project
+//
+// Copyright (c) 2014 - 2024 Apple Inc. and the Swift project authors
+// Licensed under Apache License v2.0 with Runtime Library Exception
+//
+// See https://swift.org/LICENSE.txt for license information
+// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
+//
+//===----------------------------------------------------------------------===//
+
 import ArgumentParser
 import ConfigSchemaGen
 
diff --git a/SourceKitLSPDevUtils/Sources/SourceKitLSPDevUtils/SourceKitLSPDevUtils.swift b/SourceKitLSPDevUtils/Sources/SourceKitLSPDevUtils/SourceKitLSPDevUtils.swift
index 1714c38e..3a4f01d4 100644
--- a/SourceKitLSPDevUtils/Sources/SourceKitLSPDevUtils/SourceKitLSPDevUtils.swift
+++ b/SourceKitLSPDevUtils/Sources/SourceKitLSPDevUtils/SourceKitLSPDevUtils.swift
@@ -1,3 +1,15 @@
+//===----------------------------------------------------------------------===//
+//
+// This source file is part of the Swift.org open source project
+//
+// Copyright (c) 2014 - 2024 Apple Inc. and the Swift project authors
+// Licensed under Apache License v2.0 with Runtime Library Exception
+//
+// See https://swift.org/LICENSE.txt for license information
+// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
+//
+//===----------------------------------------------------------------------===//
+
 import ArgumentParser
 
 @main