diff --git a/wire-schema/src/jvmMain/resources/google/protobuf/descriptor.proto b/wire-schema/src/jvmMain/resources/google/protobuf/descriptor.proto
index dfabac4168..6011f72c41 100644
--- a/wire-schema/src/jvmMain/resources/google/protobuf/descriptor.proto
+++ b/wire-schema/src/jvmMain/resources/google/protobuf/descriptor.proto
@@ -55,6 +55,13 @@ option optimize_for = SPEED;
 // files it parses.
 message FileDescriptorSet {
   repeated FileDescriptorProto file = 1;
+
+  // Extensions for tooling.
+  extensions 536000000 [declaration = {
+    number: 536000000
+    type: ".buf.descriptor.v1.FileDescriptorSetExtension"
+    full_name: ".buf.descriptor.v1.buf_file_descriptor_set_extension"
+  }];
 }
 
 // The full set of known editions.
@@ -80,7 +87,7 @@ enum Edition {
   EDITION_2024 = 1001;
 
   // Placeholder editions for testing feature resolution.  These should not be
-  // used or relyed on outside of tests.
+  // used or relied on outside of tests.
   EDITION_1_TEST_ONLY = 1;
   EDITION_2_TEST_ONLY = 2;
   EDITION_99997_TEST_ONLY = 99997;
@@ -732,8 +739,6 @@ message FieldOptions {
   optional bool debug_redact = 16 [default = false];
 
   // If set to RETENTION_SOURCE, the option will be omitted from the binary.
-  // Note: as of January 2023, support for this is in progress and does not yet
-  // have an effect (b/264593489).
   enum OptionRetention {
     RETENTION_UNKNOWN = 0;
     RETENTION_RUNTIME = 1;
@@ -744,8 +749,7 @@ message FieldOptions {
 
   // This indicates the types of entities that the field may apply to when used
   // as an option. If it is unset, then the field may be freely used as an
-  // option on any kind of entity. Note: as of January 2023, support for this is
-  // in progress and does not yet have an effect (b/264593489).
+  // option on any kind of entity.
   enum OptionTargetType {
     TARGET_TYPE_UNKNOWN = 0;
     TARGET_TYPE_FILE = 1;
@@ -1255,6 +1259,13 @@ message SourceCodeInfo {
     optional string trailing_comments = 4;
     repeated string leading_detached_comments = 6;
   }
+
+  // Extensions for tooling.
+  extensions 536000000 [declaration = {
+    number: 536000000
+    type: ".buf.descriptor.v1.SourceCodeInfoExtension"
+    full_name: ".buf.descriptor.v1.buf_source_code_info_extension"
+  }];
 }
 
 // Describes the relationship between generated code and its original source