docs(release): update changelog for the 2026-06 release (#16184)

Author: scotthart

CHANGELOG.md

@@ -7,7 +7,7 @@ breaking changes in the upcoming 4.x release. This release is scheduled for
 **NOTE**: Please refer to the [V3 Migration Guide](/doc/v3-migration-guide.md) 
 for details on updating existing applications using v1.x.y or v2.x.y.
 
-## v3.6.0 - TBD
+## v3.6.0 - 2026-06
 
 ### New Libraries
 
@@ -26,6 +26,30 @@ the APIs in these libraries are stable, and are ready for production use.
   are now supported for REST endpoints. Support for gRPC endpoints will be
   available in a future release.
 
+### [Storage](/google/cloud/storage/README.md)
+
+- fix(storage): avoid premature flush completion and concurrent writes in AsyncWriterConnectionBuffered ([#16169](https://github.com/googleapis/google-cloud-cpp/pull/16169))
+- feat(storage): implement GCS overrun logging and resume prevention ([#16150](https://github.com/googleapis/google-cloud-cpp/pull/16150))
+- fix(storage): add Close() support to AsyncWriterConnectionBuffered ([#16145](https://github.com/googleapis/google-cloud-cpp/pull/16145))
+- fix(storage): Set the idempotency token for async rewrites ([#16114](https://github.com/googleapis/google-cloud-cpp/pull/16114))
+- fix(storage): Add telemetry tracing support for async stream Close() ([#16118](https://github.com/googleapis/google-cloud-cpp/pull/16118))
+- feat(storage): Add full object read checksum validation for Open ([#16120](https://github.com/googleapis/google-cloud-cpp/pull/16120))
+- fix(storage): use server-reported size and crc on stream reconnect to avoid duplicate writes ([#16115](https://github.com/googleapis/google-cloud-cpp/pull/16115))
+- fix(storage): Implement clean half-close stream teardown for appendable uploads ([#16112](https://github.com/googleapis/google-cloud-cpp/pull/16112))
+- feat(storage): Add full object checksum validation for appendable uploads ([#16110](https://github.com/googleapis/google-cloud-cpp/pull/16110))
+- feat(storage): Add read chunkwise checksum validation for sync grpc read ([#16107](https://github.com/googleapis/google-cloud-cpp/pull/16107))
+- fix(storage): Resolve potential race condition in AsyncWriterConnectionImpl ([#16099](https://github.com/googleapis/google-cloud-cpp/pull/16099))
+- feat(storage): Add delete object source field in ComposeObject API ([#16094](https://github.com/googleapis/google-cloud-cpp/pull/16094))
+- feat(storage): Extend idempotency token use to all async mutation operations ([#16100](https://github.com/googleapis/google-cloud-cpp/pull/16100))
+
+### [Common Libraries](/google/cloud/README.md)
+
+- fix: remove deprecated ATOMIC_VAR_INIT usage ([#16127](https://github.com/googleapis/google-cloud-cpp/pull/16127))
+- fix(testing_util): link opentelemetry-cpp SDK as PUBLIC ([#16101](https://github.com/googleapis/google-cloud-cpp/pull/16101))
+
+### [Google APIs interface definitions](https://github.com/googleapis/googleapis)
+
+- This release is based on definitions as of [2026-05-25T07:03:03-07:00](https://github.com/googleapis/googleapis/tree/ef19b7b7a73f19f33ab86c5b3603e9590025acd7)
 
 ## v3.5.0 - 2026-05
 

CMakeLists.txt

@@ -23,7 +23,7 @@ project(
     google-cloud-cpp
     VERSION 3.6.0
     LANGUAGES CXX)
-set(PROJECT_VERSION_PRE_RELEASE "rc")
+set(PROJECT_VERSION_PRE_RELEASE "")
 
 if (NOT "${PROJECT_VERSION_PRE_RELEASE}" STREQUAL "")
     set(PROJECT_VERSION "${PROJECT_VERSION}-${PROJECT_VERSION_PRE_RELEASE}")

MODULE.bazel

@@ -16,7 +16,7 @@
 
 module(
     name = "google_cloud_cpp",
-    version = "3.6.0-rc",  # Updated by CMake
+    version = "3.6.0",  # Updated by CMake
     compatibility_level = 3,  # Updated by CMake
 )
 

google/cloud/internal/version_info.h

@@ -21,6 +21,6 @@
 #define GOOGLE_CLOUD_CPP_VERSION_MINOR 6
 // NOLINTNEXTLINE(modernize-macro-to-enum)
 #define GOOGLE_CLOUD_CPP_VERSION_PATCH 0
-#define GOOGLE_CLOUD_CPP_VERSION_PRE_RELEASE "rc"
+#define GOOGLE_CLOUD_CPP_VERSION_PRE_RELEASE ""
 
 #endif  // GOOGLE_CLOUD_CPP_GOOGLE_CLOUD_INTERNAL_VERSION_INFO_H