New Libraries

We are happy to announce the following GA libraries. Unless specifically noted,
the APIs in these libraries are stable, and are ready for production use.

• Cloud API Registry
• Audit Manager
• GKE Recommender

Spanner

• feat(spanner): define IsolationLevel enum for Spanner transactions (#15853)

Storage

• feat(storage): take async client out of experimental (#15573)
• fix(storage): add extra validation for type in object_metadata_parser (#15864)
• feat(storage): Update the write handle while performing appendable object upload (#15889)
• feat(storage): add flag for enable and disable multi stream feature. (#15893)
• fix(storage): gRPC misuse causing crashes due to concurrent writes from Flush() and Write() (#15802)

Google APIs interface definitions

• This release is based on definitions as of 2026-01-30T21:16:31-08:00