The June 2025 release of the Azure SDK has been announced with multiple updates, featuring the launch of Azure AI Agents Persistent 1.0.0 for .NET. This version offers an advanced solution for the creation, management, and execution of AI agents across various sessions. The Azure Identity libraries have enhanced DefaultAzureCredential, enabling developers to select between Deployed service credentials or 'Developer tool' credentials. The Cosmos DB library for JavaScript has unveiled a new Bulk API, enhanced resilience, dynamic congestion control, and the WeightedRankFusion query feature.

Azure SDK Release (June 2025)

Azure SDK releases every month. This post includes the June 2025's highlights and release notes.

Release highlights

Azure AI Agents Persistent 1.0.0 for .NET

The  Azure AI Agents Persistent client library is now generally available for .NET. This is the first stable release of the Azure AI Agents Persistent client library, which provides a powerful toolset for creating, managing, and running AI agents that persist across multiple sessions. The library enables seamless integration with various grounding tools, including Azure AI Search, Bing Search, and more.

Azure Identity libraries: DefaultAzureCredential customization improvement

The Azure Identity libraries added support for an AZURE_TOKEN_CREDENTIALS environment variable to DefaultAzureCredential. This feature allows developers to choose between Deployed service or ‘Developer tool’ credentials by setting the environment variable to prod or dev, respectively. Minimum package version requirements are as follows:

• .NET (1.14.0)
• C++ (1.12.0)
• Go (1.10.0)
• Java (1.16.1)
• JavaScript (4.10.0)
• Python (1.23.0)

Cosmos DB 4.4.0 for JavaScript

The  Cosmos DB library for JavaScript introduces a new Bulk API with significant enhancements. The new executeBulkOperations API removes the previous 100-operation limit, adds operation-level retries for improved resilience, and introduces dynamic congestion control to optimize performance based on real-time system feedback. Additionally, this release adds the WeightedRankFusion query feature and support of component weights for weighted rank fusion in Hybrid Search.

Azure SDK Release (June 2025)