Azure/azure-sdk-for-net Azure.AI.AgentServer.Core_1.0.0-beta.26

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1.0.0-beta.26 (2026-06-28)

Features Added

• Container protocol version 2.0.0 support: added the platform identity header constants PlatformHeaders.UserId (x-agent-user-id) and PlatformHeaders.FoundryCallId (x-agent-foundry-call-id).
• Added FoundryEnvironment.AgentId exposing the agent's stable GUID from the FOUNDRY_AGENT_ID environment variable.
• Added the request-scoped FoundryAgentRequestContext (AsyncLocal-backed, never-null Current) that captures the inbound x-agent-foundry-call-id / x-agent-user-id via an SDK middleware, and FoundryCallIdHandler (a DelegatingHandler) that echoes only the call ID on outbound Foundry-bound HttpClient calls (x-agent-user-id is never echoed). The .NET analogue of the Python SDK's get_request_context().

Breaking Changes

• Renamed IsolationContext to PlatformContext. Its members are now UserIdKey (from x-agent-user-id) and CallId (from x-agent-foundry-call-id), replacing UserIsolationKey / ChatIsolationKey.
• Replaced the PlatformHeaders.UserIsolationKey / PlatformHeaders.ChatIsolationKey constants with PlatformHeaders.UserId and PlatformHeaders.FoundryCallId per container protocol version 2.0.0.