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1. v1.39.0

   May 8, 2026

   GitHub release ↗PyPI 1.39.0 ↗

   🎉 First-time contributors@aidandaly24

   ✦ Features 4

   • enable openai provider use aws profilemodel
   • add context window limit lookup tablecontext
   • add useNativeTokenCount flag to skip token counting API calls
   • implement full A2A task lifecycle state supporta2a

   ⊘ Fixes 5

   • include root cause in MCPClientInitializationError message
   • fix count tokens for bedrock modelsmodel
   • cache unsupported models for bedrocks token counting
   • correct MCPClient.__exit__ and stop() type annotations
   • integration test updates

← Olderv1.38.0Newer →v1.40.0