Anthropic SDK Python v0.115.0: Event Delta Streaming & More

Anthropic SDK Python v0.115.0 was released on June 30, 2026. New features include managed agents event delta streaming for incremental event updates; agent overrides for runtime behavior adjustment; reverse pagination to traverse historical data backward; vault credential injection scoping to control credential availability; and webhook events for agents and deployments to integrate with external systems. These features give developers finer control over agent execution and data flow. Event delta streaming suits low-latency scenarios, while reverse pagination optimizes large event retrieval. Agent overrides allow dynamic parameter tuning without redeployment, aiding rapid iteration and A/B testing. This update significantly boosts flexibility and observability for production-grade agent workflows.