Braintrust has been actively enhancing its engineering capabilities, focusing on AI observability and evaluation tools for Java applications through the Java SDK, leveraging OpenTelemetry. They have also open-sourced their AI Proxy, which now includes support for Azure OpenAI and provider load balancing. Additionally, Braintrust emphasizes the importance of resilient observability, ensuring no downtime impact, and has significantly improved the speed of its Experiments UI. The company advocates for a canonical agent architecture based on a simple while loop with function calls, which they claim is essential for developing efficient AI agents.