Braintrust is an AI observability platform designed to enhance stability without compromising the core logic of LLM infrastructure. It provides non-blocking logging by default, ensuring that log data is sent in the background without blocking running code. The SDK logger is initialized with asyncFlush set to true, allowing for efficient and asynchronous logging. Braintrust is built for serverless environments, accounting for unique constraints such as ephemeral functions and edge runtimes. It offers tunable parameters to prevent log operations from holding up functions and provides a reliable proxy service that routes requests through AWS CloudFront. The platform also features resilient prompt management, enabling versioning and iteration of LLM workloads while maintaining production reliability. By designing observability by default, Braintrust aims to enhance stability without introducing new points of failure, providing confidence through its design.