Retrace

Retrace is a debugging and replay platform built for AI agents, recording every model call, tool invocation, retrieval, and error so engineers can step through execution after the fact. It supports forking execution at specific failure points to test fixes, and side-by-side comparisons showing whether a change improved or regressed agent behavior. Retrace works across multiple runtimes including Python, TypeScript, and OpenTelemetry traces, integrates into CI/CD pipelines as behavioral regression gates, and supports searching and sharing traces as interactive execution records.