Worked on stabilizing the OTEL HTTP exporter in the openai/codex repository, focusing on improving reliability and security for telemetry exports. Addressed runtime panics by replacing asynchronous reqwest interactions with a blocking Tokio client, ensuring more predictable execution in Rust. Enhanced mTLS support by configuring the exporter to trust only custom certificate authorities and enforcing HTTPS-only communication when client identity is present. These changes resulted in a more robust telemetry pipeline, reducing runtime errors and strengthening security controls. The work demonstrated depth in Rust, OpenTelemetry, and secure HTTP communication, delivering a targeted feature that improved production stability without introducing new bugs.