Worked on the element-hq/synapse repository to enhance build observability by developing a Prometheus metric that reports the Rust compiler version used during builds. Implemented a workflow that captures the rustc version at build time, exposes it through a Python-callable function from the Rust extension, and exports the data via a new rustc_version metric endpoint. This integration, built using Python and Rust, enables teams to correlate build behavior with specific compiler versions, improving diagnosis and reducing mean time to resolution in CI/CD and production environments. The work included thorough testing, changelog documentation, and adherence to established project contribution processes.