Keerthi Sree enhanced observability in the breez-sdk-greenlight repository by developing a feature that formats diagnostic logging outputs as hexadecimal strings. Working primarily in Rust, Keerthi focused on improving the readability of node IDs and channel data within routing responses and custom messages, which streamlines the debugging process for node communications. By introducing hex-formatted outputs for byte arrays, Keerthi enabled developers to more quickly identify and diagnose issues, reducing the time spent on triage. The work demonstrated a solid application of debugging and logging skills within SDK development, addressing a targeted need for clearer diagnostic information in a complex codebase.