Worked on the facebook/relay repository, delivering two features focused on GraphQL tooling and schema validation. Developed a method for retrieving directives from executable definitions, enhancing the handling of fragments and operations while supporting downstream tooling through improved parsing robustness. Contributed a platform info maker function for fragment spread, leveraging Rust and GraphQL expertise. Later, optimized the TextSource schema validation process by improving line lookup performance, which reduced validation latency for large schemas and increased reliability in CI pipelines. Addressed a critical validation-time bug in Rust allowlist schema validation, resulting in more stable and predictable validation paths for large-scale projects.