Worked on expanding JSONB support in the juspay/diesel repository, delivering initial integration of the jsonb_set function for PostgreSQL and aligning it with Rust’s type-safe interfaces. Addressed type alias correctness, improved null-path handling to ensure accurate return values, and updated documentation to clarify usage and examples. Deprecated the create_if_missing variant to streamline the feature and reduce backend complexity. The work involved Rust and SQL, with a focus on database functions, type system alignment, and comprehensive testing. These changes enhanced developer experience and reliability for JSONB operations, reflecting a methodical approach to both feature delivery and maintenance.