Tonina Zhelyazkova enhanced the dataset import workflow for the sanity-io/sanity repository by developing a CLI-level feature that determines the releases operation based on command-line flags. Using TypeScript and Node.js, she implemented logic to support asset replacement and missing asset scenarios, ensuring that the correct operation is passed through to the @sanity/import module when specific flags are used. This approach improved the reliability and integrity of data imports, reducing the need for manual asset reconciliation during migrations. Her work demonstrated a focused application of CLI development skills and contributed to a more robust asset management process within the project.