In December 2024, Mihir Shah enhanced the microbiomedata/nmdc-runtime repository by refactoring the materialize_alldocs Dagster operation to incorporate class ancestry into the _type_and_ancestors field, improving both data representation and indexing within the alldocs collection. Using Python and MongoDB, Mihir updated the indexing strategy to enable faster and more accurate lineage queries, which supports more reliable downstream analytics and simplifies data discovery. He also refreshed the project documentation to reflect the new data model and indexing approach, reducing onboarding time and improving maintainability. This work demonstrates a focused application of data engineering and database management skills.