Developed a new feature for the opensearch-project/opensearch-api-specification repository, enabling alias renaming during snapshot restores by introducing the rename_alias_pattern and rename_alias_replacement parameters to the Snapshot Restore API. The work involved updating the API specification in yaml, revising the CHANGELOG to document the new behavior, and implementing comprehensive tests to validate alias renaming functionality. This addition allows for safer and more flexible alias migrations, supporting automation and consistency across different environments. The technical approach focused on API specification design and test coverage, leveraging skills in OpenSearch and snapshot restore processes to address real-world migration challenges.