Arihant Pal developed two core features across the 0PrashantYadav0/stdlib and gofr-dev/gofr repositories, focusing on backend development and data infrastructure. In stdlib, Arihant enhanced the stdevwd statistical function to support accessor arrays, refactoring its logic and updating documentation and benchmarks for improved clarity and maintainability. For gofr, Arihant introduced a version-controlled Elasticsearch migrations system, enabling structured management of index schemas, mappings, and data, which streamlines the creation and updating of indices. Working primarily with Go and JavaScript, Arihant emphasized robust documentation and performance visibility, demonstrating depth in array manipulation, database migrations, and scalable backend architecture within a short timeframe.