Worked on the grafana/prometheus repository to deliver a new feature enabling Promtool to create TSDB blocks directly from data piped through standard input, streamlining data ingestion workflows. This involved updating the backfillOpenMetrics logic to support piped input, eliminating the need for intermediate files and reducing I/O overhead. Comprehensive end-to-end tests were added to ensure correctness when handling piped data, supporting more reproducible and automated Prometheus pipelines. The work was implemented in Go, focusing on backend development and robust testing practices. Over the course of the month, the contribution centered on enhancing operational efficiency for Prometheus data backfill processes.