What problem does it solve? Querying large-scale RNA-seq resources like SRA, GTEx, and TCGA for splice junction counts and per-base coverage requires navigating the Snaptron REST API's compilation-specific quirks, metadata field differences, and BigWig URL construction rules, which this Skill documents and operationalizes. ## Core Features & Use Cases - Sample Search: Find RNA-seq samples across compilations (srav2, srav3h, gtexv2, tcgav2, ccle, mouse) using metadata filters like cell_line, tissue, or study_title. - Junction & Coverage Queries: Retrieve splice junction counts per sample and per-base coverage from remote BigWig files via HTTP range requests. - Expression & Visualization: Compute normalized junction expression ratios, approximate TPM from BigWig exon coverage, and generate IGV session XML files. - Use Case: Compare MYT1L splicing in HeLa samples by searching srav2 for rail_ids, querying junction counts, building BigWig URLs, and saving an IGV session for visual inspection. ## Quick Start Ask the assistant to search Snaptron srav2 for HeLa samples and query GAPDH junction coverage for the top hits.