This tool breaks or creates multiallelic VCF records based on user selection (Break or Create, respectively):

• Break = If multiple alleles are specified in a single record, break the record into multiple lines, preserving allele-specific INFO fields.
• Create = If overlapping alleles are represented across multiple records, merge them into a single record.

This tools is based on vcfbreakmulti and vcfcreatemulti utilities from the VCFlib toolkit developed by Erik Garrison (https://github.com/ekg/vcflib).