Frightcrawler is a small tool I wrote to prepare for MtG tournaments. It fully supports Helvault and AetherHub (just in case) files. To validate your deck - scan the cards with
Helvault and load CSV file into
Usage: frightcrawler -g modern -f PATH/TO/FILE -g GAME_FORMAT Set game format -f CSV_FILE Path to CSV file -i SCRYFALL_ID Get card info -h, --help Print documentation Supported CSV layouts: Helvault, Helvault Pro, AetherHub. Supported formats: brawl, commander, duel, future, gladiator, historic, legacy, modern, oldschool, pauper, penny, pioneer, premodern, standard, vintage.
frightcrawler -g commander -f /Users/chuck/Documents/git/helvault/oct5-b-mono.csv