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scan-chart reads and writes song folders to this specification. It runs in Node and in browsers, and you use it to:
  • show a song’s metadata without reading its notes;
  • check a chart for problems and get its statistics;
  • calculate the hashes that Clone Hero’s leaderboards use to tell charts apart;
  • edit a chart, save it, and convert it between .chart and .mid.
The README is the guide to using it, with an example for each of these tasks. The release notes list the changes in each version.