MP3 CSV Tagger v1.0.0

MP3 CSV Tagger v1.0.0

Bulk-edit MP3 ID3 tags from CSV files: Match rows to files, Write new
tag values, preview everything before anything is written.

• Layered CSVs with per-column roles — Match, Write, Skip — applied in
  order, so later files can match on values earlier ones wrote.
• Case- and punctuation-insensitive matching; unknown column headings
  become custom TXXX tags.
• Tkinter GUI and a full CLI (run plus project commands).
• Projects are readable JSON (.mp3p.json).
• Every Apply writes a change log (mp3tag_*.log.csv) recording the
  old and new value of every changed tag.
• Fast engine: hash-index matching and in-memory preview — 600 files
  against a 600-row CSV preview in about a second.
• Standalone Linux build attached; Windows build via PyInstaller
  (build_windows.bat in the repo).

Also attached: the original beta release.