• A transient provider failure mid-scan no longer blanks collection or discography gaps from the report.
• Multi-episode files (S01E01-E02) are counted across their whole span, so later parts no longer read as missing.
• A failed report load shows an error instead of spinning forever; no API key reaches the server log.
• Discogs fills gaps in a MusicBrainz-covered artist's discography (the albums one provider lists and the other misses).
• The Diagnose popup verifies an episode by number, and flags an episode you own under a different number (a two-part or off-by-one mismatch) instead of calling it missing.
• Internal: explore kinds self-describe via IExploreSource, GapsController split into per-feature controllers, the music sources share a provider-agnostic base, and duplicated parsers, rotation, and helpers were extracted.