Replying to
@ehler@musician.social
@ehler@musician.social Reeder Classic (=Reeder 5) keeps everything in a Realm DB at:
~/Library/Containers/com.reederapp.5.macOS/Data/Library/Application Support/default.realm
It's Realm Core v9 — only the realm npm package pinned to 10.24.0 will open it. Then filter Item where starred == 1, sort by starredDate. Copy the file before reading (live lock).