pidgin

• Path: arch/maintained/pidgin
• pkgbase=pidgin, but pkgname=('libpurple' 'finch') (PKGBUILD:7-8) — this package never produces a pkgname literally called pidgin. On AUR, libpurple and finch are both maintained by andreas_baumann under pkgbase pidgin, versions matching this tree exactly.
• The literal AUR pkgname pidgin belongs to a completely unrelated pkgbase, pidgin-gtkui (maintained by webmeister), which independently builds its own pidgin/finch/libpurple split from a different PKGBUILD. No collision: AUR uniqueness is per-pkgname, and this account’s libpurple/finch names aren’t touched by that other package.
• scripts/compare_packages.sh diffs local maintained/ directory names (which mirror pkgbase, not pkgname) straight against the AUR by=maintainer pkgname list — it’s not pkgbase-aware, so a directory named after a pkgbase whose pkgname differs (like this one) will always show up as a false “not on AUR” diff. Not a real problem, just a limitation of that comparison script. See also TOOLING_NOTES.md for the related co-maintainer gap in the same script.