Jellyfin 12 ships TMDB, TVDB, StudioImages and MusicBrainz as core plugins:
no DLL, only a configuration file under the data root, so the keys have to
reach that XML from somewhere that is not git. They live in the fleet's
per-service env-file convention -- /home/dank/Containers/jellyfin/provider-keys
(TMDB_API_KEY=, TVDB_API_KEY=, optional TVDB_PIN=, mode 600) -- and
scripts/jellyfin-providers.sh plan|install|verify reads only that file, prints
no key byte, and refuses a keys file that is not mode 600 or that has no line
for the provider about to be written. install is idempotent: it never touches
a key the UI already saved, backs up every XML it edits into
~/.AGENTTRASH/<date>-jellyfin-providers/ first, and only installs the TVDB
plugin when the pinned official zip carries the plugin guid.
The deployer runs install BEFORE it restarts jellyfin, because the plugin and
its keys are read at start-up and a restart-first deploy boots the old state.
A missing keys file warns instead of failing: a host without the keys still
deploys, degraded rather than broken. No plugin configuration XML is tracked.
