Steam

Steam local library scanner and store aggregator client plugin for Drop (#21).

Build

npm ci
npm run build
npm test
npm run typecheck

Host requirements

The Drop plugin API exposes no arbitrary filesystem access, so nothing in this plugin touches the filesystem or probes the OS. Steam library discovery is a host responsibility: the desktop host's game:scan service must read Steam's artifacts and hand them to the plugin through plugin storage before scan() can return games.

Method	Requires host game:scan?	Input
parseVdf, parseLibraryFoldersVdf, parseAppManifestAcf, joinSteamCommon, collectSteamCandidates, parseLibraryEntries	No	Raw file contents or pre-scanned arrays
detectFromStorage	No (reads ctx.storage only)	Host-populated storage keys
SteamScanner.scan	Indirectly	Whatever the host supplied; [] otherwise

Storage keys the host populates:

• libraryfolders: raw contents of <steam>/steamapps/libraryfolders.vdf
• appManifests: raw contents of each steamapps/appmanifest_<appid>.acf
• library: optional pre-normalized candidate array (legacy fallback)

Executable paths are never guessed: an ACF manifest does not contain a reliable executable, so executablePath stays unset until the host supplies it.