Trim the explanatory comments to short quirk notes, drop the module headers, and fail cleanly: navidrome/gonic now kill their process if they never become ready and the entrypoint always tears down. The prune test waits for the removal to appear in the album list rather than for the scan flag. Correct the AGENTS token-auth note (lms answers 42, Nextcloud 41) and give CI more headroom.
tools/integration-test.nu is now just the entrypoint. The server lifecycle and fixture preparation live in tools/integration/servers.nu, the Subsonic request helpers in subsonic.nu, and shared waiting/port helpers in util.nu. No behaviour change; the assertions still live in the Kotlin tests.
Run the integration harness from its own devshell so the server packages stay out of the everyday shell. Add lms and a Nextcloud Music instance to the harness and extend the suite with auth-fallback, media, error, write round-trip, multi-source and prune tests.
The auth test caught that lms answers OpenSubsonic error 42 (not 41) when it refuses token auth, so the client now falls back on both codes.
SubsonicSourceIntegrationTest runs against locally started navidrome and gonic; tools/integration-test.nu downloads the test music once, starts both servers, seeds data, runs :app:integrationTest, and tears everything down.
austinried