Environment: Linux x86_64; bundled T3 server; loopback RPC.
No browser viewport or theme applies to this server capture.
Fixture: synthetic local Git remote; published annotated release tag.
No agents or terminals were started in the worktree.

1. Verify the submodule release is outside all remote branches:
   tag: v0.9.1-ea2
   remote branches containing tag: (none)
   local tag commit: b0c06e9526112051b36f752fb4d7f045aa510b4a
   remote tag commit: b0c06e9526112051b36f752fb4d7f045aa510b4a
   top-level status: clean
   submodule status: clean

2. Enable inactive worktree cleanup: threshold = 1 day.
3. Advance only the server process wall clock by 48 hours.
4. Invoke server.runStorageCleanup (Maintenance > Delete now).

Cleanup counts: {"removed":0,"kept":1,"failed":0}
Outcome: kept
Reason: Submodule has commits not on a remote-tracking ref
Worktree still exists: true