# External IPC Public API Tasks - [x] Add `LanMountainDesktop.Shared.IPC` - [x] Expose built-in `[IpcPublic]` services - [x] Add routed notify constants and public IPC client/host wrappers - [x] Start Host public IPC during app startup - [x] Move Launcher startup progress consumption to the new IPC base - [x] Add plugin public IPC registration/contributor SDK - [x] Register plugin-contributed public services into Host catalog - [x] Add integration tests for strong-typed public service access and plugin registration descriptors - [ ] Expand built-in public service surface beyond the first minimal set - [ ] Add non-.NET bridge guidance and samples