plain-core

plain-core/
├── Cargo.toml                Builds and tests the four packages together
├── plain-libs/               Business-independent algorithms, formats, files and native primitives
├── plain-rs/                 Domain services, application storage and runtime composition
├── plain-server/             GraphQL, HTTP and native transport adapters
├── plain-cli/                The plainapp command-line executable
├── tests/                    Tests grouped by package; unit paths mirror src/
├── assets/                   Shared Web bundle and canonical file icons
├── schema/                   GraphQL and SQLite definitions
└── scripts/                  Development tools

plain-rs/src/
├── lib.rs                  Public module entry points and compilation gates
├── runtime.rs              Core construction and worker lifecycle
├── features/               Product behavior and domain operations
│   ├── chat/               Chat delivery and message operations
│   ├── files/              File operations and resource references
│   ├── media/              Media library, playback and catalog state
│   ├── prefs/              Application preferences and identity
│   └── services/           Runtime operations by domain
│       └── files/          Browsing, previews, indexing and transfers
└── infrastructure/         Application storage, host contracts and protocol policy
    ├── db/                 Product schema, models and repositories
    ├── host/               Application host commands, scopes and resource streams
    ├── platform/           Application startup, host facts and system coordination
    ├── protocols/          Peer framing and product discovery policy
    ├── transport/          Authenticated peer transport
    └── data_paths/         Application data roots and ownership

plain-libs/src/
├── crypto/                 Encryption, signatures, hashes and key formats
├── media/                  Format parsing, decoding and thumbnails
├── ai_image_search/        Model validation, preprocessing and inference
├── apk/                    Android binary XML and resource parsing
├── tls/                    Certificates and PKCS#12
├── dlna/                   UPnP/DLNA parsing and protocol encoding
├── protocols/mdns/         DNS/mDNS wire codecs and records
├── phone/                  Number parsing and offline metadata lookup
├── filesystem/             File operations and native watching
├── kv.rs                   Generic SQLite key-value storage
├── platform/               Native network, volume and filesystem primitives
└── utils/                  Parsing, encoding, time and file utilities

plain-cli/src/
├── bootstrap.rs            Process initialization and command dispatch
├── cli/                    Command parsing and terminal interaction
├── service.rs              Background service startup, shutdown and failure handling
├── host.rs                 CLI host capabilities and event handling
├── host/linux.rs           Linux host command adapters
├── login_socket.rs         Local login approval socket server and client
└── storage.rs              Startup media sources and mount event wiring

plain-server/
├── src/
│   ├── server.rs             Compose core runtime, schemas and transport state
│   ├── http/
│   │   ├── router.rs         All HTTP route registrations
│   │   ├── fs.rs             /fs: files and previews
│   │   ├── file_response.rs  Shared file streaming, Range and response headers
│   │   ├── zip.rs            /zip/dir and /zip/files
│   │   ├── upload.rs         /upload and /upload_chunk
│   │   ├── managed_proxy.rs  /proxy/{peerId}/*: GraphQL, files, uploads and sockets to known devices
│   │   ├── managed_proxy/    Raw relay, attachment, upload and socket proxy transports
│   │   ├── graphql.rs        Main, peer and guest GraphQL HTTP adapters
│   │   ├── init.rs           /init
│   │   ├── nearby.rs         /nearby
│   │   ├── health.rs         Health handler
│   │   ├── dlna.rs           DLNA description, control, events, media and callbacks
│   │   ├── static_files.rs   Web UI fallback and static files
│   │   ├── web_bundle.rs     Embedded Web asset access
│   │   ├── ble.rs            BLE adapter for the shared transfer routes
│   │   ├── ble/nearby.rs     BLE nearby-device request handling
│   │   ├── auth/            HTTP authorization and CORS middleware
│   │   ├── listeners/       HTTP/TLS sockets and listener lifecycle
│   │   └── websocket/       WebSocket entry points and transport
│   │       ├── auth.rs      /auth upgrade
│   │       ├── graphql.rs   /graphql upgrade and subscriptions
│   │       ├── status.rs    /status and peer status connections
│   │       ├── screen.rs    /screen upgrade
│   │       ├── image_editor.rs  /image_editor upgrade
│   │       ├── runtime.rs   Shared auth, screen and image-editor connections
│   │       └── frames.rs    WebSocket frame encoding
│   ├── graphql/
│   │   ├── schemas/         Main, peer and guest schema construction
│   │   ├── resolvers/       GraphQL queries and mutations by domain
│   │   │   └── mobile/      Mobile GraphQL adapters (contacts and call log)
│   │   ├── subscriptions/   GraphQL subscriptions
│   │   ├── types/           GraphQL types
│   │   └── executor.rs      Shared schema execution
│   ├── host/events.rs        Host event dispatch into the core services
│   └── native/              Native API entry points