feat: add YAML import — merge nodes/edges from .yaml file into canvas

feat: YAML export

.env.example

@@ -15,3 +15,10 @@ SCANNER_RANGES=["192.168.1.0/24"]
 
 # Status checker interval in seconds
 STATUS_CHECKER_INTERVAL=60
+
+# MCP server — used by the mcp service (port 8001)
+# MCP_API_KEY: authenticates AI clients (Claude Code, etc.) → MCP server
+# MCP_SERVICE_KEY: authenticates MCP server → backend (never exposed externally)
+# Generate keys: python3 -c "import secrets; print(secrets.token_hex(32))"
+MCP_API_KEY=mcp_sk_changeme
+MCP_SERVICE_KEY=svc_changeme

.gitignore

@@ -48,3 +48,4 @@ htmlcov/
 
 # Docker
 .docker/
+Ideas.md

README.md

@@ -84,6 +84,20 @@ The backend runs as a systemd service, the frontend is served via nginx on port
 > bash <(curl -fsSL https://raw.githubusercontent.com/Pouzor/homelable/main/scripts/lxc-install.sh)
 > ```
 
+### Update
+
+Run the update script inside the container (pulls latest code, rebuilds frontend, restarts services — `.env` and database are never touched):
+
+```bash
+sudo bash /opt/homelable/scripts/update.sh
+```
+
+Or directly from GitHub:
+
+```bash
+sudo bash <(curl -fsSL https://raw.githubusercontent.com/Pouzor/homelable/main/scripts/update.sh)
+```
+
 ---
 
 ## Configuration
@@ -162,6 +176,94 @@ Proxmox nodes render as a resizable group container. VM and LXC nodes can be pla
 
 ---
 
+## MCP Server (AI Integration)
+
+Homelable exposes a [Model Context Protocol](https://modelcontextprotocol.io) server so any MCP-compatible AI client (Claude Code, Claude Desktop, Open WebUI…) can read your homelab topology and act on it.
+
+### What the AI can do
+
+| | Action |
+|---|---|
+| **Read** | List all nodes, edges, full canvas, pending devices, scan history |
+| **Write** | Add / update / delete nodes and edges, trigger a network scan, approve or hide discovered devices |
+
+### Setup
+
+**1. Add the keys to your `.env`:**
+
+```env
+# Authenticates AI clients (Claude Code, etc.) → MCP server
+MCP_API_KEY=mcp_sk_changeme
+
+# Authenticates MCP server → backend (internal Docker network only, never exposed)
+MCP_SERVICE_KEY=svc_changeme
+
+# Generate both with:
+# python3 -c "import secrets; print(secrets.token_hex(32))"
+```
+
+No plain-text passwords involved — `AUTH_PASSWORD_HASH` is only used for the web UI login.
+
+**2. Start the MCP service:**
+
+```bash
+docker compose up -d mcp
+# MCP server is now listening on http://<your-homelab-ip>:8001
+```
+
+**3. Configure your AI client:**
+
+**Claude Code** — run this command in your terminal:
+```bash
+claude mcp add --transport sse homelable http://<your-homelab-ip>:8001/mcp \
+  --header "X-API-Key: mcp_sk_yourkey"
+```
+
+Or add it manually to `~/.claude.json`:
+```json
+{
+  "mcpServers": {
+    "homelable": {
+      "type": "sse",
+      "url": "http://<your-homelab-ip>:8001/mcp",
+      "headers": {
+        "X-API-Key": "mcp_sk_yourkey"
+      }
+    }
+  }
+}
+```
+
+**Claude Desktop** — edit `~/Library/Application Support/Claude/claude_desktop_config.json` (macOS) or `%APPDATA%\Claude\claude_desktop_config.json` (Windows):
+```json
+{
+  "mcpServers": {
+    "homelable": {
+      "type": "sse",
+      "url": "http://<your-homelab-ip>:8001/mcp",
+      "headers": {
+        "X-API-Key": "mcp_sk_yourkey"
+      }
+    }
+  }
+}
+```
+
+### Example prompts
+
+- *"What nodes are currently offline?"*
+- *"Add a new LXC container named `pihole` at 192.168.1.5, connected to my switch."*
+- *"Trigger a network scan on 192.168.1.0/24 and show me the pending devices."*
+- *"Show me the full canvas topology."*
+
+### Security
+
+- The MCP server is **not** intended to be exposed to the internet — keep port 8001 firewalled to your LAN.
+- Rotate the key any time by updating `MCP_API_KEY` in `.env` and restarting: `docker compose restart mcp`.
+- The MCP server communicates with the backend over the internal Docker network — the backend API is never directly exposed to MCP clients.
+
+---
+
 ## Development Mode
 
 **Backend (Python 3.13):**

backend/app/api/deps.py

@@ -1,12 +1,30 @@
-from fastapi import Depends, HTTPException, status
+import hmac
+
+from fastapi import Depends, Header, HTTPException, Request, status
 from fastapi.security import HTTPAuthorizationCredentials, HTTPBearer
 
+from app.core.config import settings
 from app.core.security import decode_token
 
-bearer = HTTPBearer()
+bearer = HTTPBearer(auto_error=False)
 
 
-def get_current_user(credentials: HTTPAuthorizationCredentials = Depends(bearer)) -> str:
+def get_current_user(
+    request: Request,
+    credentials: HTTPAuthorizationCredentials | None = Depends(bearer),
+    x_mcp_service_key: str | None = Header(default=None),
+) -> str:
+    # 1. MCP service key (Docker-internal only — backend port is not externally exposed)
+    if x_mcp_service_key is not None:
+        if not settings.mcp_service_key:
+            raise HTTPException(status_code=status.HTTP_401_UNAUTHORIZED, detail="MCP service key not configured")
+        if not hmac.compare_digest(x_mcp_service_key.encode(), settings.mcp_service_key.encode()):
+            raise HTTPException(status_code=status.HTTP_401_UNAUTHORIZED, detail="Invalid MCP service key")
+        return "__mcp_service__"
+
+    # 2. Standard JWT bearer token
+    if credentials is None:
+        raise HTTPException(status_code=status.HTTP_401_UNAUTHORIZED, detail="Not authenticated")
     username = decode_token(credentials.credentials)
     if not username:
         raise HTTPException(status_code=status.HTTP_401_UNAUTHORIZED, detail="Invalid token")

backend/app/api/routes/status.py

@@ -11,11 +11,23 @@ _connections: list[WebSocket] = []
 
 
 @router.websocket("/ws/status")
-async def ws_status(websocket: WebSocket, token: str | None = None) -> None:
+async def ws_status(websocket: WebSocket) -> None:
-    if not token or not decode_token(token):
+    # Accept first so we can send a close frame with a reason code
-        await websocket.close(code=1008)  # Policy Violation
-        return
     await websocket.accept()
+    try:
+        # Expect the first message to be a JSON auth payload: {"token": "<jwt>"}
+        raw = await websocket.receive_text()
+        try:
+            payload = json.loads(raw)
+            token = payload.get("token", "")
+        except (json.JSONDecodeError, AttributeError):
+            token = ""
+        if not token or not decode_token(token):
+            await websocket.close(code=1008)  # Policy Violation
+            return
+    except WebSocketDisconnect:
+        return
+
     _connections.append(websocket)
     try:
         while True:

backend/app/core/config.py

@@ -25,6 +25,11 @@ class Settings(BaseSettings):
     # Status checker
     status_checker_interval: int = 60
 
+    # MCP service key — set MCP_SERVICE_KEY in .env
+    # Used by the MCP server to authenticate against the backend without a user password.
+    # Leave empty to disable MCP service key auth.
+    mcp_service_key: str = ""
+
     def _override_path(self) -> Path:
         return Path(self.sqlite_path).parent / "scan_config.json"
 

backend/app/db/database.py

@@ -42,6 +42,16 @@ async def init_db() -> None:
             await conn.exec_driver_sql("ALTER TABLE edges ADD COLUMN target_handle TEXT")
         with suppress(Exception):
             await conn.exec_driver_sql("ALTER TABLE edges ADD COLUMN animated BOOLEAN NOT NULL DEFAULT 0")
+        with suppress(Exception):
+            await conn.exec_driver_sql("ALTER TABLE nodes ADD COLUMN cpu_count INTEGER")
+        with suppress(Exception):
+            await conn.exec_driver_sql("ALTER TABLE nodes ADD COLUMN cpu_model TEXT")
+        with suppress(Exception):
+            await conn.exec_driver_sql("ALTER TABLE nodes ADD COLUMN ram_gb REAL")
+        with suppress(Exception):
+            await conn.exec_driver_sql("ALTER TABLE nodes ADD COLUMN disk_gb REAL")
+        with suppress(Exception):
+            await conn.exec_driver_sql("ALTER TABLE nodes ADD COLUMN show_hardware BOOLEAN NOT NULL DEFAULT 0")
 
 
 async def get_db() -> AsyncGenerator[AsyncSession, None]:

backend/app/db/models.py

@@ -37,6 +37,11 @@ class Node(Base):
     container_mode: Mapped[bool] = mapped_column(Boolean, default=False)
     custom_colors: Mapped[dict[str, Any] | None] = mapped_column(JSON, nullable=True)
     custom_icon: Mapped[str | None] = mapped_column(String, nullable=True)
+    cpu_count: Mapped[int | None] = mapped_column(Integer, nullable=True)
+    cpu_model: Mapped[str | None] = mapped_column(String, nullable=True)
+    ram_gb: Mapped[float | None] = mapped_column(Float, nullable=True)
+    disk_gb: Mapped[float | None] = mapped_column(Float, nullable=True)
+    show_hardware: Mapped[bool] = mapped_column(Boolean, default=False)
     last_seen: Mapped[datetime | None] = mapped_column(DateTime(timezone=True))
     response_time_ms: Mapped[int | None] = mapped_column(Integer)
     created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), default=_now)

backend/app/schemas/canvas.py

@@ -23,6 +23,11 @@ class NodeSave(BaseModel):
     container_mode: bool = False
     custom_colors: dict[str, Any] | None = None
     custom_icon: str | None = None
+    cpu_count: int | None = None
+    cpu_model: str | None = None
+    ram_gb: float | None = None
+    disk_gb: float | None = None
+    show_hardware: bool = False
     pos_x: float = 0
     pos_y: float = 0
 

backend/app/schemas/nodes.py

@@ -22,6 +22,11 @@ class NodeBase(BaseModel):
     container_mode: bool = False
     custom_colors: dict[str, Any] | None = None
     custom_icon: str | None = None
+    cpu_count: int | None = None
+    cpu_model: str | None = None
+    ram_gb: float | None = None
+    disk_gb: float | None = None
+    show_hardware: bool = False
 
 
 class NodeCreate(NodeBase):
@@ -42,9 +47,15 @@ class NodeUpdate(BaseModel):
     notes: str | None = None
     pos_x: float | None = None
     pos_y: float | None = None
+    parent_id: str | None = None
     container_mode: bool | None = None
     custom_colors: dict[str, Any] | None = None
     custom_icon: str | None = None
+    cpu_count: int | None = None
+    cpu_model: str | None = None
+    ram_gb: float | None = None
+    disk_gb: float | None = None
+    show_hardware: bool | None = None
 
 
 class NodeResponse(NodeBase):

backend/tests/test_auth.py

@@ -1,3 +1,4 @@
+import pytest
 from httpx import AsyncClient
 
 
@@ -28,3 +29,30 @@ async def test_health_is_public(client: AsyncClient):
     res = await client.get("/api/v1/health")
     assert res.status_code == 200
     assert res.json() == {"status": "ok"}
+
+
+# --- MCP service key auth ---
+
+@pytest.fixture
+def with_service_key():
+    from app.core.config import settings
+    settings.mcp_service_key = "test-service-key"
+    yield "test-service-key"
+    settings.mcp_service_key = ""
+
+
+async def test_service_key_grants_access(client: AsyncClient, with_service_key):
+    res = await client.get("/api/v1/nodes", headers={"X-MCP-Service-Key": with_service_key})
+    assert res.status_code == 200
+
+
+async def test_service_key_wrong_value(client: AsyncClient, with_service_key):
+    res = await client.get("/api/v1/nodes", headers={"X-MCP-Service-Key": "wrong-key"})
+    assert res.status_code == 401
+
+
+async def test_service_key_disabled_when_not_configured(client: AsyncClient):
+    from app.core.config import settings
+    settings.mcp_service_key = ""
+    res = await client.get("/api/v1/nodes", headers={"X-MCP-Service-Key": "any-key"})
+    assert res.status_code == 401

backend/tests/test_canvas.py

@@ -138,3 +138,56 @@ async def test_save_canvas_custom_icon_cleared_when_null(client: AsyncClient, he
 async def test_save_canvas_requires_auth(client: AsyncClient):
     res = await client.post("/api/v1/canvas/save", json={"nodes": [], "edges": [], "viewport": {}})
     assert res.status_code == 401
+
+
+async def test_save_canvas_persists_hardware_fields(client: AsyncClient, headers: dict):
+    n1 = node_payload(cpu_count=8, cpu_model="Intel i7-12700K", ram_gb=32.0, disk_gb=500.0)
+    await client.post("/api/v1/canvas/save", json={"nodes": [n1], "edges": [], "viewport": {}}, headers=headers)
+
+    canvas = (await client.get("/api/v1/canvas", headers=headers)).json()
+    node = canvas["nodes"][0]
+    assert node["cpu_count"] == 8
+    assert node["cpu_model"] == "Intel i7-12700K"
+    assert node["ram_gb"] == 32.0
+    assert node["disk_gb"] == 500.0
+
+
+async def test_save_canvas_hardware_fields_nullable(client: AsyncClient, headers: dict):
+    n1 = node_payload(cpu_count=4, ram_gb=16.0)
+    await client.post("/api/v1/canvas/save", json={"nodes": [n1], "edges": [], "viewport": {}}, headers=headers)
+
+    canvas = (await client.get("/api/v1/canvas", headers=headers)).json()
+    node = canvas["nodes"][0]
+    assert node["cpu_count"] == 4
+    assert node["ram_gb"] == 16.0
+    assert node["cpu_model"] is None
+    assert node["disk_gb"] is None
+
+
+async def test_save_canvas_persists_show_hardware(client: AsyncClient, headers: dict):
+    n1 = node_payload(show_hardware=True, cpu_count=4, ram_gb=16.0)
+    await client.post("/api/v1/canvas/save", json={"nodes": [n1], "edges": [], "viewport": {}}, headers=headers)
+
+    canvas = (await client.get("/api/v1/canvas", headers=headers)).json()
+    assert canvas["nodes"][0]["show_hardware"] is True
+
+
+async def test_save_canvas_show_hardware_defaults_false(client: AsyncClient, headers: dict):
+    n1 = node_payload()
+    await client.post("/api/v1/canvas/save", json={"nodes": [n1], "edges": [], "viewport": {}}, headers=headers)
+
+    canvas = (await client.get("/api/v1/canvas", headers=headers)).json()
+    assert canvas["nodes"][0]["show_hardware"] is False
+
+
+async def test_save_canvas_hardware_fields_cleared_on_update(client: AsyncClient, headers: dict):
+    n1 = node_payload(cpu_count=8, ram_gb=32.0)
+    await client.post("/api/v1/canvas/save", json={"nodes": [n1], "edges": [], "viewport": {}}, headers=headers)
+
+    n1_cleared = {**n1, "cpu_count": None, "ram_gb": None}
+    await client.post("/api/v1/canvas/save", json={"nodes": [n1_cleared], "edges": [], "viewport": {}}, headers=headers)
+
+    canvas = (await client.get("/api/v1/canvas", headers=headers)).json()
+    node = canvas["nodes"][0]
+    assert node["cpu_count"] is None
+    assert node["ram_gb"] is None

backend/tests/test_nodes.py

@@ -102,6 +102,16 @@ async def test_update_node_container_mode(client: AsyncClient, headers: dict):
     assert res.json()["container_mode"] is True
 
 
+async def test_update_node_parent_id(client: AsyncClient, headers: dict):
+    parent = await client.post("/api/v1/nodes", json={"type": "proxmox", "label": "PVE", "status": "unknown"}, headers=headers)
+    parent_id = parent.json()["id"]
+    child = await client.post("/api/v1/nodes", json={"type": "lxc", "label": "Child", "status": "unknown"}, headers=headers)
+    child_id = child.json()["id"]
+    res = await client.patch(f"/api/v1/nodes/{child_id}", json={"parent_id": parent_id}, headers=headers)
+    assert res.status_code == 200
+    assert res.json()["parent_id"] == parent_id
+
+
 async def test_create_node_requires_auth(client: AsyncClient):
     res = await client.post("/api/v1/nodes", json={"type": "server", "label": "N", "status": "unknown"})
     assert res.status_code == 401

backend/tests/test_status.py

@@ -22,24 +22,33 @@ def _make_token() -> str:
 # ---------------------------------------------------------------------------
 
 def test_websocket_rejected_without_token():
-    """Connection with no token must be closed before being accepted."""
+    """Connection that sends no token field must be closed with 1008."""
-    with TestClient(app) as client, pytest.raises(WebSocketDisconnect), client.websocket_connect("/api/v1/status/ws/status"):
+    with TestClient(app) as client, pytest.raises(WebSocketDisconnect), client.websocket_connect("/api/v1/status/ws/status") as ws:
-        pass
+        ws.send_text(json.dumps({}))  # missing token field
+        ws.receive_text()  # triggers WebSocketDisconnect from server close
 
 
 def test_websocket_rejected_with_invalid_token():
-    """Connection with a garbage token must be closed."""
+    """Connection that sends a garbage token must be closed."""
-    with TestClient(app) as client, pytest.raises(WebSocketDisconnect), client.websocket_connect("/api/v1/status/ws/status?token=not-a-valid-jwt"):
+    with TestClient(app) as client, pytest.raises(WebSocketDisconnect), client.websocket_connect("/api/v1/status/ws/status") as ws:
-        pass
+        ws.send_text(json.dumps({"token": "not-a-valid-jwt"}))
+        ws.receive_text()
+
+
+def test_websocket_rejected_with_malformed_json():
+    """Connection that sends non-JSON as auth must be closed."""
+    with TestClient(app) as client, pytest.raises(WebSocketDisconnect), client.websocket_connect("/api/v1/status/ws/status") as ws:
+        ws.send_text("not-json")
+        ws.receive_text()
 
 
 def test_websocket_accepted_with_valid_token():
-    """Connection with a valid JWT must be accepted and kept open."""
+    """Connection that sends a valid JWT as first message must be accepted."""
     token = _make_token()
-    with TestClient(app) as client, client.websocket_connect(f"/api/v1/status/ws/status?token={token}") as ws:
+    with TestClient(app) as client, client.websocket_connect("/api/v1/status/ws/status") as ws:
-        # Connection is open — we can send a ping and it should not raise
+        ws.send_text(json.dumps({"token": token}))
+        # Connection is open — subsequent messages should not raise
         ws.send_text("ping")
-            # Server keeps the connection open (no disconnect expected)
 
 
 # ---------------------------------------------------------------------------

docker-compose.yml

@@ -18,6 +18,22 @@ services:
     cap_add:
       - NET_RAW
 
+  mcp:
+    build:
+      context: ./mcp
+      dockerfile: Dockerfile.mcp
+    restart: unless-stopped
+    ports:
+      - "8001:8001"
+    env_file:
+      - .env
+    environment:
+      BACKEND_URL: "http://backend:8000"
+    depends_on:
+      - backend
+    networks:
+      - homelable
+
   frontend:
     build:
       context: .

docker/nginx.conf

@@ -4,6 +4,16 @@ server {
     root /usr/share/nginx/html;
     index index.html;
 
+    # Proxy WebSocket (must be before /api/ to take priority)
+    location /api/v1/status/ws/ {
+        proxy_pass http://backend:8000;
+        proxy_http_version 1.1;
+        proxy_set_header Upgrade $http_upgrade;
+        proxy_set_header Connection "upgrade";
+        proxy_set_header Host $host;
+        proxy_set_header X-Real-IP $remote_addr;
+    }
+
     # Proxy API to backend
     location /api/ {
         proxy_pass http://backend:8000;
@@ -11,7 +21,7 @@ server {
         proxy_set_header X-Real-IP $remote_addr;
     }
 
-    # Proxy WebSocket
+    # Proxy legacy /ws/ path
     location /ws/ {
         proxy_pass http://backend:8000;
         proxy_http_version 1.1;

frontend/package-lock.json

@@ -1,24 +1,26 @@
 {
   "name": "frontend",
-  "version": "0.0.0",
+  "version": "1.0.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "frontend",
-      "version": "0.0.0",
+      "version": "1.0.0",
       "dependencies": {
         "@base-ui/react": "^1.2.0",
         "@dagrejs/dagre": "^2.0.4",
         "@fontsource-variable/geist": "^5.2.8",
         "@fontsource-variable/inter": "^5.2.8",
         "@fontsource/jetbrains-mono": "^5.2.8",
+        "@types/js-yaml": "^4.0.9",
         "@xyflow/react": "^12.10.1",
         "axios": "^1.13.6",
         "class-variance-authority": "^0.7.1",
         "clsx": "^2.1.1",
         "dagre": "^0.8.5",
         "html-to-image": "^1.11.13",
+        "js-yaml": "^4.1.1",
         "next-themes": "^0.4.6",
         "react": "^19.2.0",
         "react-dom": "^19.2.0",
@@ -3008,6 +3010,12 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/@types/js-yaml": {
+      "version": "4.0.9",
+      "resolved": "https://registry.npmjs.org/@types/js-yaml/-/js-yaml-4.0.9.tgz",
+      "integrity": "sha512-k4MGaQl5TGo/iipqb2UDG2UwjXziSWkh0uysQelTlJpX1qGlpUZYm8PnO4DxG1qBomtJUdYJ6qR6xdIah10JLg==",
+      "license": "MIT"
+    },
     "node_modules/@types/json-schema": {
       "version": "7.0.15",
       "resolved": "https://registry.npmjs.org/@types/json-schema/-/json-schema-7.0.15.tgz",
@@ -5474,9 +5482,9 @@
       }
     },
     "node_modules/flatted": {
-      "version": "3.3.4",
+      "version": "3.4.2",
-      "resolved": "https://registry.npmjs.org/flatted/-/flatted-3.3.4.tgz",
+      "resolved": "https://registry.npmjs.org/flatted/-/flatted-3.4.2.tgz",
-      "integrity": "sha512-3+mMldrTAPdta5kjX2G2J7iX4zxtnwpdA8Tr2ZSjkyPSanvbZAcy6flmtnXbEybHrDcU9641lxrMfFuUxVz9vA==",
+      "integrity": "sha512-PjDse7RzhcPkIJwy5t7KPWQSZ9cAbzQXcafsetQoD7sOJRQlGikNbx7yZp2OotDnJyrDcbyRq3Ttb18iYOqkxA==",
       "dev": true,
       "license": "ISC"
     },
@@ -5826,9 +5834,9 @@
       }
     },
     "node_modules/hono": {
-      "version": "4.12.5",
+      "version": "4.12.8",
-      "resolved": "https://registry.npmjs.org/hono/-/hono-4.12.5.tgz",
+      "resolved": "https://registry.npmjs.org/hono/-/hono-4.12.8.tgz",
-      "integrity": "sha512-3qq+FUBtlTHhtYxbxheZgY8NIFnkkC/MR8u5TTsr7YZ3wixryQ3cCwn3iZbg8p8B88iDBBAYSfZDS75t8MN7Vg==",
+      "integrity": "sha512-VJCEvtrezO1IAR+kqEYnxUOoStaQPGrCmX3j4wDTNOcD1uRPFpGlwQUIW8niPuvHXaTUxeOUl5MMDGrl+tmO9A==",
       "license": "MIT",
       "engines": {
         "node": ">=16.9.0"
@@ -8770,9 +8778,9 @@
       }
     },
     "node_modules/undici": {
-      "version": "7.22.0",
+      "version": "7.24.3",
-      "resolved": "https://registry.npmjs.org/undici/-/undici-7.22.0.tgz",
+      "resolved": "https://registry.npmjs.org/undici/-/undici-7.24.3.tgz",
-      "integrity": "sha512-RqslV2Us5BrllB+JeiZnK4peryVTndy9Dnqq62S3yYRRTj0tFQCwEniUy2167skdGOy3vqRzEvl1Dm4sV2ReDg==",
+      "integrity": "sha512-eJdUmK/Wrx2d+mnWWmwwLRyA7OQCkLap60sk3dOK4ViZR7DKwwptwuIvFBg2HaiP9ESaEdhtpSymQPvytpmkCA==",
       "dev": true,
       "license": "MIT",
       "engines": {

frontend/package.json

@@ -19,12 +19,14 @@
     "@fontsource-variable/geist": "^5.2.8",
     "@fontsource-variable/inter": "^5.2.8",
     "@fontsource/jetbrains-mono": "^5.2.8",
+    "@types/js-yaml": "^4.0.9",
     "@xyflow/react": "^12.10.1",
     "axios": "^1.13.6",
     "class-variance-authority": "^0.7.1",
     "clsx": "^2.1.1",
     "dagre": "^0.8.5",
     "html-to-image": "^1.11.13",
+    "js-yaml": "^4.1.1",
     "next-themes": "^0.4.6",
     "react": "^19.2.0",
     "react-dom": "^19.2.0",

frontend/src/App.tsx

@@ -2,8 +2,11 @@ import { useEffect, useCallback, useRef, useState } from 'react'
 import { ReactFlowProvider, type Connection, type Edge } from '@xyflow/react'
 import { type Node } from '@xyflow/react'
 import { applyDagreLayout } from '@/utils/layout'
+import { generateUUID } from '@/utils/uuid'
 import { generateMarkdownTable } from '@/utils/exportMarkdown'
 import { exportToPng } from '@/utils/export'
+import { exportCanvasToYaml, downloadYaml } from '@/utils/exportYaml'
+import { parseYamlToCanvas } from '@/utils/importYaml'
 import { TooltipProvider } from '@/components/ui/tooltip'
 import { Toaster } from '@/components/ui/sonner'
 import { toast } from 'sonner'
@@ -31,7 +34,7 @@ const STANDALONE = import.meta.env.VITE_STANDALONE === 'true'
 const STANDALONE_STORAGE_KEY = 'homelable_canvas'
 
 export default function App() {
-  const { loadCanvas, markSaved, selectedNodeId, addNode, updateNode, deleteNode, onConnect, updateEdge, deleteEdge, setProxmoxContainerMode, setNodeZIndex, editingGroupRectId, setEditingGroupRectId, nodes, edges, snapshotHistory, undo, redo, copySelectedNodes, pasteNodes } = useCanvasStore()
+  const { loadCanvas, markSaved, markUnsaved, selectedNodeId, addNode, updateNode, deleteNode, onConnect, updateEdge, deleteEdge, setProxmoxContainerMode, setNodeZIndex, editingGroupRectId, setEditingGroupRectId, nodes, edges, snapshotHistory, undo, redo, copySelectedNodes, pasteNodes } = useCanvasStore()
   const canvasRef = useRef<HTMLDivElement>(null)
   const { isAuthenticated } = useAuthStore()
   const { activeTheme, setTheme } = useThemeStore()
@@ -102,6 +105,11 @@ export default function App() {
           container_mode: n.data.container_mode ?? false,
           custom_colors: n.data.custom_colors ?? null,
           custom_icon: n.data.custom_icon ?? null,
+          cpu_count: n.data.cpu_count ?? null,
+          cpu_model: n.data.cpu_model ?? null,
+          ram_gb: n.data.ram_gb ?? null,
+          disk_gb: n.data.disk_gb ?? null,
+          show_hardware: n.data.show_hardware ?? false,
           pos_x: n.position.x,
           pos_y: n.position.y,
         }
@@ -238,7 +246,7 @@ export default function App() {
 
   const handleAddNode = useCallback((data: Partial<NodeData>) => {
     snapshotHistory()
-    const id = crypto.randomUUID()
+    const id = generateUUID()
     const isProxmox = data.type === 'proxmox'
     const parentNode = data.parent_id ? nodes.find((n) => n.id === data.parent_id) : null
     // Children position is relative to parent; place near top-left with padding
@@ -260,7 +268,7 @@ export default function App() {
 
   const handleAddGroupRect = useCallback((data: GroupRectFormData) => {
     snapshotHistory()
-    const id = crypto.randomUUID()
+    const id = generateUUID()
     const newNode: Node<NodeData> = {
       id,
       type: 'groupRect',
@@ -272,6 +280,7 @@ export default function App() {
         services: [],
         custom_colors: {
           border: data.border_color,
+          border_style: data.border_style,
           background: data.background_color,
           text_color: data.text_color,
           text_position: data.text_position,
@@ -294,6 +303,7 @@ export default function App() {
       custom_colors: {
         ...existing?.data.custom_colors,
         border: data.border_color,
+        border_style: data.border_style,
         background: data.background_color,
         text_color: data.text_color,
         text_position: data.text_position,
@@ -363,6 +373,25 @@ export default function App() {
     toast.success('Markdown table copied to clipboard')
   }, [nodes])
 
+  const handleExportYaml = useCallback(() => {
+    if (nodes.length === 0) { toast.error('No nodes to export'); return }
+    const content = exportCanvasToYaml(nodes, edges)
+    downloadYaml(content)
+    toast.success('Canvas exported as YAML')
+  }, [nodes, edges])
+
+  const handleImportYaml = useCallback((content: string) => {
+    try {
+      const { nodes: merged, edges: mergedEdges, imported } = parseYamlToCanvas(content, nodes, edges)
+      snapshotHistory()
+      loadCanvas(merged, mergedEdges)
+      markUnsaved()
+      toast.success(`Imported ${imported} node${imported !== 1 ? 's' : ''}`)
+    } catch (err) {
+      toast.error(`Import failed: ${err instanceof Error ? err.message : String(err)}`)
+    }
+  }, [nodes, edges, snapshotHistory, loadCanvas, markUnsaved])
+
   const handleExport = useCallback(async () => {
     const el = canvasRef.current?.querySelector<HTMLElement>('.react-flow')
     if (!el) { toast.error('Canvas not ready'); return }
@@ -441,6 +470,8 @@ export default function App() {
               onRedo={redo}
               onShortcuts={() => setShortcutsOpen(true)}
               onExportMd={handleExportMd}
+              onExportYaml={handleExportYaml}
+              onImportYaml={handleImportYaml}
             />
             <div className="flex flex-1 min-h-0">
               <div ref={canvasRef} className="flex-1 min-w-0 h-full">
@@ -524,6 +555,7 @@ export default function App() {
               text_color: rc.text_color ?? '#e6edf3',
               text_position: rc.text_position ?? 'top-left',
               border_color: rc.border ?? '#00d4ff',
+              border_style: rc.border_style ?? 'solid',
               background_color: rc.background ?? '#00d4ff0d',
               z_order: rc.z_order ?? 1,
             }

frontend/src/components/canvas/nodes/BaseNode.tsx

@@ -1,6 +1,6 @@
 import { createElement } from 'react'
 import { Handle, Position, type NodeProps, type Node } from '@xyflow/react'
-import { type LucideIcon } from 'lucide-react'
+import { Cpu, MemoryStick, HardDrive, type LucideIcon } from 'lucide-react'
 import type { NodeData } from '@/types'
 import { resolveNodeColors } from '@/utils/nodeColors'
 import { resolveNodeIcon } from '@/utils/nodeIcons'
@@ -13,6 +13,11 @@ interface BaseNodeProps extends NodeProps<Node<NodeData>> {
   icon: LucideIcon
 }
 
+function formatStorage(gb: number): string {
+  if (gb >= 1024) return `${(gb / 1024).toFixed(1).replace(/\.0$/, '')} TB`
+  return `${gb} GB`
+}
+
 export function BaseNode({ data, selected, icon: typeIcon }: BaseNodeProps) {
   const activeTheme = useThemeStore((s) => s.activeTheme)
   const hideIp = useCanvasStore((s) => s.hideIp)
@@ -22,10 +27,11 @@ export function BaseNode({ data, selected, icon: typeIcon }: BaseNodeProps) {
   const colors = resolveNodeColors(data, activeTheme)
   const statusColor = theme.colors.statusColors[data.status]
   const isOnline = data.status === 'online'
+  const showHardware = data.show_hardware && (data.cpu_count != null || data.cpu_model || data.ram_gb != null || data.disk_gb != null)
 
   return (
     <div
-      className="relative flex flex-row items-center gap-2.5 px-2.5 py-2 rounded-lg border transition-all duration-200"
+      className="relative flex flex-col rounded-lg border transition-all duration-200"
       style={{
         background: colors.background,
         borderColor: colors.border,
@@ -47,36 +53,77 @@ export function BaseNode({ data, selected, icon: typeIcon }: BaseNodeProps) {
       />
       <Handle type="target" position={Position.Top} id="top-t" style={{ opacity: 0, width: 12, height: 12 }} />
 
-      {/* Icon */}
+      {/* Main row */}
-      <div
+      <div className="flex flex-row items-center gap-2.5 px-2.5 py-2">
-        className="flex items-center justify-center w-7 h-7 rounded-md shrink-0"
+        {/* Icon */}
-        style={{
+        <div
-          color: isOnline ? colors.icon : theme.colors.nodeSubtextColor,
+          className="flex items-center justify-center w-7 h-7 rounded-md shrink-0"
-          background: theme.colors.nodeIconBackground,
+          style={{
-        }}
+            color: isOnline ? colors.icon : theme.colors.nodeSubtextColor,
-      >
+            background: theme.colors.nodeIconBackground,
-        {createElement(resolvedIcon, { size: 15 })}
+          }}
+        >
+          {createElement(resolvedIcon, { size: 15 })}
+        </div>
+
+        {/* Label + IP */}
+        <div className="flex flex-col min-w-0">
+          <div
+            className="text-xs font-medium leading-tight truncate max-w-[110px]"
+            style={{ color: theme.colors.nodeLabelColor }}
+            title={data.label}
+          >
+            {data.label}
+          </div>
+          {data.ip && (
+            <div
+              className="font-mono text-[10px] truncate"
+              style={{ color: theme.colors.nodeSubtextColor }}
+              title={data.ip}
+            >
+              {hideIp ? maskIp(data.ip) : data.ip}
+            </div>
+          )}
+        </div>
       </div>
 
-      {/* Details */}
+      {/* Hardware section */}
-      <div className="flex flex-col min-w-0">
+      {showHardware && (
-        <div
+        <>
-          className="text-xs font-medium leading-tight truncate max-w-[110px]"
+          <div style={{ height: 1, background: `${colors.border}44`, margin: '0 8px' }} />
-          style={{ color: theme.colors.nodeLabelColor }}
+          <div className="flex flex-col gap-1 px-2.5 py-1.5">
-          title={data.label}
+            {/* Line 1: CPU */}
-        >
+            {(data.cpu_model || data.cpu_count != null) && (
-          {data.label}
+              <div className="flex items-center gap-1 font-mono text-[10px]" style={{ color: theme.colors.nodeSubtextColor }}>
-        </div>
+                <Cpu size={9} className="shrink-0" />
-        {data.ip && (
+                {data.cpu_model && (
-          <div
+                  <span className="truncate max-w-[80px]" title={data.cpu_model}>{data.cpu_model}</span>
-            className="font-mono text-[10px] truncate"
+                )}
-            style={{ color: theme.colors.nodeSubtextColor }}
+                {data.cpu_count != null && (
-            title={data.ip}
+                  <span className="shrink-0">{data.cpu_model ? `· ${data.cpu_count}c` : `${data.cpu_count} cores`}</span>
-          >
+                )}
-            {hideIp ? maskIp(data.ip) : data.ip}
+              </div>
+            )}
+            {/* Line 2: RAM + Disk */}
+            {(data.ram_gb != null || data.disk_gb != null) && (
+              <div className="flex items-center gap-2 font-mono text-[10px]" style={{ color: theme.colors.nodeSubtextColor }}>
+                {data.ram_gb != null && (
+                  <span className="flex items-center gap-0.5">
+                    <MemoryStick size={9} className="shrink-0" />
+                    {formatStorage(data.ram_gb)}
+                  </span>
+                )}
+                {data.disk_gb != null && (
+                  <span className="flex items-center gap-0.5">
+                    <HardDrive size={9} className="shrink-0" />
+                    {formatStorage(data.disk_gb)}
+                  </span>
+                )}
+              </div>
+            )}
           </div>
-        )}
+        </>
-      </div>
+      )}
 
       {/* Status dot */}
       <div

frontend/src/components/canvas/nodes/GroupRectNode.tsx

@@ -31,6 +31,7 @@ export function GroupRectNode({ id, data, selected }: NodeProps<Node<NodeData>>)
 
   const rc = data.custom_colors ?? {}
   const borderColor = rc.border ?? '#00d4ff'
+  const borderStyle = rc.border_style ?? 'solid'
   const backgroundColor = rc.background ?? 'rgba(0,212,255,0.05)'
   const textColor = rc.text_color ?? '#e6edf3'
   const fontFamily = FONT_FAMILIES[rc.font ?? 'inter'] ?? FONT_FAMILIES.inter
@@ -61,7 +62,7 @@ export function GroupRectNode({ id, data, selected }: NodeProps<Node<NodeData>>)
           justifyContent: posStyle.justifyContent,
           padding: 12,
           background: backgroundColor,
-          border: `${selected ? 2 : 1}px solid ${selected ? '#00d4ff' : borderColor}`,
+          border: `${selected ? 2 : 1}px ${selected ? 'solid' : borderStyle} ${selected ? '#00d4ff' : borderColor}`,
           borderRadius: 10,
           fontFamily,
           color: textColor,

frontend/src/components/canvas/nodes/index.tsx

@@ -1,7 +1,7 @@
 import { type NodeProps, type Node } from '@xyflow/react'
 import {
   Globe, Router, Network, Server, Layers, Box, Container,
-  HardDrive, Cpu, Wifi, Circle, Cctv, Printer, Monitor, PlugZap,
+  HardDrive, Cpu, Wifi, Circle, Cctv, Printer, Monitor, PlugZap, Anchor,
 } from 'lucide-react'
 import { BaseNode } from './BaseNode'
 import type { NodeData } from '@/types'
@@ -22,4 +22,5 @@ export const CameraNode   = (props: N) => <BaseNode {...props} icon={Cctv} />
 export const PrinterNode  = (props: N) => <BaseNode {...props} icon={Printer} />
 export const ComputerNode = (props: N) => <BaseNode {...props} icon={Monitor} />
 export const CplNode      = (props: N) => <BaseNode {...props} icon={PlugZap} />
+export const DockerNode   = (props: N) => <BaseNode {...props} icon={Anchor} />
 export const GenericNode  = (props: N) => <BaseNode {...props} icon={Circle} />

frontend/src/components/canvas/nodes/nodeTypes.ts

@@ -1,4 +1,4 @@
-import { IspNode, RouterNode, SwitchNode, ServerNode, VmNode, LxcNode, NasNode, IotNode, ApNode, CameraNode, PrinterNode, ComputerNode, CplNode, GenericNode } from './index'
+import { IspNode, RouterNode, SwitchNode, ServerNode, VmNode, LxcNode, NasNode, IotNode, ApNode, CameraNode, PrinterNode, ComputerNode, CplNode, DockerNode, GenericNode } from './index'
 import { ProxmoxGroupNode } from './ProxmoxGroupNode'
 import { GroupRectNode } from './GroupRectNode'
 
@@ -17,6 +17,7 @@ export const nodeTypes = {
   printer: PrinterNode,
   computer: ComputerNode,
   cpl: CplNode,
+  docker: DockerNode,
   generic: GenericNode,
   groupRect: GroupRectNode,
 }

frontend/src/components/modals/GroupRectModal.tsx

@@ -6,22 +6,34 @@ import { Label } from '@/components/ui/label'
 import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from '@/components/ui/select'
 import type { TextPosition } from '@/types'
 
+export type BorderStyle = 'solid' | 'dashed' | 'dotted' | 'double' | 'none'
+
 export interface GroupRectFormData {
   label: string
   font: string
   text_color: string
   text_position: TextPosition
   border_color: string
+  border_style: BorderStyle
   background_color: string
   z_order: number
 }
 
+const BORDER_STYLES: { value: BorderStyle; label: string; preview: string }[] = [
+  { value: 'solid',  label: 'Solid',  preview: '───' },
+  { value: 'dashed', label: 'Dashed', preview: '╌╌╌' },
+  { value: 'dotted', label: 'Dotted', preview: '···' },
+  { value: 'double', label: 'Double', preview: '═══' },
+  { value: 'none',   label: 'None',   preview: '   ' },
+]
+
 const DEFAULT_FORM: GroupRectFormData = {
   label: '',
   font: 'inter',
   text_color: '#e6edf3',
   text_position: 'top-left',
   border_color: '#00d4ff',
+  border_style: 'solid',
   background_color: '#00d4ff0d',
   z_order: 1,
 }
@@ -157,6 +169,33 @@ export function GroupRectModal({ open, onClose, onSubmit, onDelete, initial, tit
             </div>
           </div>
 
+          {/* Border style */}
+          <div className="flex flex-col gap-1.5">
+            <Label className="text-xs text-muted-foreground">Border Style</Label>
+            <div className="grid grid-cols-5 gap-1">
+              {BORDER_STYLES.map(({ value, label, preview }) => {
+                const isSelected = form.border_style === value
+                return (
+                  <button
+                    key={value}
+                    type="button"
+                    title={label}
+                    onClick={() => set('border_style', value)}
+                    className="flex flex-col items-center justify-center h-10 rounded text-xs gap-0.5 transition-colors"
+                    style={{
+                      background: isSelected ? '#00d4ff22' : '#21262d',
+                      border: `1px solid ${isSelected ? '#00d4ff88' : '#30363d'}`,
+                      color: isSelected ? '#00d4ff' : '#8b949e',
+                    }}
+                  >
+                    <span className="font-mono text-[11px] leading-none">{preview}</span>
+                    <span className="text-[9px]">{label}</span>
+                  </button>
+                )
+              })}
+            </div>
+          </div>
+
           {/* Z-order */}
           <div className="flex flex-col gap-1.5">
             <Label className="text-xs text-muted-foreground">Z-Order (1 = furthest back)</Label>

frontend/src/components/modals/NodeModal.tsx

@@ -4,12 +4,17 @@ import { Dialog, DialogContent, DialogHeader, DialogTitle } from '@/components/u
 import { Button } from '@/components/ui/button'
 import { Input } from '@/components/ui/input'
 import { Label } from '@/components/ui/label'
-import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from '@/components/ui/select'
+import { Select, SelectContent, SelectGroup, SelectItem, SelectLabel, SelectSeparator, SelectTrigger, SelectValue } from '@/components/ui/select'
 import { NODE_TYPE_LABELS, type NodeData, type NodeType, type CheckMethod } from '@/types'
 import { resolveNodeColors } from '@/utils/nodeColors'
 import { ICON_REGISTRY, ICON_CATEGORIES } from '@/utils/nodeIcons'
 
-const NODE_TYPES = Object.entries(NODE_TYPE_LABELS) as [NodeType, string][]
+const NODE_TYPE_GROUPS: { label: string; types: NodeType[] }[] = [
+  { label: 'Hardware',       types: ['isp', 'router', 'switch', 'server', 'nas', 'ap', 'printer'] },
+  { label: 'Virtualization', types: ['proxmox', 'vm', 'lxc', 'docker'] },
+  { label: 'IoT',            types: ['iot', 'camera', 'cpl'] },
+  { label: 'Generic',        types: ['computer', 'generic', 'groupRect'] },
+]
 
 const CHECK_METHODS: CheckMethod[] = ['none', 'ping', 'http', 'https', 'tcp', 'ssh', 'prometheus', 'health']
 
@@ -43,13 +48,20 @@ export function NodeModal({ open, onClose, onSubmit, initial, title = 'Add Node'
   const [form, setForm] = useState<Partial<NodeData>>({ ...DEFAULT_DATA, ...initial })
   const [iconSearch, setIconSearch] = useState('')
   const [iconPickerOpen, setIconPickerOpen] = useState(false)
+  const [labelError, setLabelError] = useState(false)
+  const hasHardwareData = !!(initial?.cpu_count || initial?.cpu_model || initial?.ram_gb || initial?.disk_gb)
+  const [hardwareOpen, setHardwareOpen] = useState(hasHardwareData)
 
   const set = (key: keyof NodeData, value: unknown) =>
     setForm((f) => ({ ...f, [key]: value }))
 
   const handleSubmit = (e: React.FormEvent) => {
     e.preventDefault()
-    if (!form.label?.trim()) return
+    if (!form.label?.trim()) {
+      setLabelError(true)
+      return
+    }
+    setLabelError(false)
     onSubmit(form)
     onClose()
   }
@@ -71,10 +83,20 @@ export function NodeModal({ open, onClose, onSubmit, initial, title = 'Add Node'
                   <SelectValue />
                 </SelectTrigger>
                 <SelectContent className="bg-[#21262d] border-[#30363d]">
-                  {NODE_TYPES.map(([value, label]) => (
+                  {NODE_TYPE_GROUPS.map((group, i) => (
-                    <SelectItem key={value} value={value} className="text-sm">
+                    <>
-                      {label}
+                      {i > 0 && <SelectSeparator key={`sep-${group.label}`} className="bg-[#30363d]" />}
-                    </SelectItem>
+                      <SelectGroup key={group.label}>
+                        <SelectLabel className="text-[10px] font-semibold uppercase tracking-wider text-muted-foreground/50 px-2 py-1">
+                          {group.label}
+                        </SelectLabel>
+                        {group.types.map((type) => (
+                          <SelectItem key={type} value={type} className="text-sm pl-4">
+                            {NODE_TYPE_LABELS[type]}
+                          </SelectItem>
+                        ))}
+                      </SelectGroup>
+                    </>
                   ))}
                 </SelectContent>
               </Select>
@@ -167,11 +189,11 @@ export function NodeModal({ open, onClose, onSubmit, initial, title = 'Add Node'
               <Label className="text-xs text-muted-foreground">Label *</Label>
               <Input
                 value={form.label ?? ''}
-                onChange={(e) => set('label', e.target.value)}
+                onChange={(e) => { set('label', e.target.value); if (labelError) setLabelError(false) }}
                 placeholder="My Server"
-                className="bg-[#21262d] border-[#30363d] text-sm h-8"
+                className={`bg-[#21262d] text-sm h-8 ${labelError ? 'border-[#f85149] focus-visible:ring-[#f85149]' : 'border-[#30363d]'}`}
-                required
               />
+              {labelError && <p className="text-[11px] text-[#f85149]">Label is required</p>}
             </div>
 
             {/* Hostname */}
@@ -310,6 +332,88 @@ export function NodeModal({ open, onClose, onSubmit, initial, title = 'Add Node'
               )}
             </div>
 
+            {/* Hardware specs (hidden for groupRect) */}
+            {form.type !== 'groupRect' && (
+              <div className="flex flex-col gap-2 col-span-2">
+                <div className="flex items-center justify-between w-full">
+                  <button
+                    type="button"
+                    onClick={() => setHardwareOpen((o) => !o)}
+                    className="flex items-center gap-1 text-xs text-muted-foreground hover:text-foreground transition-colors"
+                  >
+                    <span className="font-medium">Hardware</span>
+                    <ChevronDown size={12} style={{ transform: hardwareOpen ? 'rotate(180deg)' : undefined, transition: 'transform 0.15s' }} />
+                  </button>
+                  {hardwareOpen && (
+                    <div className="flex items-center gap-1.5">
+                      <span className="text-[10px] text-muted-foreground/60">Show on node</span>
+                      <button
+                        type="button"
+                        role="switch"
+                        aria-checked={!!form.show_hardware}
+                        onClick={() => set('show_hardware', !form.show_hardware)}
+                        className="relative inline-flex h-4 w-7 shrink-0 cursor-pointer items-center rounded-full border-2 border-transparent transition-colors focus:outline-none"
+                        style={{ background: form.show_hardware ? '#00d4ff' : '#30363d' }}
+                      >
+                        <span
+                          className="pointer-events-none inline-block h-3 w-3 rounded-full bg-white shadow-sm transition-transform"
+                          style={{ transform: form.show_hardware ? 'translateX(12px)' : 'translateX(0)' }}
+                        />
+                      </button>
+                    </div>
+                  )}
+                </div>
+                {hardwareOpen && (
+                  <div className="grid grid-cols-2 gap-3">
+                    <div className="flex flex-col gap-1.5 col-span-2">
+                      <Label className="text-xs text-muted-foreground">CPU Model</Label>
+                      <Input
+                        value={form.cpu_model ?? ''}
+                        onChange={(e) => set('cpu_model', e.target.value || undefined)}
+                        placeholder="e.g. Intel Xeon E5-2680"
+                        className="bg-[#21262d] border-[#30363d] text-sm h-8"
+                      />
+                    </div>
+                    <div className="flex flex-col gap-1.5">
+                      <Label className="text-xs text-muted-foreground">CPU Cores</Label>
+                      <Input
+                        type="number"
+                        min={1}
+                        value={form.cpu_count ?? ''}
+                        onChange={(e) => set('cpu_count', e.target.value ? parseInt(e.target.value, 10) : undefined)}
+                        placeholder="e.g. 8"
+                        className="bg-[#21262d] border-[#30363d] font-mono text-sm h-8"
+                      />
+                    </div>
+                    <div className="flex flex-col gap-1.5">
+                      <Label className="text-xs text-muted-foreground">RAM (GB)</Label>
+                      <Input
+                        type="number"
+                        min={0}
+                        step={0.5}
+                        value={form.ram_gb ?? ''}
+                        onChange={(e) => set('ram_gb', e.target.value ? parseFloat(e.target.value) : undefined)}
+                        placeholder="e.g. 32"
+                        className="bg-[#21262d] border-[#30363d] font-mono text-sm h-8"
+                      />
+                    </div>
+                    <div className="flex flex-col gap-1.5 col-span-2">
+                      <Label className="text-xs text-muted-foreground">Disk (GB)</Label>
+                      <Input
+                        type="number"
+                        min={0}
+                        step={1}
+                        value={form.disk_gb ?? ''}
+                        onChange={(e) => set('disk_gb', e.target.value ? parseFloat(e.target.value) : undefined)}
+                        placeholder="e.g. 500"
+                        className="bg-[#21262d] border-[#30363d] font-mono text-sm h-8"
+                      />
+                    </div>
+                  </div>
+                )}
+              </div>
+            )}
+
             {/* Notes */}
             <div className="flex flex-col gap-1.5 col-span-2">
               <Label className="text-xs text-muted-foreground">Notes</Label>

frontend/src/components/modals/__tests__/GroupRectModal.test.tsx

@@ -80,4 +80,56 @@ describe('GroupRectModal', () => {
     const submitted = onSubmit.mock.calls[0][0] as GroupRectFormData
     expect(submitted.text_position).toBe('bottom-right')
   })
+
+  it('renders Border Style section', () => {
+    render(<GroupRectModal open onClose={vi.fn()} onSubmit={vi.fn()} />)
+    expect(screen.getByText('Border Style')).toBeDefined()
+    expect(screen.getByTitle('Solid')).toBeDefined()
+    expect(screen.getByTitle('Dashed')).toBeDefined()
+    expect(screen.getByTitle('Dotted')).toBeDefined()
+    expect(screen.getByTitle('Double')).toBeDefined()
+    expect(screen.getByTitle('None')).toBeDefined()
+  })
+
+  it('defaults border_style to solid', () => {
+    const onSubmit = vi.fn()
+    render(<GroupRectModal open onClose={vi.fn()} onSubmit={onSubmit} />)
+    fireEvent.click(screen.getByText('Add'))
+    const submitted = onSubmit.mock.calls[0][0] as GroupRectFormData
+    expect(submitted.border_style).toBe('solid')
+  })
+
+  it('selects border style on click', () => {
+    const onSubmit = vi.fn()
+    render(<GroupRectModal open onClose={vi.fn()} onSubmit={onSubmit} />)
+    fireEvent.click(screen.getByTitle('Dashed'))
+    fireEvent.click(screen.getByText('Add'))
+    const submitted = onSubmit.mock.calls[0][0] as GroupRectFormData
+    expect(submitted.border_style).toBe('dashed')
+  })
+
+  it('pre-fills border_style from initial prop', () => {
+    const onSubmit = vi.fn()
+    render(
+      <GroupRectModal
+        open
+        onClose={vi.fn()}
+        onSubmit={onSubmit}
+        initial={{ border_style: 'dotted' }}
+      />
+    )
+    fireEvent.click(screen.getByText('Add'))
+    const submitted = onSubmit.mock.calls[0][0] as GroupRectFormData
+    expect(submitted.border_style).toBe('dotted')
+  })
+
+  it('toggles border style — clicking selected style deselects back to solid', () => {
+    const onSubmit = vi.fn()
+    render(<GroupRectModal open onClose={vi.fn()} onSubmit={onSubmit} />)
+    fireEvent.click(screen.getByTitle('Dotted'))
+    fireEvent.click(screen.getByTitle('Solid'))
+    fireEvent.click(screen.getByText('Add'))
+    const submitted = onSubmit.mock.calls[0][0] as GroupRectFormData
+    expect(submitted.border_style).toBe('solid')
+  })
 })

frontend/src/components/modals/__tests__/NodeModal.test.tsx

@@ -0,0 +1,170 @@
+import { describe, it, expect, vi } from 'vitest'
+import { render, screen, fireEvent } from '@testing-library/react'
+import { NodeModal } from '../NodeModal'
+
+describe('NodeModal', () => {
+  it('renders nothing when closed', () => {
+    const { container } = render(
+      <NodeModal open={false} onClose={vi.fn()} onSubmit={vi.fn()} />
+    )
+    expect(container.querySelector('[role="dialog"]')).toBeNull()
+  })
+
+  it('renders form fields when open', () => {
+    render(<NodeModal open onClose={vi.fn()} onSubmit={vi.fn()} />)
+    expect(screen.getByPlaceholderText('My Server')).toBeDefined()
+    expect(screen.getByText('Add Node')).toBeDefined()
+  })
+
+  it('does not call onSubmit when label is empty and shows error', () => {
+    const onSubmit = vi.fn()
+    render(<NodeModal open onClose={vi.fn()} onSubmit={onSubmit} />)
+    fireEvent.click(screen.getByText('Add'))
+    expect(onSubmit).not.toHaveBeenCalled()
+    expect(screen.getByText('Label is required')).toBeDefined()
+  })
+
+  it('calls onSubmit with form data when label is filled', () => {
+    const onSubmit = vi.fn()
+    const onClose = vi.fn()
+    render(<NodeModal open onClose={onClose} onSubmit={onSubmit} />)
+    fireEvent.change(screen.getByPlaceholderText('My Server'), { target: { value: 'My NAS' } })
+    fireEvent.click(screen.getByText('Add'))
+    expect(onSubmit).toHaveBeenCalledOnce()
+    expect(onSubmit.mock.calls[0][0].label).toBe('My NAS')
+    expect(onClose).toHaveBeenCalledOnce()
+  })
+
+  it('clears label error when user starts typing', () => {
+    render(<NodeModal open onClose={vi.fn()} onSubmit={vi.fn()} />)
+    fireEvent.click(screen.getByText('Add'))
+    expect(screen.getByText('Label is required')).toBeDefined()
+    fireEvent.change(screen.getByPlaceholderText('My Server'), { target: { value: 'x' } })
+    expect(screen.queryByText('Label is required')).toBeNull()
+  })
+
+  it('pre-fills form from initial prop', () => {
+    render(
+      <NodeModal open onClose={vi.fn()} onSubmit={vi.fn()} initial={{ label: 'Pre-filled', ip: '10.0.0.1' }} />
+    )
+    const input = screen.getByPlaceholderText('My Server') as HTMLInputElement
+    expect(input.value).toBe('Pre-filled')
+  })
+
+  it('shows Save button text when title is Edit Node', () => {
+    render(<NodeModal open onClose={vi.fn()} onSubmit={vi.fn()} title="Edit Node" />)
+    expect(screen.getByText('Save')).toBeDefined()
+  })
+
+  it('calls onClose when Cancel is clicked', () => {
+    const onClose = vi.fn()
+    render(<NodeModal open onClose={onClose} onSubmit={vi.fn()} />)
+    fireEvent.click(screen.getByText('Cancel'))
+    expect(onClose).toHaveBeenCalledOnce()
+  })
+
+  describe('Hardware section', () => {
+    it('renders Hardware toggle button', () => {
+      render(<NodeModal open onClose={vi.fn()} onSubmit={vi.fn()} />)
+      expect(screen.getByText('Hardware')).toBeDefined()
+    })
+
+    it('hardware fields are hidden by default', () => {
+      render(<NodeModal open onClose={vi.fn()} onSubmit={vi.fn()} />)
+      expect(screen.queryByPlaceholderText('e.g. Intel Xeon E5-2680')).toBeNull()
+    })
+
+    it('expands hardware fields on toggle click', () => {
+      render(<NodeModal open onClose={vi.fn()} onSubmit={vi.fn()} />)
+      fireEvent.click(screen.getByText('Hardware'))
+      expect(screen.getByPlaceholderText('e.g. Intel Xeon E5-2680')).toBeDefined()
+      expect(screen.getByPlaceholderText('e.g. 8')).toBeDefined()
+      expect(screen.getByPlaceholderText('e.g. 32')).toBeDefined()
+      expect(screen.getByPlaceholderText('e.g. 500')).toBeDefined()
+    })
+
+    it('submits hardware fields when filled', () => {
+      const onSubmit = vi.fn()
+      render(<NodeModal open onClose={vi.fn()} onSubmit={onSubmit} />)
+      fireEvent.change(screen.getByPlaceholderText('My Server'), { target: { value: 'Homelab' } })
+      fireEvent.click(screen.getByText('Hardware'))
+      fireEvent.change(screen.getByPlaceholderText('e.g. Intel Xeon E5-2680'), { target: { value: 'Intel i7-12700K' } })
+      fireEvent.change(screen.getByPlaceholderText('e.g. 8'), { target: { value: '12' } })
+      fireEvent.change(screen.getByPlaceholderText('e.g. 32'), { target: { value: '64' } })
+      fireEvent.change(screen.getByPlaceholderText('e.g. 500'), { target: { value: '2000' } })
+      fireEvent.click(screen.getByText('Add'))
+      const submitted = onSubmit.mock.calls[0][0]
+      expect(submitted.cpu_model).toBe('Intel i7-12700K')
+      expect(submitted.cpu_count).toBe(12)
+      expect(submitted.ram_gb).toBe(64)
+      expect(submitted.disk_gb).toBe(2000)
+    })
+
+    it('auto-expands when initial has hardware data', () => {
+      render(
+        <NodeModal
+          open
+          onClose={vi.fn()}
+          onSubmit={vi.fn()}
+          initial={{ label: 'Server', cpu_count: 8, ram_gb: 32 }}
+        />
+      )
+      expect(screen.getByPlaceholderText('e.g. Intel Xeon E5-2680')).toBeDefined()
+    })
+
+    it('hides hardware section for groupRect type', () => {
+      render(
+        <NodeModal
+          open
+          onClose={vi.fn()}
+          onSubmit={vi.fn()}
+          initial={{ type: 'groupRect' }}
+        />
+      )
+      expect(screen.queryByText('Hardware')).toBeNull()
+    })
+
+    it('show on node toggle is hidden when section is collapsed', () => {
+      render(<NodeModal open onClose={vi.fn()} onSubmit={vi.fn()} />)
+      expect(screen.queryByText('Show on node')).toBeNull()
+    })
+
+    it('show on node toggle appears when section is expanded', () => {
+      render(<NodeModal open onClose={vi.fn()} onSubmit={vi.fn()} />)
+      fireEvent.click(screen.getByText('Hardware'))
+      expect(screen.getByText('Show on node')).toBeDefined()
+    })
+
+    it('show_hardware defaults to false', () => {
+      const onSubmit = vi.fn()
+      render(<NodeModal open onClose={vi.fn()} onSubmit={onSubmit} />)
+      fireEvent.change(screen.getByPlaceholderText('My Server'), { target: { value: 'Node' } })
+      fireEvent.click(screen.getByText('Add'))
+      expect(onSubmit.mock.calls[0][0].show_hardware).toBeFalsy()
+    })
+
+    it('toggling show on node sets show_hardware to true', () => {
+      const onSubmit = vi.fn()
+      render(<NodeModal open onClose={vi.fn()} onSubmit={onSubmit} />)
+      fireEvent.change(screen.getByPlaceholderText('My Server'), { target: { value: 'Node' } })
+      fireEvent.click(screen.getByText('Hardware'))
+      fireEvent.click(screen.getByRole('switch'))
+      fireEvent.click(screen.getByText('Add'))
+      expect(onSubmit.mock.calls[0][0].show_hardware).toBe(true)
+    })
+
+    it('pre-fills show_hardware from initial prop', () => {
+      const onSubmit = vi.fn()
+      render(
+        <NodeModal
+          open
+          onClose={vi.fn()}
+          onSubmit={onSubmit}
+          initial={{ label: 'Node', show_hardware: true, cpu_count: 8 }}
+        />
+      )
+      fireEvent.click(screen.getByText('Add'))
+      expect(onSubmit.mock.calls[0][0].show_hardware).toBe(true)
+    })
+  })
+})

frontend/src/components/panels/DetailPanel.tsx

@@ -100,6 +100,17 @@ export function DetailPanel({ onEdit }: DetailPanelProps) {
         )}
       </div>
 
+      {/* Hardware */}
+      {(data.cpu_count != null || data.cpu_model || data.ram_gb != null || data.disk_gb != null) && (
+        <div className="flex flex-col gap-3 px-4 py-3 text-sm border-t border-border">
+          <span className="text-[10px] font-semibold uppercase tracking-wider text-muted-foreground/50">Hardware</span>
+          {data.cpu_model && <DetailRow label="CPU" value={data.cpu_model} />}
+          {data.cpu_count != null && <DetailRow label="Cores" value={String(data.cpu_count)} mono />}
+          {data.ram_gb != null && <DetailRow label="RAM" value={formatStorage(data.ram_gb)} mono />}
+          {data.disk_gb != null && <DetailRow label="Disk" value={formatStorage(data.disk_gb)} mono />}
+        </div>
+      )}
+
       {/* Services */}
       <div className="px-4 py-3 border-t border-border">
         <div className="flex items-center justify-between mb-2">
@@ -202,6 +213,11 @@ export function DetailPanel({ onEdit }: DetailPanelProps) {
   )
 }
 
+function formatStorage(gb: number): string {
+  if (gb >= 1024) return `${(gb / 1024).toFixed(1).replace(/\.0$/, '')} TB`
+  return `${gb} GB`
+}
+
 function DetailRow({ label, value, mono }: { label: string; value: string; mono?: boolean }) {
   return (
     <div className="flex justify-between gap-2 items-baseline">

frontend/src/components/panels/Toolbar.tsx

@@ -1,4 +1,5 @@
-import { Save, LayoutDashboard, Download, Palette, Undo2, Redo2, HelpCircle, Table2 } from 'lucide-react'
+import { useRef } from 'react'
+import { Save, LayoutDashboard, Download, Palette, Undo2, Redo2, HelpCircle, Table2, FileDown, Upload } from 'lucide-react'
 import { Button } from '@/components/ui/button'
 import { Logo } from '@/components/ui/Logo'
 import { useCanvasStore } from '@/stores/canvasStore'
@@ -12,10 +13,25 @@ interface ToolbarProps {
   onRedo: () => void
   onShortcuts: () => void
   onExportMd: () => void
+  onExportYaml: () => void
+  onImportYaml: (content: string) => void
 }
 
-export function Toolbar({ onSave, onAutoLayout, onExport, onChangeStyle, onUndo, onRedo, onShortcuts, onExportMd }: ToolbarProps) {
+export function Toolbar({ onSave, onAutoLayout, onExport, onChangeStyle, onUndo, onRedo, onShortcuts, onExportMd, onExportYaml, onImportYaml }: ToolbarProps) {
   const { hasUnsavedChanges, past, future } = useCanvasStore()
+  const fileInputRef = useRef<HTMLInputElement>(null)
+
+  function handleFileChange(e: React.ChangeEvent<HTMLInputElement>) {
+    const file = e.target.files?.[0]
+    if (!file) return
+    const reader = new FileReader()
+    reader.onload = (ev) => {
+      const content = ev.target?.result
+      if (typeof content === 'string') onImportYaml(content)
+    }
+    reader.readAsText(file)
+    e.target.value = ''
+  }
 
   return (
     <header className="flex items-center gap-2 px-4 py-2 border-b border-border bg-[#161b22] shrink-0">
@@ -46,12 +62,25 @@ export function Toolbar({ onSave, onAutoLayout, onExport, onChangeStyle, onUndo,
       <Button size="sm" variant="ghost" className="gap-1.5 text-muted-foreground hover:text-foreground" onClick={onChangeStyle}>
         <Palette size={14} /> Style
       </Button>
+      <Button size="sm" variant="ghost" className="gap-1.5 text-muted-foreground hover:text-foreground" onClick={() => fileInputRef.current?.click()} title="Import from YAML">
+        <Upload size={14} /> Import
+      </Button>
+      <input
+        ref={fileInputRef}
+        type="file"
+        accept=".yaml,.yml"
+        className="hidden"
+        onChange={handleFileChange}
+      />
       <Button size="sm" variant="ghost" className="gap-1.5 text-muted-foreground hover:text-foreground" onClick={onExport} title="Export as PNG">
         <Download size={14} /> Export
       </Button>
       <Button size="sm" variant="ghost" className="gap-1.5 text-muted-foreground hover:text-foreground" onClick={onExportMd} title="Copy inventory as Markdown table">
         <Table2 size={14} /> MD
       </Button>
+      <Button size="sm" variant="ghost" className="gap-1.5 text-muted-foreground hover:text-foreground" onClick={onExportYaml} title="Export canvas as YAML">
+        <FileDown size={14} /> YAML
+      </Button>
       <Button size="sm" variant="ghost" className="gap-1.5 text-muted-foreground hover:text-foreground" onClick={onShortcuts} title="Keyboard shortcuts (?)">
         <HelpCircle size={14} />
       </Button>

frontend/src/components/panels/__tests__/DetailPanel.test.tsx

@@ -0,0 +1,118 @@
+import { describe, it, expect, vi, beforeEach } from 'vitest'
+import { render, screen } from '@testing-library/react'
+import { DetailPanel } from '../DetailPanel'
+import * as canvasStore from '@/stores/canvasStore'
+import type { NodeData } from '@/types'
+import type { Node } from '@xyflow/react'
+
+vi.mock('@/stores/canvasStore')
+
+function makeNode(data: Partial<NodeData>): Node<NodeData> {
+  return {
+    id: 'n1',
+    type: data.type ?? 'server',
+    position: { x: 0, y: 0 },
+    data: {
+      label: 'Test Node',
+      type: 'server',
+      status: 'online',
+      services: [],
+      ...data,
+    },
+  }
+}
+
+function setupStore(nodeData: Partial<NodeData> = {}) {
+  vi.mocked(canvasStore.useCanvasStore).mockReturnValue({
+    nodes: [makeNode(nodeData)],
+    selectedNodeId: 'n1',
+    setSelectedNode: vi.fn(),
+    deleteNode: vi.fn(),
+    updateNode: vi.fn(),
+  } as unknown as ReturnType<typeof canvasStore.useCanvasStore>)
+}
+
+describe('DetailPanel', () => {
+  beforeEach(() => {
+    vi.mocked(canvasStore.useCanvasStore).mockReturnValue({
+      nodes: [],
+      selectedNodeId: null,
+      setSelectedNode: vi.fn(),
+      deleteNode: vi.fn(),
+      updateNode: vi.fn(),
+    } as unknown as ReturnType<typeof canvasStore.useCanvasStore>)
+  })
+
+  it('renders nothing when no node is selected', () => {
+    const { container } = render(<DetailPanel onEdit={vi.fn()} />)
+    expect(container.firstChild).toBeNull()
+  })
+
+  it('renders node label and status', () => {
+    setupStore({ label: 'My Server', status: 'online' })
+    render(<DetailPanel onEdit={vi.fn()} />)
+    expect(screen.getByText('My Server')).toBeDefined()
+    expect(screen.getByText('online')).toBeDefined()
+  })
+
+  it('renders nothing for groupRect nodes', () => {
+    setupStore({ type: 'groupRect', label: 'Zone' })
+    const { container } = render(<DetailPanel onEdit={vi.fn()} />)
+    expect(container.firstChild).toBeNull()
+  })
+
+  describe('Hardware section', () => {
+    it('does not render hardware section when no hardware data', () => {
+      setupStore({ label: 'Server' })
+      render(<DetailPanel onEdit={vi.fn()} />)
+      expect(screen.queryByText('Hardware')).toBeNull()
+    })
+
+    it('renders hardware section when cpu_count is set', () => {
+      setupStore({ cpu_count: 8 })
+      render(<DetailPanel onEdit={vi.fn()} />)
+      expect(screen.getByText('Hardware')).toBeDefined()
+      expect(screen.getByText('8')).toBeDefined()
+    })
+
+    it('renders cpu_model', () => {
+      setupStore({ cpu_model: 'Intel Xeon E5-2680' })
+      render(<DetailPanel onEdit={vi.fn()} />)
+      expect(screen.getByText('Intel Xeon E5-2680')).toBeDefined()
+    })
+
+    it('formats ram_gb in GB', () => {
+      setupStore({ ram_gb: 32 })
+      render(<DetailPanel onEdit={vi.fn()} />)
+      expect(screen.getByText('32 GB')).toBeDefined()
+    })
+
+    it('formats ram_gb >= 1024 as TB', () => {
+      setupStore({ ram_gb: 2048 })
+      render(<DetailPanel onEdit={vi.fn()} />)
+      expect(screen.getByText('2 TB')).toBeDefined()
+    })
+
+    it('formats disk_gb in GB', () => {
+      setupStore({ disk_gb: 500 })
+      render(<DetailPanel onEdit={vi.fn()} />)
+      expect(screen.getByText('500 GB')).toBeDefined()
+    })
+
+    it('formats disk_gb >= 1024 as TB', () => {
+      setupStore({ disk_gb: 1536 })
+      render(<DetailPanel onEdit={vi.fn()} />)
+      expect(screen.getByText('1.5 TB')).toBeDefined()
+    })
+
+    it('renders all hardware fields together', () => {
+      setupStore({ cpu_count: 16, cpu_model: 'AMD EPYC', ram_gb: 128, disk_gb: 4096 })
+      render(<DetailPanel onEdit={vi.fn()} />)
+      expect(screen.getByText('Hardware')).toBeDefined()
+      expect(screen.getByText('AMD EPYC')).toBeDefined()
+      expect(screen.getByText('16')).toBeDefined()
+      expect(screen.getByText('128 GB')).toBeDefined()
+      expect(screen.getByText('4 TB')).toBeDefined()
+    })
+  })
+})

frontend/src/hooks/useStatusPolling.ts

@@ -23,12 +23,17 @@ export function useStatusPolling() {
     if (STANDALONE || !isAuthenticated || !token) return
 
     const protocol = window.location.protocol === 'https:' ? 'wss' : 'ws'
-    const host = window.location.hostname
+    const host = window.location.host  // includes port when non-standard
-    const url = `${protocol}://${host}:8000/api/v1/status/ws/status?token=${encodeURIComponent(token)}`
+    const url = `${protocol}://${host}/api/v1/status/ws/status`
 
     const ws = new WebSocket(url)
     wsRef.current = ws
 
+    // Send token as first message (not in URL to avoid log/history exposure)
+    ws.onopen = () => {
+      ws.send(JSON.stringify({ token }))
+    }
+
     ws.onmessage = (event) => {
       try {
         const msg: StatusMessage = JSON.parse(event.data)

frontend/src/stores/canvasStore.ts

@@ -10,6 +10,7 @@ import {
   addEdge,
 } from '@xyflow/react'
 import type { NodeData, EdgeData } from '@/types'
+import { generateUUID } from '@/utils/uuid'
 
 type HistoryEntry = { nodes: Node<NodeData>[]; edges: Edge<EdgeData>[] }
 
@@ -108,7 +109,7 @@ export const useCanvasStore = create<CanvasState>((set) => ({
       if (state.clipboard.length === 0) return state
       const newNodes = state.clipboard.map((n) => ({
         ...n,
-        id: crypto.randomUUID(),
+        id: generateUUID(),
         position: { x: n.position.x + 50, y: n.position.y + 50 },
         selected: false,
         parentId: undefined,

frontend/src/types/index.ts

@@ -13,6 +13,7 @@ export type NodeType =
   | 'printer'
   | 'computer'
   | 'cpl'
+  | 'docker'
   | 'generic'
   | 'groupRect'
 
@@ -55,6 +56,11 @@ export interface NodeData extends Record<string, unknown> {
   last_seen?: string
   response_time_ms?: number
   notes?: string
+  cpu_count?: number
+  cpu_model?: string
+  ram_gb?: number
+  disk_gb?: number
+  show_hardware?: boolean
   parent_id?: string
   container_mode?: boolean
   custom_colors?: {
@@ -65,6 +71,7 @@ export interface NodeData extends Record<string, unknown> {
     text_color?: string
     text_position?: TextPosition
     font?: string
+    border_style?: 'solid' | 'dashed' | 'dotted' | 'double' | 'none'
     z_order?: number
     width?: number
     height?: number
@@ -99,6 +106,7 @@ export const NODE_TYPE_LABELS: Record<NodeType, string> = {
   printer: 'Printer',
   computer: 'Computer',
   cpl: 'CPL / Powerline',
+  docker: 'Docker Host',
   generic: 'Generic Device',
   groupRect: 'Group Rectangle',
 }

frontend/src/types/yaml.ts

@@ -0,0 +1,25 @@
+import type { NodeType, EdgeType, CheckMethod } from '@/types'
+
+export interface YamlNodeConnection {
+  label: string
+  linkType?: EdgeType
+  linkLabel?: string
+}
+
+export interface YamlNode {
+  nodeType: NodeType
+  nodeIcon?: string
+  label: string
+  hostname?: string
+  ipAddress?: string
+  checkMethod?: CheckMethod
+  checkTarget?: string
+  notes?: string
+  parent?: YamlNodeConnection
+  clusterR?: YamlNodeConnection
+  clusterL?: YamlNodeConnection
+  cpuModel?: string
+  cpuCore?: number
+  ram?: number
+  disk?: number
+}

frontend/src/utils/__tests__/exportYaml.test.ts

@@ -0,0 +1,130 @@
+import { describe, it, expect } from 'vitest'
+import { exportCanvasToYaml } from '../exportYaml'
+import type { Node, Edge } from '@xyflow/react'
+import type { NodeData, EdgeData } from '@/types'
+import yaml from 'js-yaml'
+
+const makeNode = (overrides: Partial<NodeData> = {}, id = '1', parentId?: string): Node<NodeData> => ({
+  id,
+  type: overrides.type ?? 'server',
+  position: { x: 0, y: 0 },
+  parentId,
+  data: { label: 'Test', type: 'server', status: 'online', services: [], ...overrides },
+})
+
+const makeEdge = (id: string, source: string, target: string, data: Partial<EdgeData> = {}): Edge<EdgeData> => ({
+  id,
+  source,
+  target,
+  data: { type: 'ethernet', ...data } as EdgeData,
+})
+
+describe('exportCanvasToYaml', () => {
+  it('serializes a simple node with basic fields', () => {
+    const nodes = [makeNode({ label: 'My Server', type: 'server', ip: '192.168.1.10', hostname: 'srv.local' })]
+    const result = yaml.load(exportCanvasToYaml(nodes, [])) as object[]
+    expect(result).toHaveLength(1)
+    const entry = result[0] as Record<string, unknown>
+    expect(entry.nodeType).toBe('server')
+    expect(entry.label).toBe('My Server')
+    expect(entry.ipAddress).toBe('192.168.1.10')
+    expect(entry.hostname).toBe('srv.local')
+  })
+
+  it('omits empty/null/undefined optional fields', () => {
+    const nodes = [makeNode({ label: 'Router', type: 'router', hostname: undefined, ip: undefined, notes: undefined })]
+    const result = yaml.load(exportCanvasToYaml(nodes, [])) as object[]
+    const entry = result[0] as Record<string, unknown>
+    expect(entry).not.toHaveProperty('hostname')
+    expect(entry).not.toHaveProperty('ipAddress')
+    expect(entry).not.toHaveProperty('notes')
+  })
+
+  it('omits hardware specs when zero or falsy', () => {
+    const nodes = [makeNode({ label: 'Server', type: 'server', cpu_count: 0, ram_gb: 0, disk_gb: 0 })]
+    const result = yaml.load(exportCanvasToYaml(nodes, [])) as object[]
+    const entry = result[0] as Record<string, unknown>
+    expect(entry).not.toHaveProperty('cpuCore')
+    expect(entry).not.toHaveProperty('ram')
+    expect(entry).not.toHaveProperty('disk')
+  })
+
+  it('includes hardware specs when non-zero', () => {
+    const nodes = [makeNode({ label: 'Server', type: 'server', cpu_count: 16, ram_gb: 64, disk_gb: 2000, cpu_model: 'Intel Xeon' })]
+    const result = yaml.load(exportCanvasToYaml(nodes, [])) as object[]
+    const entry = result[0] as Record<string, unknown>
+    expect(entry.cpuCore).toBe(16)
+    expect(entry.ram).toBe(64)
+    expect(entry.disk).toBe(2000)
+    expect(entry.cpuModel).toBe('Intel Xeon')
+  })
+
+  it('serializes parent relationship from parentId', () => {
+    const parent = makeNode({ label: 'Proxmox1', type: 'proxmox' }, 'pve1')
+    const child = makeNode({ label: 'VM1', type: 'vm' }, 'vm1', 'pve1')
+    const edge = makeEdge('e1', 'pve1', 'vm1', { type: 'virtual' })
+    const result = yaml.load(exportCanvasToYaml([parent, child], [edge])) as object[]
+    const childEntry = (result as Record<string, unknown>[]).find((e) => e.label === 'VM1')!
+    expect(childEntry.parent).toEqual({ label: 'Proxmox1', linkType: 'virtual', linkLabel: '' })
+  })
+
+  it('serializes clusterR edge on source node', () => {
+    const nodeA = makeNode({ label: 'NodeA', type: 'proxmox' }, 'a')
+    const nodeB = makeNode({ label: 'NodeB', type: 'proxmox' }, 'b')
+    const edge = makeEdge('e1', 'a', 'b', { type: 'ethernet', label: '10GbE' })
+    const result = yaml.load(exportCanvasToYaml([nodeA, nodeB], [edge])) as Record<string, unknown>[]
+    const entryA = result.find((e) => e.label === 'NodeA')!
+    expect(entryA.clusterR).toEqual({ label: 'NodeB', linkType: 'ethernet', linkLabel: '10GbE' })
+  })
+
+  it('does not duplicate an edge as both clusterR and clusterL', () => {
+    const nodeA = makeNode({ label: 'NodeA', type: 'proxmox' }, 'a')
+    const nodeB = makeNode({ label: 'NodeB', type: 'proxmox' }, 'b')
+    const edge = makeEdge('e1', 'a', 'b', { type: 'ethernet' })
+    const result = yaml.load(exportCanvasToYaml([nodeA, nodeB], [edge])) as Record<string, unknown>[]
+    const entryA = result.find((e) => e.label === 'NodeA')!
+    const entryB = result.find((e) => e.label === 'NodeB')!
+    // clusterR on A and clusterL on B would duplicate — only one side should have it
+    const hasClusterR = 'clusterR' in entryA
+    const hasClusterL = 'clusterL' in entryB
+    expect(hasClusterR && hasClusterL).toBe(false)
+  })
+
+  it('excludes groupRect nodes from output', () => {
+    const nodes = [
+      makeNode({ label: 'Zone', type: 'groupRect' }, '1'),
+      makeNode({ label: 'Server', type: 'server' }, '2'),
+    ]
+    const result = yaml.load(exportCanvasToYaml(nodes, [])) as object[]
+    expect(result).toHaveLength(1)
+    expect((result[0] as Record<string, unknown>).label).toBe('Server')
+  })
+
+  it('roundtrip: all non-empty fields appear in YAML output', () => {
+    const nodes = [makeNode({
+      label: 'Full Node',
+      type: 'server',
+      ip: '10.0.0.1',
+      hostname: 'full.local',
+      check_method: 'ping',
+      check_target: '10.0.0.1',
+      notes: 'test notes',
+      cpu_model: 'AMD EPYC',
+      cpu_count: 32,
+      ram_gb: 128,
+      disk_gb: 4000,
+      custom_icon: 'star',
+    })]
+    const yamlStr = exportCanvasToYaml(nodes, [])
+    expect(yamlStr).toContain('Full Node')
+    expect(yamlStr).toContain('10.0.0.1')
+    expect(yamlStr).toContain('full.local')
+    expect(yamlStr).toContain('ping')
+    expect(yamlStr).toContain('test notes')
+    expect(yamlStr).toContain('AMD EPYC')
+    expect(yamlStr).toContain('32')
+    expect(yamlStr).toContain('128')
+    expect(yamlStr).toContain('4000')
+    expect(yamlStr).toContain('star')
+  })
+})

frontend/src/utils/__tests__/importYaml.test.ts

@@ -0,0 +1,230 @@
+import { describe, it, expect, vi } from 'vitest'
+import { parseYamlToCanvas } from '../importYaml'
+import type { Node, Edge } from '@xyflow/react'
+import type { NodeData, EdgeData } from '@/types'
+
+// Mock dagre layout to return nodes with predictable positions
+vi.mock('../layout', () => ({
+  applyDagreLayout: (nodes: Node<NodeData>[]) =>
+    nodes.map((n, i) => ({ ...n, position: { x: i * 200, y: 0 } })),
+}))
+
+// Mock uuid to return deterministic ids
+let uuidCounter = 0
+vi.mock('../uuid', () => ({
+  generateUUID: () => `test-uuid-${++uuidCounter}`,
+}))
+
+beforeEach(() => {
+  uuidCounter = 0
+})
+
+const empty: Node<NodeData>[] = []
+const emptyEdges: Edge<EdgeData>[] = []
+
+describe('parseYamlToCanvas', () => {
+  it('parses a minimal node (only nodeType + label)', () => {
+    const yaml = `
+- nodeType: server
+  label: "My Server"
+`
+    const { nodes, edges, imported } = parseYamlToCanvas(yaml, empty, emptyEdges)
+    expect(imported).toBe(1)
+    expect(nodes).toHaveLength(1)
+    expect(nodes[0].data.label).toBe('My Server')
+    expect(nodes[0].data.type).toBe('server')
+    expect(nodes[0].data.status).toBe('unknown')
+    expect(edges).toHaveLength(0)
+  })
+
+  it('parses all scalar fields', () => {
+    const yaml = `
+- nodeType: proxmox
+  label: "PVE1"
+  hostname: "pve1.local"
+  ipAddress: "192.168.1.10"
+  checkMethod: ping
+  checkTarget: "192.168.1.10"
+  notes: "main host"
+  nodeIcon: "custom-icon"
+  cpuModel: "Intel Xeon"
+  cpuCore: 16
+  ram: 64
+  disk: 2000
+`
+    const { nodes } = parseYamlToCanvas(yaml, empty, emptyEdges)
+    const d = nodes[0].data
+    expect(d.hostname).toBe('pve1.local')
+    expect(d.ip).toBe('192.168.1.10')
+    expect(d.check_method).toBe('ping')
+    expect(d.check_target).toBe('192.168.1.10')
+    expect(d.notes).toBe('main host')
+    expect(d.custom_icon).toBe('custom-icon')
+    expect(d.cpu_model).toBe('Intel Xeon')
+    expect(d.cpu_count).toBe(16)
+    expect(d.ram_gb).toBe(64)
+    expect(d.disk_gb).toBe(2000)
+    expect(d.show_hardware).toBe(true)
+  })
+
+  it('sets show_hardware only when hardware fields present', () => {
+    const yaml = `- nodeType: server\n  label: "NoHW"\n`
+    const { nodes } = parseYamlToCanvas(yaml, empty, emptyEdges)
+    expect(nodes[0].data.show_hardware).toBeUndefined()
+  })
+
+  it('parent relationship sets parentId and creates an edge', () => {
+    const yaml = `
+- nodeType: proxmox
+  label: "PVE1"
+- nodeType: vm
+  label: "VM1"
+  parent:
+    label: "PVE1"
+    linkType: virtual
+    linkLabel: "hosted"
+`
+    const { nodes, edges } = parseYamlToCanvas(yaml, empty, emptyEdges)
+    const vm = nodes.find((n) => n.data.label === 'VM1')!
+    const pve = nodes.find((n) => n.data.label === 'PVE1')!
+    expect(vm.parentId).toBe(pve.id)
+    expect(vm.data.parent_id).toBe(pve.id)
+    expect(vm.extent).toBe('parent')
+    expect(edges).toHaveLength(1)
+    expect(edges[0].source).toBe(pve.id)
+    expect(edges[0].target).toBe(vm.id)
+    expect(edges[0].type).toBe('virtual')
+    expect(edges[0].data?.label).toBe('hosted')
+  })
+
+  it('clusterR creates an edge from this node to target', () => {
+    const yaml = `
+- nodeType: proxmox
+  label: "PVE1"
+  clusterR:
+    label: "PVE2"
+    linkType: ethernet
+    linkLabel: "10GbE"
+- nodeType: proxmox
+  label: "PVE2"
+`
+    const { nodes, edges } = parseYamlToCanvas(yaml, empty, emptyEdges)
+    const pve1 = nodes.find((n) => n.data.label === 'PVE1')!
+    const pve2 = nodes.find((n) => n.data.label === 'PVE2')!
+    expect(edges).toHaveLength(1)
+    expect(edges[0].source).toBe(pve1.id)
+    expect(edges[0].target).toBe(pve2.id)
+    expect(edges[0].type).toBe('ethernet')
+  })
+
+  it('clusterL creates an edge from referenced node to this node', () => {
+    const yaml = `
+- nodeType: proxmox
+  label: "PVE1"
+- nodeType: proxmox
+  label: "PVE2"
+  clusterL:
+    label: "PVE1"
+    linkType: cluster
+    linkLabel: ""
+`
+    const { nodes, edges } = parseYamlToCanvas(yaml, empty, emptyEdges)
+    const pve1 = nodes.find((n) => n.data.label === 'PVE1')!
+    const pve2 = nodes.find((n) => n.data.label === 'PVE2')!
+    expect(edges).toHaveLength(1)
+    expect(edges[0].source).toBe(pve1.id)
+    expect(edges[0].target).toBe(pve2.id)
+  })
+
+  it('deduplicates edges when clusterR on A and clusterL on B point to each other', () => {
+    const yaml = `
+- nodeType: proxmox
+  label: "PVE1"
+  clusterR:
+    label: "PVE2"
+    linkType: ethernet
+- nodeType: proxmox
+  label: "PVE2"
+  clusterL:
+    label: "PVE1"
+    linkType: ethernet
+`
+    const { edges } = parseYamlToCanvas(yaml, empty, emptyEdges)
+    expect(edges).toHaveLength(1)
+  })
+
+  it('skips nodes with same label as existing canvas nodes', () => {
+    const existing: Node<NodeData>[] = [{
+      id: 'existing-1',
+      type: 'server',
+      position: { x: 0, y: 0 },
+      data: { label: 'ExistingServer', type: 'server', status: 'online', services: [] },
+    }]
+    const yaml = `
+- nodeType: server
+  label: "ExistingServer"
+- nodeType: router
+  label: "NewRouter"
+`
+    const { nodes, imported } = parseYamlToCanvas(yaml, existing, emptyEdges)
+    expect(imported).toBe(1)
+    expect(nodes.filter((n) => n.data.label === 'ExistingServer')).toHaveLength(1)
+    expect(nodes.filter((n) => n.data.label === 'NewRouter')).toHaveLength(1)
+  })
+
+  it('merges with existing edges without duplicating', () => {
+    const existing: Node<NodeData>[] = [
+      { id: 'a', type: 'server', position: { x: 0, y: 0 }, data: { label: 'A', type: 'server', status: 'online', services: [] } },
+      { id: 'b', type: 'server', position: { x: 0, y: 0 }, data: { label: 'B', type: 'server', status: 'online', services: [] } },
+    ]
+    const existingEdge: Edge<EdgeData>[] = [{
+      id: 'e1', source: 'a', target: 'b', type: 'ethernet',
+      data: { type: 'ethernet' },
+    }]
+    const yaml = `
+- nodeType: server
+  label: "A"
+  clusterR:
+    label: "B"
+    linkType: ethernet
+`
+    // A already exists so it's skipped, no new edge created
+    const { edges } = parseYamlToCanvas(yaml, existing, existingEdge)
+    expect(edges).toHaveLength(1)
+  })
+
+  it('throws on invalid YAML', () => {
+    expect(() => parseYamlToCanvas('{invalid: [yaml', empty, emptyEdges)).toThrow()
+  })
+
+  it('throws when YAML is not an array', () => {
+    const yaml = `nodeType: server\nlabel: oops\n`
+    expect(() => parseYamlToCanvas(yaml, empty, emptyEdges)).toThrow(/list/)
+  })
+
+  it('throws when nodeType is missing', () => {
+    const yaml = `- label: "Missing type"\n`
+    expect(() => parseYamlToCanvas(yaml, empty, emptyEdges)).toThrow(/nodeType/)
+  })
+
+  it('throws when label is missing', () => {
+    const yaml = `- nodeType: server\n`
+    expect(() => parseYamlToCanvas(yaml, empty, emptyEdges)).toThrow(/label/)
+  })
+
+  it('warns and skips unknown parent label without crashing', () => {
+    const warnSpy = vi.spyOn(console, 'warn').mockImplementation(() => {})
+    const yaml = `
+- nodeType: vm
+  label: "OrphanVM"
+  parent:
+    label: "NonexistentHost"
+    linkType: virtual
+`
+    const { nodes, edges } = parseYamlToCanvas(yaml, empty, emptyEdges)
+    expect(nodes).toHaveLength(1)
+    expect(edges).toHaveLength(0)
+    expect(warnSpy).toHaveBeenCalledWith(expect.stringContaining('NonexistentHost'))
+    warnSpy.mockRestore()
+  })
+})

frontend/src/utils/__tests__/nodeIcons.test.ts

@@ -28,6 +28,7 @@ describe('ICON_REGISTRY', () => {
     expect(keys).toContain('play')      // Jellyfin
     expect(keys).toContain('shield')    // Pi-hole
     expect(keys).toContain('anchor')    // Portainer
+    expect(keys).toContain('package')   // Docker Host
     expect(keys).toContain('key')       // Vaultwarden
     expect(keys).toContain('database')  // DB services
     expect(keys).toContain('cctv')      // IP Camera / CCTV

frontend/src/utils/__tests__/themes.test.ts

@@ -4,7 +4,7 @@ import type { NodeType, EdgeType, NodeStatus } from '@/types'
 
 const NODE_TYPES: NodeType[] = [
   'isp', 'router', 'switch', 'server', 'proxmox', 'vm', 'lxc',
-  'nas', 'iot', 'ap', 'camera', 'printer', 'computer', 'cpl', 'generic', 'groupRect',
+  'nas', 'iot', 'ap', 'camera', 'printer', 'computer', 'cpl', 'docker', 'generic', 'groupRect',
 ]
 const EDGE_TYPES: EdgeType[] = ['ethernet', 'wifi', 'iot', 'vlan', 'virtual', 'cluster']
 const STATUS_TYPES: NodeStatus[] = ['online', 'offline', 'pending', 'unknown']
@@ -84,6 +84,7 @@ describe('THEMES', () => {
     expect(d.nodeAccents.server.border).toBe('#a855f7')
     expect(d.nodeAccents.isp.border).toBe('#00d4ff')
     expect(d.nodeAccents.proxmox.border).toBe('#ff6e00')
+    expect(d.nodeAccents.docker.border).toBe('#2496ED')
     expect(d.nodeCardBackground).toBe('#21262d')
     expect(d.nodeIconBackground).toBe('#161b22')
     expect(d.canvasBackground).toBe('#0d1117')

frontend/src/utils/__tests__/uuid.test.ts

@@ -0,0 +1,26 @@
+import { describe, it, expect, vi, afterEach } from 'vitest'
+import { generateUUID } from '../uuid'
+
+const UUID_REGEX = /^[0-9a-f]{8}-[0-9a-f]{4}-4[0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$/i
+
+describe('generateUUID', () => {
+  afterEach(() => {
+    vi.restoreAllMocks()
+  })
+
+  it('returns a valid v4 UUID using crypto.randomUUID when available', () => {
+    const id = generateUUID()
+    expect(id).toMatch(UUID_REGEX)
+  })
+
+  it('returns a valid v4 UUID using crypto.getRandomValues fallback', () => {
+    vi.spyOn(crypto, 'randomUUID' as never).mockImplementation(undefined as never)
+    const id = generateUUID()
+    expect(id).toMatch(UUID_REGEX)
+  })
+
+  it('generates unique IDs', () => {
+    const ids = new Set(Array.from({ length: 100 }, () => generateUUID()))
+    expect(ids.size).toBe(100)
+  })
+})

frontend/src/utils/exportYaml.ts

@@ -0,0 +1,136 @@
+import type { Node, Edge } from '@xyflow/react'
+import type { NodeData, EdgeData, EdgeType } from '@/types'
+import type { YamlNode, YamlNodeConnection } from '@/types/yaml'
+import yaml from 'js-yaml'
+
+/** Build a map of node id → label for edge resolution */
+function buildIdToLabel(nodes: Node<NodeData>[]): Map<string, string> {
+  const m = new Map<string, string>()
+  for (const n of nodes) m.set(n.id, n.data.label)
+  return m
+}
+
+function makeConnection(targetLabel: string, edgeType: EdgeType, edgeLabel: string | undefined): YamlNodeConnection {
+  return {
+    label: targetLabel,
+    linkType: edgeType,
+    linkLabel: edgeLabel ?? '',
+  }
+}
+
+/**
+ * Serialize React Flow canvas state to a YAML string.
+ * Each node becomes one entry; edges are embedded as parent/clusterR/clusterL sub-objects.
+ * Edge deduplication: each edge is written on exactly one side (source as clusterR, target as clusterL)
+ * unless the edge type is 'virtual' or there is a parentId relationship, in which case
+ * it becomes the 'parent' field of the child node.
+ */
+export function exportCanvasToYaml(nodes: Node<NodeData>[], edges: Edge<EdgeData>[]): string {
+  const idToLabel = buildIdToLabel(nodes)
+
+  // Build per-node edge maps (id → connections)
+  // We use a Set to track already-serialized edge ids (deduplication).
+  const serializedEdges = new Set<string>()
+
+  // Index edges by source and target for quick lookup
+  const edgesBySource = new Map<string, Edge<EdgeData>[]>()
+  const edgesByTarget = new Map<string, Edge<EdgeData>[]>()
+  for (const e of edges) {
+    if (!edgesBySource.has(e.source)) edgesBySource.set(e.source, [])
+    edgesBySource.get(e.source)!.push(e)
+    if (!edgesByTarget.has(e.target)) edgesByTarget.set(e.target, [])
+    edgesByTarget.get(e.target)!.push(e)
+  }
+
+  const yamlNodes: YamlNode[] = []
+
+  for (const node of nodes) {
+    const d = node.data
+
+    // Skip groupRect nodes — they are canvas decoration only
+    if (d.type === 'groupRect') continue
+
+    const entry: YamlNode = {
+      nodeType: d.type,
+      label: d.label,
+    }
+
+    if (d.custom_icon) entry.nodeIcon = d.custom_icon
+    if (d.hostname) entry.hostname = d.hostname
+    if (d.ip) entry.ipAddress = d.ip
+    if (d.check_method && d.check_method !== 'none') entry.checkMethod = d.check_method
+    if (d.check_target) entry.checkTarget = d.check_target
+    if (d.notes) entry.notes = d.notes
+
+    // Hardware specs — omit zero values
+    if (d.cpu_model) entry.cpuModel = d.cpu_model
+    if (d.cpu_count && d.cpu_count > 0) entry.cpuCore = d.cpu_count
+    if (d.ram_gb && d.ram_gb > 0) entry.ram = d.ram_gb
+    if (d.disk_gb && d.disk_gb > 0) entry.disk = d.disk_gb
+
+    // Parent relationship: if this node has a parentId in React Flow,
+    // encode it as a 'parent' connection using any virtual edge between them.
+    if (node.parentId) {
+      const parentLabel = idToLabel.get(node.parentId) ?? node.parentId
+      // Find an edge between parent and this node (either direction)
+      const parentEdges = [
+        ...(edgesBySource.get(node.parentId) ?? []).filter((e) => e.target === node.id),
+        ...(edgesByTarget.get(node.parentId) ?? []).filter((e) => e.source === node.id),
+      ]
+      const pEdge = parentEdges[0]
+      const linkType: EdgeType = (pEdge?.data?.type as EdgeType) ?? 'virtual'
+      const linkLabel = pEdge?.data?.label ?? ''
+      entry.parent = { label: parentLabel, linkType, linkLabel: linkLabel as string }
+      if (pEdge) serializedEdges.add(pEdge.id)
+    }
+
+    // Non-parent edges: serialize as clusterR (source side) or clusterL (target side).
+    // We process source edges as clusterR on this node; target edges as clusterL on this node,
+    // but only if the edge hasn't been serialized yet (deduplication: source wins).
+    const sourceEdgesForNode = (edgesBySource.get(node.id) ?? []).filter(
+      (e) => !serializedEdges.has(e.id) && e.target !== node.parentId && e.source !== node.parentId,
+    )
+    for (const e of sourceEdgesForNode) {
+      const targetLabel = idToLabel.get(e.target)
+      if (!targetLabel) continue
+      const edgeType: EdgeType = (e.data?.type as EdgeType) ?? 'ethernet'
+      const edgeLabel = e.data?.label as string | undefined
+      if (!entry.clusterR) {
+        entry.clusterR = makeConnection(targetLabel, edgeType, edgeLabel)
+      }
+      // Only first clusterR wins per node; mark all source edges as serialized
+      serializedEdges.add(e.id)
+    }
+
+    const targetEdgesForNode = (edgesByTarget.get(node.id) ?? []).filter(
+      (e) => !serializedEdges.has(e.id) && e.source !== node.parentId && e.target !== node.parentId,
+    )
+    for (const e of targetEdgesForNode) {
+      const sourceLabel = idToLabel.get(e.source)
+      if (!sourceLabel) continue
+      const edgeType: EdgeType = (e.data?.type as EdgeType) ?? 'ethernet'
+      const edgeLabel = e.data?.label as string | undefined
+      if (!entry.clusterL) {
+        entry.clusterL = makeConnection(sourceLabel, edgeType, edgeLabel)
+      }
+      serializedEdges.add(e.id)
+    }
+
+    yamlNodes.push(entry)
+  }
+
+  return yaml.dump(yamlNodes, { lineWidth: -1, noRefs: true })
+}
+
+/** Trigger a browser file download with the given YAML content */
+export function downloadYaml(content: string, filename = 'homelable-export.yaml'): void {
+  const blob = new Blob([content], { type: 'text/yaml;charset=utf-8' })
+  const url = URL.createObjectURL(blob)
+  const a = document.createElement('a')
+  a.href = url
+  a.download = filename
+  document.body.appendChild(a)
+  a.click()
+  document.body.removeChild(a)
+  URL.revokeObjectURL(url)
+}

frontend/src/utils/importYaml.ts

@@ -0,0 +1,159 @@
+import yaml from 'js-yaml'
+import type { Node, Edge } from '@xyflow/react'
+import type { NodeData, EdgeData } from '@/types'
+import type { YamlNode, YamlNodeConnection } from '@/types/yaml'
+import { generateUUID } from '@/utils/uuid'
+import { applyDagreLayout } from '@/utils/layout'
+
+/**
+ * Parse a YAML string and merge the resulting nodes/edges into the existing canvas.
+ * - Nodes with the same label as an existing node are skipped (no duplicates).
+ * - Positions are computed via dagre auto-layout over the full merged set.
+ */
+export function parseYamlToCanvas(
+  yamlString: string,
+  existingNodes: Node<NodeData>[],
+  existingEdges: Edge<EdgeData>[],
+): { nodes: Node<NodeData>[]; edges: Edge<EdgeData>[]; imported: number } {
+  const raw = yaml.load(yamlString)
+
+  if (!Array.isArray(raw)) {
+    throw new Error('YAML must be a list of node objects (top-level array)')
+  }
+
+  const entries = raw as unknown[]
+
+  // Build lookup: label → existing node id (existing canvas + nodes being added)
+  const labelToId = new Map<string, string>()
+  for (const n of existingNodes) {
+    labelToId.set(n.data.label, n.id)
+  }
+
+  // First pass: validate and create nodes (without positions — dagre will assign them)
+  const newNodes: Node<NodeData>[] = []
+  const yamlNodes: YamlNode[] = []
+
+  for (const entry of entries) {
+    const raw = entry as Record<string, unknown>
+
+    if (!raw.nodeType || typeof raw.nodeType !== 'string') {
+      throw new Error(`Each YAML entry must have a "nodeType" string field`)
+    }
+    if (!raw.label || typeof raw.label !== 'string') {
+      throw new Error(`Each YAML entry must have a "label" string field`)
+    }
+
+    const yn = raw as unknown as YamlNode
+
+    // Skip if a node with this label already exists on the canvas
+    if (labelToId.has(yn.label)) {
+      console.warn(`[importYaml] Skipping duplicate label: "${yn.label}"`)
+      continue
+    }
+
+    const id = generateUUID()
+    labelToId.set(yn.label, id)
+
+    const hasHardware = !!(yn.cpuModel || yn.cpuCore || yn.ram || yn.disk)
+
+    const data: NodeData = {
+      label: yn.label,
+      type: yn.nodeType,
+      status: 'unknown',
+      services: [],
+      ...(yn.hostname ? { hostname: yn.hostname } : {}),
+      ...(yn.ipAddress ? { ip: yn.ipAddress } : {}),
+      ...(yn.checkMethod ? { check_method: yn.checkMethod } : {}),
+      ...(yn.checkTarget ? { check_target: yn.checkTarget } : {}),
+      ...(yn.notes ? { notes: yn.notes } : {}),
+      ...(yn.nodeIcon ? { custom_icon: yn.nodeIcon } : {}),
+      ...(yn.cpuModel ? { cpu_model: yn.cpuModel } : {}),
+      ...(yn.cpuCore ? { cpu_count: yn.cpuCore } : {}),
+      ...(yn.ram ? { ram_gb: yn.ram } : {}),
+      ...(yn.disk ? { disk_gb: yn.disk } : {}),
+      ...(hasHardware ? { show_hardware: true } : {}),
+    }
+
+    newNodes.push({
+      id,
+      type: yn.nodeType,
+      position: { x: 0, y: 0 },
+      data,
+    })
+
+    yamlNodes.push(yn)
+  }
+
+  // Second pass: apply parent relationships (parentId / parent_id)
+  const newEdges: Edge<EdgeData>[] = []
+  // Track edge pairs to deduplicate (store as "sourceId|targetId")
+  const edgePairs = new Set<string>(
+    existingEdges.map((e) => `${e.source}|${e.target}`)
+  )
+
+  function addEdgeIfNew(
+    sourceId: string,
+    targetId: string,
+    conn: YamlNodeConnection,
+  ) {
+    const key = `${sourceId}|${targetId}`
+    const reverseKey = `${targetId}|${sourceId}`
+    if (edgePairs.has(key) || edgePairs.has(reverseKey)) return
+    edgePairs.add(key)
+    const edgeType = conn.linkType ?? 'ethernet'
+    newEdges.push({
+      id: generateUUID(),
+      source: sourceId,
+      target: targetId,
+      type: edgeType,
+      data: {
+        type: edgeType,
+        ...(conn.linkLabel ? { label: conn.linkLabel } : {}),
+      },
+    })
+  }
+
+  for (let i = 0; i < newNodes.length; i++) {
+    const node = newNodes[i]
+    const yn = yamlNodes[i]
+
+    if (yn.parent) {
+      const parentId = labelToId.get(yn.parent.label)
+      if (!parentId) {
+        console.warn(`[importYaml] parent label not found: "${yn.parent.label}" — skipping relationship`)
+      } else {
+        // Set React Flow parentId for nesting
+        node.data = { ...node.data, parent_id: parentId }
+        node.parentId = parentId
+        node.extent = 'parent'
+        // Also create an edge
+        addEdgeIfNew(parentId, node.id, yn.parent)
+      }
+    }
+
+    if (yn.clusterR) {
+      const targetId = labelToId.get(yn.clusterR.label)
+      if (!targetId) {
+        console.warn(`[importYaml] clusterR label not found: "${yn.clusterR.label}" — skipping`)
+      } else {
+        addEdgeIfNew(node.id, targetId, yn.clusterR)
+      }
+    }
+
+    if (yn.clusterL) {
+      const sourceId = labelToId.get(yn.clusterL.label)
+      if (!sourceId) {
+        console.warn(`[importYaml] clusterL label not found: "${yn.clusterL.label}" — skipping`)
+      } else {
+        addEdgeIfNew(sourceId, node.id, yn.clusterL)
+      }
+    }
+  }
+
+  // Merge and apply layout
+  const mergedNodes = [...existingNodes, ...newNodes]
+  const mergedEdges = [...existingEdges, ...newEdges]
+  const laidOut = applyDagreLayout(mergedNodes, mergedEdges)
+
+  return { nodes: laidOut, edges: mergedEdges, imported: newNodes.length }
+}

frontend/src/utils/nodeIcons.ts

@@ -14,7 +14,7 @@ import {
   // Transfers & sync
   Download, Upload, RefreshCw,
   // Containers & Dev
-  Anchor, GitBranch, Terminal, Code2, Settings,
+  Anchor, Package, GitBranch, Terminal, Code2, Settings,
   // Communications
   Mail, MessageSquare, Phone,
   // Misc devices
@@ -98,6 +98,7 @@ export const ICON_REGISTRY: IconEntry[] = [
 
   // --- Containers & Dev ---
   { key: 'anchor',    label: 'Portainer / Docker',   category: 'Dev & Containers', icon: Anchor },
+  { key: 'package',   label: 'Docker Host',          category: 'Dev & Containers', icon: Package },
   { key: 'gitbranch', label: 'Gitea / Gitlab',       category: 'Dev & Containers', icon: GitBranch },
   { key: 'terminal',  label: 'SSH / Shell',          category: 'Dev & Containers', icon: Terminal },
   { key: 'code',      label: 'VS Code Server',       category: 'Dev & Containers', icon: Code2 },

frontend/src/utils/themes.ts

@@ -56,6 +56,7 @@ export const THEMES: Record<ThemeId, ThemePreset> = {
         printer:  { border: '#8b949e', icon: '#8b949e' },
         computer: { border: '#a855f7', icon: '#a855f7' },
         cpl:      { border: '#e3b341', icon: '#e3b341' },
+        docker:   { border: '#2496ED', icon: '#2496ED' },
         generic:  { border: '#8b949e', icon: '#8b949e' },
         groupRect:{ border: '#00d4ff', icon: '#00d4ff' },
       },
@@ -109,6 +110,7 @@ export const THEMES: Record<ThemeId, ThemePreset> = {
         printer:  { border: '#94a3b8', icon: '#94a3b8' },
         computer: { border: '#c084fc', icon: '#c084fc' },
         cpl:      { border: '#fbbf24', icon: '#fbbf24' },
+        docker:   { border: '#2496ED', icon: '#2496ED' },
         generic:  { border: '#94a3b8', icon: '#94a3b8' },
         groupRect:{ border: '#22d3ee', icon: '#22d3ee' },
       },
@@ -162,6 +164,7 @@ export const THEMES: Record<ThemeId, ThemePreset> = {
         printer:  { border: '#6b7280', icon: '#6b7280' },
         computer: { border: '#7c3aed', icon: '#7c3aed' },
         cpl:      { border: '#b45309', icon: '#b45309' },
+        docker:   { border: '#2496ED', icon: '#2496ED' },
         generic:  { border: '#6b7280', icon: '#6b7280' },
         groupRect:{ border: '#0284c7', icon: '#0284c7' },
       },
@@ -215,6 +218,7 @@ export const THEMES: Record<ThemeId, ThemePreset> = {
         printer:  { border: '#8888ff', icon: '#8888ff' },
         computer: { border: '#ff00ff', icon: '#ff00ff' },
         cpl:      { border: '#ffff00', icon: '#ffff00' },
+        docker:   { border: '#00aaff', icon: '#00aaff' },
         generic:  { border: '#8888ff', icon: '#8888ff' },
         groupRect:{ border: '#00ffff', icon: '#00ffff' },
       },
@@ -268,6 +272,7 @@ export const THEMES: Record<ThemeId, ThemePreset> = {
         printer:  { border: '#005500', icon: '#005500' },
         computer: { border: '#008822', icon: '#008822' },
         cpl:      { border: '#66ff33', icon: '#66ff33' },
+        docker:   { border: '#00cc88', icon: '#00cc88' },
         generic:  { border: '#006600', icon: '#006600' },
         groupRect:{ border: '#00ff41', icon: '#00ff41' },
       },

frontend/src/utils/uuid.ts

@@ -0,0 +1,25 @@
+/**
+ * Generates a UUID v4.
+ * Falls back to a manual implementation when crypto.randomUUID is unavailable
+ * (HTTP non-secure contexts, older browsers).
+ */
+export function generateUUID(): string {
+  if (typeof crypto !== 'undefined' && typeof crypto.randomUUID === 'function') {
+    return crypto.randomUUID()
+  }
+  // Fallback: RFC 4122 v4 UUID using crypto.getRandomValues if available
+  if (typeof crypto !== 'undefined' && typeof crypto.getRandomValues === 'function') {
+    const bytes = new Uint8Array(16)
+    crypto.getRandomValues(bytes)
+    bytes[6] = (bytes[6] & 0x0f) | 0x40
+    bytes[8] = (bytes[8] & 0x3f) | 0x80
+    return [...bytes]
+      .map((b, i) => ([4, 6, 8, 10].includes(i) ? '-' : '') + b.toString(16).padStart(2, '0'))
+      .join('')
+  }
+  // Last resort: Math.random based (not cryptographically secure)
+  return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, (c) => {
+    const r = (Math.random() * 16) | 0
+    return (c === 'x' ? r : (r & 0x3) | 0x8).toString(16)
+  })
+}

frontend/tsconfig.app.json

@@ -28,5 +28,6 @@
       "@/*": ["./src/*"]
     }
   },
-  "include": ["src"]
+  "include": ["src"],
+  "exclude": ["src/**/__tests__/**", "src/test/**"]
 }

mcp/.env.example

@@ -0,0 +1,12 @@
+# MCP Server — copy to .env and fill in values
+
+# Authenticates AI clients (Claude Code, Claude Desktop, etc.) → MCP server
+# Generate: python3 -c "import secrets; print('mcp_sk_' + secrets.token_hex(24))"
+MCP_API_KEY=mcp_sk_changeme
+
+# Authenticates MCP server → backend (must match MCP_SERVICE_KEY in backend .env)
+# Generate: python3 -c "import secrets; print('svc_' + secrets.token_hex(24))"
+MCP_SERVICE_KEY=svc_changeme
+
+# Backend URL — use http://backend:8000 in Docker, http://localhost:8000 for local dev
+BACKEND_URL=http://localhost:8000

mcp/Dockerfile.mcp

@@ -0,0 +1,10 @@
+FROM python:3.13-slim
+
+WORKDIR /app
+
+COPY requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt
+
+COPY app/ ./app/
+
+CMD ["uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "8001"]

mcp/app/auth.py

@@ -0,0 +1,44 @@
+import hmac
+import json
+from starlette.types import ASGIApp, Receive, Scope, Send
+
+from .config import settings
+
+_BYPASS_PATHS = {"/health", "/register"}
+
+
+class ApiKeyMiddleware:
+    """Pure ASGI middleware — compatible with SSE/streaming responses.
+
+    BaseHTTPMiddleware buffers the full response body and breaks SSE streams.
+    This implementation operates at the ASGI scope level and never touches
+    the response stream.
+    """
+
+    def __init__(self, app: ASGIApp) -> None:
+        self.app = app
+
+    async def __call__(self, scope: Scope, receive: Receive, send: Send) -> None:
+        if scope["type"] != "http":
+            await self.app(scope, receive, send)
+            return
+
+        path: str = scope.get("path", "")
+
+        if path in _BYPASS_PATHS or path.startswith("/.well-known/"):
+            await self.app(scope, receive, send)
+            return
+
+        headers = dict(scope.get("headers", []))
+        key = headers.get(b"x-api-key", b"").decode()
+        expected = settings.mcp_api_key
+
+        if not key or not hmac.compare_digest(key.encode(), expected.encode()):
+            body = json.dumps({"detail": "Invalid or missing X-API-Key"}).encode()
+            await send({"type": "http.response.start", "status": 401,
+                        "headers": [(b"content-type", b"application/json"),
+                                    (b"content-length", str(len(body)).encode())]})
+            await send({"type": "http.response.body", "body": body, "more_body": False})
+            return
+
+        await self.app(scope, receive, send)

mcp/app/backend_client.py

@@ -0,0 +1,40 @@
+import httpx
+from .config import settings
+
+
+class BackendClient:
+    def __init__(self):
+        self._client: httpx.AsyncClient | None = None
+
+    async def start(self):
+        self._client = httpx.AsyncClient(
+            base_url=settings.backend_url,
+            headers={"X-MCP-Service-Key": settings.mcp_service_key},
+            timeout=30.0,
+        )
+
+    async def stop(self):
+        if self._client:
+            await self._client.aclose()
+
+    async def request(self, method: str, path: str, **kwargs) -> dict:
+        resp = await self._client.request(method, path, **kwargs)
+        resp.raise_for_status()
+        if resp.status_code == 204:
+            return {}
+        return resp.json()
+
+    async def get(self, path: str) -> dict | list:
+        return await self.request("GET", path)
+
+    async def post(self, path: str, body: dict) -> dict:
+        return await self.request("POST", path, json=body)
+
+    async def patch(self, path: str, body: dict) -> dict:
+        return await self.request("PATCH", path, json=body)
+
+    async def delete(self, path: str) -> dict:
+        return await self.request("DELETE", path)
+
+
+backend = BackendClient()

mcp/app/config.py

@@ -0,0 +1,12 @@
+from pydantic_settings import BaseSettings
+
+
+class Settings(BaseSettings):
+    mcp_api_key: str = "mcp_sk_changeme"       # AI client → MCP server
+    mcp_service_key: str = "svc_changeme"       # MCP server → backend
+    backend_url: str = "http://backend:8000"
+
+    model_config = {"env_file": ".env", "extra": "ignore"}
+
+
+settings = Settings()

mcp/app/main.py

@@ -0,0 +1,42 @@
+from contextlib import asynccontextmanager
+from fastapi import FastAPI, Request
+from mcp.server import Server
+from mcp.server.streamable_http_manager import StreamableHTTPSessionManager
+
+from .auth import ApiKeyMiddleware
+from .backend_client import backend
+from .resources import register_resources
+from .tools import register_tools
+
+
+mcp_server = Server("homelable")
+register_resources(mcp_server)
+register_tools(mcp_server)
+
+session_manager = StreamableHTTPSessionManager(
+    app=mcp_server,
+    json_response=False,
+    stateless=True,
+)
+
+
+@asynccontextmanager
+async def lifespan(app: FastAPI):
+    await backend.start()
+    async with session_manager.run():
+        yield
+    await backend.stop()
+
+
+app = FastAPI(title="Homelable MCP", lifespan=lifespan)
+app.add_middleware(ApiKeyMiddleware)
+
+
+@app.api_route("/mcp", methods=["GET", "POST", "DELETE"])
+async def mcp_endpoint(request: Request):
+    await session_manager.handle_request(request.scope, request.receive, request._send)
+
+
+@app.get("/health")
+async def health():
+    return {"status": "ok"}

mcp/app/resources.py

@@ -0,0 +1,43 @@
+import json
+from mcp.server import Server
+from mcp.types import Resource, TextContent
+from .backend_client import backend
+
+RESOURCE_LIST = [
+    Resource(uri="homelable://canvas",        name="Canvas",          description="Full canvas state (nodes + edges + viewport)", mimeType="application/json"),
+    Resource(uri="homelable://nodes",          name="Nodes",           description="All nodes in the homelab", mimeType="application/json"),
+    Resource(uri="homelable://edges",          name="Edges",           description="All network edges/links", mimeType="application/json"),
+    Resource(uri="homelable://scan/pending",   name="Pending devices", description="Discovered devices awaiting approval", mimeType="application/json"),
+    Resource(uri="homelable://scan/runs",      name="Scan history",    description="Recent scan run history", mimeType="application/json"),
+]
+
+ROUTES = {
+    "homelable://canvas":       "/api/v1/canvas",
+    "homelable://nodes":        "/api/v1/nodes",
+    "homelable://edges":        "/api/v1/edges",
+    "homelable://scan/pending": "/api/v1/scan/pending",
+    "homelable://scan/runs":    "/api/v1/scan/runs",
+}
+
+
+async def read_resource(uri: str) -> list[TextContent]:
+    if uri.startswith("homelable://nodes/") and uri != "homelable://nodes/":
+        node_id = uri.split("/")[-1]
+        data = await backend.get(f"/api/v1/nodes/{node_id}")
+        return [TextContent(type="text", text=json.dumps(data, indent=2))]
+
+    if uri not in ROUTES:
+        raise ValueError(f"Unknown resource URI: {uri}")
+
+    data = await backend.get(ROUTES[uri])
+    return [TextContent(type="text", text=json.dumps(data, indent=2))]
+
+
+def register_resources(server: Server):
+    @server.list_resources()
+    async def _list():
+        return RESOURCE_LIST
+
+    @server.read_resource()
+    async def _read(uri: str):
+        return await read_resource(uri)

mcp/app/tools.py

@@ -0,0 +1,154 @@
+import json
+from mcp.server import Server
+from mcp.types import Tool, TextContent
+from .backend_client import backend
+
+
+def register_tools(server: Server):
+
+    @server.list_tools()
+    async def list_tools():
+        return [
+            Tool(name="create_node", description="Add a new node to the homelab canvas", inputSchema={
+                "type": "object",
+                "required": ["type", "label"],
+                "properties": {
+                    "type":     {"type": "string", "enum": ["isp","router","switch","server","proxmox","vm","lxc","nas","iot","ap","generic"]},
+                    "label":    {"type": "string"},
+                    "ip":       {"type": "string"},
+                    "hostname": {"type": "string"},
+                    "status":   {"type": "string", "enum": ["online","offline","unknown","pending"], "default": "unknown"},
+                },
+            }),
+            Tool(name="update_node", description="Update an existing node", inputSchema={
+                "type": "object",
+                "required": ["id"],
+                "properties": {
+                    "id":        {"type": "string"},
+                    "label":     {"type": "string"},
+                    "ip":        {"type": "string"},
+                    "hostname":  {"type": "string"},
+                    "status":    {"type": "string"},
+                    "parent_id": {"type": "string", "description": "ID of the parent node (e.g. Proxmox host for a VM/LXC). Pass null to detach."},
+                },
+            }),
+            Tool(name="delete_node", description="Delete a node from the canvas", inputSchema={
+                "type": "object",
+                "required": ["id"],
+                "properties": {"id": {"type": "string"}},
+            }),
+            Tool(name="create_edge", description="Create a network link between two nodes", inputSchema={
+                "type": "object",
+                "required": ["source", "target"],
+                "properties": {
+                    "source": {"type": "string"},
+                    "target": {"type": "string"},
+                    "type":   {"type": "string", "enum": ["ethernet","wifi","iot","vlan","virtual"], "default": "ethernet"},
+                    "label":  {"type": "string"},
+                },
+            }),
+            Tool(name="delete_edge", description="Delete a network link", inputSchema={
+                "type": "object",
+                "required": ["id"],
+                "properties": {"id": {"type": "string"}},
+            }),
+            Tool(name="trigger_scan", description="Trigger a network discovery scan", inputSchema={
+                "type": "object",
+                "properties": {
+                    "ranges": {"type": "array", "items": {"type": "string"}, "description": "CIDR ranges to scan (uses configured defaults if omitted)"},
+                },
+            }),
+            Tool(name="approve_device", description="Approve a pending discovered device and create a node", inputSchema={
+                "type": "object",
+                "required": ["id"],
+                "properties": {
+                    "id":    {"type": "string"},
+                    "type":  {"type": "string", "enum": ["isp","router","switch","server","proxmox","vm","lxc","nas","iot","ap","generic"], "default": "generic"},
+                    "label": {"type": "string"},
+                },
+            }),
+            Tool(name="hide_device", description="Hide a pending discovered device", inputSchema={
+                "type": "object",
+                "required": ["id"],
+                "properties": {"id": {"type": "string"}},
+            }),
+            Tool(name="get_canvas", description="Get the full canvas: all nodes and edges in the homelab topology", inputSchema={
+                "type": "object",
+                "properties": {},
+            }),
+            Tool(name="list_nodes", description="List all nodes (devices) in the homelab", inputSchema={
+                "type": "object",
+                "properties": {},
+            }),
+            Tool(name="list_pending_devices", description="List devices discovered by scan but not yet approved or hidden", inputSchema={
+                "type": "object",
+                "properties": {},
+            }),
+        ]
+
+    @server.call_tool()
+    async def call_tool(name: str, arguments: dict):
+        result = await _dispatch(name, arguments)
+        return [TextContent(type="text", text=json.dumps(result, indent=2))]
+
+
+def _slim_canvas(raw: dict) -> dict:
+    """Strip React Flow layout/style fields — keep only semantic data for AI use."""
+    NODE_KEEP = {"id", "type", "label", "ip", "hostname", "status", "services", "description", "parentId"}
+    EDGE_KEEP = {"id", "source", "target", "type", "label"}
+
+    def slim_node(n: dict) -> dict:
+        data = n.get("data", {})
+        out = {k: v for k, v in data.items() if k in NODE_KEEP and v not in (None, "", [])}
+        out["id"] = n.get("id")
+        out["node_type"] = n.get("type")
+        return out
+
+    def slim_edge(e: dict) -> dict:
+        return {k: v for k, v in e.items() if k in EDGE_KEEP and v not in (None, "")}
+
+    return {
+        "nodes": [slim_node(n) for n in raw.get("nodes", [])],
+        "edges": [slim_edge(e) for e in raw.get("edges", [])],
+    }
+
+
+async def _dispatch(name: str, args: dict) -> dict:
+    if name == "create_node":
+        return await backend.post("/api/v1/nodes", args)
+
+    if name == "update_node":
+        node_id = args.pop("id")
+        return await backend.patch(f"/api/v1/nodes/{node_id}", args)
+
+    if name == "delete_node":
+        return await backend.delete(f"/api/v1/nodes/{args['id']}")
+
+    if name == "create_edge":
+        return await backend.post("/api/v1/edges", args)
+
+    if name == "delete_edge":
+        return await backend.delete(f"/api/v1/edges/{args['id']}")
+
+    if name == "trigger_scan":
+        body = {"ranges": args["ranges"]} if "ranges" in args else {}
+        return await backend.post("/api/v1/scan/trigger", body)
+
+    if name == "approve_device":
+        device_id = args.pop("id")
+        return await backend.post(f"/api/v1/scan/pending/{device_id}/approve", args)
+
+    if name == "hide_device":
+        return await backend.post(f"/api/v1/scan/pending/{args['id']}/hide", {})
+
+    if name == "get_canvas":
+        raw = await backend.get("/api/v1/canvas")
+        return _slim_canvas(raw)
+
+    if name == "list_nodes":
+        return await backend.get("/api/v1/nodes")
+
+    if name == "list_pending_devices":
+        return await backend.get("/api/v1/scan/pending")
+
+    raise ValueError(f"Unknown tool: {name}")

mcp/pytest.ini

@@ -0,0 +1,2 @@
+[pytest]
+pythonpath = .

mcp/requirements.txt

@@ -0,0 +1,5 @@
+mcp[cli]>=1.0
+httpx>=0.27
+fastapi>=0.115
+uvicorn[standard]>=0.30
+pydantic-settings>=2.0

mcp/tests/conftest.py

@@ -0,0 +1,33 @@
+import os
+import pytest
+from unittest.mock import AsyncMock, patch
+from httpx import AsyncClient, ASGITransport
+
+os.environ.setdefault("MCP_API_KEY", "test_key")
+os.environ.setdefault("BACKEND_URL", "http://testbackend")
+os.environ.setdefault("AUTH_USERNAME", "admin")
+os.environ.setdefault("AUTH_PASSWORD", "admin")
+
+from app.main import app  # noqa: E402
+
+
+@pytest.fixture
+def api_key():
+    return "test_key"
+
+
+@pytest.fixture
+async def client(api_key):
+    async with AsyncClient(transport=ASGITransport(app=app), base_url="http://test") as c:
+        yield c
+
+
+@pytest.fixture
+def mock_backend():
+    with patch("app.resources.backend") as mock_res, \
+         patch("app.tools.backend") as mock_tools:
+        mock_res.get = AsyncMock()
+        mock_tools.post = AsyncMock()
+        mock_tools.patch = AsyncMock()
+        mock_tools.delete = AsyncMock()
+        yield {"resources": mock_res, "tools": mock_tools}

mcp/tests/test_auth.py

@@ -0,0 +1,28 @@
+import pytest
+from unittest.mock import AsyncMock, patch
+
+
+@pytest.mark.anyio
+async def test_health_no_key(client):
+    resp = await client.get("/health")
+    assert resp.status_code == 200
+
+
+@pytest.mark.anyio
+async def test_missing_api_key(client):
+    resp = await client.get("/mcp")
+    assert resp.status_code == 401
+
+
+@pytest.mark.anyio
+async def test_wrong_api_key(client):
+    resp = await client.get("/mcp", headers={"X-API-Key": "wrong"})
+    assert resp.status_code == 401
+
+
+@pytest.mark.anyio
+async def test_valid_api_key_passes(client, api_key):
+    # Auth passes — mock handle_request so we don't need a live MCP session
+    with patch("app.main.session_manager.handle_request", new_callable=AsyncMock):
+        resp = await client.get("/mcp", headers={"X-API-Key": api_key})
+    assert resp.status_code != 401

mcp/tests/test_resources.py

@@ -0,0 +1,47 @@
+import pytest
+from unittest.mock import AsyncMock, patch
+from app.resources import read_resource
+
+
+@pytest.fixture
+def mock_backend():
+    with patch("app.resources.backend") as m:
+        m.get = AsyncMock(return_value={"data": "ok"})
+        yield m
+
+
+@pytest.mark.anyio
+async def test_read_canvas(mock_backend):
+    result = await read_resource("homelable://canvas")
+    mock_backend.get.assert_called_once_with("/api/v1/canvas")
+    assert len(result) == 1
+
+
+@pytest.mark.anyio
+async def test_read_nodes(mock_backend):
+    await read_resource("homelable://nodes")
+    mock_backend.get.assert_called_once_with("/api/v1/nodes")
+
+
+@pytest.mark.anyio
+async def test_read_edges(mock_backend):
+    await read_resource("homelable://edges")
+    mock_backend.get.assert_called_once_with("/api/v1/edges")
+
+
+@pytest.mark.anyio
+async def test_read_single_node(mock_backend):
+    await read_resource("homelable://nodes/abc123")
+    mock_backend.get.assert_called_once_with("/api/v1/nodes/abc123")
+
+
+@pytest.mark.anyio
+async def test_read_scan_pending(mock_backend):
+    await read_resource("homelable://scan/pending")
+    mock_backend.get.assert_called_once_with("/api/v1/scan/pending")
+
+
+@pytest.mark.anyio
+async def test_read_unknown_uri(mock_backend):
+    with pytest.raises(ValueError, match="Unknown resource URI"):
+        await read_resource("homelable://unknown")

mcp/tests/test_tools.py

@@ -0,0 +1,122 @@
+import pytest
+from unittest.mock import AsyncMock, patch
+from app.tools import _dispatch
+
+
+@pytest.fixture
+def mock_backend():
+    with patch("app.tools.backend") as m:
+        m.post = AsyncMock(return_value={"id": "1"})
+        m.patch = AsyncMock(return_value={"id": "1"})
+        m.delete = AsyncMock(return_value={})
+        m.get = AsyncMock(return_value=[])
+        yield m
+
+
+@pytest.mark.anyio
+async def test_create_node(mock_backend):
+    result = await _dispatch("create_node", {"type": "server", "label": "Proxmox"})
+    mock_backend.post.assert_called_once_with("/api/v1/nodes", {"type": "server", "label": "Proxmox"})
+    assert result == {"id": "1"}
+
+
+@pytest.mark.anyio
+async def test_update_node(mock_backend):
+    await _dispatch("update_node", {"id": "42", "label": "New name"})
+    mock_backend.patch.assert_called_once_with("/api/v1/nodes/42", {"label": "New name"})
+
+
+@pytest.mark.anyio
+async def test_update_node_parent_id(mock_backend):
+    await _dispatch("update_node", {"id": "42", "parent_id": "proxmox-1"})
+    mock_backend.patch.assert_called_once_with("/api/v1/nodes/42", {"parent_id": "proxmox-1"})
+
+
+@pytest.mark.anyio
+async def test_delete_node(mock_backend):
+    await _dispatch("delete_node", {"id": "42"})
+    mock_backend.delete.assert_called_once_with("/api/v1/nodes/42")
+
+
+@pytest.mark.anyio
+async def test_create_edge(mock_backend):
+    await _dispatch("create_edge", {"source": "1", "target": "2", "type": "ethernet"})
+    mock_backend.post.assert_called_once_with("/api/v1/edges", {"source": "1", "target": "2", "type": "ethernet"})
+
+
+@pytest.mark.anyio
+async def test_delete_edge(mock_backend):
+    await _dispatch("delete_edge", {"id": "99"})
+    mock_backend.delete.assert_called_once_with("/api/v1/edges/99")
+
+
+@pytest.mark.anyio
+async def test_trigger_scan_no_ranges(mock_backend):
+    await _dispatch("trigger_scan", {})
+    mock_backend.post.assert_called_once_with("/api/v1/scan/trigger", {})
+
+
+@pytest.mark.anyio
+async def test_trigger_scan_with_ranges(mock_backend):
+    await _dispatch("trigger_scan", {"ranges": ["192.168.1.0/24"]})
+    mock_backend.post.assert_called_once_with("/api/v1/scan/trigger", {"ranges": ["192.168.1.0/24"]})
+
+
+@pytest.mark.anyio
+async def test_approve_device(mock_backend):
+    await _dispatch("approve_device", {"id": "5", "type": "server", "label": "MyServer"})
+    mock_backend.post.assert_called_once_with("/api/v1/scan/pending/5/approve", {"type": "server", "label": "MyServer"})
+
+
+@pytest.mark.anyio
+async def test_hide_device(mock_backend):
+    await _dispatch("hide_device", {"id": "5"})
+    mock_backend.post.assert_called_once_with("/api/v1/scan/pending/5/hide", {})
+
+
+@pytest.mark.anyio
+async def test_get_canvas(mock_backend):
+    mock_backend.get = AsyncMock(return_value={
+        "nodes": [
+            {
+                "id": "n1",
+                "type": "router",
+                "position": {"x": 100, "y": 200},
+                "width": 160,
+                "height": 80,
+                "data": {"label": "Freebox", "ip": "192.168.1.1", "status": "online"},
+            }
+        ],
+        "edges": [
+            {"id": "e1", "source": "n1", "target": "n2", "type": "ethernet", "animated": True, "style": {"stroke": "#fff"}},
+        ],
+        "viewport": {"x": 0, "y": 0, "zoom": 1},
+    })
+    result = await _dispatch("get_canvas", {})
+    mock_backend.get.assert_called_once_with("/api/v1/canvas")
+    # Layout/style fields stripped, only semantic data kept
+    assert result["nodes"] == [{"id": "n1", "node_type": "router", "label": "Freebox", "ip": "192.168.1.1", "status": "online"}]
+    assert result["edges"] == [{"id": "e1", "source": "n1", "target": "n2", "type": "ethernet"}]
+    assert "viewport" not in result
+
+
+@pytest.mark.anyio
+async def test_list_nodes(mock_backend):
+    mock_backend.get = AsyncMock(return_value=[{"id": "1", "label": "Freebox"}])
+    result = await _dispatch("list_nodes", {})
+    mock_backend.get.assert_called_once_with("/api/v1/nodes")
+    assert result == [{"id": "1", "label": "Freebox"}]
+
+
+@pytest.mark.anyio
+async def test_list_pending_devices(mock_backend):
+    mock_backend.get = AsyncMock(return_value=[{"id": "p1", "ip": "192.168.1.50"}])
+    result = await _dispatch("list_pending_devices", {})
+    mock_backend.get.assert_called_once_with("/api/v1/scan/pending")
+    assert result == [{"id": "p1", "ip": "192.168.1.50"}]
+
+
+@pytest.mark.anyio
+async def test_unknown_tool():
+    with pytest.raises(ValueError, match="Unknown tool"):
+        await _dispatch("nonexistent", {})

scripts/update.sh

@@ -0,0 +1,66 @@
+#!/usr/bin/env bash
+# Homelable — update to latest version
+# Run inside the LXC / any Linux host where lxc-install.sh was used:
+#   bash /opt/homelable/scripts/update.sh
+# Or pull-and-run directly:
+#   bash <(curl -fsSL https://raw.githubusercontent.com/Pouzor/homelable/main/scripts/update.sh)
+
+set -euo pipefail
+
+INSTALL_DIR=/opt/homelable
+
+RED='\033[0;31m'; GREEN='\033[0;32m'; YELLOW='\033[1;33m'; NC='\033[0m'
+info()  { echo -e "${GREEN}[homelable]${NC} $*"; }
+warn()  { echo -e "${YELLOW}[homelable]${NC} $*"; }
+error() { echo -e "${RED}[homelable]${NC} $*"; exit 1; }
+
+[[ $EUID -ne 0 ]] && error "Run as root (sudo bash ...)"
+[[ -d "$INSTALL_DIR/.git" ]] || error "Homelable not found at $INSTALL_DIR — run lxc-install.sh first"
+
+# ── Pull latest code ──────────────────────────────────────────────────────────
+info "Pulling latest code..."
+BEFORE=$(git -C "$INSTALL_DIR" rev-parse HEAD)
+git -C "$INSTALL_DIR" pull --quiet
+AFTER=$(git -C "$INSTALL_DIR" rev-parse HEAD)
+
+if [[ "$BEFORE" == "$AFTER" ]]; then
+  info "Already up to date."
+  exit 0
+fi
+
+echo ""
+info "Changes since last update:"
+git -C "$INSTALL_DIR" log --oneline "${BEFORE}..${AFTER}"
+echo ""
+
+# ── Stop backend ─────────────────────────────────────────────────────────────
+info "Stopping backend service..."
+systemctl stop homelable-backend
+
+# ── Backend deps ─────────────────────────────────────────────────────────────
+info "Updating Python dependencies..."
+cd "$INSTALL_DIR/backend"
+.venv/bin/pip install --quiet -r requirements.txt
+
+# ── Frontend build ────────────────────────────────────────────────────────────
+info "Rebuilding frontend..."
+cd "$INSTALL_DIR/frontend"
+npm ci --silent
+npm run build
+
+# ── nginx config ─────────────────────────────────────────────────────────────
+info "Updating nginx config..."
+sed \
+  -e 's|http://backend:8000|http://127.0.0.1:8000|g' \
+  -e "s|/usr/share/nginx/html|$INSTALL_DIR/frontend/dist|g" \
+  "$INSTALL_DIR/docker/nginx.conf" > /etc/nginx/sites-available/homelable
+nginx -t && systemctl reload nginx
+
+# ── Restart backend ───────────────────────────────────────────────────────────
+info "Starting backend service..."
+systemctl start homelable-backend
+
+echo ""
+echo -e "  ${GREEN}Homelable updated successfully!${NC}"
+echo -e "  Running at http://$(hostname -I | awk '{print $1}')"
+echo ""