NDI output

config/runtime-host.schema.json

@@ -90,6 +90,7 @@
       "type": "string",
       "enum": [
         "decklink",
+        "ndi",
         "none",
         "disabled",
         "off"
@@ -155,17 +156,17 @@
     "output": {
       "type": "object",
       "additionalProperties": false,
-      "description": "Video output backend configuration. NDI output is not implemented yet; use DeckLink or disable output.",
+      "description": "Video output backend configuration.",
       "properties": {
         "backend": {
           "$ref": "#/$defs/outputBackend",
           "default": "decklink",
-          "description": "Output backend. Currently 'decklink' and disabled aliases are supported. 'ndi' is reserved for future output work and will be rejected as unsupported at runtime today."
+          "description": "Output backend. Use 'decklink' for Blackmagic playout, 'ndi' for NDI send, or 'none'/'disabled'/'off' to disable scheduled output."
         },
         "device": {
           "type": "string",
           "default": "default",
-          "description": "Output device selector. DeckLink currently uses the first compatible/default output device."
+          "description": "Output device selector. DeckLink currently uses the first compatible/default output device. NDI uses this as the advertised sender name; 'default' becomes 'Render Cadence'."
         },
         "resolution": {
           "$ref": "#/$defs/resolution",