Sessions required (#5548)

Co-authored-by: Douwe Osinga <douwe@squareup.com>

ui/desktop/openapi.json

@@ -4127,10 +4127,6 @@
           "currently_running": {
             "type": "boolean"
           },
-          "execution_mode": {
-            "type": "string",
-            "nullable": true
-          },
           "id": {
             "type": "string"
           },
@@ -4226,6 +4222,9 @@
             "type": "string",
             "nullable": true
           },
+          "session_type": {
+            "$ref": "#/components/schemas/SessionType"
+          },
           "total_tokens": {
             "type": "integer",
             "format": "int32",
@@ -4344,6 +4343,15 @@
           }
         }
       },
+      "SessionType": {
+        "type": "string",
+        "enum": [
+          "user",
+          "scheduled",
+          "sub_agent",
+          "hidden"
+        ]
+      },
       "SessionsQuery": {
         "type": "object",
         "properties": {