diff --git a/spec.json b/spec.json
index e66ba25..e5d0f23 100644
--- a/spec.json
+++ b/spec.json
@@ -15364,6 +15364,25 @@
           "updated_at"
         ]
       },
+      "CutType": {
+        "description": "What kind of cut to do",
+        "oneOf": [
+          {
+            "description": "Round off an edge.",
+            "type": "string",
+            "enum": [
+              "fillet"
+            ]
+          },
+          {
+            "description": "Cut away an edge.",
+            "type": "string",
+            "enum": [
+              "chamfer"
+            ]
+          }
+        ]
+      },
       "DefaultCameraFocusOn": {
         "description": "The response from the `DefaultCameraFocusOn` command.",
         "type": "object"
@@ -18761,6 +18780,45 @@
               "type"
             ]
           },
+          {
+            "description": "Command for revolving a solid 2d.",
+            "type": "object",
+            "properties": {
+              "face_ids": {
+                "description": "Which faces to remove, leaving only the shell.",
+                "type": "array",
+                "items": {
+                  "type": "string",
+                  "format": "uuid"
+                }
+              },
+              "object_id": {
+                "description": "Which Solid3D is being shelled.",
+                "type": "string",
+                "format": "uuid"
+              },
+              "shell_thickness": {
+                "description": "How thick the shell should be. Smaller values mean a thinner shell.",
+                "allOf": [
+                  {
+                    "$ref": "#/components/schemas/LengthUnit"
+                  }
+                ]
+              },
+              "type": {
+                "type": "string",
+                "enum": [
+                  "solid3d_shell_face"
+                ]
+              }
+            },
+            "required": [
+              "face_ids",
+              "object_id",
+              "shell_thickness",
+              "type"
+            ]
+          },
           {
             "description": "Command for revolving a solid 2d about a brep edge",
             "type": "object",
@@ -20036,6 +20094,15 @@
             "description": "Fillets the given edge with the specified radius.",
             "type": "object",
             "properties": {
+              "cut_type": {
+                "description": "How to apply the cut.",
+                "default": "fillet",
+                "allOf": [
+                  {
+                    "$ref": "#/components/schemas/CutType"
+                  }
+                ]
+              },
               "edge_id": {
                 "description": "Which edge you want to fillet.",
                 "type": "string",