[pull] main from fern-api:main

generators/csharp/base/src/proto/CsharpProtobufTypeMapper.ts

@@ -983,6 +983,9 @@ function getValueForLiteral({ literal }: { literal: Literal }, csharp: CSharp):
 /*
  * Protobuf enums remove the stutter in their generated enum value names.
  * For example, the enum value `Status.StatusActive` becomes `Status.Active`.
+ *
+ * If the resulting name starts with a digit, protobuf's C# codegen prepends
+ * an underscore (e.g., `VIDEO_ASPECT_RATIO_1_1` becomes `_11`).
  */
 function getProtobufEnumValueName({
     generation,
@@ -994,5 +997,9 @@ function getProtobufEnumValueName({
     enumValue: EnumValue;
 }): string {
     const enumValueName = enumValue.name.name.pascalCase.safeName;
-    return enumValueName.replace(classReference.name, "");
+    const stripped = enumValueName.replace(classReference.name, "");
+    if (/^\d/.test(stripped)) {
+        return `_${stripped}`;
+    }
+    return stripped;
 }

generators/csharp/sdk/versions.yml

@@ -1,4 +1,12 @@
 # yaml-language-server: $schema=../../../fern-versions-yml.schema.json
+- version: 2.30.1
+  changelogEntry:
+    - summary: |
+        Fix gRPC code generation to support enums with numeric identifiers.
+      type: fix
+  createdAt: "2026-03-13"
+  irVersion: 65
+
 - version: 2.30.0
   changelogEntry:
     - summary: |

packages/cli/fern-definition/ir-to-jsonschema/src/__test__/__snapshots__/csharp-grpc-proto-exhaustive/type__AspectRatio.json

@@ -0,0 +1,11 @@
+{
+  "type": "string",
+  "enum": [
+    "ASPECT_RATIO_UNSPECIFIED",
+    "ASPECT_RATIO_1_1",
+    "ASPECT_RATIO_16_9",
+    "ASPECT_RATIO_9_16",
+    "ASPECT_RATIO_4_3"
+  ],
+  "definitions": {}
+}

packages/cli/fern-definition/ir-to-jsonschema/src/__test__/__snapshots__/csharp-grpc-proto-exhaustive/type__IndexType.json

@@ -0,0 +1,9 @@
+{
+  "type": "string",
+  "enum": [
+    "INDEX_TYPE_INVALID",
+    "INDEX_TYPE_DEFAULT",
+    "INDEX_TYPE_STRICT"
+  ],
+  "definitions": {}
+}

packages/cli/fern-definition/ir-to-jsonschema/src/__test__/__snapshots__/csharp-grpc-proto-exhaustive/type__UpdateResponse.json

@@ -15,7 +15,7 @@
     "index_type": {
       "oneOf": [
         {
-          "$ref": "#/definitions/dataservice.IndexType"
+          "$ref": "#/definitions/IndexType"
         },
         {
           "type": "null"
@@ -37,7 +37,7 @@
         {
           "type": "array",
           "items": {
-            "$ref": "#/definitions/dataservice.IndexType"
+            "$ref": "#/definitions/IndexType"
           }
         },
         {
@@ -48,7 +48,7 @@
   },
   "additionalProperties": false,
   "definitions": {
-    "dataservice.IndexType": {
+    "IndexType": {
       "type": "string",
       "enum": [
         "INDEX_TYPE_INVALID",