diff --git a/__fixtures__/misc/output-base64/misc/eval_request.ts b/__fixtures__/misc/output-base64/misc/eval_request.ts
index 881c09e02..711589138 100644
--- a/__fixtures__/misc/output-base64/misc/eval_request.ts
+++ b/__fixtures__/misc/output-base64/misc/eval_request.ts
@@ -123,7 +123,7 @@ export interface EvalRequest {
   opt: FeatureSet_Utf8Validation;
   graph?: TestNest_Graph;
   /** deprecated option */
-  deprecated: string;
+  deprecated?: string;
 }
 export interface EvalRequestProtoMsg {
   typeUrl: "/misc.EvalRequest";
@@ -173,7 +173,7 @@ export interface EvalRequestSDKType {
   test_array: string[];
   opt: FeatureSet_Utf8Validation;
   graph?: TestNest_GraphSDKType;
-  deprecated: string;
+  deprecated?: string;
 }
 export interface AccessConfig {
   sender: string;
@@ -424,7 +424,7 @@ function createBaseEvalRequest(): EvalRequest {
     testArray: [],
     opt: 0,
     graph: undefined,
-    deprecated: ""
+    deprecated: undefined
   };
 }
 export const EvalRequest = {
@@ -469,7 +469,7 @@ export const EvalRequest = {
     if (message.graph !== undefined) {
       TestNest_Graph.encode(message.graph, writer.uint32(130).fork()).ldelim();
     }
-    if (message.deprecated !== "") {
+    if (message.deprecated !== undefined) {
       writer.uint32(138).string(message.deprecated);
     }
     return writer;
@@ -617,7 +617,7 @@ export const EvalRequest = {
     if (object.graph !== undefined && object.graph !== null) {
       message.graph = TestNest_Graph.fromPartial(object.graph);
     }
-    message.deprecated = object.deprecated ?? "";
+    message.deprecated = object.deprecated ?? undefined;
     return message;
   },
   fromSDK(object: EvalRequestSDKType): EvalRequest {
@@ -669,7 +669,7 @@ export const EvalRequest = {
       test_array: Array.isArray(object?.test_array) ? object.test_array.map((e: any) => String(e)) : [],
       opt: isSet(object.opt) ? featureSet_Utf8ValidationFromJSON(object.opt) : -1,
       graph: isSet(object.graph) ? TestNest_Graph.fromSDKJSON(object.graph) : undefined,
-      deprecated: isSet(object.deprecated) ? String(object.deprecated) : ""
+      deprecated: isSet(object.deprecated) ? String(object.deprecated) : undefined
     };
   },
   toSDK(message: EvalRequest): EvalRequestSDKType {
@@ -777,7 +777,7 @@ export const EvalRequest = {
     }
     obj.opt = message.opt ?? 0;
     obj.graph = message.graph ? TestNest_Graph.toAmino(message.graph) : undefined;
-    obj.deprecated = message.deprecated === "" ? undefined : message.deprecated;
+    obj.deprecated = message.deprecated === null ? undefined : message.deprecated;
     return obj;
   },
   fromAminoMsg(object: EvalRequestAminoMsg): EvalRequest {
diff --git a/__fixtures__/misc/output-decimals/agoric/misc/eval_request.ts b/__fixtures__/misc/output-decimals/agoric/misc/eval_request.ts
index 881c09e02..711589138 100644
--- a/__fixtures__/misc/output-decimals/agoric/misc/eval_request.ts
+++ b/__fixtures__/misc/output-decimals/agoric/misc/eval_request.ts
@@ -123,7 +123,7 @@ export interface EvalRequest {
   opt: FeatureSet_Utf8Validation;
   graph?: TestNest_Graph;
   /** deprecated option */
-  deprecated: string;
+  deprecated?: string;
 }
 export interface EvalRequestProtoMsg {
   typeUrl: "/misc.EvalRequest";
@@ -173,7 +173,7 @@ export interface EvalRequestSDKType {
   test_array: string[];
   opt: FeatureSet_Utf8Validation;
   graph?: TestNest_GraphSDKType;
-  deprecated: string;
+  deprecated?: string;
 }
 export interface AccessConfig {
   sender: string;
@@ -424,7 +424,7 @@ function createBaseEvalRequest(): EvalRequest {
     testArray: [],
     opt: 0,
     graph: undefined,
-    deprecated: ""
+    deprecated: undefined
   };
 }
 export const EvalRequest = {
@@ -469,7 +469,7 @@ export const EvalRequest = {
     if (message.graph !== undefined) {
       TestNest_Graph.encode(message.graph, writer.uint32(130).fork()).ldelim();
     }
-    if (message.deprecated !== "") {
+    if (message.deprecated !== undefined) {
       writer.uint32(138).string(message.deprecated);
     }
     return writer;
@@ -617,7 +617,7 @@ export const EvalRequest = {
     if (object.graph !== undefined && object.graph !== null) {
       message.graph = TestNest_Graph.fromPartial(object.graph);
     }
-    message.deprecated = object.deprecated ?? "";
+    message.deprecated = object.deprecated ?? undefined;
     return message;
   },
   fromSDK(object: EvalRequestSDKType): EvalRequest {
@@ -669,7 +669,7 @@ export const EvalRequest = {
       test_array: Array.isArray(object?.test_array) ? object.test_array.map((e: any) => String(e)) : [],
       opt: isSet(object.opt) ? featureSet_Utf8ValidationFromJSON(object.opt) : -1,
       graph: isSet(object.graph) ? TestNest_Graph.fromSDKJSON(object.graph) : undefined,
-      deprecated: isSet(object.deprecated) ? String(object.deprecated) : ""
+      deprecated: isSet(object.deprecated) ? String(object.deprecated) : undefined
     };
   },
   toSDK(message: EvalRequest): EvalRequestSDKType {
@@ -777,7 +777,7 @@ export const EvalRequest = {
     }
     obj.opt = message.opt ?? 0;
     obj.graph = message.graph ? TestNest_Graph.toAmino(message.graph) : undefined;
-    obj.deprecated = message.deprecated === "" ? undefined : message.deprecated;
+    obj.deprecated = message.deprecated === null ? undefined : message.deprecated;
     return obj;
   },
   fromAminoMsg(object: EvalRequestAminoMsg): EvalRequest {
diff --git a/__fixtures__/misc/output-proto-amino/amino-interface-proto-optionality/misc/eval_request.ts b/__fixtures__/misc/output-proto-amino/amino-interface-proto-optionality/misc/eval_request.ts
index e6b3c0865..24272378f 100644
--- a/__fixtures__/misc/output-proto-amino/amino-interface-proto-optionality/misc/eval_request.ts
+++ b/__fixtures__/misc/output-proto-amino/amino-interface-proto-optionality/misc/eval_request.ts
@@ -124,7 +124,7 @@ export interface EvalRequest {
   opt: FeatureSet_Utf8Validation;
   graph?: TestNest_Graph;
   /** deprecated option */
-  deprecated: string;
+  deprecated?: string;
 }
 export interface EvalRequestProtoMsg {
   typeUrl: "/misc.EvalRequest";
@@ -152,7 +152,7 @@ export interface EvalRequestAmino {
   opt: FeatureSet_Utf8Validation;
   graph?: TestNest_GraphAmino;
   /** deprecated option */
-  deprecated: string;
+  deprecated?: string;
 }
 export interface EvalRequestAminoMsg {
   type: "/misc.EvalRequest";
@@ -174,7 +174,7 @@ export interface EvalRequestSDKType {
   test_array: string[];
   opt: FeatureSet_Utf8Validation;
   graph?: TestNest_GraphSDKType;
-  deprecated: string;
+  deprecated?: string;
 }
 export interface AccessConfig {
   sender: string;
@@ -427,19 +427,19 @@ function createBaseEvalRequest(): EvalRequest {
     testArray: [],
     opt: 0,
     graph: undefined,
-    deprecated: ""
+    deprecated: undefined
   };
 }
 export const EvalRequest = {
   typeUrl: "/misc.EvalRequest",
   is(o: any): o is EvalRequest {
-    return o && (o.$typeUrl === EvalRequest.typeUrl || isSet(o.bindings) && isSet(o.refs) && typeof o.testNum === "number" && typeof o.testString === "string" && typeof o.testBool === "boolean" && Array.isArray(o.testArray) && (!o.testArray.length || typeof o.testArray[0] === "string") && isSet(o.opt) && typeof o.deprecated === "string");
+    return o && (o.$typeUrl === EvalRequest.typeUrl || isSet(o.bindings) && isSet(o.refs) && typeof o.testNum === "number" && typeof o.testString === "string" && typeof o.testBool === "boolean" && Array.isArray(o.testArray) && (!o.testArray.length || typeof o.testArray[0] === "string") && isSet(o.opt));
   },
   isSDK(o: any): o is EvalRequestSDKType {
-    return o && (o.$typeUrl === EvalRequest.typeUrl || isSet(o.bindings) && isSet(o.refs) && typeof o.test_num === "number" && typeof o.test_string === "string" && typeof o.test_bool === "boolean" && Array.isArray(o.test_array) && (!o.test_array.length || typeof o.test_array[0] === "string") && isSet(o.opt) && typeof o.deprecated === "string");
+    return o && (o.$typeUrl === EvalRequest.typeUrl || isSet(o.bindings) && isSet(o.refs) && typeof o.test_num === "number" && typeof o.test_string === "string" && typeof o.test_bool === "boolean" && Array.isArray(o.test_array) && (!o.test_array.length || typeof o.test_array[0] === "string") && isSet(o.opt));
   },
   isAmino(o: any): o is EvalRequestAmino {
-    return o && (o.$typeUrl === EvalRequest.typeUrl || isSet(o.bindings) && isSet(o.refs) && typeof o.test_num === "number" && typeof o.test_string === "string" && typeof o.test_bool === "boolean" && Array.isArray(o.test_array) && (!o.test_array.length || typeof o.test_array[0] === "string") && isSet(o.opt) && typeof o.deprecated === "string");
+    return o && (o.$typeUrl === EvalRequest.typeUrl || isSet(o.bindings) && isSet(o.refs) && typeof o.test_num === "number" && typeof o.test_string === "string" && typeof o.test_bool === "boolean" && Array.isArray(o.test_array) && (!o.test_array.length || typeof o.test_array[0] === "string") && isSet(o.opt));
   },
   encode(message: EvalRequest, writer: BinaryWriter = BinaryWriter.create()): BinaryWriter {
     Object.entries(message.bindings).forEach(([key, value]) => {
@@ -481,7 +481,7 @@ export const EvalRequest = {
     if (message.graph !== undefined) {
       TestNest_Graph.encode(message.graph, writer.uint32(130).fork()).ldelim();
     }
-    if (message.deprecated !== "") {
+    if (message.deprecated !== undefined) {
       writer.uint32(138).string(message.deprecated);
     }
     return writer;
@@ -629,7 +629,7 @@ export const EvalRequest = {
     if (object.graph !== undefined && object.graph !== null) {
       message.graph = TestNest_Graph.fromPartial(object.graph);
     }
-    message.deprecated = object.deprecated ?? "";
+    message.deprecated = object.deprecated ?? undefined;
     return message;
   },
   fromSDK(object: EvalRequestSDKType): EvalRequest {
@@ -681,7 +681,7 @@ export const EvalRequest = {
       test_array: Array.isArray(object?.test_array) ? object.test_array.map((e: any) => String(e)) : [],
       opt: isSet(object.opt) ? featureSet_Utf8ValidationFromJSON(object.opt) : -1,
       graph: isSet(object.graph) ? TestNest_Graph.fromSDKJSON(object.graph) : undefined,
-      deprecated: isSet(object.deprecated) ? String(object.deprecated) : ""
+      deprecated: isSet(object.deprecated) ? String(object.deprecated) : undefined
     };
   },
   toSDK(message: EvalRequest): EvalRequestSDKType {
@@ -789,7 +789,7 @@ export const EvalRequest = {
     }
     obj.opt = message.opt ?? 0;
     obj.graph = message.graph ? TestNest_Graph.toAmino(message.graph) : undefined;
-    obj.deprecated = message.deprecated === "" ? undefined : message.deprecated;
+    obj.deprecated = message.deprecated === null ? undefined : message.deprecated;
     return obj;
   },
   fromAminoMsg(object: EvalRequestAminoMsg): EvalRequest {
diff --git a/__fixtures__/misc/output-proto-amino/amino-interface/misc/eval_request.ts b/__fixtures__/misc/output-proto-amino/amino-interface/misc/eval_request.ts
index dd755efba..3f20e6058 100644
--- a/__fixtures__/misc/output-proto-amino/amino-interface/misc/eval_request.ts
+++ b/__fixtures__/misc/output-proto-amino/amino-interface/misc/eval_request.ts
@@ -124,7 +124,7 @@ export interface EvalRequest {
   opt: FeatureSet_Utf8Validation;
   graph?: TestNest_Graph;
   /** deprecated option */
-  deprecated: string;
+  deprecated?: string;
 }
 export interface EvalRequestProtoMsg {
   typeUrl: "/misc.EvalRequest";
@@ -174,7 +174,7 @@ export interface EvalRequestSDKType {
   test_array: string[];
   opt: FeatureSet_Utf8Validation;
   graph?: TestNest_GraphSDKType;
-  deprecated: string;
+  deprecated?: string;
 }
 export interface AccessConfig {
   sender: string;
@@ -427,19 +427,19 @@ function createBaseEvalRequest(): EvalRequest {
     testArray: [],
     opt: 0,
     graph: undefined,
-    deprecated: ""
+    deprecated: undefined
   };
 }
 export const EvalRequest = {
   typeUrl: "/misc.EvalRequest",
   is(o: any): o is EvalRequest {
-    return o && (o.$typeUrl === EvalRequest.typeUrl || isSet(o.bindings) && isSet(o.refs) && typeof o.testNum === "number" && typeof o.testString === "string" && typeof o.testBool === "boolean" && Array.isArray(o.testArray) && (!o.testArray.length || typeof o.testArray[0] === "string") && isSet(o.opt) && typeof o.deprecated === "string");
+    return o && (o.$typeUrl === EvalRequest.typeUrl || isSet(o.bindings) && isSet(o.refs) && typeof o.testNum === "number" && typeof o.testString === "string" && typeof o.testBool === "boolean" && Array.isArray(o.testArray) && (!o.testArray.length || typeof o.testArray[0] === "string") && isSet(o.opt));
   },
   isSDK(o: any): o is EvalRequestSDKType {
-    return o && (o.$typeUrl === EvalRequest.typeUrl || isSet(o.bindings) && isSet(o.refs) && typeof o.test_num === "number" && typeof o.test_string === "string" && typeof o.test_bool === "boolean" && Array.isArray(o.test_array) && (!o.test_array.length || typeof o.test_array[0] === "string") && isSet(o.opt) && typeof o.deprecated === "string");
+    return o && (o.$typeUrl === EvalRequest.typeUrl || isSet(o.bindings) && isSet(o.refs) && typeof o.test_num === "number" && typeof o.test_string === "string" && typeof o.test_bool === "boolean" && Array.isArray(o.test_array) && (!o.test_array.length || typeof o.test_array[0] === "string") && isSet(o.opt));
   },
   isAmino(o: any): o is EvalRequestAmino {
-    return o && (o.$typeUrl === EvalRequest.typeUrl || isSet(o.bindings) && isSet(o.refs) && typeof o.test_num === "number" && typeof o.test_string === "string" && typeof o.test_bool === "boolean" && Array.isArray(o.test_array) && (!o.test_array.length || typeof o.test_array[0] === "string") && isSet(o.opt) && typeof o.deprecated === "string");
+    return o && (o.$typeUrl === EvalRequest.typeUrl || isSet(o.bindings) && isSet(o.refs) && typeof o.test_num === "number" && typeof o.test_string === "string" && typeof o.test_bool === "boolean" && Array.isArray(o.test_array) && (!o.test_array.length || typeof o.test_array[0] === "string") && isSet(o.opt));
   },
   encode(message: EvalRequest, writer: BinaryWriter = BinaryWriter.create()): BinaryWriter {
     Object.entries(message.bindings).forEach(([key, value]) => {
@@ -481,7 +481,7 @@ export const EvalRequest = {
     if (message.graph !== undefined) {
       TestNest_Graph.encode(message.graph, writer.uint32(130).fork()).ldelim();
     }
-    if (message.deprecated !== "") {
+    if (message.deprecated !== undefined) {
       writer.uint32(138).string(message.deprecated);
     }
     return writer;
@@ -629,7 +629,7 @@ export const EvalRequest = {
     if (object.graph !== undefined && object.graph !== null) {
       message.graph = TestNest_Graph.fromPartial(object.graph);
     }
-    message.deprecated = object.deprecated ?? "";
+    message.deprecated = object.deprecated ?? undefined;
     return message;
   },
   fromSDK(object: EvalRequestSDKType): EvalRequest {
@@ -681,7 +681,7 @@ export const EvalRequest = {
       test_array: Array.isArray(object?.test_array) ? object.test_array.map((e: any) => String(e)) : [],
       opt: isSet(object.opt) ? featureSet_Utf8ValidationFromJSON(object.opt) : -1,
       graph: isSet(object.graph) ? TestNest_Graph.fromSDKJSON(object.graph) : undefined,
-      deprecated: isSet(object.deprecated) ? String(object.deprecated) : ""
+      deprecated: isSet(object.deprecated) ? String(object.deprecated) : undefined
     };
   },
   toSDK(message: EvalRequest): EvalRequestSDKType {
@@ -789,7 +789,7 @@ export const EvalRequest = {
     }
     obj.opt = message.opt ?? 0;
     obj.graph = message.graph ? TestNest_Graph.toAmino(message.graph) : undefined;
-    obj.deprecated = message.deprecated === "" ? undefined : message.deprecated;
+    obj.deprecated = message.deprecated === null ? undefined : message.deprecated;
     return obj;
   },
   fromAminoMsg(object: EvalRequestAminoMsg): EvalRequest {
diff --git a/__fixtures__/misc/output-proto-amino/amino-legacy/misc/eval_request.ts b/__fixtures__/misc/output-proto-amino/amino-legacy/misc/eval_request.ts
index 842859c8c..6f53d88c6 100644
--- a/__fixtures__/misc/output-proto-amino/amino-legacy/misc/eval_request.ts
+++ b/__fixtures__/misc/output-proto-amino/amino-legacy/misc/eval_request.ts
@@ -106,7 +106,7 @@ export interface EvalRequest {
   opt: FeatureSet_Utf8Validation;
   graph?: TestNest_Graph;
   /** deprecated option */
-  deprecated: string;
+  deprecated?: string;
 }
 export interface EvalRequestProtoMsg {
   typeUrl: "/misc.EvalRequest";
@@ -128,7 +128,7 @@ export interface EvalRequestSDKType {
   test_array: string[];
   opt: FeatureSet_Utf8Validation;
   graph?: TestNest_GraphSDKType;
-  deprecated: string;
+  deprecated?: string;
 }
 export interface AccessConfig {
   sender: string;
@@ -364,7 +364,7 @@ function createBaseEvalRequest(): EvalRequest {
     testArray: [],
     opt: 0,
     graph: undefined,
-    deprecated: ""
+    deprecated: undefined
   };
 }
 export const EvalRequest = {
@@ -409,7 +409,7 @@ export const EvalRequest = {
     if (message.graph !== undefined) {
       TestNest_Graph.encode(message.graph, writer.uint32(130).fork()).ldelim();
     }
-    if (message.deprecated !== "") {
+    if (message.deprecated !== undefined) {
       writer.uint32(138).string(message.deprecated);
     }
     return writer;
@@ -557,7 +557,7 @@ export const EvalRequest = {
     if (object.graph !== undefined && object.graph !== null) {
       message.graph = TestNest_Graph.fromPartial(object.graph);
     }
-    message.deprecated = object.deprecated ?? "";
+    message.deprecated = object.deprecated ?? undefined;
     return message;
   },
   fromSDK(object: EvalRequestSDKType): EvalRequest {
@@ -609,7 +609,7 @@ export const EvalRequest = {
       test_array: Array.isArray(object?.test_array) ? object.test_array.map((e: any) => String(e)) : [],
       opt: isSet(object.opt) ? featureSet_Utf8ValidationFromJSON(object.opt) : -1,
       graph: isSet(object.graph) ? TestNest_Graph.fromSDKJSON(object.graph) : undefined,
-      deprecated: isSet(object.deprecated) ? String(object.deprecated) : ""
+      deprecated: isSet(object.deprecated) ? String(object.deprecated) : undefined
     };
   },
   toSDK(message: EvalRequest): EvalRequestSDKType {
@@ -717,7 +717,7 @@ export const EvalRequest = {
     }
     obj.opt = message.opt ?? 0;
     obj.graph = message.graph ? TestNest_Graph.toAmino(message.graph) : undefined;
-    obj.deprecated = message.deprecated === "" ? undefined : message.deprecated;
+    obj.deprecated = message.deprecated === null ? undefined : message.deprecated;
     return obj;
   },
   fromAminoMsg(object: EvalRequestAminoMsg): EvalRequest {
diff --git a/__fixtures__/misc/output-proto-amino/amino-msg-no-func/misc/eval_request.ts b/__fixtures__/misc/output-proto-amino/amino-msg-no-func/misc/eval_request.ts
index 881c09e02..711589138 100644
--- a/__fixtures__/misc/output-proto-amino/amino-msg-no-func/misc/eval_request.ts
+++ b/__fixtures__/misc/output-proto-amino/amino-msg-no-func/misc/eval_request.ts
@@ -123,7 +123,7 @@ export interface EvalRequest {
   opt: FeatureSet_Utf8Validation;
   graph?: TestNest_Graph;
   /** deprecated option */
-  deprecated: string;
+  deprecated?: string;
 }
 export interface EvalRequestProtoMsg {
   typeUrl: "/misc.EvalRequest";
@@ -173,7 +173,7 @@ export interface EvalRequestSDKType {
   test_array: string[];
   opt: FeatureSet_Utf8Validation;
   graph?: TestNest_GraphSDKType;
-  deprecated: string;
+  deprecated?: string;
 }
 export interface AccessConfig {
   sender: string;
@@ -424,7 +424,7 @@ function createBaseEvalRequest(): EvalRequest {
     testArray: [],
     opt: 0,
     graph: undefined,
-    deprecated: ""
+    deprecated: undefined
   };
 }
 export const EvalRequest = {
@@ -469,7 +469,7 @@ export const EvalRequest = {
     if (message.graph !== undefined) {
       TestNest_Graph.encode(message.graph, writer.uint32(130).fork()).ldelim();
     }
-    if (message.deprecated !== "") {
+    if (message.deprecated !== undefined) {
       writer.uint32(138).string(message.deprecated);
     }
     return writer;
@@ -617,7 +617,7 @@ export const EvalRequest = {
     if (object.graph !== undefined && object.graph !== null) {
       message.graph = TestNest_Graph.fromPartial(object.graph);
     }
-    message.deprecated = object.deprecated ?? "";
+    message.deprecated = object.deprecated ?? undefined;
     return message;
   },
   fromSDK(object: EvalRequestSDKType): EvalRequest {
@@ -669,7 +669,7 @@ export const EvalRequest = {
       test_array: Array.isArray(object?.test_array) ? object.test_array.map((e: any) => String(e)) : [],
       opt: isSet(object.opt) ? featureSet_Utf8ValidationFromJSON(object.opt) : -1,
       graph: isSet(object.graph) ? TestNest_Graph.fromSDKJSON(object.graph) : undefined,
-      deprecated: isSet(object.deprecated) ? String(object.deprecated) : ""
+      deprecated: isSet(object.deprecated) ? String(object.deprecated) : undefined
     };
   },
   toSDK(message: EvalRequest): EvalRequestSDKType {
@@ -777,7 +777,7 @@ export const EvalRequest = {
     }
     obj.opt = message.opt ?? 0;
     obj.graph = message.graph ? TestNest_Graph.toAmino(message.graph) : undefined;
-    obj.deprecated = message.deprecated === "" ? undefined : message.deprecated;
+    obj.deprecated = message.deprecated === null ? undefined : message.deprecated;
     return obj;
   },
   fromAminoMsg(object: EvalRequestAminoMsg): EvalRequest {
diff --git a/__fixtures__/misc/output-proto-amino/amino-msg-with-func/misc/eval_request.ts b/__fixtures__/misc/output-proto-amino/amino-msg-with-func/misc/eval_request.ts
index c21595a52..2201c5b6d 100644
--- a/__fixtures__/misc/output-proto-amino/amino-msg-with-func/misc/eval_request.ts
+++ b/__fixtures__/misc/output-proto-amino/amino-msg-with-func/misc/eval_request.ts
@@ -123,7 +123,7 @@ export interface EvalRequest {
   opt: FeatureSet_Utf8Validation;
   graph?: TestNest_Graph;
   /** deprecated option */
-  deprecated: string;
+  deprecated?: string;
 }
 export interface EvalRequestProtoMsg {
   typeUrl: "/misc.EvalRequest";
@@ -173,7 +173,7 @@ export interface EvalRequestSDKType {
   test_array: string[];
   opt: FeatureSet_Utf8Validation;
   graph?: TestNest_GraphSDKType;
-  deprecated: string;
+  deprecated?: string;
 }
 export interface AccessConfig {
   sender: string;
@@ -424,7 +424,7 @@ function createBaseEvalRequest(): EvalRequest {
     testArray: [],
     opt: -2,
     graph: undefined,
-    deprecated: ""
+    deprecated: undefined
   };
 }
 export const EvalRequest = {
@@ -469,7 +469,7 @@ export const EvalRequest = {
     if (message.graph !== undefined) {
       TestNest_Graph.encode(message.graph, writer.uint32(130).fork()).ldelim();
     }
-    if (message.deprecated !== "") {
+    if (message.deprecated !== undefined) {
       writer.uint32(138).string(message.deprecated);
     }
     return writer;
@@ -617,7 +617,7 @@ export const EvalRequest = {
     if (object.graph !== undefined && object.graph !== null) {
       message.graph = TestNest_Graph.fromPartial(object.graph);
     }
-    message.deprecated = object.deprecated ?? "";
+    message.deprecated = object.deprecated ?? undefined;
     return message;
   },
   fromSDK(object: EvalRequestSDKType): EvalRequest {
@@ -669,7 +669,7 @@ export const EvalRequest = {
       test_array: Array.isArray(object?.test_array) ? object.test_array.map((e: any) => String(e)) : [],
       opt: isSet(object.opt) ? featureSet_Utf8ValidationFromJSON(object.opt) : -1,
       graph: isSet(object.graph) ? TestNest_Graph.fromSDKJSON(object.graph) : undefined,
-      deprecated: isSet(object.deprecated) ? String(object.deprecated) : ""
+      deprecated: isSet(object.deprecated) ? String(object.deprecated) : undefined
     };
   },
   toSDK(message: EvalRequest): EvalRequestSDKType {
@@ -777,7 +777,7 @@ export const EvalRequest = {
     }
     obj.opt = message.opt ?? -2;
     obj.graph = message.graph ? TestNest_Graph.toAmino(message.graph) : undefined;
-    obj.deprecated = message.deprecated === "" ? undefined : message.deprecated;
+    obj.deprecated = message.deprecated === null ? undefined : message.deprecated;
     return obj;
   },
   fromAminoMsg(object: EvalRequestAminoMsg): EvalRequest {
diff --git a/__fixtures__/misc/output-proto-amino/amino-no-msg-with-func/misc/eval_request.ts b/__fixtures__/misc/output-proto-amino/amino-no-msg-with-func/misc/eval_request.ts
index 6dff6f2c2..c66a66d7e 100644
--- a/__fixtures__/misc/output-proto-amino/amino-no-msg-with-func/misc/eval_request.ts
+++ b/__fixtures__/misc/output-proto-amino/amino-no-msg-with-func/misc/eval_request.ts
@@ -115,7 +115,7 @@ export interface EvalRequest {
   opt: FeatureSet_Utf8Validation;
   graph?: TestNest_Graph;
   /** deprecated option */
-  deprecated: string;
+  deprecated?: string;
 }
 export interface EvalRequestProtoMsg {
   typeUrl: "/misc.EvalRequest";
@@ -161,7 +161,7 @@ export interface EvalRequestSDKType {
   test_array: string[];
   opt: FeatureSet_Utf8Validation;
   graph?: TestNest_GraphSDKType;
-  deprecated: string;
+  deprecated?: string;
 }
 export interface AccessConfig {
   sender: string;
@@ -398,7 +398,7 @@ function createBaseEvalRequest(): EvalRequest {
     testArray: [],
     opt: 0,
     graph: undefined,
-    deprecated: ""
+    deprecated: undefined
   };
 }
 export const EvalRequest = {
@@ -443,7 +443,7 @@ export const EvalRequest = {
     if (message.graph !== undefined) {
       TestNest_Graph.encode(message.graph, writer.uint32(130).fork()).ldelim();
     }
-    if (message.deprecated !== "") {
+    if (message.deprecated !== undefined) {
       writer.uint32(138).string(message.deprecated);
     }
     return writer;
@@ -591,7 +591,7 @@ export const EvalRequest = {
     if (object.graph !== undefined && object.graph !== null) {
       message.graph = TestNest_Graph.fromPartial(object.graph);
     }
-    message.deprecated = object.deprecated ?? "";
+    message.deprecated = object.deprecated ?? undefined;
     return message;
   },
   fromSDK(object: EvalRequestSDKType): EvalRequest {
@@ -643,7 +643,7 @@ export const EvalRequest = {
       test_array: Array.isArray(object?.test_array) ? object.test_array.map((e: any) => String(e)) : [],
       opt: isSet(object.opt) ? featureSet_Utf8ValidationFromJSON(object.opt) : -1,
       graph: isSet(object.graph) ? TestNest_Graph.fromSDKJSON(object.graph) : undefined,
-      deprecated: isSet(object.deprecated) ? String(object.deprecated) : ""
+      deprecated: isSet(object.deprecated) ? String(object.deprecated) : undefined
     };
   },
   toSDK(message: EvalRequest): EvalRequestSDKType {
@@ -751,7 +751,7 @@ export const EvalRequest = {
     }
     obj.opt = message.opt ?? 0;
     obj.graph = message.graph ? TestNest_Graph.toAmino(message.graph) : undefined;
-    obj.deprecated = message.deprecated === "" ? undefined : message.deprecated;
+    obj.deprecated = message.deprecated === null ? undefined : message.deprecated;
     return obj;
   },
   fromProtoMsg(message: EvalRequestProtoMsg): EvalRequest {
diff --git a/__fixtures__/misc/output-proto-amino/no-amino-legacy-no-proto/misc/eval_request.ts b/__fixtures__/misc/output-proto-amino/no-amino-legacy-no-proto/misc/eval_request.ts
index b67de10f1..25ffcc212 100644
--- a/__fixtures__/misc/output-proto-amino/no-amino-legacy-no-proto/misc/eval_request.ts
+++ b/__fixtures__/misc/output-proto-amino/no-amino-legacy-no-proto/misc/eval_request.ts
@@ -98,7 +98,7 @@ export interface EvalRequest {
   opt: FeatureSet_Utf8Validation;
   graph?: TestNest_Graph;
   /** deprecated option */
-  deprecated: string;
+  deprecated?: string;
 }
 export interface EvalRequestSDKType {
   bindings: {
@@ -116,7 +116,7 @@ export interface EvalRequestSDKType {
   test_array: string[];
   opt: FeatureSet_Utf8Validation;
   graph?: TestNest_GraphSDKType;
-  deprecated: string;
+  deprecated?: string;
 }
 export interface AccessConfig {
   sender: string;
@@ -294,7 +294,7 @@ function createBaseEvalRequest(): EvalRequest {
     testArray: [],
     opt: 0,
     graph: undefined,
-    deprecated: ""
+    deprecated: undefined
   };
 }
 export const EvalRequest = {
@@ -339,7 +339,7 @@ export const EvalRequest = {
     if (message.graph !== undefined) {
       TestNest_Graph.encode(message.graph, writer.uint32(130).fork()).ldelim();
     }
-    if (message.deprecated !== "") {
+    if (message.deprecated !== undefined) {
       writer.uint32(138).string(message.deprecated);
     }
     return writer;
@@ -487,7 +487,7 @@ export const EvalRequest = {
     if (object.graph !== undefined && object.graph !== null) {
       message.graph = TestNest_Graph.fromPartial(object.graph);
     }
-    message.deprecated = object.deprecated ?? "";
+    message.deprecated = object.deprecated ?? undefined;
     return message;
   },
   fromSDK(object: EvalRequestSDKType): EvalRequest {
@@ -539,7 +539,7 @@ export const EvalRequest = {
       test_array: Array.isArray(object?.test_array) ? object.test_array.map((e: any) => String(e)) : [],
       opt: isSet(object.opt) ? featureSet_Utf8ValidationFromJSON(object.opt) : -1,
       graph: isSet(object.graph) ? TestNest_Graph.fromSDKJSON(object.graph) : undefined,
-      deprecated: isSet(object.deprecated) ? String(object.deprecated) : ""
+      deprecated: isSet(object.deprecated) ? String(object.deprecated) : undefined
     };
   },
   toSDK(message: EvalRequest): EvalRequestSDKType {
diff --git a/__fixtures__/misc/output-proto-amino/no-amino-legacy/misc/eval_request.ts b/__fixtures__/misc/output-proto-amino/no-amino-legacy/misc/eval_request.ts
index 842859c8c..6f53d88c6 100644
--- a/__fixtures__/misc/output-proto-amino/no-amino-legacy/misc/eval_request.ts
+++ b/__fixtures__/misc/output-proto-amino/no-amino-legacy/misc/eval_request.ts
@@ -106,7 +106,7 @@ export interface EvalRequest {
   opt: FeatureSet_Utf8Validation;
   graph?: TestNest_Graph;
   /** deprecated option */
-  deprecated: string;
+  deprecated?: string;
 }
 export interface EvalRequestProtoMsg {
   typeUrl: "/misc.EvalRequest";
@@ -128,7 +128,7 @@ export interface EvalRequestSDKType {
   test_array: string[];
   opt: FeatureSet_Utf8Validation;
   graph?: TestNest_GraphSDKType;
-  deprecated: string;
+  deprecated?: string;
 }
 export interface AccessConfig {
   sender: string;
@@ -364,7 +364,7 @@ function createBaseEvalRequest(): EvalRequest {
     testArray: [],
     opt: 0,
     graph: undefined,
-    deprecated: ""
+    deprecated: undefined
   };
 }
 export const EvalRequest = {
@@ -409,7 +409,7 @@ export const EvalRequest = {
     if (message.graph !== undefined) {
       TestNest_Graph.encode(message.graph, writer.uint32(130).fork()).ldelim();
     }
-    if (message.deprecated !== "") {
+    if (message.deprecated !== undefined) {
       writer.uint32(138).string(message.deprecated);
     }
     return writer;
@@ -557,7 +557,7 @@ export const EvalRequest = {
     if (object.graph !== undefined && object.graph !== null) {
       message.graph = TestNest_Graph.fromPartial(object.graph);
     }
-    message.deprecated = object.deprecated ?? "";
+    message.deprecated = object.deprecated ?? undefined;
     return message;
   },
   fromSDK(object: EvalRequestSDKType): EvalRequest {
@@ -609,7 +609,7 @@ export const EvalRequest = {
       test_array: Array.isArray(object?.test_array) ? object.test_array.map((e: any) => String(e)) : [],
       opt: isSet(object.opt) ? featureSet_Utf8ValidationFromJSON(object.opt) : -1,
       graph: isSet(object.graph) ? TestNest_Graph.fromSDKJSON(object.graph) : undefined,
-      deprecated: isSet(object.deprecated) ? String(object.deprecated) : ""
+      deprecated: isSet(object.deprecated) ? String(object.deprecated) : undefined
     };
   },
   toSDK(message: EvalRequest): EvalRequestSDKType {
@@ -717,7 +717,7 @@ export const EvalRequest = {
     }
     obj.opt = message.opt ?? 0;
     obj.graph = message.graph ? TestNest_Graph.toAmino(message.graph) : undefined;
-    obj.deprecated = message.deprecated === "" ? undefined : message.deprecated;
+    obj.deprecated = message.deprecated === null ? undefined : message.deprecated;
     return obj;
   },
   fromAminoMsg(object: EvalRequestAminoMsg): EvalRequest {
diff --git a/__fixtures__/misc/output-proto-amino/no-amino-no-proto/misc/eval_request.ts b/__fixtures__/misc/output-proto-amino/no-amino-no-proto/misc/eval_request.ts
index b67de10f1..25ffcc212 100644
--- a/__fixtures__/misc/output-proto-amino/no-amino-no-proto/misc/eval_request.ts
+++ b/__fixtures__/misc/output-proto-amino/no-amino-no-proto/misc/eval_request.ts
@@ -98,7 +98,7 @@ export interface EvalRequest {
   opt: FeatureSet_Utf8Validation;
   graph?: TestNest_Graph;
   /** deprecated option */
-  deprecated: string;
+  deprecated?: string;
 }
 export interface EvalRequestSDKType {
   bindings: {
@@ -116,7 +116,7 @@ export interface EvalRequestSDKType {
   test_array: string[];
   opt: FeatureSet_Utf8Validation;
   graph?: TestNest_GraphSDKType;
-  deprecated: string;
+  deprecated?: string;
 }
 export interface AccessConfig {
   sender: string;
@@ -294,7 +294,7 @@ function createBaseEvalRequest(): EvalRequest {
     testArray: [],
     opt: 0,
     graph: undefined,
-    deprecated: ""
+    deprecated: undefined
   };
 }
 export const EvalRequest = {
@@ -339,7 +339,7 @@ export const EvalRequest = {
     if (message.graph !== undefined) {
       TestNest_Graph.encode(message.graph, writer.uint32(130).fork()).ldelim();
     }
-    if (message.deprecated !== "") {
+    if (message.deprecated !== undefined) {
       writer.uint32(138).string(message.deprecated);
     }
     return writer;
@@ -487,7 +487,7 @@ export const EvalRequest = {
     if (object.graph !== undefined && object.graph !== null) {
       message.graph = TestNest_Graph.fromPartial(object.graph);
     }
-    message.deprecated = object.deprecated ?? "";
+    message.deprecated = object.deprecated ?? undefined;
     return message;
   },
   fromSDK(object: EvalRequestSDKType): EvalRequest {
@@ -539,7 +539,7 @@ export const EvalRequest = {
       test_array: Array.isArray(object?.test_array) ? object.test_array.map((e: any) => String(e)) : [],
       opt: isSet(object.opt) ? featureSet_Utf8ValidationFromJSON(object.opt) : -1,
       graph: isSet(object.graph) ? TestNest_Graph.fromSDKJSON(object.graph) : undefined,
-      deprecated: isSet(object.deprecated) ? String(object.deprecated) : ""
+      deprecated: isSet(object.deprecated) ? String(object.deprecated) : undefined
     };
   },
   toSDK(message: EvalRequest): EvalRequestSDKType {
diff --git a/__fixtures__/misc/output-proto-amino/no-amino/misc/eval_request.ts b/__fixtures__/misc/output-proto-amino/no-amino/misc/eval_request.ts
index 842859c8c..6f53d88c6 100644
--- a/__fixtures__/misc/output-proto-amino/no-amino/misc/eval_request.ts
+++ b/__fixtures__/misc/output-proto-amino/no-amino/misc/eval_request.ts
@@ -106,7 +106,7 @@ export interface EvalRequest {
   opt: FeatureSet_Utf8Validation;
   graph?: TestNest_Graph;
   /** deprecated option */
-  deprecated: string;
+  deprecated?: string;
 }
 export interface EvalRequestProtoMsg {
   typeUrl: "/misc.EvalRequest";
@@ -128,7 +128,7 @@ export interface EvalRequestSDKType {
   test_array: string[];
   opt: FeatureSet_Utf8Validation;
   graph?: TestNest_GraphSDKType;
-  deprecated: string;
+  deprecated?: string;
 }
 export interface AccessConfig {
   sender: string;
@@ -364,7 +364,7 @@ function createBaseEvalRequest(): EvalRequest {
     testArray: [],
     opt: 0,
     graph: undefined,
-    deprecated: ""
+    deprecated: undefined
   };
 }
 export const EvalRequest = {
@@ -409,7 +409,7 @@ export const EvalRequest = {
     if (message.graph !== undefined) {
       TestNest_Graph.encode(message.graph, writer.uint32(130).fork()).ldelim();
     }
-    if (message.deprecated !== "") {
+    if (message.deprecated !== undefined) {
       writer.uint32(138).string(message.deprecated);
     }
     return writer;
@@ -557,7 +557,7 @@ export const EvalRequest = {
     if (object.graph !== undefined && object.graph !== null) {
       message.graph = TestNest_Graph.fromPartial(object.graph);
     }
-    message.deprecated = object.deprecated ?? "";
+    message.deprecated = object.deprecated ?? undefined;
     return message;
   },
   fromSDK(object: EvalRequestSDKType): EvalRequest {
@@ -609,7 +609,7 @@ export const EvalRequest = {
       test_array: Array.isArray(object?.test_array) ? object.test_array.map((e: any) => String(e)) : [],
       opt: isSet(object.opt) ? featureSet_Utf8ValidationFromJSON(object.opt) : -1,
       graph: isSet(object.graph) ? TestNest_Graph.fromSDKJSON(object.graph) : undefined,
-      deprecated: isSet(object.deprecated) ? String(object.deprecated) : ""
+      deprecated: isSet(object.deprecated) ? String(object.deprecated) : undefined
     };
   },
   toSDK(message: EvalRequest): EvalRequestSDKType {
@@ -717,7 +717,7 @@ export const EvalRequest = {
     }
     obj.opt = message.opt ?? 0;
     obj.graph = message.graph ? TestNest_Graph.toAmino(message.graph) : undefined;
-    obj.deprecated = message.deprecated === "" ? undefined : message.deprecated;
+    obj.deprecated = message.deprecated === null ? undefined : message.deprecated;
     return obj;
   },
   fromAminoMsg(object: EvalRequestAminoMsg): EvalRequest {
diff --git a/__fixtures__/misc/output-proto-amino/proto-only-legacy/misc/eval_request.ts b/__fixtures__/misc/output-proto-amino/proto-only-legacy/misc/eval_request.ts
index aae9bbf0e..f736b6f53 100644
--- a/__fixtures__/misc/output-proto-amino/proto-only-legacy/misc/eval_request.ts
+++ b/__fixtures__/misc/output-proto-amino/proto-only-legacy/misc/eval_request.ts
@@ -106,7 +106,7 @@ export interface EvalRequest {
   opt: FeatureSet_Utf8Validation;
   graph?: TestNest_Graph;
   /** deprecated option */
-  deprecated: string;
+  deprecated?: string;
 }
 export interface EvalRequestProtoMsg {
   typeUrl: "/misc.EvalRequest";
@@ -128,7 +128,7 @@ export interface EvalRequestSDKType {
   test_array: string[];
   opt: FeatureSet_Utf8Validation;
   graph?: TestNest_GraphSDKType;
-  deprecated: string;
+  deprecated?: string;
 }
 export interface AccessConfig {
   sender: string;
@@ -326,7 +326,7 @@ function createBaseEvalRequest(): EvalRequest {
     testArray: [],
     opt: 0,
     graph: undefined,
-    deprecated: ""
+    deprecated: undefined
   };
 }
 export const EvalRequest = {
@@ -371,7 +371,7 @@ export const EvalRequest = {
     if (message.graph !== undefined) {
       TestNest_Graph.encode(message.graph, writer.uint32(130).fork()).ldelim();
     }
-    if (message.deprecated !== "") {
+    if (message.deprecated !== undefined) {
       writer.uint32(138).string(message.deprecated);
     }
     return writer;
@@ -519,7 +519,7 @@ export const EvalRequest = {
     if (object.graph !== undefined && object.graph !== null) {
       message.graph = TestNest_Graph.fromPartial(object.graph);
     }
-    message.deprecated = object.deprecated ?? "";
+    message.deprecated = object.deprecated ?? undefined;
     return message;
   },
   fromSDK(object: EvalRequestSDKType): EvalRequest {
@@ -571,7 +571,7 @@ export const EvalRequest = {
       test_array: Array.isArray(object?.test_array) ? object.test_array.map((e: any) => String(e)) : [],
       opt: isSet(object.opt) ? featureSet_Utf8ValidationFromJSON(object.opt) : -1,
       graph: isSet(object.graph) ? TestNest_Graph.fromSDKJSON(object.graph) : undefined,
-      deprecated: isSet(object.deprecated) ? String(object.deprecated) : ""
+      deprecated: isSet(object.deprecated) ? String(object.deprecated) : undefined
     };
   },
   toSDK(message: EvalRequest): EvalRequestSDKType {
diff --git a/__fixtures__/misc/output-proto-amino/proto-only/misc/eval_request.ts b/__fixtures__/misc/output-proto-amino/proto-only/misc/eval_request.ts
index aae9bbf0e..f736b6f53 100644
--- a/__fixtures__/misc/output-proto-amino/proto-only/misc/eval_request.ts
+++ b/__fixtures__/misc/output-proto-amino/proto-only/misc/eval_request.ts
@@ -106,7 +106,7 @@ export interface EvalRequest {
   opt: FeatureSet_Utf8Validation;
   graph?: TestNest_Graph;
   /** deprecated option */
-  deprecated: string;
+  deprecated?: string;
 }
 export interface EvalRequestProtoMsg {
   typeUrl: "/misc.EvalRequest";
@@ -128,7 +128,7 @@ export interface EvalRequestSDKType {
   test_array: string[];
   opt: FeatureSet_Utf8Validation;
   graph?: TestNest_GraphSDKType;
-  deprecated: string;
+  deprecated?: string;
 }
 export interface AccessConfig {
   sender: string;
@@ -326,7 +326,7 @@ function createBaseEvalRequest(): EvalRequest {
     testArray: [],
     opt: 0,
     graph: undefined,
-    deprecated: ""
+    deprecated: undefined
   };
 }
 export const EvalRequest = {
@@ -371,7 +371,7 @@ export const EvalRequest = {
     if (message.graph !== undefined) {
       TestNest_Graph.encode(message.graph, writer.uint32(130).fork()).ldelim();
     }
-    if (message.deprecated !== "") {
+    if (message.deprecated !== undefined) {
       writer.uint32(138).string(message.deprecated);
     }
     return writer;
@@ -519,7 +519,7 @@ export const EvalRequest = {
     if (object.graph !== undefined && object.graph !== null) {
       message.graph = TestNest_Graph.fromPartial(object.graph);
     }
-    message.deprecated = object.deprecated ?? "";
+    message.deprecated = object.deprecated ?? undefined;
     return message;
   },
   fromSDK(object: EvalRequestSDKType): EvalRequest {
@@ -571,7 +571,7 @@ export const EvalRequest = {
       test_array: Array.isArray(object?.test_array) ? object.test_array.map((e: any) => String(e)) : [],
       opt: isSet(object.opt) ? featureSet_Utf8ValidationFromJSON(object.opt) : -1,
       graph: isSet(object.graph) ? TestNest_Graph.fromSDKJSON(object.graph) : undefined,
-      deprecated: isSet(object.deprecated) ? String(object.deprecated) : ""
+      deprecated: isSet(object.deprecated) ? String(object.deprecated) : undefined
     };
   },
   toSDK(message: EvalRequest): EvalRequestSDKType {
diff --git a/__fixtures__/misc/output/misc/eval_request.ts b/__fixtures__/misc/output/misc/eval_request.ts
index 881c09e02..711589138 100644
--- a/__fixtures__/misc/output/misc/eval_request.ts
+++ b/__fixtures__/misc/output/misc/eval_request.ts
@@ -123,7 +123,7 @@ export interface EvalRequest {
   opt: FeatureSet_Utf8Validation;
   graph?: TestNest_Graph;
   /** deprecated option */
-  deprecated: string;
+  deprecated?: string;
 }
 export interface EvalRequestProtoMsg {
   typeUrl: "/misc.EvalRequest";
@@ -173,7 +173,7 @@ export interface EvalRequestSDKType {
   test_array: string[];
   opt: FeatureSet_Utf8Validation;
   graph?: TestNest_GraphSDKType;
-  deprecated: string;
+  deprecated?: string;
 }
 export interface AccessConfig {
   sender: string;
@@ -424,7 +424,7 @@ function createBaseEvalRequest(): EvalRequest {
     testArray: [],
     opt: 0,
     graph: undefined,
-    deprecated: ""
+    deprecated: undefined
   };
 }
 export const EvalRequest = {
@@ -469,7 +469,7 @@ export const EvalRequest = {
     if (message.graph !== undefined) {
       TestNest_Graph.encode(message.graph, writer.uint32(130).fork()).ldelim();
     }
-    if (message.deprecated !== "") {
+    if (message.deprecated !== undefined) {
       writer.uint32(138).string(message.deprecated);
     }
     return writer;
@@ -617,7 +617,7 @@ export const EvalRequest = {
     if (object.graph !== undefined && object.graph !== null) {
       message.graph = TestNest_Graph.fromPartial(object.graph);
     }
-    message.deprecated = object.deprecated ?? "";
+    message.deprecated = object.deprecated ?? undefined;
     return message;
   },
   fromSDK(object: EvalRequestSDKType): EvalRequest {
@@ -669,7 +669,7 @@ export const EvalRequest = {
       test_array: Array.isArray(object?.test_array) ? object.test_array.map((e: any) => String(e)) : [],
       opt: isSet(object.opt) ? featureSet_Utf8ValidationFromJSON(object.opt) : -1,
       graph: isSet(object.graph) ? TestNest_Graph.fromSDKJSON(object.graph) : undefined,
-      deprecated: isSet(object.deprecated) ? String(object.deprecated) : ""
+      deprecated: isSet(object.deprecated) ? String(object.deprecated) : undefined
     };
   },
   toSDK(message: EvalRequest): EvalRequestSDKType {
@@ -777,7 +777,7 @@ export const EvalRequest = {
     }
     obj.opt = message.opt ?? 0;
     obj.graph = message.graph ? TestNest_Graph.toAmino(message.graph) : undefined;
-    obj.deprecated = message.deprecated === "" ? undefined : message.deprecated;
+    obj.deprecated = message.deprecated === null ? undefined : message.deprecated;
     return obj;
   },
   fromAminoMsg(object: EvalRequestAminoMsg): EvalRequest {
diff --git a/packages/ast/src/encoding/__tests__/__snapshots__/misc.overall.test.ts.snap b/packages/ast/src/encoding/__tests__/__snapshots__/misc.overall.test.ts.snap
index 3eaf921d9..d328866cf 100644
--- a/packages/ast/src/encoding/__tests__/__snapshots__/misc.overall.test.ts.snap
+++ b/packages/ast/src/encoding/__tests__/__snapshots__/misc.overall.test.ts.snap
@@ -4,13 +4,13 @@ exports[`misc/eval_request date 1`] = `
 "export const EvalRequest = {
   typeUrl: "/misc.EvalRequest",
   is(o: any): o is EvalRequest {
-    return o && (o.$typeUrl === EvalRequest.typeUrl || isSet(o.bindings) && isSet(o.refs) && typeof o.testNum === "number" && typeof o.testString === "string" && typeof o.testBool === "boolean" && Array.isArray(o.testArray) && (!o.testArray.length || typeof o.testArray[0] === "string") && isSet(o.opt) && typeof o.deprecated === "string");
+    return o && (o.$typeUrl === EvalRequest.typeUrl || isSet(o.bindings) && isSet(o.refs) && typeof o.testNum === "number" && typeof o.testString === "string" && typeof o.testBool === "boolean" && Array.isArray(o.testArray) && (!o.testArray.length || typeof o.testArray[0] === "string") && isSet(o.opt));
   },
   isSDK(o: any): o is EvalRequestSDKType {
-    return o && (o.$typeUrl === EvalRequest.typeUrl || isSet(o.bindings) && isSet(o.refs) && typeof o.test_num === "number" && typeof o.test_string === "string" && typeof o.test_bool === "boolean" && Array.isArray(o.test_array) && (!o.test_array.length || typeof o.test_array[0] === "string") && isSet(o.opt) && typeof o.deprecated === "string");
+    return o && (o.$typeUrl === EvalRequest.typeUrl || isSet(o.bindings) && isSet(o.refs) && typeof o.test_num === "number" && typeof o.test_string === "string" && typeof o.test_bool === "boolean" && Array.isArray(o.test_array) && (!o.test_array.length || typeof o.test_array[0] === "string") && isSet(o.opt));
   },
   isAmino(o: any): o is EvalRequestAmino {
-    return o && (o.$typeUrl === EvalRequest.typeUrl || isSet(o.bindings) && isSet(o.refs) && typeof o.test_num === "number" && typeof o.test_string === "string" && typeof o.test_bool === "boolean" && Array.isArray(o.test_array) && (!o.test_array.length || typeof o.test_array[0] === "string") && isSet(o.opt) && typeof o.deprecated === "string");
+    return o && (o.$typeUrl === EvalRequest.typeUrl || isSet(o.bindings) && isSet(o.refs) && typeof o.test_num === "number" && typeof o.test_string === "string" && typeof o.test_bool === "boolean" && Array.isArray(o.test_array) && (!o.test_array.length || typeof o.test_array[0] === "string") && isSet(o.opt));
   },
   encode(message: EvalRequest, writer: BinaryWriter = BinaryWriter.create()): BinaryWriter {
     Object.entries(message.bindings).forEach(([key, value]) => {
@@ -52,7 +52,7 @@ exports[`misc/eval_request date 1`] = `
     if (message.graph !== undefined) {
       TestNest_Graph.encode(message.graph, writer.uint32(130).fork()).ldelim();
     }
-    if (message.deprecated !== "") {
+    if (message.deprecated !== undefined) {
       writer.uint32(138).string(message.deprecated);
     }
     return writer;
@@ -136,7 +136,7 @@ exports[`misc/eval_request date 1`] = `
       testArray: Array.isArray(object?.testArray) ? object.testArray.map((e: any) => String(e)) : [],
       opt: isSet(object.opt) ? featureSet_Utf8ValidationFromJSON(object.opt) : -1,
       graph: isSet(object.graph) ? TestNest_Graph.fromJSON(object.graph) : undefined,
-      deprecated: isSet(object.deprecated) ? String(object.deprecated) : ""
+      deprecated: isSet(object.deprecated) ? String(object.deprecated) : undefined
     };
   },
   toJSON(message: EvalRequest): JsonSafe<EvalRequest> {
@@ -196,7 +196,7 @@ exports[`misc/eval_request date 1`] = `
     message.testArray = object.testArray?.map(e => e) || [];
     message.opt = object.opt ?? 0;
     message.graph = object.graph !== undefined && object.graph !== null ? TestNest_Graph.fromPartial(object.graph) : undefined;
-    message.deprecated = object.deprecated ?? "";
+    message.deprecated = object.deprecated ?? undefined;
     return message;
   },
   fromSDK(object: EvalRequestSDKType): EvalRequest {
@@ -330,7 +330,7 @@ exports[`misc/eval_request date 1`] = `
     }
     obj.opt = message.opt ?? 0;
     obj.graph = message.graph ? TestNest_Graph.toAmino(message.graph) : undefined;
-    obj.deprecated = message.deprecated === "" ? undefined : message.deprecated;
+    obj.deprecated = message.deprecated === null ? undefined : message.deprecated;
     return obj;
   },
   fromAminoMsg(object: EvalRequestAminoMsg): EvalRequest {
@@ -355,13 +355,13 @@ exports[`misc/eval_request timestamp 1`] = `
 "export const EvalRequest = {
   typeUrl: "/misc.EvalRequest",
   is(o: any): o is EvalRequest {
-    return o && (o.$typeUrl === EvalRequest.typeUrl || isSet(o.bindings) && isSet(o.refs) && typeof o.testNum === "number" && typeof o.testString === "string" && typeof o.testBool === "boolean" && Array.isArray(o.testArray) && (!o.testArray.length || typeof o.testArray[0] === "string") && isSet(o.opt) && typeof o.deprecated === "string");
+    return o && (o.$typeUrl === EvalRequest.typeUrl || isSet(o.bindings) && isSet(o.refs) && typeof o.testNum === "number" && typeof o.testString === "string" && typeof o.testBool === "boolean" && Array.isArray(o.testArray) && (!o.testArray.length || typeof o.testArray[0] === "string") && isSet(o.opt));
   },
   isSDK(o: any): o is EvalRequestSDKType {
-    return o && (o.$typeUrl === EvalRequest.typeUrl || isSet(o.bindings) && isSet(o.refs) && typeof o.test_num === "number" && typeof o.test_string === "string" && typeof o.test_bool === "boolean" && Array.isArray(o.test_array) && (!o.test_array.length || typeof o.test_array[0] === "string") && isSet(o.opt) && typeof o.deprecated === "string");
+    return o && (o.$typeUrl === EvalRequest.typeUrl || isSet(o.bindings) && isSet(o.refs) && typeof o.test_num === "number" && typeof o.test_string === "string" && typeof o.test_bool === "boolean" && Array.isArray(o.test_array) && (!o.test_array.length || typeof o.test_array[0] === "string") && isSet(o.opt));
   },
   isAmino(o: any): o is EvalRequestAmino {
-    return o && (o.$typeUrl === EvalRequest.typeUrl || isSet(o.bindings) && isSet(o.refs) && typeof o.test_num === "number" && typeof o.test_string === "string" && typeof o.test_bool === "boolean" && Array.isArray(o.test_array) && (!o.test_array.length || typeof o.test_array[0] === "string") && isSet(o.opt) && typeof o.deprecated === "string");
+    return o && (o.$typeUrl === EvalRequest.typeUrl || isSet(o.bindings) && isSet(o.refs) && typeof o.test_num === "number" && typeof o.test_string === "string" && typeof o.test_bool === "boolean" && Array.isArray(o.test_array) && (!o.test_array.length || typeof o.test_array[0] === "string") && isSet(o.opt));
   },
   encode(message: EvalRequest, writer: BinaryWriter = BinaryWriter.create()): BinaryWriter {
     Object.entries(message.bindings).forEach(([key, value]) => {
@@ -403,7 +403,7 @@ exports[`misc/eval_request timestamp 1`] = `
     if (message.graph !== undefined) {
       TestNest_Graph.encode(message.graph, writer.uint32(130).fork()).ldelim();
     }
-    if (message.deprecated !== "") {
+    if (message.deprecated !== undefined) {
       writer.uint32(138).string(message.deprecated);
     }
     return writer;
@@ -487,7 +487,7 @@ exports[`misc/eval_request timestamp 1`] = `
       testArray: Array.isArray(object?.testArray) ? object.testArray.map((e: any) => String(e)) : [],
       opt: isSet(object.opt) ? featureSet_Utf8ValidationFromJSON(object.opt) : -1,
       graph: isSet(object.graph) ? TestNest_Graph.fromJSON(object.graph) : undefined,
-      deprecated: isSet(object.deprecated) ? String(object.deprecated) : ""
+      deprecated: isSet(object.deprecated) ? String(object.deprecated) : undefined
     };
   },
   toJSON(message: EvalRequest): JsonSafe<EvalRequest> {
@@ -547,7 +547,7 @@ exports[`misc/eval_request timestamp 1`] = `
     message.testArray = object.testArray?.map(e => e) || [];
     message.opt = object.opt ?? 0;
     message.graph = object.graph !== undefined && object.graph !== null ? TestNest_Graph.fromPartial(object.graph) : undefined;
-    message.deprecated = object.deprecated ?? "";
+    message.deprecated = object.deprecated ?? undefined;
     return message;
   },
   fromSDK(object: EvalRequestSDKType): EvalRequest {
@@ -681,7 +681,7 @@ exports[`misc/eval_request timestamp 1`] = `
     }
     obj.opt = message.opt ?? 0;
     obj.graph = message.graph ? TestNest_Graph.toAmino(message.graph) : undefined;
-    obj.deprecated = message.deprecated === "" ? undefined : message.deprecated;
+    obj.deprecated = message.deprecated === null ? undefined : message.deprecated;
     return obj;
   },
   fromAminoMsg(object: EvalRequestAminoMsg): EvalRequest {
diff --git a/packages/ast/src/encoding/proto/__snapshots__/proto.type.spec.ts.snap b/packages/ast/src/encoding/proto/__snapshots__/proto.type.spec.ts.snap
index da90a6afb..eeb850df7 100644
--- a/packages/ast/src/encoding/proto/__snapshots__/proto.type.spec.ts.snap
+++ b/packages/ast/src/encoding/proto/__snapshots__/proto.type.spec.ts.snap
@@ -280,7 +280,7 @@ exports[`traversed misc/eval_request SDKType 1`] = `
   test_array: string[];
   opt: FeatureSet_Utf8Validation;
   graph?: TestNest_GraphSDKType;
-  deprecated: string;
+  deprecated?: string;
 }"
 `;
 
diff --git a/packages/ast/src/encoding/proto/types.ts b/packages/ast/src/encoding/proto/types.ts
index 187ccaa32..aa4d1f6a6 100644
--- a/packages/ast/src/encoding/proto/types.ts
+++ b/packages/ast/src/encoding/proto/types.ts
@@ -170,8 +170,8 @@ export const getFieldOptionality = (
 ) => {
     const isScalarDefaultToNullable = context.pluginValue('prototypes.isScalarDefaultToNullable');
 
-    if(field?.options?.['(gogoproto.moretags)'] && getOptionDeprecated(field?.options?.['(gogoproto.moretags)']) === 'false'){
-        return false
+    if(field?.options?.['(gogoproto.moretags)'] && getOptionDeprecated(field?.options?.['(gogoproto.moretags)']) === 'true'){
+        return true
     }
 
     if (isArrayField(field) || isEnumField(field) || (!isScalarDefaultToNullable && isScalarField(field))) {
@@ -191,9 +191,8 @@ export const getFieldOptionalityForAmino = (
   isOneOf: boolean
 ) => {
     const useProtoOptionality = context.pluginValue('aminoEncoding.useProtoOptionality');
-
-    if(field?.options?.['(gogoproto.moretags)'] && getOptionDeprecated(field?.options?.['(gogoproto.moretags)']) === 'false'){
-        return false
+    if(field?.options?.['(gogoproto.moretags)'] && getOptionDeprecated(field?.options?.['(gogoproto.moretags)']) === 'true'){
+        return true
     }
 
     if(useProtoOptionality){
@@ -240,8 +239,8 @@ export const getFieldOptionalityForDefaults = (
     const useOptionalNullable = context.pluginValue('prototypes.useOptionalNullable');
     const isScalarDefaultToNullable = !field?.options?.['(gogoproto.nullable)'] && context.pluginValue('prototypes.isScalarDefaultToNullable');
 
-    if(field?.options?.['(gogoproto.moretags)'] && getOptionDeprecated(field?.options?.['(gogoproto.moretags)']) === 'false'){
-        return false
+    if(field?.options?.['(gogoproto.moretags)'] && getOptionDeprecated(field?.options?.['(gogoproto.moretags)']) === 'true'){
+        return true
     }
 
     if (isArrayField(field) || isEnumField(field) || !isScalarDefaultToNullable && isScalarField(field) || isMapField(field)) {
@@ -277,7 +276,7 @@ export const getFieldOptionalityForDefaults = (
 */
 export const getOptionDeprecated = (input: string) =>{
     // Regular expression to match deprecated value with optional spaces
-    const deprecatedRegex = /deprecated:\s*"(true|false)"/;
+    const deprecatedRegex = /\s*deprecated:\s*(true|false)\s*/;
 
     // Extract the deprecated value
     const match = input.match(deprecatedRegex);