diff --git a/docs/docs/get-started/quickstart/openapi.mdx b/docs/docs/get-started/quickstart/openapi.mdx
index b81f2c178..4977675f6 100644
--- a/docs/docs/get-started/quickstart/openapi.mdx
+++ b/docs/docs/get-started/quickstart/openapi.mdx
@@ -306,6 +306,16 @@ try {
 </Tab>
 
 <Tab title="Rust">
+
+<Tip>
+  If you're using `cargo watch -- cargo build` and seeing build failures because it can't find
+  the generated `baml_client`, try increasing the delay on `cargo watch` to 1 second like so:
+
+  ```bash
+  cargo watch --delay 1 -- cargo build
+  ```
+</Tip>
+
 ```toml Cargo.toml
 [dependencies]
 baml-client = { path = "./baml_client" }
diff --git a/engine/baml-runtime/src/cli/init.rs b/engine/baml-runtime/src/cli/init.rs
index d3c96dbaf..95f6cbb91 100644
--- a/engine/baml-runtime/src/cli/init.rs
+++ b/engine/baml-runtime/src/cli/init.rs
@@ -137,6 +137,10 @@ fn generate_main_baml_content(
     );
 
     let openapi_generate_command = match openapi_client_type {
+        Some("go") => format!(
+            "{} --additional-properties enumClassPrefix=true,isGoSubmodule=true,packageName=baml_client,withGoMod=false",
+            openapi_generate_command
+        ),
         Some("java") => format!(
             "{} --additional-properties generateApiTests=false,generateModelTests=false && cd ../baml_client && mvn clean install",
             openapi_generate_command
@@ -145,6 +149,10 @@ fn generate_main_baml_content(
             "{} --additional-properties composerPackageName=boundaryml/baml-client",
             openapi_generate_command
         ),
+        Some("ruby") => format!(
+            "{} --additional-properties gemName=baml_client",
+            openapi_generate_command
+        ),
         Some("rust") => format!(
             "{} --additional-properties packageName=baml-client",
             openapi_generate_command
@@ -171,7 +179,7 @@ fn generate_main_baml_content(
     // 'baml-cli generate' will run this after generating openapi.yaml, to generate your OpenAPI client
     // This command will be run from within $output_dir
     {}"#,
-        openapi_generate_command
+        openapi_generate_command.trim_start()
     );
 
     vec![
diff --git a/engine/language_client_codegen/src/openapi.rs b/engine/language_client_codegen/src/openapi.rs
index afe23a6b9..7ad24b035 100644
--- a/engine/language_client_codegen/src/openapi.rs
+++ b/engine/language_client_codegen/src/openapi.rs
@@ -70,6 +70,46 @@ impl Serialize for OpenApiSchema<'_> {
         &self,
         serializer: S,
     ) -> core::result::Result<S::Ok, S::Error> {
+        let baml_image_schema = TypeSpecWithMeta {
+            meta: TypeMetadata {
+                title: Some("BamlImage".to_string()),
+                r#enum: None,
+                r#const: None,
+                nullable: false,
+            },
+            type_spec: TypeSpec::Inline(TypeDef::Class {
+                properties: vec![
+                    (
+                        "base64".to_string(),
+                        TypeSpecWithMeta {
+                            meta: TypeMetadata {
+                                title: None,
+                                r#enum: None,
+                                r#const: None,
+                                nullable: false,
+                            },
+                            type_spec: TypeSpec::Inline(TypeDef::String),
+                        },
+                    ),
+                    (
+                        "media_type".to_string(),
+                        TypeSpecWithMeta {
+                            meta: TypeMetadata {
+                                title: None,
+                                r#enum: None,
+                                r#const: None,
+                                nullable: true,
+                            },
+                            type_spec: TypeSpec::Inline(TypeDef::String),
+                        },
+                    ),
+                ]
+                .into_iter()
+                .collect(),
+                required: vec!["base64".to_string()],
+                additional_properties: false,
+            }),
+        };
         let schemas = match self
             .schemas
             .iter()
@@ -106,7 +146,7 @@ impl Serialize for OpenApiSchema<'_> {
                 ])
                 .collect::<IndexMap<_, _>>(),
             "components": {
-                "requestBodies": self.paths.iter().map(|(p)| {
+                "requestBodies": self.paths.iter().map(|p| {
                     (p.function_name, json!({
                         "required": true,
                         "content": {
@@ -130,9 +170,9 @@ impl Serialize for OpenApiSchema<'_> {
                                         },
                                         "media_type": {
                                             "type": "string",
-                                            "nullable": true,
                                         },
-                                    }
+                                    },
+                                    "required": ["base64"],
                                 },
                                 {
                                     "type": "object",
@@ -143,9 +183,9 @@ impl Serialize for OpenApiSchema<'_> {
                                         },
                                         "media_type": {
                                             "type": "string",
-                                            "nullable": true,
                                         },
-                                    }
+                                    },
+                                    "required": ["url"],
                                 }
                             ],
                         }),
@@ -163,9 +203,9 @@ impl Serialize for OpenApiSchema<'_> {
                                         },
                                         "media_type": {
                                             "type": "string",
-                                            "nullable": true,
                                         },
-                                    }
+                                    },
+                                    "required": ["base64"],
                                 },
                                 {
                                     "type": "object",
@@ -176,9 +216,9 @@ impl Serialize for OpenApiSchema<'_> {
                                         },
                                         "media_type": {
                                             "type": "string",
-                                            "nullable": true,
                                         },
-                                    }
+                                    },
+                                    "required": ["url"],
                                 }
                             ],
                         }),
@@ -293,8 +333,16 @@ impl<'ir> TryFrom<Walker<'ir, &'ir Node<Function>>> for OpenApiMethodDef<'ir> {
             function_name,
             request_body: TypeSpecWithMeta {
                 meta: TypeMetadata {
-                    // title: Some(format!("{}Request", function_name)),
-                    title: None,
+                    // We _deliberately_ set this, even though OpenAPI doesn't require it,
+                    // because some generators will de-duplicate names of generated types
+                    // based on type shape
+                    //
+                    // For example, the Golang generator will use "ClassifyMessageRequest" as the
+                    // request type for b.GetOrderInfo if they both have (input: string) as their
+                    // function arg signature (I think the Java generator too?)
+                    //
+                    // title: None,
+                    title: Some(format!("{}Request", function_name)),
                     r#enum: None,
                     r#const: None,
                     nullable: false,
@@ -468,7 +516,9 @@ impl<'ir> ToTypeReferenceInTypeDefinition<'ir> for FieldType {
                     TypeValue::Float => TypeSpec::Inline(TypeDef::Float),
                     // TODO: should this support "format: int64"?
                     TypeValue::Int => TypeSpec::Inline(TypeDef::Int),
-                    TypeValue::Null => anyhow::bail!("OpenAPI does not support null literals"),
+                    TypeValue::Null => anyhow::bail!(
+                        "BAML<->OpenAPI only allows nulls in unions, not as a literal"
+                    ),
                     TypeValue::String => TypeSpec::Inline(TypeDef::String),
                     TypeValue::Media(BamlMediaType::Audio) => TypeSpec::Ref {
                         r#ref: format!("#/components/schemas/BamlAudio"),
@@ -479,7 +529,7 @@ impl<'ir> ToTypeReferenceInTypeDefinition<'ir> for FieldType {
                 },
             },
             FieldType::Union(inner) => {
-                let (null_types, nonnull_types): (Vec<_>, Vec<_>) =
+                let (_nulls, nonnull_types): (Vec<_>, Vec<_>) =
                     inner.into_iter().partition(|t| t.is_null());
 
                 // dbg!(&null_types);
@@ -487,17 +537,16 @@ impl<'ir> ToTypeReferenceInTypeDefinition<'ir> for FieldType {
                 let one_of = nonnull_types
                     .iter()
                     .map(|t| t.to_type_spec(ir))
-                    .collect::<Result<_>>()?;
+                    .collect::<Result<Vec<_>>>()?;
+                if one_of.is_empty() {
+                    anyhow::bail!("BAML<->OpenAPI unions must have at least one non-null type")
+                }
                 TypeSpecWithMeta {
                     meta: TypeMetadata {
                         title: None,
                         r#enum: None,
                         r#const: None,
-                        nullable: if nonnull_types.is_empty() {
-                            false
-                        } else {
-                            true
-                        },
+                        nullable: false,
                     },
                     type_spec: TypeSpec::Union { one_of },
                 }
@@ -507,8 +556,8 @@ impl<'ir> ToTypeReferenceInTypeDefinition<'ir> for FieldType {
             }
             FieldType::Optional(inner) => {
                 let mut type_spec = inner.to_type_spec(ir)?;
-                type_spec.meta.nullable = true;
-                // TODO: if type_spec is of an enum, add "null" to the list of values
+                // TODO: if type_spec is of an enum, consider adding "null" to the list of values
+                // something i saw suggested doing this
                 type_spec
             }
         })
diff --git a/integ-tests/openapi/baml_client/openapi.yaml b/integ-tests/openapi/baml_client/openapi.yaml
index 1d8303d0f..aa854e441 100644
--- a/integ-tests/openapi/baml_client/openapi.yaml
+++ b/integ-tests/openapi/baml_client/openapi.yaml
@@ -95,7 +95,6 @@ paths:
             application/json:
               schema:
                 title: CustomTaskResponse
-                nullable: true
                 oneOf:
                 - $ref: '#/components/schemas/BookOrder'
                 - $ref: '#/components/schemas/FlightConfirmation'
@@ -300,7 +299,6 @@ paths:
             application/json:
               schema:
                 title: FnClassOptionalOutputResponse
-                nullable: true
                 $ref: '#/components/schemas/ClassOptionalOutput'
       operationId: FnClassOptionalOutput
   /call/FnClassOptionalOutput2:
@@ -314,7 +312,6 @@ paths:
             application/json:
               schema:
                 title: FnClassOptionalOutput2Response
-                nullable: true
                 $ref: '#/components/schemas/ClassOptionalOutput2'
       operationId: FnClassOptionalOutput2
   /call/FnEnumListOutput:
@@ -544,7 +541,6 @@ paths:
                 title: OptionalTest_FunctionResponse
                 type: array
                 items:
-                  nullable: true
                   $ref: '#/components/schemas/OptionalTest_ReturnType'
       operationId: OptionalTest_Function
   /call/PromptTestClaude:
@@ -1056,6 +1052,7 @@ components:
       content:
         application/json:
           schema:
+            title: AaaSamOutputFormatRequest
             type: object
             properties:
               recipe:
@@ -1068,6 +1065,7 @@ components:
       content:
         application/json:
           schema:
+            title: AudioInputRequest
             type: object
             properties:
               aud:
@@ -1080,6 +1078,7 @@ components:
       content:
         application/json:
           schema:
+            title: ClassifyMessageRequest
             type: object
             properties:
               input:
@@ -1092,6 +1091,7 @@ components:
       content:
         application/json:
           schema:
+            title: ClassifyMessage2Request
             type: object
             properties:
               input:
@@ -1104,6 +1104,7 @@ components:
       content:
         application/json:
           schema:
+            title: ClassifyMessage3Request
             type: object
             properties:
               input:
@@ -1116,6 +1117,7 @@ components:
       content:
         application/json:
           schema:
+            title: CustomTaskRequest
             type: object
             properties:
               input:
@@ -1128,6 +1130,7 @@ components:
       content:
         application/json:
           schema:
+            title: DescribeImageRequest
             type: object
             properties:
               img:
@@ -1140,6 +1143,7 @@ components:
       content:
         application/json:
           schema:
+            title: DescribeImage2Request
             type: object
             properties:
               classWithImage:
@@ -1155,6 +1159,7 @@ components:
       content:
         application/json:
           schema:
+            title: DescribeImage3Request
             type: object
             properties:
               classWithImage:
@@ -1170,6 +1175,7 @@ components:
       content:
         application/json:
           schema:
+            title: DescribeImage4Request
             type: object
             properties:
               classWithImage:
@@ -1185,6 +1191,7 @@ components:
       content:
         application/json:
           schema:
+            title: DummyOutputFunctionRequest
             type: object
             properties:
               input:
@@ -1197,6 +1204,7 @@ components:
       content:
         application/json:
           schema:
+            title: DynamicFuncRequest
             type: object
             properties:
               input:
@@ -1209,6 +1217,7 @@ components:
       content:
         application/json:
           schema:
+            title: DynamicInputOutputRequest
             type: object
             properties:
               input:
@@ -1221,6 +1230,7 @@ components:
       content:
         application/json:
           schema:
+            title: DynamicListInputOutputRequest
             type: object
             properties:
               input:
@@ -1235,6 +1245,7 @@ components:
       content:
         application/json:
           schema:
+            title: ExpectFailureRequest
             type: object
             properties: {}
             required: []
@@ -1244,6 +1255,7 @@ components:
       content:
         application/json:
           schema:
+            title: ExtractNamesRequest
             type: object
             properties:
               input:
@@ -1256,6 +1268,7 @@ components:
       content:
         application/json:
           schema:
+            title: ExtractPeopleRequest
             type: object
             properties:
               text:
@@ -1268,6 +1281,7 @@ components:
       content:
         application/json:
           schema:
+            title: ExtractReceiptInfoRequest
             type: object
             properties:
               email:
@@ -1280,12 +1294,12 @@ components:
       content:
         application/json:
           schema:
+            title: ExtractResumeRequest
             type: object
             properties:
               resume:
                 type: string
               img:
-                nullable: true
                 $ref: '#/components/schemas/BamlImage'
             required:
             - resume
@@ -1295,6 +1309,7 @@ components:
       content:
         application/json:
           schema:
+            title: ExtractResume2Request
             type: object
             properties:
               resume:
@@ -1307,6 +1322,7 @@ components:
       content:
         application/json:
           schema:
+            title: FnClassOptionalOutputRequest
             type: object
             properties:
               input:
@@ -1319,6 +1335,7 @@ components:
       content:
         application/json:
           schema:
+            title: FnClassOptionalOutput2Request
             type: object
             properties:
               input:
@@ -1331,6 +1348,7 @@ components:
       content:
         application/json:
           schema:
+            title: FnEnumListOutputRequest
             type: object
             properties:
               input:
@@ -1343,6 +1361,7 @@ components:
       content:
         application/json:
           schema:
+            title: FnEnumOutputRequest
             type: object
             properties:
               input:
@@ -1355,10 +1374,10 @@ components:
       content:
         application/json:
           schema:
+            title: FnNamedArgsSingleStringOptionalRequest
             type: object
             properties:
               myString:
-                nullable: true
                 type: string
             required: []
             additionalProperties: false
@@ -1367,6 +1386,7 @@ components:
       content:
         application/json:
           schema:
+            title: FnOutputBoolRequest
             type: object
             properties:
               input:
@@ -1379,6 +1399,7 @@ components:
       content:
         application/json:
           schema:
+            title: FnOutputClassRequest
             type: object
             properties:
               input:
@@ -1391,6 +1412,7 @@ components:
       content:
         application/json:
           schema:
+            title: FnOutputClassListRequest
             type: object
             properties:
               input:
@@ -1403,6 +1425,7 @@ components:
       content:
         application/json:
           schema:
+            title: FnOutputClassNestedRequest
             type: object
             properties:
               input:
@@ -1415,6 +1438,7 @@ components:
       content:
         application/json:
           schema:
+            title: FnOutputClassWithEnumRequest
             type: object
             properties:
               input:
@@ -1427,6 +1451,7 @@ components:
       content:
         application/json:
           schema:
+            title: FnOutputStringListRequest
             type: object
             properties:
               input:
@@ -1439,6 +1464,7 @@ components:
       content:
         application/json:
           schema:
+            title: FnTestAliasedEnumOutputRequest
             type: object
             properties:
               input:
@@ -1451,6 +1477,7 @@ components:
       content:
         application/json:
           schema:
+            title: FnTestClassAliasRequest
             type: object
             properties:
               input:
@@ -1463,6 +1490,7 @@ components:
       content:
         application/json:
           schema:
+            title: FnTestNamedArgsSingleEnumRequest
             type: object
             properties:
               myArg:
@@ -1475,6 +1503,7 @@ components:
       content:
         application/json:
           schema:
+            title: GetDataTypeRequest
             type: object
             properties:
               text:
@@ -1487,6 +1516,7 @@ components:
       content:
         application/json:
           schema:
+            title: GetOrderInfoRequest
             type: object
             properties:
               email:
@@ -1499,6 +1529,7 @@ components:
       content:
         application/json:
           schema:
+            title: GetQueryRequest
             type: object
             properties:
               query:
@@ -1511,6 +1542,7 @@ components:
       content:
         application/json:
           schema:
+            title: MyFuncRequest
             type: object
             properties:
               input:
@@ -1523,6 +1555,7 @@ components:
       content:
         application/json:
           schema:
+            title: OptionalTest_FunctionRequest
             type: object
             properties:
               input:
@@ -1535,6 +1568,7 @@ components:
       content:
         application/json:
           schema:
+            title: PromptTestClaudeRequest
             type: object
             properties:
               input:
@@ -1547,6 +1581,7 @@ components:
       content:
         application/json:
           schema:
+            title: PromptTestClaudeChatRequest
             type: object
             properties:
               input:
@@ -1559,6 +1594,7 @@ components:
       content:
         application/json:
           schema:
+            title: PromptTestClaudeChatNoSystemRequest
             type: object
             properties:
               input:
@@ -1571,6 +1607,7 @@ components:
       content:
         application/json:
           schema:
+            title: PromptTestOpenAIRequest
             type: object
             properties:
               input:
@@ -1583,6 +1620,7 @@ components:
       content:
         application/json:
           schema:
+            title: PromptTestOpenAIChatRequest
             type: object
             properties:
               input:
@@ -1595,6 +1633,7 @@ components:
       content:
         application/json:
           schema:
+            title: PromptTestOpenAIChatNoSystemRequest
             type: object
             properties:
               input:
@@ -1607,6 +1646,7 @@ components:
       content:
         application/json:
           schema:
+            title: PromptTestStreamingRequest
             type: object
             properties:
               input:
@@ -1619,6 +1659,7 @@ components:
       content:
         application/json:
           schema:
+            title: SchemaDescriptionsRequest
             type: object
             properties:
               input:
@@ -1631,6 +1672,7 @@ components:
       content:
         application/json:
           schema:
+            title: TestAnthropicRequest
             type: object
             properties:
               input:
@@ -1643,6 +1685,7 @@ components:
       content:
         application/json:
           schema:
+            title: TestAnthropicShorthandRequest
             type: object
             properties:
               input:
@@ -1655,6 +1698,7 @@ components:
       content:
         application/json:
           schema:
+            title: TestAwsRequest
             type: object
             properties:
               input:
@@ -1667,6 +1711,7 @@ components:
       content:
         application/json:
           schema:
+            title: TestAzureRequest
             type: object
             properties:
               input:
@@ -1679,6 +1724,7 @@ components:
       content:
         application/json:
           schema:
+            title: TestCachingRequest
             type: object
             properties:
               input:
@@ -1691,6 +1737,7 @@ components:
       content:
         application/json:
           schema:
+            title: TestFallbackClientRequest
             type: object
             properties: {}
             required: []
@@ -1700,6 +1747,7 @@ components:
       content:
         application/json:
           schema:
+            title: TestFallbackToShorthandRequest
             type: object
             properties:
               input:
@@ -1712,6 +1760,7 @@ components:
       content:
         application/json:
           schema:
+            title: TestFnNamedArgsSingleBoolRequest
             type: object
             properties:
               myBool:
@@ -1724,6 +1773,7 @@ components:
       content:
         application/json:
           schema:
+            title: TestFnNamedArgsSingleClassRequest
             type: object
             properties:
               myArg:
@@ -1736,6 +1786,7 @@ components:
       content:
         application/json:
           schema:
+            title: TestFnNamedArgsSingleEnumListRequest
             type: object
             properties:
               myArg:
@@ -1750,6 +1801,7 @@ components:
       content:
         application/json:
           schema:
+            title: TestFnNamedArgsSingleFloatRequest
             type: object
             properties:
               myFloat:
@@ -1762,6 +1814,7 @@ components:
       content:
         application/json:
           schema:
+            title: TestFnNamedArgsSingleIntRequest
             type: object
             properties:
               myInt:
@@ -1774,6 +1827,7 @@ components:
       content:
         application/json:
           schema:
+            title: TestFnNamedArgsSingleMapStringToClassRequest
             type: object
             properties:
               myMap:
@@ -1788,6 +1842,7 @@ components:
       content:
         application/json:
           schema:
+            title: TestFnNamedArgsSingleMapStringToMapRequest
             type: object
             properties:
               myMap:
@@ -1804,6 +1859,7 @@ components:
       content:
         application/json:
           schema:
+            title: TestFnNamedArgsSingleMapStringToStringRequest
             type: object
             properties:
               myMap:
@@ -1818,6 +1874,7 @@ components:
       content:
         application/json:
           schema:
+            title: TestFnNamedArgsSingleStringRequest
             type: object
             properties:
               myString:
@@ -1830,6 +1887,7 @@ components:
       content:
         application/json:
           schema:
+            title: TestFnNamedArgsSingleStringArrayRequest
             type: object
             properties:
               myStringArray:
@@ -1844,6 +1902,7 @@ components:
       content:
         application/json:
           schema:
+            title: TestFnNamedArgsSingleStringListRequest
             type: object
             properties:
               myArg:
@@ -1858,6 +1917,7 @@ components:
       content:
         application/json:
           schema:
+            title: TestGeminiRequest
             type: object
             properties:
               input:
@@ -1870,6 +1930,7 @@ components:
       content:
         application/json:
           schema:
+            title: TestImageInputRequest
             type: object
             properties:
               img:
@@ -1882,6 +1943,7 @@ components:
       content:
         application/json:
           schema:
+            title: TestImageInputAnthropicRequest
             type: object
             properties:
               img:
@@ -1894,6 +1956,7 @@ components:
       content:
         application/json:
           schema:
+            title: TestImageListInputRequest
             type: object
             properties:
               imgs:
@@ -1908,6 +1971,7 @@ components:
       content:
         application/json:
           schema:
+            title: TestMulticlassNamedArgsRequest
             type: object
             properties:
               myArg:
@@ -1923,6 +1987,7 @@ components:
       content:
         application/json:
           schema:
+            title: TestOllamaRequest
             type: object
             properties:
               input:
@@ -1935,6 +2000,7 @@ components:
       content:
         application/json:
           schema:
+            title: TestOpenAILegacyProviderRequest
             type: object
             properties:
               input:
@@ -1947,6 +2013,7 @@ components:
       content:
         application/json:
           schema:
+            title: TestOpenAIShorthandRequest
             type: object
             properties:
               input:
@@ -1959,6 +2026,7 @@ components:
       content:
         application/json:
           schema:
+            title: TestRetryConstantRequest
             type: object
             properties: {}
             required: []
@@ -1968,6 +2036,7 @@ components:
       content:
         application/json:
           schema:
+            title: TestRetryExponentialRequest
             type: object
             properties: {}
             required: []
@@ -1977,6 +2046,7 @@ components:
       content:
         application/json:
           schema:
+            title: TestVertexRequest
             type: object
             properties:
               input:
@@ -1989,10 +2059,10 @@ components:
       content:
         application/json:
           schema:
+            title: UnionTest_FunctionRequest
             type: object
             properties:
               input:
-                nullable: true
                 oneOf:
                 - type: string
                 - type: boolean
@@ -2009,7 +2079,8 @@ components:
             type: string
           media_type:
             type: string
-            nullable: true
+        required:
+        - base64
       - type: object
         title: BamlImageUrl
         properties:
@@ -2017,7 +2088,8 @@ components:
             type: string
           media_type:
             type: string
-            nullable: true
+        required:
+        - url
     BamlAudio:
       oneOf:
       - type: object
@@ -2027,7 +2099,8 @@ components:
             type: string
           media_type:
             type: string
-            nullable: true
+        required:
+        - base64
       - type: object
         title: BamlAudioUrl
         properties:
@@ -2035,7 +2108,8 @@ components:
             type: string
           media_type:
             type: string
-            nullable: true
+        required:
+        - url
     Category:
       enum:
       - Refund
@@ -2140,7 +2214,6 @@ components:
       type: object
       properties:
         prop4:
-          nullable: true
           type: string
       required: []
       additionalProperties: false
@@ -2176,13 +2249,10 @@ components:
       type: object
       properties:
         prop1:
-          nullable: true
           type: string
         prop2:
-          nullable: true
           type: string
         prop3:
-          nullable: true
           $ref: '#/components/schemas/Blah'
       required: []
       additionalProperties: false
@@ -2204,15 +2274,12 @@ components:
       type: object
       properties:
         bookOrder:
-          nullable: true
           oneOf:
           - $ref: '#/components/schemas/BookOrder'
         flightConfirmation:
-          nullable: true
           oneOf:
           - $ref: '#/components/schemas/FlightConfirmation'
         groceryReceipt:
-          nullable: true
           oneOf:
           - $ref: '#/components/schemas/GroceryReceipt'
       required: []
@@ -2274,7 +2341,6 @@ components:
           items:
             type: string
         graduation_date:
-          nullable: true
           type: string
       required:
       - institution
@@ -2351,7 +2417,6 @@ components:
         items:
           type: array
           items:
-            nullable: true
             oneOf:
             - type: string
             - type: integer
@@ -2407,11 +2472,9 @@ components:
       type: object
       properties:
         prop3:
-          nullable: true
           oneOf:
           - type: string
         prop4:
-          nullable: true
           oneOf:
           - type: string
         prop20:
@@ -2423,11 +2486,9 @@ components:
       type: object
       properties:
         prop11:
-          nullable: true
           oneOf:
           - type: string
         prop12:
-          nullable: true
           oneOf:
           - type: string
       required: []
@@ -2447,15 +2508,12 @@ components:
       type: object
       properties:
         omega_1:
-          nullable: true
           $ref: '#/components/schemas/OptionalTest_Prop1'
         omega_2:
-          nullable: true
           type: string
         omega_3:
           type: array
           items:
-            nullable: true
             $ref: '#/components/schemas/OptionalTest_CategoryType'
       required:
       - omega_3
@@ -2466,10 +2524,8 @@ components:
         order_status:
           $ref: '#/components/schemas/OrderStatus'
         tracking_number:
-          nullable: true
           type: string
         estimated_arrival_date:
-          nullable: true
           type: string
       required:
       - order_status
@@ -2478,10 +2534,8 @@ components:
       type: object
       properties:
         name:
-          nullable: true
           type: string
         hair_color:
-          nullable: true
           $ref: '#/components/schemas/Color'
       required: []
       additionalProperties: false
@@ -2489,12 +2543,10 @@ components:
       type: object
       properties:
         amount:
-          nullable: true
           oneOf:
           - type: integer
           - type: number
         unit:
-          nullable: true
           type: string
       required:
       - amount
@@ -2505,7 +2557,6 @@ components:
         dataType:
           $ref: '#/components/schemas/DataType'
         value:
-          nullable: true
           oneOf:
           - $ref: '#/components/schemas/Resume'
           - $ref: '#/components/schemas/Event'
@@ -2521,7 +2572,6 @@ components:
           items:
             $ref: '#/components/schemas/ReceiptItem'
         total_cost:
-          nullable: true
           type: number
       required:
       - items
@@ -2532,7 +2582,6 @@ components:
         name:
           type: string
         description:
-          nullable: true
           type: string
         quantity:
           type: integer
@@ -2586,22 +2635,18 @@ components:
       type: object
       properties:
         prop1:
-          nullable: true
           oneOf:
           - type: string
         prop2:
-          nullable: true
           oneOf:
           - $ref: '#/components/schemas/Nested'
           - type: string
         prop5:
           type: array
           items:
-            nullable: true
             oneOf:
             - type: string
         prop6:
-          nullable: true
           oneOf:
           - type: string
           - type: array
@@ -2610,20 +2655,16 @@ components:
         nested_attrs:
           type: array
           items:
-            nullable: true
             oneOf:
             - type: string
             - $ref: '#/components/schemas/Nested'
         parens:
-          nullable: true
           oneOf:
           - type: string
         other_group:
-          nullable: true
           oneOf:
           - type: string
-          - nullable: true
-            oneOf:
+          - oneOf:
             - type: integer
             - type: string
       required:
@@ -2637,17 +2678,14 @@ components:
       type: object
       properties:
         dateRange:
-          nullable: true
           type: integer
         location:
           type: array
           items:
             type: string
         jobTitle:
-          nullable: true
           $ref: '#/components/schemas/WithReasoning'
         company:
-          nullable: true
           $ref: '#/components/schemas/WithReasoning'
         description:
           type: array
@@ -2656,7 +2694,6 @@ components:
         tags:
           type: array
           items:
-            nullable: true
             oneOf:
             - $ref: '#/components/schemas/Tag'
             - type: string
@@ -2738,19 +2775,16 @@ components:
       type: object
       properties:
         prop1:
-          nullable: true
           oneOf:
           - type: string
           - type: boolean
         prop2:
           type: array
           items:
-            nullable: true
             oneOf:
             - type: number
             - type: boolean
         prop3:
-          nullable: true
           oneOf:
           - type: array
             items: