diff --git a/website/src/content/docs/docs/howtos/Generate client libraries/06types.mdx b/website/src/content/docs/docs/howtos/Generate client libraries/06types.mdx
index 9defa74f3c..05ccc575b2 100644
--- a/website/src/content/docs/docs/howtos/Generate client libraries/06types.mdx	
+++ b/website/src/content/docs/docs/howtos/Generate client libraries/06types.mdx	
@@ -703,14 +703,6 @@ public final class Animal implements JsonSerializable<Animal> {
 <ClientTabs>
 <ClientTabItem lang="typespec" >
 
-```typespec
-model Animal {
-  name: string;
-  kind: string;
-  ...Record<string | int32>;
-}
-```
-
 ```typespec
 model Animal {
   name: string;
@@ -963,7 +955,7 @@ TypeSpec uses `@discriminator` decorator to add a discriminator to a model.
 <ClientTabs>
 <ClientTabItem lang="typespec" >
 
-TypeSpec now has two ways to represent a discriminated set.
+Client emitters now only support a single way to represent a discriminated set in TypeSpec.
 
 1. Use model
 
@@ -1005,20 +997,6 @@ model Ragdoll extends Cat {
 }
 ```
 
-2. Use union
-
-```typespec
-@discriminator("kind")
-union Cat {
-  Siamese,
-  Ragdoll,
-}
-
-model Siamese {}
-
-model Ragdoll {}
-```
-
 </ClientTabItem>
 <ClientTabItem lang="tcgc">
 
@@ -1250,7 +1228,6 @@ about nullability by inspecting the type of a property.
 model Foo {
   basicNullableProperty: string | null;
   modelNullableProperty: Bar | null;
-  unionNullableProperty: Bar | Baz | null;
   enumNullableProperty: LR | null;
 }
 
@@ -1258,10 +1235,6 @@ model Bar {
   prop: string;
 }
 
-model Baz {
-  prop: int32;
-}
-
 enum LR {
   left,
   right,
@@ -1316,52 +1289,6 @@ A nullable type has kind `nullable` and property `valueType`. The kind of the ty
         }
       }
     },
-    {
-      "kind": "property",
-      "name": "unionNullableProperty",
-      "serializedName": "unionNullableProperty",
-      "optional": false,
-      "type": {
-        "kind": "nullable",
-        "valueType": {
-          "kind": "union",
-          "values": [
-            {
-              "kind": "model",
-              "name": "Bar",
-              "properties": [
-                {
-                  "kind": "property",
-                  "name": "prop",
-                  "serializedName": "prop",
-                  "optional": false,
-                  "type": {
-                    "kind": "string",
-                    "encode": "string"
-                  }
-                }
-              ]
-            },
-            {
-              "kind": "model",
-              "name": "Baz",
-              "properties": [
-                {
-                  "kind": "property",
-                  "name": "prop",
-                  "serializedName": "prop",
-                  "optional": false,
-                  "type": {
-                    "kind": "int32",
-                    "encode": "int32"
-                  }
-                }
-              ]
-            }
-          ]
-        }
-      }
-    },
     {
       "kind": "property",
       "name": "enumNullableProperty",
@@ -1409,9 +1336,6 @@ from corehttp.utils import CaseInsensitiveEnumMeta
 class Bar(_model_base.Model):
   prop: Optional[str] = rest_field()
 
-class Baz(_model_base.Model):
-  prop: Optional[str] = rest_field()
-
 class LR(str, Enum, metaclass=CaseInsensitiveEnumMeta):
   LEFT = "left"
   RIGHT = "right"
@@ -1419,7 +1343,6 @@ class LR(str, Enum, metaclass=CaseInsensitiveEnumMeta):
 class Foo(_model_base.Model):
   basicNullableProperty: Optional[str] = rest_field()
   modelNullableProperty: Optional["_models.Bar"] = rest_field()
-  unionNullableProperty: Optional[Union["_models.Bar", "_models.Baz"]] = rest_field()
   enumNullableProperty: Optional["LR"] = rest_field()
 
 ```
@@ -2314,108 +2237,6 @@ public enum WidgetOrientation {
 </ClientTabItem>
 </ClientTabs>
 
-### Union with multiple types
-
-These are unions where the values don't share same type.
-
-<ClientTabs>
-<ClientTabItem lang="typespec" >
-
-```typespec
-model Shirt {
-  sizing: 32 | 34 | int32 | "small" | "medium" | string;
-}
-```
-
-</ClientTabItem>
-<ClientTabItem lang="tcgc">
-
-```json
-{
-  "kind": "union",
-  "name": "ShirtSizings",
-  "generatedName": true,
-  "values": [
-    {
-      "kind": "constant",
-      "value": 32,
-      "valueType": {
-        "kind": "int32"
-      }
-    },
-    {
-      "kind": "constant",
-      "value": 34,
-      "valueType": {
-        "kind": "int32"
-      }
-    },
-    {
-      "kind": "constant",
-      "value": "small",
-      "valueType": {
-        "kind": "string"
-      }
-    },
-    {
-      "kind": "constant",
-      "value": "medium",
-      "valueType": {
-        "kind": "string"
-      }
-    },
-    {
-      "kind": "string"
-    }
-  ]
-}
-```
-
-</ClientTabItem>
-<ClientTabItem lang="python">
-
-Python will generate this as a union since these entries don't share the same type
-
-```python
-from typing import Literal
-
-type ShirtSizing = Literal[32] | Literal[34] | int | Literal["small"] | Literal["medium"] | str
-
-model Shirt:
-  sizing: ShirtSizing
-```
-
-</ClientTabItem>
-<ClientTabItem lang="csharp" >
-
-```csharp
-public partial class Shirt
-{
-  public BinaryData Shirt;
-}
-```
-
-</ClientTabItem>
-<ClientTabItem lang="typescript" >
-
-```typescript
-export interface Shirt {
-  sizing: 32 | 34 | number | "small" | "medium" | string;
-}
-```
-
-</ClientTabItem>
-<ClientTabItem lang="java" >
-
-```java
-public final class Shirt {
-    private BinaryData sizing;
-}
-```
-
-</ClientTabItem>
-</ClientTabs>
-
 ## Enums
 
 ### Standard
@@ -2706,7 +2527,7 @@ We will take the `@encode` decorator into account, determining how we serialize
 <ClientTabs>
 <ClientTabItem lang="typespec" >
 
-```tsp
+```typespec
 model Test {
   @encode(DateTimeKnownEncoding.rfc3339)
   prop: utcDateTime;
@@ -2769,7 +2590,7 @@ When you specify an encoding type, say that you want to encode an integer as a s
 <ClientTabs>
 <ClientTabItem lang="typespec" >
 
-```tsp
+```typespec
 model Test {
   @encode(string)
   prop: int64;
diff --git a/website/src/content/docs/docs/howtos/Generate client libraries/08methodInputs.mdx b/website/src/content/docs/docs/howtos/Generate client libraries/08methodInputs.mdx
index 39bc12cc6d..ab84a94da8 100644
--- a/website/src/content/docs/docs/howtos/Generate client libraries/08methodInputs.mdx	
+++ b/website/src/content/docs/docs/howtos/Generate client libraries/08methodInputs.mdx	
@@ -14,6 +14,11 @@ This document outlines the method input signatures that language emitters will g
 <ClientTabItem lang="typespec" >
 
 ```typespec
+model User {
+  firstName: string;
+  lastName: string;
+}
+
 @get
 op get(): User;
 ```
@@ -101,6 +106,11 @@ func (client *Client) Get(ctx context.Context, options *ClientGetOptions) (Clien
 <ClientTabItem lang="typespec" >
 
 ```typespec
+model User {
+  firstName: string;
+  lastName: string;
+}
+
 @post
 op post(@body body: User): void;
 ```
@@ -624,7 +634,8 @@ model BlobProperties {
   @path
   name: string;
 
-  @header testHeader: string;
+  @header
+  testHeader: string;
 }
 
 @route("blob_properties/{name}")