fix: Use allOf to require conversation_id only on createConversation

The previous approach added conversation_id to the shared message
schema's required array, which would incorrectly enforce it on all
endpoints using that schema (including createMessage, where admin
messages don't include conversation_id). Instead, use allOf at the
createConversation endpoint level to extend the message schema with
conversation_id as required — matching the established pattern used
elsewhere in these specs.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: markdennis22

descriptions/0/api.intercom.io.yaml

@@ -6707,7 +6707,10 @@ paths:
                     message_type: inapp
                     conversation_id: '499'
               schema:
-                "$ref": "#/components/schemas/message"
+                allOf:
+                - "$ref": "#/components/schemas/message"
+                required:
+                - conversation_id
         '404':
           description: Contact Not Found
           content:
@@ -24664,7 +24667,6 @@ components:
       - created_at
       - body
       - message_type
-      - conversation_id
     whatsapp_message_status_list:
       type: object
       required:

descriptions/2.10/api.intercom.io.yaml

@@ -4373,7 +4373,10 @@ paths:
                     message_type: inapp
                     conversation_id: '483'
               schema:
-                "$ref": "#/components/schemas/message"
+                allOf:
+                - "$ref": "#/components/schemas/message"
+                required:
+                - conversation_id
         '404':
           description: Contact Not Found
           content:
@@ -15190,7 +15193,6 @@ components:
       - created_at
       - body
       - message_type
-      - conversation_id
     multiple_or_single_filter_search_request:
       title: Multiple or Single Filter Search Request
       oneOf:

descriptions/2.12/api.intercom.io.yaml

@@ -4989,7 +4989,10 @@ paths:
                     message_type: inapp
                     conversation_id: '33'
               schema:
-                "$ref": "#/components/schemas/message"
+                allOf:
+                - "$ref": "#/components/schemas/message"
+                required:
+                - conversation_id
         '404':
           description: Contact Not Found
           content:
@@ -16487,7 +16490,6 @@ components:
       - created_at
       - body
       - message_type
-      - conversation_id
     multiple_or_single_filter_search_request:
       title: Multiple or Single Filter Search Request
       oneOf:

descriptions/2.13/api.intercom.io.yaml

@@ -5660,7 +5660,10 @@ paths:
                     message_type: inapp
                     conversation_id: '33'
               schema:
-                "$ref": "#/components/schemas/message"
+                allOf:
+                - "$ref": "#/components/schemas/message"
+                required:
+                - conversation_id
         '404':
           description: Contact Not Found
           content:
@@ -18190,7 +18193,6 @@ components:
       - created_at
       - body
       - message_type
-      - conversation_id
     multiple_filter_search_request:
       title: Multiple Filter Search Request
       description: Search using Intercoms Search APIs with more than one filter.

descriptions/2.14/api.intercom.io.yaml

@@ -6120,7 +6120,10 @@ paths:
                     message_type: inapp
                     conversation_id: '499'
               schema:
-                "$ref": "#/components/schemas/message"
+                allOf:
+                - "$ref": "#/components/schemas/message"
+                required:
+                - conversation_id
         '404':
           description: Contact Not Found
           content:
@@ -20019,7 +20022,6 @@ components:
       - created_at
       - body
       - message_type
-      - conversation_id
     whatsapp_message_status_list:
       type: object
       required:

descriptions/2.15/api.intercom.io.yaml

@@ -6191,7 +6191,10 @@ paths:
                     message_type: inapp
                     conversation_id: '499'
               schema:
-                "$ref": "#/components/schemas/message"
+                allOf:
+                - "$ref": "#/components/schemas/message"
+                required:
+                - conversation_id
         '404':
           description: Contact Not Found
           content:
@@ -20847,7 +20850,6 @@ components:
       - created_at
       - body
       - message_type
-      - conversation_id
     whatsapp_message_status_list:
       type: object
       required:

descriptions/2.7/api.intercom.io.yaml

@@ -4582,7 +4582,10 @@ paths:
                     message_type: inapp
                     conversation_id: '33'
               schema:
-                "$ref": "#/components/schemas/message"
+                allOf:
+                - "$ref": "#/components/schemas/message"
+                required:
+                - conversation_id
         '404':
           description: Contact Not Found
           content:
@@ -13106,7 +13109,6 @@ components:
       - created_at
       - body
       - message_type
-      - conversation_id
     multiple_or_single_filter_search_request:
       title: Multiple or Single Filter Search Request
       oneOf:

descriptions/2.8/api.intercom.io.yaml

@@ -4582,7 +4582,10 @@ paths:
                     message_type: inapp
                     conversation_id: '181'
               schema:
-                "$ref": "#/components/schemas/message"
+                allOf:
+                - "$ref": "#/components/schemas/message"
+                required:
+                - conversation_id
         '404':
           description: Contact Not Found
           content:
@@ -13131,7 +13134,6 @@ components:
       - created_at
       - body
       - message_type
-      - conversation_id
     multiple_or_single_filter_search_request:
       title: Multiple or Single Filter Search Request
       oneOf:

descriptions/2.9/api.intercom.io.yaml

@@ -4583,7 +4583,10 @@ paths:
                     message_type: inapp
                     conversation_id: '329'
               schema:
-                "$ref": "#/components/schemas/message"
+                allOf:
+                - "$ref": "#/components/schemas/message"
+                required:
+                - conversation_id
         '404':
           description: Contact Not Found
           content:
@@ -14483,7 +14486,6 @@ components:
       - created_at
       - body
       - message_type
-      - conversation_id
     multiple_or_single_filter_search_request:
       title: Multiple or Single Filter Search Request
       oneOf: