Merge pull request #215 from openai/dev/ryanliu/additional_messages

[agentapi] add additional_messages as optional param

openapi.yaml

@@ -8608,6 +8608,12 @@ components:
           description: Appends additional instructions at the end of the instructions for the run. This is useful for modifying the behavior on a per-run basis without overriding other instructions.
           type: string
           nullable: true
+        additional_messages:
+          description: Adds additional messages to the thread before creating the run.
+          type: array
+          items:
+            $ref: "#/components/schemas/CreateMessageRequest"
+          nullable: true
         tools:
           description: Override the tools the assistant can use for this run. This is useful for modifying the behavior on a per-run basis.
           nullable: true