feat(api): add additional instructions for runs (#586)

Author: stainless-bot

src/resources/beta/threads/runs/runs.ts

@@ -343,8 +343,16 @@ export interface RunCreateParams {
   assistant_id: string;
 
   /**
-   * Override the default system message of the assistant. This is useful for
-   * modifying the behavior on a per-run basis.
+   * 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.
+   */
+  additional_instructions?: string | null;
+
+  /**
+   * Overrides the
+   * [instructions](https://platform.openai.com/docs/api-reference/assistants/createAssistant)
+   * of the assistant. This is useful for modifying the behavior on a per-run basis.
    */
   instructions?: string | null;
 

tests/api-resources/beta/threads/runs/runs.test.ts

@@ -23,6 +23,7 @@ describe('resource runs', () => {
   test('create: required and optional params', async () => {
     const response = await openai.beta.threads.runs.create('string', {
       assistant_id: 'string',
+      additional_instructions: 'string',
       instructions: 'string',
       metadata: {},
       model: 'string',