fix(ai): keep refusal content in OpenAI Responses API output (#5563)

* fix(ai): keep refusal content in OpenAI Responses API output

* test(webpack-plugin): allow production builds time to finish in CI

---------

Co-authored-by: Manoel Aranda Neto <marandaneto@gmail.com>

Author: pcbeingused333

.changeset/ai-responses-refusal.md

@@ -0,0 +1,5 @@
+---
+'@posthog/ai': patch
+---
+
+Keep the refusal text of OpenAI Responses API outputs instead of dropping it from the captured `$ai_output_choices`

packages/ai/src/utils.ts

@@ -260,6 +260,8 @@ export const formatResponseOpenAI = (response: any): FormattedMessage[] => {
               content.push({ type: 'text', text: contentItem.text })
             } else if (contentItem.text) {
               content.push({ type: 'text', text: contentItem.text })
+            } else if (contentItem.type === 'refusal' && contentItem.refusal) {
+              content.push({ type: 'refusal', refusal: contentItem.refusal })
             } else if (contentItem.type === 'input_image' && contentItem.image_url) {
               content.push({
                 type: 'image',

packages/ai/tests/tools.test.ts

@@ -196,6 +196,22 @@ describe('Tool Handling Tests', () => {
       ])
     })
 
+    it('should keep the refusal of a refused Responses API request', () => {
+      const response = {
+        output: [
+          {
+            type: 'message',
+            role: 'assistant',
+            content: [{ type: 'refusal', refusal: "I can't help with that" }],
+          },
+        ],
+      }
+
+      expect(formatResponseOpenAI(response)).toEqual([
+        { role: 'assistant', content: [{ type: 'refusal', refusal: "I can't help with that" }] },
+      ])
+    })
+
     it('should format response with only tool calls', () => {
       const response = {
         choices: [

packages/webpack-plugin/vitest.config.ts

@@ -11,6 +11,8 @@ export default defineConfig({
         globals: true,
         clearMocks: true,
         environment: 'node',
+        // Production webpack builds can exceed the default five seconds on shared CI runners.
+        testTimeout: 30_000,
         exclude: [...configDefaults.exclude, 'dist/**'],
     },
 })