fix (ai/core): apply transform before callbacks and resolvables

.changeset/tricky-buckets-notice.md

@@ -0,0 +1,5 @@
+---
+'ai': patch
+---
+
+fix (ai/core): apply transform before callbacks and resolvables

content/docs/03-ai-sdk-core/05-generating-text.mdx

@@ -205,6 +205,11 @@ for await (const part of result.fullStream) {
 You can use the `experimental_transform` option to transform the stream.
 This is useful for e.g. filtering, changing, or smoothing the text stream.
 
+The transformations are applied before the callbacks are invoked and the promises are resolved.
+If you e.g. have a transformation that changes all text to uppercase, the `onFinish` callback will receive the transformed text.
+
+#### Smoothing streams
+
 The AI SDK Core provides a [`smoothStream` function](/docs/reference/ai-sdk-core/smooth-stream) that
 can be used to smooth out text streaming.
 

content/docs/07-reference/01-ai-sdk-core/02-stream-text.mdx

@@ -1415,19 +1415,32 @@ To see `streamText` in action, check out [these examples](#examples).
               ],
             },
             {
-              name: 'isContinued',
-              type: 'boolean',
-              description:
-                'True when there will be a continuation step with a continuation text.',
+              name: 'request',
+              type: 'RequestMetadata',
+              isOptional: true,
+              description: 'Request metadata.',
+              properties: [
+                {
+                  type: 'RequestMetadata',
+                  parameters: [
+                    {
+                      name: 'body',
+                      type: 'string',
+                      description:
+                        'Raw request HTTP body that was sent to the provider API as a string.',
+                    },
+                  ],
+                },
+              ],
             },
             {
               name: 'response',
-              type: 'Response',
+              type: 'ResponseMetadata',
               isOptional: true,
               description: 'Response metadata.',
               properties: [
                 {
-                  type: 'Response',
+                  type: 'ResponseMetadata',
                   parameters: [
                     {
                       name: 'id',
@@ -1447,10 +1460,34 @@ To see `streamText` in action, check out [these examples](#examples).
                       description:
                         'The timestamp of the response. The AI SDK uses the response timestamp from the provider response when available, and creates a timestamp otherwise.',
                     },
+                    {
+                      name: 'headers',
+                      type: 'Record<string, string>',
+                      description: 'The response headers.',
+                    },
                   ],
                 },
               ],
             },
+            {
+              name: 'warnings',
+              type: 'Warning[] | undefined',
+              description:
+                'Warnings from the model provider (e.g. unsupported settings).',
+            },
+            {
+              name: 'experimental_providerMetadata',
+              type: 'Record<string,Record<string,JSONValue>> | undefined',
+              isOptional: true,
+              description:
+                'Optional metadata from the provider. The outer key is the provider name. The inner values are the metadata. Details depend on the provider.',
+            },
+            {
+              name: 'isContinued',
+              type: 'boolean',
+              description:
+                'True when there will be a continuation step with a continuation text.',
+            },
           ],
         },
         {
@@ -1521,10 +1558,22 @@ To see `streamText` in action, check out [these examples](#examples).
                       description:
                         'The timestamp of the response. The AI SDK uses the response timestamp from the provider response when available, and creates a timestamp otherwise.',
                     },
+                    {
+                      name: 'headers',
+                      type: 'Record<string, string>',
+                      description: 'The response headers.',
+                    },
                   ],
                 },
               ],
             },
+            {
+              name: 'experimental_providerMetadata',
+              type: 'Record<string,Record<string,JSONValue>> | undefined',
+              isOptional: true,
+              description:
+                'Optional metadata from the provider. The outer key is the provider name. The inner values are the metadata. Details depend on the provider.',
+            },
           ],
         },
       ],