@ai-sdk/xai - npm Package Compare versions

Comparing version 3.0.53 to 3.0.54

CHANGELOG.md

 # @ai-sdk/xai
 
+## 3.0.54
+
+### Patch Changes
+
+- 902e93b: Add support for `response.function_call_arguments.delta` and `response.function_call_arguments.done` streaming events in the xAI Responses API provider. Previously, xAI Grok models using function tools would fail with `AI_TypeValidationError` because these standard Responses API events were missing from the Zod schema and stream handler.
+
 ## 3.0.53
@@ -4,0 +10,0 @@

package.json

 {
   "name": "@ai-sdk/xai",
-  "version": "3.0.53",
+  "version": "3.0.54",
   "license": "Apache-2.0",
@@ -32,5 +32,5 @@ "sideEffects": false,
   "dependencies": {
+    "@ai-sdk/openai-compatible": "2.0.29",
     "@ai-sdk/provider": "3.0.8",
-    "@ai-sdk/provider-utils": "4.0.14",
-    "@ai-sdk/openai-compatible": "2.0.29"
+    "@ai-sdk/provider-utils": "4.0.14"
   },
@@ -37,0 +37,0 @@ "devDependencies": {

src/responses/xai-responses-api.ts

@@ -463,3 +463,16 @@ import { z } from 'zod/v4';
   }),
+  // Function call arguments streaming events (standard function tools)
   z.object({
+    type: z.literal('response.function_call_arguments.delta'),
+    item_id: z.string(),
+    output_index: z.number(),
+    delta: z.string(),
+  }),
+  z.object({
+    type: z.literal('response.function_call_arguments.done'),
+    item_id: z.string(),
+    output_index: z.number(),
+    arguments: z.string(),
+  }),
+  z.object({
     type: z.literal('response.mcp_call.in_progress'),
@@ -466,0 +479,0 @@ item_id: z.string(),

src/responses/xai-responses-language-model.ts

@@ -453,2 +453,9 @@ import {
 
+    // Track ongoing function calls by output_index so we can stream
+    // arguments via response.function_call_arguments.delta events.
+    const ongoingToolCalls: Record<
+      number,
+      { toolName: string; toolCallId: string } | undefined
+    > = {};
+
     const activeReasoning: Record<
@@ -651,2 +658,20 @@ string,
 
+            // Function call arguments streaming (standard function tools)
+            if (event.type === 'response.function_call_arguments.delta') {
+              const toolCall = ongoingToolCalls[event.output_index];
+              if (toolCall != null) {
+                controller.enqueue({
+                  type: 'tool-input-delta',
+                  id: toolCall.toolCallId,
+                  delta: event.delta,
+                });
+              }
+              return;
+            }
+            if (event.type === 'response.function_call_arguments.done') {
+              // Arguments are fully received; output_item.done will
+              // emit tool-input-end and tool-call with the final arguments.
+              return;
+            }
+
             if (
@@ -872,4 +897,9 @@ event.type === 'response.output_item.added' ||
               } else if (part.type === 'function_call') {
-                if (!seenToolCalls.has(part.call_id)) {
-                  seenToolCalls.add(part.call_id);
+                if (event.type === 'response.output_item.added') {
+                  // Track the call so function_call_arguments.delta events
+                  // can stream the arguments incrementally.
+                  ongoingToolCalls[event.output_index] = {
+                    toolName: part.name,
+                    toolCallId: part.call_id,
+                  };
 
@@ -881,10 +911,6 @@ controller.enqueue({
                   });
+                } else if (event.type === 'response.output_item.done') {
+                  ongoingToolCalls[event.output_index] = undefined;
 
                   controller.enqueue({
-                    type: 'tool-input-delta',
-                    id: part.call_id,
-                    delta: part.arguments,
-                  });
-
-                  controller.enqueue({
                     type: 'tool-input-end',
@@ -891,0 +917,0 @@ id: part.call_id,

New alerts

Network access

Supply chain risk

This module accesses the network.

Found 1 instance in 1 package

Long strings

Supply chain risk

Contains long string literals, which may be a sign of obfuscated or packed code.

Found 1 instance in 1 package

URL strings

Supply chain risk

Package contains fragments of external URLs or IP addresses, which the package may be accessing at runtime.

Found 1 instance in 1 package

Fixed alerts

Network access

Supply chain risk

This module accesses the network.

Found 1 instance in 1 package

Long strings

Supply chain risk

Contains long string literals, which may be a sign of obfuscated or packed code.

Found 1 instance in 1 package

URL strings

Supply chain risk

Package contains fragments of external URLs or IP addresses, which the package may be accessing at runtime.

Found 1 instance in 1 package

Improved metrics

Total package byte prevSize

731273

1.2%

Lines of code

9339

1.02%

No dependency changes