fix(core): preserve the first terminal failure (#37705)

packages/ai/test/provider/openai-responses.test.ts

@@ -1290,8 +1290,6 @@ describe("OpenAI Responses route", () => {
         id: "call_1",
         name: "lookup",
         raw: '{"query":"partial',
-        message: "Invalid JSON input for openai-responses tool call lookup",
-        providerMetadata: { openai: { itemId: "item_1" } },
       })
       expect(response.finishReason).toBe("tool-calls")
       expect(response.events.some(LLMEvent.is.toolCall)).toBeFalse()

packages/ai/test/response.test.ts

@@ -104,7 +104,6 @@ describe("LLMResponse reducer", () => {
         id: "call_1",
         name: "lookup",
         raw: '{"query":"partial',
-        message: "Invalid JSON input",
       }),
     ])
 

packages/ai/test/tool-stream.test.ts

@@ -81,7 +81,6 @@ describe("ToolStream", () => {
             id: "call_1",
             name: "lookup",
             raw: '{"query":"partial',
-            message: "Invalid JSON input for test-route tool call lookup",
           },
         ],
       })
@@ -112,7 +111,6 @@ describe("ToolStream", () => {
             id: "call_invalid",
             name: "lookup",
             raw: '{"query":"partial',
-            message: "Invalid JSON input for test-route tool call lookup",
           },
         ],
       })