fix(agents): recover thinking errors from provider body (#98411)

src/agents/embedded-agent-runner/thinking.test.ts

@@ -737,6 +737,18 @@ describe("wrapAnthropicStreamWithRecovery", () => {
           errorMessage: terminalThinkingSignatureError,
         }),
     },
+    {
+      name: "ProviderHttpError errorBody",
+      createError: () =>
+        Object.assign(new Error(genericizedProviderError), {
+          errorBody: JSON.stringify({
+            error: {
+              message: terminalThinkingSignatureError,
+              type: "invalid_request_error",
+            },
+          }),
+        }),
+    },
     {
       name: "cyclic cause graph",
       createError: () => {

src/agents/embedded-agent-runner/thinking.ts

@@ -545,6 +545,7 @@ function shouldRecoverAnthropicThinkingError(
     current.error,
     current.rawError,
     current.errorMessage,
+    current.errorBody,
     current.message,
   ]);
   for (const candidate of candidates) {