fix(agents): harden openai ws tool call id handling

src/agents/openai-ws-stream.ts

@@ -101,6 +101,14 @@ export function hasWsSession(sessionId: string): boolean {
 
 type AnyMessage = Message & { role: string; content: unknown };
 
+function toNonEmptyString(value: unknown): string | null {
+  if (typeof value !== "string") {
+    return null;
+  }
+  const trimmed = value.trim();
+  return trimmed.length > 0 ? trimmed : null;
+}
+
 /** Convert pi-ai content (string | ContentPart[]) to plain text. */
 function contentToText(content: unknown): string {
   if (typeof content === "string") {
@@ -211,11 +219,16 @@ export function convertMessagesToInputItems(messages: Message[]): InputItem[] {
               });
               textParts.length = 0;
             }
+            const callId = toNonEmptyString(block.id);
+            const toolName = toNonEmptyString(block.name);
+            if (!callId || !toolName) {
+              continue;
+            }
             // Push function_call item
             items.push({
               type: "function_call",
-              call_id: typeof block.id === "string" ? block.id : `call_${randomUUID()}`,
-              name: block.name ?? "",
+              call_id: callId,
+              name: toolName,
               arguments:
                 typeof block.arguments === "string"
                   ? block.arguments
@@ -245,14 +258,19 @@ export function convertMessagesToInputItems(messages: Message[]): InputItem[] {
 
     if (m.role === "toolResult") {
       const tr = m as unknown as {
-        toolCallId: string;
+        toolCallId?: string;
+        toolUseId?: string;
         content: unknown;
         isError: boolean;
       };
+      const callId = toNonEmptyString(tr.toolCallId) ?? toNonEmptyString(tr.toolUseId);
+      if (!callId) {
+        continue;
+      }
       const outputText = contentToText(tr.content);
       items.push({
         type: "function_call_output",
-        call_id: tr.toolCallId,
+        call_id: callId,
         output: outputText,
       });
       continue;
@@ -280,10 +298,14 @@ export function buildAssistantMessageFromResponse(
         }
       }
     } else if (item.type === "function_call") {
+      const toolName = toNonEmptyString(item.name);
+      if (!toolName) {
+        continue;
+      }
       content.push({
         type: "toolCall",
-        id: item.call_id,
-        name: item.name,
+        id: toNonEmptyString(item.call_id) ?? `call_${randomUUID()}`,
+        name: toolName,
         arguments: (() => {
           try {
             return JSON.parse(item.arguments) as Record<string, unknown>;