fix: harden cloud code assist tool schema sanitizing (#665) (thanks @sebslight)

src/agents/pi-embedded-helpers.test.ts

@@ -363,6 +363,37 @@ describe("sanitizeSessionMessagesImages", () => {
     expect((content as Array<{ type?: string }>)[0]?.type).toBe("toolCall");
   });
 
+  it("sanitizes tool ids for assistant blocks and tool results", async () => {
+    const input = [
+      {
+        role: "assistant",
+        content: [
+          { type: "toolUse", id: "call_abc|item:123", name: "test", input: {} },
+          {
+            type: "toolCall",
+            id: "call_abc|item:456",
+            name: "bash",
+            arguments: {},
+          },
+        ],
+      },
+      {
+        role: "toolResult",
+        toolUseId: "call_abc|item:123",
+        content: [{ type: "text", text: "ok" }],
+      },
+    ] satisfies AgentMessage[];
+
+    const out = await sanitizeSessionMessagesImages(input, "test");
+
+    const assistant = out[0] as { content?: Array<{ id?: string }> };
+    expect(assistant.content?.[0]?.id).toBe("call_abc_item_123");
+    expect(assistant.content?.[1]?.id).toBe("call_abc_item_456");
+
+    const toolResult = out[1] as { toolUseId?: string };
+    expect(toolResult.toolUseId).toBe("call_abc_item_123");
+  });
+
   it("filters whitespace-only assistant text blocks", async () => {
     const input = [
       {