f:{"messageId": "msg_1"}
aui-reasoning-part-start:{"unstable_summary": "Let me check the weather."}
g:"Let me check the weather."
0:"Checking"
0:" now."
b:{"toolCallId": "call_1", "toolName": "get_weather"}
c:{"toolCallId": "call_1", "argsTextDelta": "{\"city\": "}
c:{"toolCallId": "call_1", "argsTextDelta": "\"NYC\"}"}
aui-state:[{"type": "set", "path": ["status"], "value": "running"}]
a:{"toolCallId": "call_1", "result": {"status": "working"}, "isPreliminary": true}
a:{"toolCallId": "call_1", "result": {"temp": 70}, "messages": [{"role": "assistant", "content": [{"type": "text", "text": "Sunny"}]}]}
2:[{"progress": 1}]
8:[{"type": "citation", "id": "a1"}]
h:{"sourceType": "url", "id": "s1", "url": "https://example.com", "title": "Example"}
0:"It is sunny."
k:{"data": "aGVsbG8=", "mimeType": "image/png"}
aui-reasoning-part-start:{"unstable_summary": "Nested", "parentId": "parent_1"}
aui-reasoning-delta:{"reasoningDelta": "nested think", "parentId": "parent_1"}
aui-text-delta:{"textDelta": "child text", "parentId": "parent_1"}
b:{"toolCallId": "call_2", "toolName": "nested_tool", "parentId": "parent_1"}
c:{"toolCallId": "call_2", "argsTextDelta": "{}"}
c:{"toolCallId": "call_2", "argsTextDelta": "", "isFinal": true}
a:{"toolCallId": "call_2", "result": {"ok": true}}
h:{"sourceType": "url", "id": "s2", "url": "https://nested.example", "title": "Nested", "parentId": "parent_1"}
k:{"data": "eQ==", "mimeType": "text/plain", "parentId": "parent_1"}
e:{"finishReason": "stop", "usage": {"inputTokens": 12, "outputTokens": 34}, "isContinued": false}
3:{"error": "Forecast delayed", "code": "weather_delay", "severity": "warning"}