Score and critique content drafts with OpenRouter and LangChain

[
  {
    "data": {
      "nodeType": "trigger"
    },
    "event": "node_start",
    "nodeId": "530b0bc5-7e22-4c3c-bc84-40ae2702479d",
    "timestamp": 1780870215045
  },
  {
    "data": {
      "kind": "n8n-nodes-base.executeWorkflowTrigger"
    },
    "event": "seeded",
    "nodeId": "trigger",
    "timestamp": 1780870215045
  },
  {
    "data": {
      "status": "ok",
      "nodeType": "trigger"
    },
    "event": "node_end",
    "nodeId": "530b0bc5-7e22-4c3c-bc84-40ae2702479d",
    "timestamp": 1780870215045
  },
  {
    "data": {
      "nodeType": "llm"
    },
    "event": "node_start",
    "nodeId": "95423975-6666-4b07-913a-64157101df00",
    "timestamp": 1780870215047
  },
  {
    "data": {
      "messages": 1,
      "maxTokens": 1024
    },
    "event": "calling openai/gpt-4o-mini",
    "nodeId": "llm",
    "timestamp": 1780870215047
  },
  {
    "data": {
      "model": "gpt-4o-mini",
      "provider": "openai"
    },
    "event": "llm_call",
    "nodeId": "_context",
    "timestamp": 1780870215047
  },
  {
    "data": {
      "error": "Google Gemini API error (500): {\n  \"error\": {\n    \"code\": 500,\n    \"message\": \"An internal error has occurred. Please retry or report in https://developers.generativeai.google/guide/troubleshooting\",\n    \"status\": \"INTERNAL\"\n  }\n}\n",
      "status": "error",
      "degraded": true,
      "nodeType": "llm"
    },
    "event": "node_end",
    "nodeId": "95423975-6666-4b07-913a-64157101df00",
    "timestamp": 1780870219179
  },
  {
    "data": {
      "nodeType": "llm"
    },
    "event": "node_start",
    "nodeId": "c24e4222-13b7-4d38-b30b-68d7faf4fe30",
    "timestamp": 1780870219187
  },
  {
    "data": {
      "messages": 2,
      "maxTokens": 1024
    },
    "event": "calling openai/gpt-4o-mini",
    "nodeId": "llm",
    "timestamp": 1780870219187
  },
  {
    "data": {
      "model": "gpt-4o-mini",
      "provider": "openai"
    },
    "event": "llm_call",
    "nodeId": "_context",
    "timestamp": 1780870219187
  },
  {
    "data": {
      "model": "gemini-2.5-flash-lite",
      "costUsd": 0.0000668,
      "provider": "openai",
      "latencyMs": 578,
      "promptTokens": 304,
      "completionTokens": 91
    },
    "event": "llm_result",
    "nodeId": "_context",
    "timestamp": 1780870219766
  },
  {
    "data": {
      "status": "ok",
      "nodeType": "llm"
    },
    "event": "node_end",
    "nodeId": "c24e4222-13b7-4d38-b30b-68d7faf4fe30",
    "timestamp": 1780870219766
  },
  {
    "data": {
      "nodeType": "code"
    },
    "event": "node_start",
    "nodeId": "e88b35ff-602a-4d28-b562-1723aa7795ee",
    "timestamp": 1780870219766
  },
  {
    "data": {
      "status": "ok",
      "nodeType": "code"
    },
    "event": "node_end",
    "nodeId": "e88b35ff-602a-4d28-b562-1723aa7795ee",
    "timestamp": 1780870219770
  }
]