【アップデート】Claude Code v2.1.193 でOpenTelemetry の新しいログイベント `claude_code.assistant_response`が追加されました

  "env": {
    "CLAUDE_CODE_ENABLE_TELEMETRY": "1",
    "OTEL_LOG_TOOL_DETAILS": "1",
    "OTEL_METRICS_EXPORTER": "otlp",
    "OTEL_LOGS_EXPORTER": "otlp",
    "OTEL_EXPORTER_OTLP_PROTOCOL": "http/protobuf",
    "OTEL_EXPORTER_OTLP_ENDPOINT": "https://xxxxxxxxxxxxxxxxxxxxxx",
    "OTEL_EXPORTER_OTLP_HEADERS": "x-api-key=xxxxxxxxxxxxxxxxxxxxxxxxxxxx",
    "OTEL_RESOURCE_ATTRIBUTES": "user.email=xxxxxxxxxxxxxxxxxxxxxxxxx",
    "OTEL_METRICS_INCLUDE_VERSION": "true",
    "OTEL_TRACES_EXPORTER": "otlp",
    "OTEL_SERVICE_NAME": "claude-code",
    "OTEL_LOG_USER_PROMPTS": "1"
  },

{
  "textPayload": "claude_code.user_prompt",
  "insertId": "xxxxxxxxxxxxxxxxxxxx",
  "resource": {
    "type": "generic_task",
    "labels": {
      "namespace": "",
      "job": "claude-code",
      "task_id": "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx",
      "project_id": "<PROJECT_ID>",
      "location": "asia-northeast1"
    }
  },
  "timestamp": "2026-06-26T07:47:44.633Z",
  "labels": {
    "service.name": "claude-code",
    "organization.id": "<ORG_ID>",
    "user.email": "<USER_EMAIL>",
    "user.id": "<USER_ID_HASH>",
    "terminal.type": "vscode",
    "event.name": "user_prompt",
    "instrumentation_version": "2.1.193",
    "session.id": "<SESSION_ID>",
    "user.account_uuid": "<ACCOUNT_UUID>",
    "prompt_length": "13",
    "prompt": "今までの会話内容を要約して",
    "event.sequence": "12",
    "app.version": "2.1.193",
    "instrumentation_source": "com.anthropic.claude_code.events",
    "event.timestamp": "2026-06-26T07:47:44.633Z",
    "user.account_id": "<ACCOUNT_ID>",
    "prompt.id": "<PROMPT_ID>"
  },
  "logName": "projects/<PROJECT_ID>/logs/claude-code-telemetry",
  "receiveTimestamp": "2026-06-26T07:47:50.517996202Z"
}

{
  "textPayload": "claude_code.assistant_response",
  "insertId": "xxxxxxxxxxxxxxxxxxxx",
  "resource": {
    "type": "generic_task",
    "labels": {
      "namespace": "",
      "job": "claude-code",
      "project_id": "<PROJECT_ID>",
      "task_id": "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx",
      "location": "asia-northeast1"
    }
  },
  "timestamp": "2026-06-26T07:47:59.621Z",
  "labels": {
    "user.email": "<USER_EMAIL>",
    "user.id": "<USER_ID_HASH>",
    "service.name": "claude-code",
    "response": "## 会話の要約\n\n**作業内容**: Claude Code v2.1.193 の新機能に関する調査\n\n---\n\n### 1. 調査フェーズ\n\n`claude_code.assistant_response` について以下のソースで調査しました。\n\n- **CHANGELOG.md**（GitHub）: v2.1.193 の該当エントリを確認\n- **公式ドキュメント**: `code.claude.com/docs/en/monitoring-usage` および `observability` ページを取得\n\n**判明した仕様:**\n- `claude_code.assistant_response` はモデルの応答テキストを含む新しい OTel ログイベント\n- デフォルトはリダクション（`OTEL_LOG_ASSISTANT_RESPONSES=1` で有効化）\n- **未設定時は `OTEL_LOG_USER_PROMPTS` の値に連動**する（既に `=1` の環境ではアップグレード後に応答も自動でロギング開始される）\n\n---\n\n### 2. 調査内容の作成\n\n`/home/<USERNAME>/investigation/2026-06-26-claude-code-assistant-response-otel.md` を作成。OTel の基本設定を含む構成にしました。\n\n---\n\n### 3. 調査内容のリライト\n\nユーザーから「OTel は `~/.claude/settings.json` で設定済みで Google Cloud に転送されている」とのフィードバックを受け、`settings.json` を確認。\n### 4. セッションダンプ\n\n`/session-dump` で `daily-log/2026-06-26.md` に本セッションの作業内容を追記して完了。",
    "organization.id": "<ORG_ID>",
    "instrumentation_version": "2.1.193",
    "session.id": "<SESSION_ID>",
    "event.name": "assistant_response",
    "user.account_uuid": "<ACCOUNT_UUID>",
    "terminal.type": "vscode",
    "event.sequence": "14",
    "response_length": "968",
    "app.version": "2.1.193",
    "user.account_id": "<ACCOUNT_ID>",
    "request_id": "<REQUEST_ID>",
    "prompt.id": "<PROMPT_ID>",
    "query_source": "repl_main_thread",
    "model": "claude-sonnet-4-6",
    "event.timestamp": "2026-06-26T07:47:59.621Z",
    "instrumentation_source": "com.anthropic.claude_code.events"
  },
  "logName": "projects/<PROJECT_ID>/logs/claude-code-telemetry",
  "receiveTimestamp": "2026-06-26T07:48:05.515809866Z"
}