conv.log lets your function write small, structured log entries that show up in Conversation Review → Diagnosis and in the Conversations API. Use it for breadcrumbs, warnings, and errors.
Logging is part of the core Conversation object. It lives on conv.log, not conv.utils.

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Methods

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PII

Set is_pii=True when the message or fields contain personally identifiable information. 
conv.log.warning("Caller number captured", user_phone="+123…", is_pii=True)
Users without PII permission won’t see PII logs in Review or API responses.

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Where it appears

  • Conversation Review → Diagnosis: grouped under the turn’s function event.
  • Conversations API: returned on function events as logs.conversation_logger.

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Entry shape

Each call produces a JSON object like this: 
{
  "level": "info|warning|error",
  "content": "Message",
  "is_pii": false,
  "timestamp": "2025-01-01T10:00:00Z",
  "logger": "conversation_logger",
  "...": "any extra key–values you passed"
}

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Patterns

Validation 
conv.log.info("Validation ok", validation_passed=True, missing_fields=[])
Retries 
conv.log.error("Inventory API failed", error_code=500, attempt=1, retriable=True)
Companion redaction 
conv.log.warning("User email captured", email="j***@example.com", is_pii=True)
conv.log.info("User email captured [redacted]")

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Best practices

  • Keep messages short; put details in fields.
  • Log at decision points, not in tight loops.
  • Prefer identifiers over payload dumps.
  • Default to is_pii=True if you’re unsure.

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See also