One JSONL record in a materialized transcript projection.
Transcript schema version used to interpret this record.
Zero-based position of this record within its transcript.
Message identifier, or a deterministic role-and-sequence fallback.
Source message timestamp when one is available.
Conversation thread that owns this record.
Subagent scope for an agent transcript, otherwise None.
Normalized conversation role for the projected message.
Original LangChain message identifier when one is available.
Redacted JSON-compatible message content.
Tool or message name when one is available.
