*3jdZddlmZddlZddlmZddlmZmZmZej dZ ej dZ ddd Z dddZ dddZdddZdddZdddZdS) aHelpers for rendering gateway message timestamps exactly once. Gateway messages need timestamps in the LLM context for temporal awareness, but persisted message content should stay clean so replay does not accumulate ``[timestamp] [timestamp] ...`` prefixes across turns. ) annotationsN)datetime)AnyOptionalTuplezv^\[(?P[A-Z][a-z]{2}) (?P\d{4}-\d{2}-\d{2}) (?P