40 lines
1.2 KiB
Python
40 lines
1.2 KiB
Python
"""Internal metadata attached to durable conversation messages."""
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from __future__ import annotations
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from time import time as wall_time
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from typing import Any, MutableMapping, Optional, TypeVar
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# These fields describe Hermes' durable record, not provider-visible message
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# content. They must not influence context-pressure decisions.
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PERSISTENCE_ONLY_MESSAGE_FIELDS = frozenset({"timestamp"})
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_Message = TypeVar("_Message", bound=MutableMapping[str, Any])
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def stamp_message_timestamp(
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message: _Message,
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*,
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timestamp: Optional[float] = None,
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) -> _Message:
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"""Attach a creation timestamp without replacing source-provided time.
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Gateway adapters can supply the platform event time; all other callers use
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the local wall clock. Returns the same mapping for use at append sites.
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"""
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if message.get("timestamp") is None:
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message["timestamp"] = wall_time() if timestamp is None else timestamp
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return message
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def append_message(
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messages: list[Any],
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message: _Message,
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*,
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timestamp: Optional[float] = None,
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) -> _Message:
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"""Stamp and append one live transcript message."""
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messages.append(stamp_message_timestamp(message, timestamp=timestamp))
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return message
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