"""System context keys only. Domain keys are registered later, never hardcoded into prompts."""
from __future__ import annotations

from datetime import datetime, timezone

from placeholders import Placeholder, register

register(
    Placeholder(
        key="now",
        description="UTC-Zeitstempel der Auflösung. Kein Personenbezug.",
        data_class="C",
        resolver=lambda _ctx: datetime.now(timezone.utc).replace(microsecond=0).isoformat(),
    )
)