"""Packet policy: who may do what to a packet, and when. Pure functions, no I/O. See docs/POLICY.md."""

from __future__ import annotations

from .actions import ACTIVE, RULES, SHOP, STATUSES, TRANSITIONS, Action, Rule, Who
from .custody import holder_name, holds, works_on
from .engine import Decision, can, check, evaluate
from .preconditions import INPUT_ONLY, MESSAGES, PRECONDITIONS
from .principal import SYSTEM_FEED, PacketState, Principal, principal_from_roles

__all__ = [
    "ACTIVE",
    "INPUT_ONLY",
    "MESSAGES",
    "PRECONDITIONS",
    "RULES",
    "SHOP",
    "STATUSES",
    "SYSTEM_FEED",
    "TRANSITIONS",
    "Action",
    "Decision",
    "PacketState",
    "Principal",
    "Rule",
    "Who",
    "can",
    "check",
    "evaluate",
    "holder_name",
    "holds",
    "principal_from_roles",
    "works_on",
]