"""
Data layer — canonical BRAIN field registry, operator catalog, and group keys.
This is the pipeline's ground truth for what's available on the platform.
"""
from .brain_fields import (
    ALL_FIELDS, FIELD_INDEX, GOLDMINE_FIELDS, TIER1_MODEL77_FIELDS,
    pick_field, get_backfill_days, get_sign_multiplier,
    BrainField, SignConvention, DatasetTier,
)
from .brain_groups import ALT_GROUPS, PRODUCTION_GROUPS, pick_group, get_group_for_expression

__all__ = [
    "ALL_FIELDS", "FIELD_INDEX", "GOLDMINE_FIELDS", "TIER1_MODEL77_FIELDS",
    "pick_field", "get_backfill_days", "get_sign_multiplier",
    "BrainField", "SignConvention", "DatasetTier",
    "ALT_GROUPS", "PRODUCTION_GROUPS", "pick_group", "get_group_for_expression",
]