"""Per-binding ref — the branch a project's ledger follows (#2873, milestone 294)

Revision ID: 0082
Revises: 0081
Create Date: 2026-08-21

A repo binding used to imply the repo's default branch; the shape ledger
therefore only saw work after a merge to main, while the operator's work
lands on dev (rule 1). `ref` names the branch the coverage refresh reads —
NULL keeps today's behaviour (the forge's default branch).
"""
import sqlalchemy as sa
from alembic import op

revision = "0082"
down_revision = "0081"
branch_labels = None
depends_on = None


def upgrade() -> None:
    op.add_column("repo_bindings", sa.Column("ref", sa.Text(), nullable=True))


def downgrade() -> None:
    op.drop_column("repo_bindings", "ref")
