"""Merge changeset artifacts and concurrency locks heads.

Both d0_001_changeset_artifacts and m4_001_concurrency_locks branched
from c0_002_merge_skill_registry independently, creating two Alembic
heads.  This no-op merge migration resolves them into a single head.

Revision ID: d0_002_merge_changeset_and_locks
Revises: d0_001_changeset_artifacts, m4_001_concurrency_locks
Create Date: 2026-02-25 00:00:00

"""

from collections.abc import Sequence

# revision identifiers, used by Alembic.
revision: str = "d0_002_merge_changeset_and_locks"
down_revision: str | Sequence[str] | None = (
    "d0_001_changeset_artifacts",
    "m4_001_concurrency_locks",
)
branch_labels: str | Sequence[str] | None = None
depends_on: str | Sequence[str] | None = None


def upgrade() -> None:
    """Upgrade schema."""
    pass


def downgrade() -> None:
    """Downgrade schema."""
    pass
