"""add_task_remark

Revision ID: f6a7b8c9d0e1
Revises: e5f6a7b8c9d0
Create Date: 2026-08-05

"""
from typing import Sequence, Union
from alembic import op
import sqlalchemy as sa

revision: str = "f6a7b8c9d0e1"
down_revision: Union[str, None] = "e5f6a7b8c9d0"
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    op.add_column("tasks", sa.Column("remark", sa.String(2000), nullable=True, comment="任务初始描述/交接备注"))


def downgrade() -> None:
    op.drop_column("tasks", "remark")